Patent Publication Number: US-7903100-B2

Title: Image display apparatus, image display method, and signal processing apparatus

Description:
CROSS REFERENCES TO RELATED APPLICATIONS 
     The present invention contains subject matter related to Japanese Patent Application JP 2004-270718 filed in the Japanese Patent Office on Sep. 17, 2004, the entire contents of which are incorporated herein by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention generally relates to an image display apparatus, an image display method, and a signal processing apparatus and, in particular, to an image display apparatus, an image display method, and a signal processing apparatus for providing a convenient apparatus functioning as a plurality of tools, such as a tool for displaying an image and a partition. 
     2. Description of the Related Art 
     For example, known television receivers solely serve as apparatuses for displaying an image (and apparatuses for outputting sound). The television receiver that functions as an apparatus only for displaying an image is placed at, for example, a certain position in a room. 
     The television receiver placed at a certain position in a room need not be basically moved. However, in some cases, a user wants to move the direction of the television screen towards the user&#39;s position. To change the direction of the television screen, a television table has been developed. 
     In addition, a television receiver has been proposed that can rotate itself about an axis normal to a screen of the television receiver for a user watching the screen while lying (refer to, for example, Japanese Unexamined Utility Model Registration Application Publication No. 6-73976). 
     As described above, known television receivers solely serve as apparatuses for displaying an image. 
     SUMMARY OF THE INVENTION 
     Accordingly, there is provided a convenient apparatus functioning as a plurality of tools, such as a tool for displaying an image and a partition. 
     According to an embodiment of the present invention, an image display apparatus functioning as both a partition and an apparatus for displaying an image includes image display means for displaying the image, reception means for receiving an operational input from a user, and drive control means for driving an actuator for moving the image display means to move the image display means. The drive control means changes the arrangement of the image display apparatus functioning as the partition by moving the image display means on the basis of the operational input received by the reception means. 
     The image display apparatus can further include motion detection means for detecting motion information on motion of the image displayed on the image display means. In this case, the image display apparatus provides, as an operation mode, a display mode in which the image display apparatus functions as the apparatus for displaying the image and a partition mode in which the image display apparatus functions as the partition. When the partition mode is enabled, the drive control means moves the image display means on the basis of the operational input. When the display mode is enabled, the drive control means moves the image display means on the basis of the motion information detected by the motion detection means. 
     When the display mode is selected while the partition mode is enabled, the drive control means can move the image display means on the basis of the motion information using a position of the image display means when the display mode is enabled as a reference position. 
     Additionally, when the display mode is selected while the partition mode is enabled, the drive control means can move the image display means to a default position and moves the image display means on the basis of the motion information using the default position as a reference position. 
     When the partition mode is selected while the display mode is enabled, the drive control means can move the image display means on the basis of the operational input. 
     The image display apparatus can further include conversion means for converting an image signal of the image displayed on the image display means to a different image signal having higher image quality than the image displayed on the image display means. The conversion means can include classification means, tap coefficient output means, and computing means. The classification means classifies a pixel of the different image signal into one of a plurality of classes on the basis of the image signal and outputs a class code for representing the class of the pixel. The tap coefficient output means stores a tap coefficient obtained from a learning process for each of the plurality of classes and outputs a tap coefficient of a class indicated by the class code output from the classification means, and the computing means determines a pixel value of the different image signal by performing a computation based on the tap coefficient output from the tap coefficient output means and the image signal. 
     The tap coefficient output means can store a tap coefficient corresponding to each position of the image display means and corresponding to each of the plurality of classes, and can output a tap coefficient corresponding to a class indicated by the class code output from the classification means and corresponding to the position of the image display means. 
     According to an embodiment of the present invention, a method of controlling an image display apparatus configured to function as both an apparatus for displaying an image and a partition includes the steps of (a) receiving an operational input from a user and (b) driving an actuator configured to move image display means to move the image display means. Step (b) changes the arrangement of the image display apparatus functioning as the partition by moving the image display means on the basis of the operational input received in step (a). 
     The method can further include the step of (c) detecting motion information on motion of the image displayed on the image display means. The method can provide, as an operation mode, a display mode in which the image display apparatus functions as the apparatus for displaying the image and a partition mode in which the image display apparatus functions as the partition. When the partition mode is enabled, step (b) can move the image display means on the basis of the operational input and, when the display mode is enabled, step (b) can move the image display means on the basis of the motion information detected in step (c). 
     According to an embodiment of the present invention, a signal processing apparatus functioning as both an apparatus for processing a signal and furniture includes signal processing means for processing an input signal, reception means for receiving an operational input from a user, and drive control means for controlling drive means for driving the signal processing apparatus on the basis of one of a signal obtained by signal processing of the signal processing means and the operational input received by the reception means. 
     According to an embodiment of the present invention, a signal processing apparatus functioning as both an apparatus configured to process a signal and furniture includes a signal processing unit configured to process an input signal, a reception unit configured to receive an operational input from a user, and a drive control unit configured to control a drive unit configured to drive the signal processing apparatus on the basis of one of a signal obtained by signal processing of the signal processing unit and the operational input received by the reception unit. 
     In an image display apparatus and method for displaying an image according to an embodiment of the present invention, the image display apparatus functioning as both an apparatus for displaying an image and a partition receives an operational input from a user and changes the arrangement of the image display apparatus functioning as the partition by moving the image display means using an actuator for moving image display means on the basis of the operational input received by the reception means. 
     In a signal processing apparatus according to an embodiment of the present invention, a signal processing apparatus functioning as both an apparatus for processing a signal and furniture receives an operational input from a user and controls driving means for driving the signal processing apparatus on the basis of a signal obtained by signal processing of signal processing means or the operational input received by the reception means. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates a perspective view of a partition TV according to an embodiment of the present invention; 
         FIG. 2  illustrates a perspective view of the partition TV when a display panel  3  vertically moves upward; 
         FIG. 3  illustrates a top plan view of an example of the installation layout of the partition TV; 
         FIG. 4  illustrates a top plan view of another example of the installation layout of the partition TV; 
         FIG. 5  illustrates a perspective view of a partition TV according to another embodiment of the present invention; 
         FIG. 6  illustrates a perspective view of the partition TV when a display panel  3  moves to the right; 
         FIG. 7  illustrates a perspective view of the partition TV when the display panel  3  moves to the upper right; 
         FIG. 8  is a block diagram of the electrical configuration of a partition TV; 
         FIG. 9  is a block diagram of an example of the configuration of a DRC unit  17 ; 
         FIG. 10  is a block diagram of an example of the configuration of a learning apparatus for learning a tap coefficient; 
         FIG. 11  is a flow chart illustrating a learning process of the learning apparatus; 
         FIG. 12  is a block diagram of an example of a coefficient generation unit  55 ; 
         FIG. 13  is a flow chart illustrating an image conversion process of the DRC unit  17 ; 
         FIG. 14  is a flow chart illustrating the operation of the partition TV when a partition mode is enabled; 
         FIG. 15  is a flow chart illustrating the operation of the partition TV when a display mode is enabled; 
         FIG. 16  is a flow chart illustrating the operation of the partition TV when the partition mode is enabled and subsequently the display mode is enabled; 
         FIG. 17  is a flow chart illustrating the operation of the partition TV when the display mode is enabled and subsequently the partition mode is enabled; 
         FIG. 18  is a block diagram of another electrical configuration of the partition TV; 
         FIG. 19  is a block diagram of an example of the configuration of a DRC unit  217 ; 
         FIG. 20  is a flow chart illustrating an image conversion process of the DRC unit  217 ; 
         FIG. 21  illustrates a perspective view of an air conditioner TV; 
         FIG. 22  illustrates a perspective view of the air conditioner TV; 
         FIG. 23  illustrates a right side cross-sectional view of the structure of the air conditioner TV; 
         FIG. 24  illustrates a right side cross-sectional view of the structure of the air conditioner TV; 
         FIG. 25  illustrates a right side cross-sectional view of the air conditioner TV; 
         FIG. 26  is a block diagram of the electrical configuration of a circuit block  411 ; 
         FIG. 27  is a flow chart illustrating the operation of the air conditioner TV; 
         FIG. 28  illustrates a right side cross-sectional view of another structure of the air conditioner TV; and 
         FIG. 29  illustrates a right side cross-sectional view of another structure of the air conditioner TV. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Before describing an embodiment of the present invention, the correspondence between the features of the claims and the specific elements disclosed in an embodiment of the present invention is discussed below. This description is intended to assure that an embodiments supporting the claimed invention are described in this specification. Thus, even if an element in the following embodiments is not described as relating to a certain feature of the present invention, that does not necessarily mean that the element does not relate to that feature of the claims. Conversely, even if an element is described herein as relating to a certain feature of the claims, that does not necessarily mean that the element does not relate to other features of the claims. 
     Furthermore, this description should not be construed as restricting that all the aspects of the invention disclosed in the embodiments are described in the claims. That is, the description does not deny the existence of aspects of the present invention that are described in the embodiments but not claimed in the invention of this application, i.e., the existence of aspects of the present invention that in future may be claimed by a divisional application, or that may be additionally claimed through amendments. 
     An image display apparatus according to the claim  1  is characterized in that the apparatus (e.g., a partition TV shown in  FIGS. 1 and 5 ) functions as both an apparatus for displaying an image and a partition. The image display apparatus includes image display means for displaying the image (e.g., a display panel  3  shown in  FIG. 5 ), reception means for receiving an operational input from a user (e.g., a remote control I/F  34  shown in  FIG. 8 ), and drive control means for driving an actuator for moving the image display means to move the image display means (e.g., a drive control unit  42  shown in  FIG. 8 ). The drive control means changes the arrangement of the image display apparatus functioning as the partition by moving the image display means on the basis of the operational input received by the reception means. 
     An image display apparatus according to the claim  2  is characterized in that the apparatus according to the claim  1  further includes motion detection means (e.g., a motion vector detection unit  41  shown in  FIG. 8 ) for detecting motion information on motion of the image displayed on the image display means. The image display apparatus provides, as an operation mode, a display mode in which the image display apparatus functions as the apparatus for displaying the image and a partition mode in which the image display apparatus functions as the partition. When the partition mode is enabled, the drive control means moves the image display means on the basis of the operational input and, when the display mode is enabled, the drive control means moves the image display means on the basis of the motion information detected by the motion detection means. 
     An image display apparatus according to the claim  6  is characterized in that the apparatus according to the claim  2  further includes conversion means (e.g., a DRC unit  17  shown in  FIG. 8 ) for converting an image signal of the image displayed on the image display means to a different image signal having higher image quality than the image displayed on the image display means. The conversion means includes classification means (e.g., a classification unit  52  shown in  FIG. 9 ), tap coefficient output means (e.g., a coefficient generation unit  55  shown in  FIG. 9 ), and computing means (e.g., a prediction computing unit  56  shown in  FIG. 9 ). The classification means classifies a pixel of the different image signal into one of a plurality of classes on the basis of the image signal and outputs a class code for representing the class of the pixel, the tap coefficient output means stores a tap coefficient obtained from a learning process for each of the plurality of classes and outputs a tap coefficient of a class indicated by the class code output from the classification means, and the computing means determines a pixel value of the different image signal by performing a computation based on the tap coefficient output from the tap coefficient output means and the image signal. 
     A method according to the claim  8  controls an image display apparatus (e.g., the partition TV shown in  FIGS. 1 and 5 ) configured to function as both an apparatus for displaying an image and a partition. The method includes the steps of (a) receiving an operational input from a user (e.g., step S 31  shown in  FIG. 14 ) and (b) driving an actuator configured to move image display means to move the image display means (e.g., step S 32  shown in  FIG. 14 ). Step (b) changes the arrangement of the image display apparatus functioning as the partition by moving the image display means on the basis of the operational input received in step (a). 
     A method according to the claim  9  is characterized in that the method according to the claim  8  further includes the step of (c) detecting motion information on motion of the image displayed on the image display means (e.g., step S 42  shown in  FIG. 15  or step S 57  shown in  FIG. 16 ). The method provides a display mode in which the image display apparatus functions as the apparatus for displaying the image and a partition mode in which the image display apparatus functions as the partition. When the partition mode is enabled, step (b) moves the image display means on the basis of the operational input and, when the display mode is enabled, step (b) moves the image display means on the basis of the motion information detected in step (c). 
     A signal processing apparatus according to the claim  10  is characterized in that the apparatus (e.g., the partition TV shown in  FIGS. 1 and 5 ) functions as both an apparatus for processing a signal and furniture. The signal processing apparatus includes signal processing means for processing an input signal (e.g., the motion vector detection unit  41  shown in  FIG. 8 ), reception means for receiving an operational input from a user (e.g., the remote control I/F  34  shown in  FIG. 8 ), and drive control means (e.g., the drive control unit  42  shown in  FIG. 8 ) for controlling drive means (e.g., the actuator  43  shown in  FIG. 8 ) for driving the signal processing means on the basis of one of a signal obtained by signal processing of the signal processing means and the operational input received by the reception means. 
     Embodiments of the present invention are described with reference to the accompanying drawings. 
       FIG. 1  illustrates a perspective view of a partition TV (partition television) according to an embodiment of the present invention. 
     The partition TV is a television receiver (image displaying apparatus) functioning as both an apparatus for displaying an image and a partition. 
     In the partition TV, for example, a circular top panel  2  is mounted on a base frame  1  so that the circular top panel can rotate about its center axis. Additionally, a display panel  3  and a support panel  4  are mounted on the top panel  2 . 
     The display panel  3  has a rectangular flat-plate shape. One surface of the rectangular plate includes a display unit  3 A, which is composed of, for example, a liquid crystal panel or a panel of a plasma display screen. 
     Like the display panel  3 , the support panel  4  has a rectangular flat-plate shape. Vertically extending shafts  4 L and  4 R are attached to the left and right sides of one surface of the rectangular support panel  4 , respectively. The support panel  4  is mounted on the top panel  2  along the diameter of the top panel  2  so that the support panel  4  is perpendicular to the top panel  2 . 
     The display panel  3  is attached to the support panel  4  such that the display panel  3  can vertically move along the shafts  4 L and  4 R of the support panel  4  and the other surface of the display panel  3  opposed to the display unit  3 A faces the support panel  4 . 
     Consequently, when the top panel  2  rotates, the display panel  3  can move or rotate about the center axis of the top panel  2  in the counterclockwise direction or the clockwise direction. Additionally, the display panel  3  can vertically move along the shafts  4 L and  4 R of the support panel  4 . 
     That is, the partition TV shown in  FIG. 1  includes an actuator (not shown in  FIG. 1 ) that rotates the top panel  2  and thus the display panel  3  in the counterclockwise direction or the clockwise direction and that vertically moves the display panel  3 . The actuator is actuated by a user operating a remote control unit (remote commander)  10 . The operating actuator moves the display panel  3 . 
       FIG. 2  illustrates the partition TV shown in  FIG. 1  when the display panel  3  vertically moves upwards along the shafts  4 L and  4 R. 
     Even when the display panel  3  moves upwards, the display panel  3  can rotate in the counterclockwise direction or the clockwise direction together with the rotation of the top panel  2 . 
     The function of the partition TV as a partition is described with reference to  FIGS. 3 and 4 . 
       FIG. 3  illustrates an example of the installation layout of the partition TV. 
       FIG. 3  ( FIG. 4  described below) is a top plan view of a room R in which the partition TV is installed. 
     For example, when partitioning the single room R into two spaces (rooms) S 1  and S 2 , the partition TV is installed so that the center point of the top panel  2  is located on the border line between the spaces S 1  and S 2 . The base frame  1  is sunk into a floor so that the height level of the top panel  2  is identical to that of the floor. 
     As shown in  FIG. 3 , by moving the display panel  3  (and the support panel  4 ) onto the border line between the spaces S 1  and S 2 , the single room R can be separated into the two spaces S 1  and S 2 . In the layout shown in  FIG. 3 , by moving the display panel  3  downward, the relationship (connection relationship) between the spaces S 1  and S 2  becomes “thicker”. In contrast, by moving the display panel  3  upward, the relationship between the spaces S 1  and S 2  becomes “thinner”. That is, by moving the display panel  3  upward, the spaces S 1  and S 2  are more clearly separated. 
       FIG. 4  illustrates another example of the installation layout of the partition TV. 
     As shown in  FIG. 4 , the display panel  3  rotates from the position shown in  FIG. 3  in the clockwise direction. In this case, walk spaces W L  and W R  are provided on the left and right sides of the room R for a user to pass between the spaces S 1  and S 2 . 
       FIG. 5  is a perspective view of a partition TV according to another embodiment of the present invention. In the drawing, identical elements to those illustrated and described in relation to  FIG. 1  are designated by identical reference numerals, and therefore, the descriptions are not repeated here. That is, the partition TV shown in  FIG. 5  is basically identical to that shown in  FIG. 1  except that the partition TV shown in  FIG. 5  further includes a support panel  5  between the display panel  3  and the support panel  4 . 
     In the partition TV shown in  FIG. 1 , the display panel  3  is mounted to the support panel  4 . However, in the partition TV shown in  FIG. 5 , the display panel  3  is mounted to the support panel  5 , which is mounted on the support panel  4  secured to the top panel  2 . 
     That is, like the display panel  3  and the support panel  4 , the support panel  5  has a rectangular flat-plate shape. Horizontally extending shafts  5 U and  5 D are attached to the upper and lower sides of one surface of the rectangular support panel  5 , respectively. 
     The display panel  3  is attached to the support panel  5  such that the display panel  3  can horizontally move along the shafts  5 U and  5 D of the support panel  5  and the other surface of the display panel  3  opposed to the display unit  3 A faces the support panel  5 . 
     Additionally, the support panel  5  is attached to the support panel  4  secured to the top panel  2  so that the support panel  5  can vertically move along the shafts  4 L and  4 R of the support panel  4  and the other surface of the support panel  5  opposed to the display panel  3  faces the support panel  4 . 
     Consequently, like the case shown in  FIG. 1 , the display panel  3  can rotate about the center axis of the top panel  2  in the counterclockwise direction or the clockwise direction together with the rotation of the top panel  2 . Additionally, by vertically moving the support panel  5  along the shafts  4 L and  4 R of the support panel  4 , the display panel  3  attached to the support panel  5  can also move vertically. Furthermore, the display panel  3  can horizontally move along the shafts  5 U and  5 D of the support panel  5 . 
     That is, the partition TV shown in  FIG. 5  includes an actuator (not shown in  FIG. 5 ) that rotates the display panel  3  in the counterclockwise direction or the clockwise direction and that horizontally and vertically moves the display panel  3 . The actuator is actuated, for example, by a user operating a remote control unit  10 . The operating actuator moves the display panel  3 . 
       FIG. 6  illustrates the partition TV shown in  FIG. 5  when the display panel  3  horizontally moves to the right along the shafts  5 U and  5 D. 
     Even when the display panel  3  moves horizontally, the display panel  3  can rotate in the counterclockwise direction or the clockwise direction together with the rotation of the top panel  2 . 
       FIG. 7  illustrates the partition TV shown in  FIG. 5  when the display panel  3  horizontally moves to the right along the shafts  5 U and  5 D, the support panel  5  vertically moves upward, and the display panel  3  mounted to the support panel  5  also moves upward. 
     Since the display panel  3  moves to the right along the shafts  5 U and  5 D and the support panel  5  holding the display panel  3  moved upward along the shafts  4 L and  4 R, the display panel  3  can move in a direction towards the upper right corner. 
     In addition, the partition TV shown in  FIG. 5  can move the display panel  3  in any direction on a plane perpendicular to the top panel  2 . 
     Furthermore, in the partition TV shown in  FIG. 5 , by rotating the top panel  2 , the display panel  3  can rotate in the counterclockwise direction or the clockwise direction even when, for example, the display panel  3  moves in a direction towards the upper right corner, as shown in  FIG. 7 . 
       FIG. 8  is a block diagram of the electrical configuration of the partition TV shown in  FIG. 1  or  5 . 
     A tuner  11  is supplied with a broadcast signal of digital broadcast received by an antenna (not shown). For example, the broadcast signal of digital broadcast is digital data defined by the moving picture experts group (MPEG) 2 and is a broadcast signal of a transport stream (TS) consisting of a plurality of TS packets. Under the control of a controller  31 , the tuner  11  selects a broadcast signal of a predetermined channel (frequency) from among broadcast signals of a plurality of channels supplied from the antenna. The tuner  11  then delivers the broadcast signal of the selected channel to a demodulation unit  12 . 
     Under the control of the controller  31 , the demodulation unit  12  demodulates a transport stream of the broadcast signal of the predetermined channel delivered from the tuner  11  into a transport stream using, for example, the quadrature phase shift keying (QPSK) technique. The demodulated transport stream is then delivered to an error correction processing unit  13 . 
     Under the control of the controller  31 , the error correction processing unit  13  detects and corrects an error in the transport stream delivered from the demodulation unit  12 . The error-corrected transport stream is then delivered to a de-multiplexer  14 . 
     Under the control of the controller  31 , the de-multiplexer  14  descrambles the transport stream delivered from the error correction processing unit  13  as needed. The de-multiplexer  14  also extracts a TS packet of a predetermined program from the transport stream delivered from the error correction processing unit  13  by referencing a packet identifier (PID) of the TS packet under the control of the controller  31 . 
     Thereafter, the de-multiplexer  14  delivers video data (a TS packet containing the video data), which is one of the TS packets of the predetermined program, to a video decoder  15  and delivers audio data (a TS packet containing the audio data), which is one of the TS packets of the predetermined program, to the video decoder  15 . 
     The video decoder  15  decodes the video data delivered from the de-multiplexer  14  using the MPEG-2 method and delivers the decoded video data to a digital reality creation (DRC) unit  17 , a combining unit  18 , and a motion vector detection unit  41 . 
     An audio decoder  16  decodes the audio data delivered from the de-multiplexer  14  using the MPEG-2 method and delivers the decoded audio data to a speaker  20  to output it. 
     The DRC unit  17  converts an image signal (the video data) output from the video decoder  15 , which is a first image signal, to a high-quality image signal (video data), which is a second image signal. The DRC unit  17  then delivers (outputs) the high-quality image signal to the combining unit  18 . As used herein, the high-quality image signal refers to, for example, a high-quality image signal whose resolution is improved. 
     When the image signal is delivered from the DRC unit  17 , the combining unit  18  selects that image signal. In contrast, when no image signal is delivered from the DRC unit  17 , the combining unit  18  selects the image signal delivered from the video decoder  15 . Additionally, the combining unit  18  overlaps an image signal delivered from an on screen display (OSD) unit  19  with the image signal delivered from either video decoder  15  or DRC unit  17 , and supplies it to the display unit  3 A to display it. If no image signal is delivered from the OSD unit  19 , the combining unit  18  directly supplies the selected one of the image signals delivered from the video decoder  15  and the DRC unit  17  to the display unit  3 A to display it. 
     Under the control of the controller  31 , the OSD unit  19  generates, for example, image signals for the currently selected channel number and the sound volume and delivers them to the combining unit  18 . 
     The controller  31  includes a central processing unit (CPU)  31 A, a read only memory (ROM)  31 B, a random access memory (RAM)  31 C, and an electrically erasable and programmable ROM (EEPROM)  31 D. The CPU  31 A executes programs stored in the ROM  31 B and the EEPROM  31 D. The CPU  31 A also executes programs loaded in the RAM  31 C. The ROM  31 B stores a program to be executed first when power is supplied to the controller  31  and data required for the program. The EEPROM  31 D stores a variety of application programs to be executed by the CPU  31 A and data required for the programs. The application program to be executed by the CPU  31 A is loaded in the RAM  31 C from the EEPROM  31 D. The RAM  31 C also stores data required for the execution of the CPU  31 A. 
     The EEPROM  31 D also stores flags, which are described below, in addition to the application programs. Furthermore, the EEPROM  31 D stores data to be held after the partition TV is powered off. That is, the EEPROM  31 D stores the channel selected and the sound volume set immediately before the power is turned off. Next time the power is turned on, the CPU  31 A determines the channel and the sound volume to be the previously selected or set ones by referencing the data stored in the EEPROM  31 D. 
     In the controller  31 , the CPU  31 A carries out a variety of processes including processes described below by executing the programs stored in the ROM  31 B and the EEPROM  31 D, and the programs loaded in the RAM  31 C. Thus, the controller  31  controls, for example, the tuner  11 , the demodulation unit  12 , the error correction processing unit  13 , the de-multiplexer  14 , the video decoder  15 , the audio decoder  16 , the DRC unit  17 , the OSD unit  19 , and a drive control unit  42 . In addition, in the controller  31 , the CPU  31 A carries out a variety of processes on the basis of operation signals (operational inputs) corresponding to the user operations input via a key input unit  32  and a remote control interface  34 . 
     The programs to be executed by the CPU  31 A can be preinstalled in the ROM  31 B and the EEPROM  31 D. The programs can be supplied as package software by being temporarily or permanently stored (recorded) in a removable recoding medium, such as a flexible disk, a compact disc read only memory (CD-ROM), a magneto optical (MO) disk, a digital versatile disc (DVD), a magnetic disk, and a semiconductor memory. 
     Furthermore, the programs can be wirelessly transferred to the partition TV from a download site via an artificial satellite for digital satellite broadcast or can be transferred to the partition TV by wire from the download site via a network, such as a local area network (LAN) or the Internet. The partition TV can install the transferred programs in the EEPROM  31 D by receiving the programs with a communication interface (I/F)  36 , which is described below. 
     The key input unit  32  is composed of, for example, switch buttons to input the user operation, such as a desired channel selection. The key input unit  32  then delivers an operation signal corresponding to the user operation to the controller  31 . A display unit  33  displays, for example, a channel selected by the tuner  11  and information set for the partition TV on the basis of the control signal delivered from the controller  31 . 
     The remote control interface (I/F)  34  receives the operation signal corresponding to the user operation supplied from a light-receiving unit  35  and delivers the signal to the controller  31 . The light-receiving unit  35  receives an infrared or radio operation signal corresponding to the user operation transmitted from the remote control unit  10  and delivers the signal to the remote control I/F  34 . 
     Under the control of the controller  31 , the communication I/F  36  controls communications with a network, such as the Internet and a LAN, to transmit data including a program to the network and receive data from the network. 
     The motion vector detection unit  41  detects a motion vector, which is information about motion of an image displayed on the display unit  3 A of the display panel  3 , from an image signal delivered from the video decoder  15 . The motion vector detection unit  41  then delivers the motion vector to the drive control unit  42 . 
     That is, the motion vector detection unit  41  detects “full screen” motion in each frame (or field). For example, when an image is captured by a camera horizontally panning or vertically tilting, the motion vector detection unit  41  detects a motion vector representing the full screen motion of the image caused by the panning or tilting action and delivers the motion vector to the drive control unit  42 . 
     The motion vector representing full screen motion can be detected not only from the image signal delivered from the video decoder  15  but also from, for example, a motion vector in each macro block contained in video data to be decoded by the video decoder  15 . That is, for a P (predictive) picture or a B (bi-directionally predictive) picture in video data to be decoded by the video decoder  15 , when motion vectors of all macro blocks in a frame are substantially the same, an average value of the motion vectors of all the macro blocks or one of the motion vectors can be detected as a motion vector representing the full screen motion. 
     The drive control unit  42  drives an actuator  43  for moving the display panel  3  to move the display panel  3  on the basis of the motion vector from the motion vector detection unit  41  and the control of the controller  31 . 
     The actuator  43  is controlled by the drive control unit  42  to drive the top panel  2 , the display panel  3 , and the support panel  5 . Thus, the actuator  43  moves the display panel  3 . The actuator  43  can be composed of, for example, a motor. 
     In the partition TV having such a structure, the tuner  11  selects a transport stream of a specific channel (frequency range) from among transport streams of broadcast signals of digital broadcast received the antenna and delivers the selected transport stream to the de-multiplexer  14  via the demodulation unit  12  and the error correction processing unit  13 . The de-multiplexer  14  selects a TS packet for the specific program from the supplied transport streams and delivers the TS packet of video data and the TS packet of audio data to the video decoder  15  and the audio decoder  16 , respectively. 
     The video decoder  15  MPEG-decodes the video data in the TS packet delivered from the de-multiplexer  14 . The resultant image signal is delivered to the DRC unit  17 . The DRC unit  17  converts the image signal from the video decoder  15  to a high-quality image signal, which is delivered to the display unit  3 A. Thus, the display unit  3 A displays a high-quality image. 
     The audio decoder  16  MPEG-decodes the audio data in the TS packet delivered from the de-multiplexer  14 . The resultant audio signal is delivered to the speaker  20 , which outputs the audio signal. 
     The image signal output from the video decoder  15  is delivered not only to the DRC unit  17  but also to the motion vector detection unit  41 . The motion vector detection unit  41  detects a motion vector representing full screen motion on a frame basis and delivers it to the drive control unit  42 . 
     The drive control unit  42  drives the actuator  43  on the basis of the motion vector from the motion vector detection unit  41 . Thus, the display panel  3  moves in accordance with the motion vector. 
     Additionally, the drive control unit  42  receives an operation signal from the controller  31 . 
     That is, if a user operates the remote control unit  10  to move the display panel  3 , the light-receiving unit  35  receives an operation signal corresponding to the operation and delivers the operation signal to the remote control I/F  34 . The remote control I/F  34  receives the operation signal from the light-receiving unit  35  and delivers it to the controller  31 . The controller  31  delivers the operation signal from the remote control I/F  34  to the drive control unit  42 . 
     The drive control unit  42  drives the actuator  43  on the basis of the operation signal from the controller  31 . Thus, the display panel  3  moves in accordance with the user operation on the remote control unit  10 . 
       FIG. 9  is a block diagram of the detailed structure of the DRC unit  17  shown in  FIG. 8 . 
     As described above, the DRC unit  17  converts an image signal delivered from the video decoder  15 , which is the first image signal, to a high-quality (high-resolution) image signal (another image signal), which is the second image signal. 
     That is, in the DRC unit  17 , the image signal delivered from the video decoder  15  is supplied to a prediction tap extraction unit  51  and a class tap extraction unit  53  of a classification unit  52  as the first image signal. 
     The prediction tap extraction unit  51  sequentially determines a pixel of interest which forms the second image signal and extracts some of pixels (and pixel values) which form the first image signal and which are used for estimating the pixel value of the pixel of interest. The extracted pixels serve as a prediction tap. 
     More specifically, the prediction tap extraction unit  51  extracts, from the first image signal, a plurality of pixels (and pixel values) which are spatially or temporally located in the vicinity of a pixel in the first image signal that corresponds to the pixel of interest. The extracted pixel values are delivered to a prediction computing unit  56  as a prediction tap. 
     The classification unit  52  includes the class tap extraction unit  53  and a class code generation unit  54 . The classification unit  52  carries out classification of the pixel of interest in accordance with the image signal (the first image signal) from the video decoder  15 . 
     That is, the class tap extraction unit  53  extracts, as a class tap, some of pixels in the first image signal used for the classification in which the pixel of interest is classified into one of a plurality of classes. 
     More specifically, the class tap extraction unit  53  extracts, from the first image signal, a plurality of pixels (and pixel values) which are spatially or temporally located in the vicinity of a pixel in the first image signal that corresponds to the pixel of interest. The extracted pixel values are delivered to the class code generation unit  54  as a class tap. 
     The prediction tap and the class tap may have the same structure. Alternatively, the prediction tap and the class tap may have different structures. 
     The class code generation unit  54  carries out classification in which the pixel of interest is classified into one of a plurality of classes on the basis of the level of the pixels (i.e., pixel values) which are in the class tap from the class tap extraction unit  53  and which are distributed in a spatial or temporal direction in order to generate a class code representing the class of the pixel of interest. The class code is delivered to a coefficient generation unit  55 . 
     Examples of the classification method include a method using the adaptive dynamic range coding (ADRC). 
     In the ADRC method, pixel values of pixels of the class tap is processed using the ADRC to obtain an ADRC code. The class of the pixel of interest is determined in accordance with the obtained ADRC code. 
     In the K-bit ADRC, for example, the maximum value MAX and the minimum value MIN of pixel values of pixels of the class tap are detected. DR(=MAX−MIN) is considered to be a local dynamic range of a set. The pixel values of the class tap is re-quantized into K bits on the basis of the dynamic range DR. That is, the minimum value MIN is subtracted from the pixel value of each pixel of the class tap. The resultant value is divided by DR/2 K  (quantization). K-bit pixel values of pixels of the class tap obtained by the above-described computation are arranged in a predetermined order to generate a bit string. This bit string is output as an ADRC code. 
     For example, the class code generation unit  54  performs 1-bit ADRC and outputs the resultant ADRC code to the coefficient generation unit  55  as a class code of the pixel of interest. 
     The coefficient generation unit  55  receives positional information indicating the position of the display panel  3  from the controller  31  as well as the class code from the class code generation unit  54 . That is, as shown in  FIG. 8 , the controller  31  receives the amount of driving the actuator  43  from the drive control unit  42  to determine the position of the display panel  3 . The controller  31  then delivers the positional information indicating the position of the display panel  3  to the coefficient generation unit  55 . 
     Here, the controller  31  considers this position of the display panel  3  to be a default position. The controller  31  then determines the position of the display panel  3  using the amount of driving the actuator  43  and the default position as a reference. The default position of the display panel  3  may be, for example, a position at which the rotation angle of the top panel  2  is zero degree and at which the display panel  3  and the support panel  5  are located at the same position as the support panel  4  secured to the top panel  2 . 
     The coefficient generation unit  55  stores a tap coefficient that is for each class obtained by learning described below and that is for each of a plurality of positions of the display panel  3 . The coefficient generation unit  55  selects a tap coefficient for each class corresponding to the position closest to the position indicated by the positional information delivered from the controller  31 . The coefficient generation unit  55  further selects a tap coefficient for a class corresponding to the class code supplied by the class code generation unit  54  from the tap coefficients for the classes and delivers (outputs) it to the prediction computing unit  56 . 
     As used herein, the term “tap coefficient” refers to a coefficient that is multiplied by input data in a “tap” of a digital filter. 
     The prediction computing unit  56  obtains a prediction tap output from the prediction tap extraction unit  51  and the tap coefficient output from the coefficient generation unit  55 . The prediction computing unit  56  then carries out a predetermined prediction calculation for calculating a prediction value of the actual value of the pixel of interest. Thus, the prediction computing unit  56  calculates a pixel value (prediction value) of the pixel of interest, namely, a pixel value of a pixel of the second image signal. 
     In this embodiment, the coefficient generation unit  55  stores a tap coefficient that is for each class obtained by learning described below and that is for each of a plurality of positions of the display panel  3 . Alternatively, the coefficient generation unit  55  may store a set of tap coefficients for each class independent of the position of the display panel  3  and may deliver the tap coefficients of a class corresponding to the class code delivered from the class code generation unit  54  to the prediction computing unit  56 . 
     Additionally, a DRC unit for audio signals having the same configuration as the DRC unit  17  can be further provided between the audio decoder  6  of the partition TV shown in  FIG. 8  and the speaker  20 . In this case, the newly installed DRC unit for audio signals converts the output of the audio decoder  16 , which is a first audio signal, to a second high-quality (high-fidelity) audio signal to output it to the speaker  20 . 
     The prediction calculation of the prediction computing unit  56  shown in  FIG. 9  and the learning of a tap coefficient used for the prediction calculation are described next. 
     Here, a high-quality (high-resolution) image signal is considered to be a second image signal. The quality (resolution) of the high-resolution image signal is degraded by, for example, filtering using a low pass filter (LPF). Thus, a first image signal having low quality (resolution) is generated. A prediction tap is extracted from the low-resolution image signal. A pixel value of a high-resolution pixel is predicted with a predetermined prediction calculation using the prediction tap and a tap coefficient. 
     For example, if a linear first order prediction calculation is employed as the predetermined prediction calculation, a pixel value y of a high-resolution pixel is obtained by the following linear first order equation: 
                   y   =       ∑     n   =   1     N     ⁢           ⁢   WnXn             (   1   )               
where x n  is an nth pixel of the low-resolution image signal (hereinafter appropriately referred to as a “low-resolution pixel”), which is an element of the prediction tap for the high-resolution pixel value y, and W n  is an nth tap coefficient multiplied by the nth low-resolution pixel value. In equation (1), the prediction tap includes N low-resolution pixels x 1 , x 2 , . . . , x N .
 
     The pixel value y of a high-resolution pixel can be calculated by using a high-order equation higher than second order in place of the first-order equation shown in equation (1). 
     Let the actual pixel value of the high-resolution pixel in the kth sample be y k  and let the prediction value of the actual value y k  obtained by equation (1) be y k ′. The prediction error e k  is expressed as follows:
 
 e   k   =y   k   −y   k ′  (2)
 
     Since the prediction value y k ′ in equation (2) is obtained by equation (1), y k ′ in equation (2) is replaced by equation (1) as follows: 
                     e   k     =       y   k     -     (         ∑     n   =   1     N     ⁢           ⁢   WnXn     ,   k     )               (   3   )               
where x n,k  represents the nth low-resolution pixel in the prediction tap for a high-resolution pixel of the kth sample.
 
     A tap coefficient w n  that makes the prediction error e k  in equation (3) (or equation (2)) zero is the optimum one for predicting the pixel value of high-resolution pixel. However, in general, it is difficult to obtain such tap coefficient w n  for every high-resolution pixel. 
     Therefore, to determine whether the tap coefficient w n  is the optimum one or not, the least-square method, for example, can be employed. In this case, the optimum tap coefficient w n  can be obtained by making a total sum E of the squared errors in the following equation minimum. 
     
       
         
           
             
               
                 
                   E 
                   = 
                   
                     
                       ∑ 
                       
                         k 
                         = 
                         1 
                       
                       K 
                     
                     ⁢ 
                     
                       e 
                       
                         k 
                         2 
                       
                     
                   
                 
               
               
                 
                   ( 
                   4 
                   ) 
                 
               
             
           
         
       
     
     Here, K represents the number of samples of a set of a high-resolution pixel y k  and low-resolution pixels x 1,k , x 2,k , . . . , x N,k  of a prediction tap of the high-resolution pixel y k , namely, the number of training samples. 
     As shown by the following equation (5), the minimum value of the total sum E of the squared errors in equation (4) can be expressed as w n  making the partial-differentiation of the total sum E with respect to w n  zero. 
     
       
         
           
             
               
                 
                   
                     
                       ∂ 
                       E 
                     
                     
                       ∂ 
                       Wn 
                     
                   
                   = 
                   
                     
                       
                         
                           e 
                           1 
                         
                         ⁢ 
                         
                           
                             ∂ 
                             
                               e 
                               1 
                             
                           
                           
                             ∂ 
                             
                               W 
                               n 
                             
                           
                         
                       
                       + 
                       
                         
                           e 
                           2 
                         
                         ⁢ 
                         
                           
                             ∂ 
                             
                               e 
                               2 
                             
                           
                           
                             ∂ 
                             
                               W 
                               n 
                             
                           
                         
                       
                       + 
                       … 
                       + 
                       
                         
                           e 
                           k 
                         
                         ⁢ 
                         
                           
                             ∂ 
                             
                               e 
                               k 
                             
                           
                           
                             ∂ 
                             
                               w 
                               n 
                             
                           
                         
                       
                     
                     = 
                     
                       0 
                       ⁢ 
                       
                         ( 
                         
                           
                             n 
                             = 
                             1 
                           
                           , 
                           2 
                           , 
                           
                               
                           
                           ⁢ 
                           … 
                           ⁢ 
                           
                               
                           
                           , 
                           N 
                         
                         ) 
                       
                     
                   
                 
               
               
                 
                   ( 
                   5 
                   ) 
                 
               
             
           
         
       
     
     When the above-described equation (3) is partially differentiated with respect to the tap coefficient w n , the following equation is obtained. 
     
       
         
           
             
               
                 
                   
                     
                       
                         ∂ 
                         
                           e 
                           k 
                         
                       
                       
                         ∂ 
                         
                           w 
                           1 
                         
                       
                     
                     = 
                     
                       
                         
                           - 
                           
                             x 
                             
                               1 
                               , 
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                               , 
                             
                           
                         
                         ⁢ 
                         
                           
                             ∂ 
                             
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                               k 
                             
                           
                           
                             ∂ 
                             
                               w 
                               2 
                             
                           
                         
                       
                       = 
                       
                         
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                             x 
                             
                               2 
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                         ⁢ 
                         … 
                       
                     
                   
                   ⁢ 
                   
                       
                   
                   , 
                   
                     
                       
                         ∂ 
                         
                           e 
                           k 
                         
                       
                       
                         ∂ 
                         
                           w 
                           n 
                         
                       
                     
                     = 
                     
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                             N 
                             , 
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                         ⁡ 
                         
                           ( 
                           
                             
                               k 
                               = 
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                             , 
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                           ) 
                         
                       
                     
                   
                 
               
               
                 
                   ( 
                   6 
                   ) 
                 
               
             
           
         
       
     
     Equations (5) and (6) give the following equation. 
     
       
         
           
             
               
                 
                   
                     
                       
                         ∑ 
                         
                           k 
                           = 
                           1 
                         
                         K 
                       
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       
                         
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                           k 
                         
                         ⁢ 
                         
                           x 
                           
                             1 
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                     = 
                     0 
                   
                   , 
                   
                     
                       
                         ∑ 
                         
                           k 
                           = 
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                         K 
                       
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       
                         
                           e 
                           k 
                         
                         ⁢ 
                         
                           x 
                           
                             2 
                             , 
                             k 
                           
                         
                       
                     
                     = 
                     0 
                   
                   , 
                   
                     
                       ⋯ 
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       
                         
                           ∑ 
                           
                             k 
                             = 
                             1 
                           
                           K 
                         
                         ⁢ 
                         
                             
                         
                         ⁢ 
                         
                           
                             e 
                             k 
                           
                           ⁢ 
                           
                             x 
                             
                               N 
                               , 
                               k 
                             
                           
                         
                       
                     
                     = 
                     0 
                   
                   , 
                 
               
               
                 
                   ( 
                   7 
                   ) 
                 
               
             
           
         
       
     
     By substituting equation. (3) for e k  in equation (7), equation (7) can be rewritten as the normal equation (8). 
     
       
         
           
             
               
                 
                   
                     
                       [ 
                       
                         
                           
                             
                               ( 
                               
                                 
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                                     ∑ 
                                     
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                                       = 
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                                     ⁢ 
                                     
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                                 ( 
                                 
                                   
                                     ∑ 
                                     
                                       k 
                                       = 
                                       1 
                                     
                                     K 
                                   
                                   ⁢ 
                                   
                                     
                                       x 
                                       
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                                     ⁢ 
                                     
                                       y 
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                                 ) 
                               
                             
                           
                         
                         ] 
                       
                     
                   
                 
               
               
                 
                   ( 
                   8 
                   ) 
                 
               
             
           
         
       
     
     The normal equation in equation (8) can be solved by using a sweep method (Gauss-Jordan Elimination) with respect to the tap coefficient w n . 
     By solving the normal equation for each class, the optimum tap coefficient w n  (tap coefficient that minimizes the total sum E of the squared errors) can be obtained for each class. 
       FIG. 10  is a block diagram of the configuration of a learning apparatus for learning to find the tap coefficient w n  for each class by generating a normal equation shown by equation (8). 
     The learning apparatus inputs a training image signal used for learning the tap coefficient w n . For example, a high-resolution and high-quality image signal can be used as the training image signal. 
     In the learning apparatus, the training image signal is delivered to a teacher data generation unit  101  and a student data generation unit  103 . 
     The teacher data generation unit  101  generates teacher data, which is a teacher or an answer of the learning process, from the supplied training image signal and delivers the teacher data to a teacher data storing unit  102 . That is, the teacher data generation unit  101  directly delivers the high-quality image signal serving as the training image signal to the teacher data storing unit  102  as the teacher data. Alternatively, the teacher data generation unit  101  converts the contrast of the high-quality image signal and delivers the contrast-converted high-quality image signal to the teacher data storing unit  102  as the teacher data. 
     The teacher data storing unit  102  stores the high-quality image signal delivered from the teacher data generation unit  101  as teacher data. 
     The student data generation unit  103  generates student data, which is a student of the learning process, from the training image signal and delivers the student data to a student data storing unit  104 . That is, the student data generation unit  103  filters the high-quality image signal serving as the training image signal to decrease the resolution of the high-quality image signal. The generated low-quality image signal is delivered to the student data storing unit  104  as student data. 
     The student data storing unit  104  stores the student data delivered from the student data generation unit  103 . 
     A prediction tap extraction unit  105  sequentially determines a pixel of the high-quality image signal serving as the teacher data stored in the teacher data storing unit  102  to be a pixel of interest and then extracts predetermined pixels from among low-resolution pixels of a low-quality image signal serving as the student data stored in the student data storing unit  104 . Thus, the prediction tap extraction unit  105  generates a prediction tap having the same structure as that from the prediction tap extraction unit  51  shown in  FIG. 9  and delivers the prediction tap to an addition unit  108 . 
     A class tap extraction unit  106  extracts predetermined low-resolution pixels of the low-quality image signal serving as the student data stored in the student data storing unit  104  with respect to the pixel of interest. Thus, the class tap extraction unit  106  generates a class tap having the same structure as that from the class tap extraction unit  53  shown in  FIG. 9  and delivers the prediction tap to a class code generation unit  107 . 
     The class code generation unit  107  carries out classification the same as that carried out by the class code generation unit  54  shown in  FIG. 9  on the basis of the class tap output from the class tap extraction unit  106 . The class code generation unit  107  then outputs a class code corresponding to the obtained class to the addition unit  108 . 
     The addition unit  108  reads out the pixel value of the pixel of interest from the teacher data storing unit  102  and adds the pixel of interest to the student data of the prediction tap generated for the pixel of interest supplied from the prediction tap extraction unit  105  for each class code delivered from the class code generation unit  107 . 
     That is, the teacher data y k  stored in the teacher data storing unit  102 , the prediction tap x n,k  output from the prediction tap extraction unit  105 , and the class code output from the class code generation unit  107  are supplied to the addition unit  108 . 
     Thereafter, the addition unit  108  performs a calculation of a matrix in the left-hand side of equation (8), in which the student data are multiplied (x n,k x n′,k ) and summated (Σ) using the prediction tap (student data) x n,k  for each class corresponding to the class code supplied from the class code generation unit  107 . 
     Furthermore, for each class corresponding to the class code supplied from the class code generation unit  107 , the addition unit  108  performs a calculation of a vector in the right-hand side of equation (8), in which the student data x n,k  and the teacher data y k  are multiplied (x n,k y k ) and summated (Σ) using the prediction tap (student data) x n,k  and the teacher data y k . 
     That is, the addition unit  108  stores a component (Σx n,k x n′,k ) of the matrix in the left-hand side of equation (8) and a component (Σx n,k y k ) of the vector in the right-hand side of equation (8) obtained for the teacher data which was previously determined to be a pixel of interest in the internal memory thereof (not shown). 
     Thereafter, the addition unit  108  adds the corresponding component x n,k+1 x n′,k+1  calculated by using student data x n,k+1  of a prediction tap for the newly determined pixel of interest to the component (Σx n,k x n′,k ) of the matrix in the left-hand side of equation (8). That is, the addition represented by the summation in the left-hand side of equation (8) is performed. 
     Furthermore, the addition unit  108  adds the corresponding component x n,k+1 x n′,k+1  calculated by using teacher data y k+1  and student data x n,k+1  of a prediction tap for the teacher data of the newly determined pixel of interest to the component (Σx n,k y k ) of the vector in the right-hand side of equation (8). That is, the addition represented by the summation in the right-hand side of equation (8) is performed. 
     The addition unit  108  then performs the above-described addition while determining all of the teacher data stored in the teacher data storing unit  102  to be pixels of interest to generate the normal equation shown by equation (8) for each class. The addition unit  108  delivers the normal equation to a tap coefficient computing unit  109 . 
     The tap coefficient computing unit  109  solves the normal equation for each class and obtains the optimum tap coefficient W n  to output it. 
     The coefficient generation unit  55  stores the obtained tap coefficient W n  for each class. 
     In the above-described method, the training image signal or the training image signal having converted contrast is used as teacher data corresponding to the second image signal. In addition, a low-resolution image signal generated from the training image signal by degrading the resolution is used as student data corresponding to the first image signal. A tap coefficient is then trained with these data. Thus, a tap coefficient can be obtained that can provide image conversion from the first signal to the second signal while improving the resolution. 
     Here, by changing the selection of student data corresponding to the first image signal and teacher data corresponding to the second image signal, tap coefficients for a variety of image conversion processes can be obtained. 
     That is, for example, high-resolution image data is used as teacher data and image data generated from the high-resolution image data serving as the teacher data by adding noise is used as student data. A tap coefficient is then trained with these data. Thus, a tap coefficient can be obtained that can provide image conversion from a first signal to a second signal while removing or reducing noise from the first data. 
     The process of the learning apparatus shown in  FIG. 10  (i.e., learning process) is described with reference to  FIG. 11  when a tap coefficient for each class is trained with respect to a given position in the display panel  3 . 
     At step S 1 , the teacher data generation unit  101  and the student data generation unit  103  generate and output teacher data and student data from a training image signal, respectively. That is, the teacher data generation unit  101  directly outputs the training image signal as the teacher data. Alternatively, the teacher data generation unit  101  converts the contrast of the training image signal and outputs the converted training image signal as the teacher data. Additionally, the student data generation unit  103  filters the training image signal with a LPF having a predetermined cutoff frequency to generate student data for the teacher data (training image signal) in each frame (or field) and outputs it. 
     The teacher data output from the teacher data generation unit  101  is delivered to the teacher data storing unit  102  to be stored. The student data from the student data generation unit  103  is delivered to the student data storing unit  104  to be stored. 
     Subsequently, the process proceeds to step S 2 , where the prediction tap extraction unit  105  selects a pixel of interest from among the teacher data stored in the teacher data storing unit  102  and previously not selected as a pixel of interest. Furthermore, at step S 2 , the prediction tap extraction unit  105  generates a prediction tap for the pixel of interest from the student data stored in the student data storing unit  104  and delivers the prediction tap to the addition unit  108 . At the same time, the class tap extraction unit  106  generates a class tap for the pixel of interest from the student data stored in the student data storing unit  104  and delivers the prediction tap to the class code generation unit  107 . 
     Thereafter, the process proceeds to step S 3 . The class code generation unit  107  classifies the pixel of interest on the basis of the class tap for the pixel of interest. The class code generation unit  107  then outputs a class code obtained by the classification to the addition unit  108 . The process then proceeds to step S 4 . 
     At step S 4 , the addition unit  108  reads the pixel of interest out of the teacher data storing unit  102 . The addition unit  108  then performs the addition shown by equation (8) for the student data of the prediction tap generated for the pixel of interest and delivered from the prediction tap extraction unit  105 . The addition is performed for each class code supplied from the class code generation unit  107 . The process then proceeds to step S 5 . 
     At step S 5 , the prediction tap extraction unit  105  determines whether the teacher data that does not become a pixel of interest is still stored in the teacher data storing unit  102 . If it is determined at step S 5  that the teacher data that does not become a pixel of interest is still stored in the teacher data storing unit  102 , the prediction tap extraction unit  105  defines the teacher data that does not become a pixel of interest as a new pixel of interest. The process then returns to step S 2 . Thereafter, the same subsequent processes are repeated. 
     However, if it is determined at step S 5  that no teacher data that does not become a pixel of interest is stored in the teacher data storing unit  102 , the addition unit  108  delivers the obtained matrix in the left-hand side of equation (8) for each class and the obtained vector in the right-hand side of equation (8) to the tap coefficient computing unit  109 . The process then proceeds to step S 6 . 
     At step S 6 , the tap coefficient computing unit  109  solves the normal equation for each class, which is generated from the matrix in the left-hand side and the vector in the right-hand side for each class, to acquire a tap coefficient w n  for each class. The tap coefficient computing unit  109  then outputs the tap coefficient w n . Thus, the process is completed. 
     For some classes, it may be difficult to generate the normal equations sufficient to obtain a tap coefficient due to, for example, the lack of the number of training image signals. For such classes, the tap coefficient computing unit  109 , for example, outputs a predetermined tap coefficient. 
     In the learning apparatus shown in  FIG. 10 , the teacher data generation unit  101  generates teacher data of a plurality of contrasts (M types of contrast). A tap coefficient for each class is obtained for each of the teacher data of M types of contrast. That is, in the learning apparatus shown in  FIG. 10 , a tap coefficient for each class is obtained for each of M types of contrast. 
       FIG. 12  illustrates a block diagram of the coefficient generation unit  55  shown in  FIG. 9 . 
     The positional information indicating the position of the display panel  3  is delivered from the controller  31  and is input to a switch control circuit  71 . 
     The switch control circuit  71  controls switches  72  and  73  in response to the positional information delivered from the controller  31 . That is, the switch control circuit  71  controls the switches  72  and  73  to select a coefficient generation circuit corresponding to the position indicated by the positional information delivered from the controller  31  from among coefficient generation circuits  81   1  to  81   M . 
     A coefficient generation circuit  81   m  (m=1, 2, . . . , M) stores a tap coefficient for each class for an mth contrast among tap coefficients for each class of M types of contrast. 
     When the coefficient generation circuit  81   m  is selected by the switches  72  and  73 , the coefficient generation circuit  81   m  receives a class code from the class code generation unit  54  (see  FIG. 9 ) via the switch  72 . The coefficient generation circuit  81   m  selects a tap coefficient of a class corresponding to the class code delivered from the class code generation unit  54  from among the stored tap coefficients for each class. The coefficient generation circuit  81   m  then delivers (outputs) the selected tap coefficient to the prediction computing unit  56  via the switch  73 . 
     In the partition TV, regional information about the region where the partition TV is installed is set by a user, for example, immediately after the user purchases the partition TV. Thus, the initial setting is performed in which, for example, a frequency band for each channel received by the tuner  11  is set. Additionally, in this initial setting, for example, each of the coefficient generation circuits  81   1  to  81   M  is associated with a position of the display panel  3 . 
     More specifically, in the partition TV, for example, the display panel  3  is sequentially moved to M number of positions. At each of the M number of positions, the DRC unit  17  displays images obtained by using the tap coefficients stored in the coefficient generation circuits  81   1  to  81   M  on the display unit  3 A of the display panel  3 . At each of the M number of positions of the display panel  3 , the user observes the images displayed on the display unit  3 A of the display panel  3  to select the most desirable image. Thereafter, at each of the M number of positions of the display panel  3 , the tap coefficient (i.e., a coefficient generation circuit  81   m  storing the tap coefficient) used for generating the image selected by the user is associated with the position of the display panel  3  displaying the image. 
     After the above-described initial setting, the switch control circuit  71  causes the switches  72  and  73  to select, from among M coefficient generation circuits  81   1  to  81   M , a coefficient generation circuit  81   m  storing the tap coefficient associated with the position closest to the position indicated by the positional information delivered by the controller  31 . The coefficient generation circuit  81   m  selected by the switches  72  and  73  then selects, from among the stored tap coefficients for classes, a tap coefficient corresponding to the class code supplied from the class code generation unit  54  and delivers the selected tap coefficient to the prediction computing unit  56 . 
     The image conversion process of the DRC unit  17  shown in  FIG. 9  is described next with reference to a flow chart in  FIG. 13 , in which an image signal (a first image signal) output from the video decoder  15  is converted to a high-quality (high-resolution) image signal (a second image signal). 
     At step S 11 , the prediction tap extraction unit  51  selects a pixel of interest from among pixels of the second image data previously not selected as a pixel of interest. Furthermore, the prediction tap extraction unit  51  extracts some of pixels (and pixel values thereof) of the first image signal used for predicting the pixel value of the pixel of interest as a prediction tap. The prediction tap extraction unit  51  also delivers the extracted prediction tap to the prediction computing unit  56 . The process then proceeds to step S 12 . Here, the prediction tap extraction unit  51 , for example, selects a pixel of the second image signal as a pixel of interest in an order of raster scanning. 
     At step S 12 , the class tap extraction unit  53  extracts some of pixels of the first image signal used for classifying the pixel of interest into one of classes as a class tap. The class tap extraction unit  53  then delivers the obtained class tap to the class code generation unit  54 . The process then proceeds to step S 13 . 
     At step S 13 , the class code generation unit  54  classifies the pixel of interest on the basis of a pixel value (level) of a pixel of the class tap from the class tap extraction unit  53 . The class code generation unit  54  generates a class code for the class obtained from the classification. The class code generation unit  54  then delivers the class code to the coefficient generation unit  55 . Thereafter, the process proceeds to step S 14 . 
     At step S 14 , the switch control circuit  71  of the coefficient generation unit  55  (see  FIG. 12 ) recognizes the position of the display panel  3 . That is, the switch control circuit  71  receives the positional information delivered from the controller  31  (see  FIG. 8 ) and recognizes the position of the display panel  3  indicated by the positional information. 
     The process proceeds from step S 14  to step S 15 . The switch control circuit  71  selects, from among the M coefficient generation circuits  81   1  to  81   M , the coefficient generation circuit  81   m  corresponding to the position of the display panel  3  recognized from the positional information delivered from the controller  31 . The process then proceeds to step S 16 . At step S 16 , the coefficient generation circuit  81   m  selected by the switch control circuit  71  delivers (outputs) the tap coefficient of the class corresponding to the class code delivered from the class code generation unit  54  to the prediction computing unit  56 . The process then proceeds to step S 17 . 
     At step S 17 , the prediction computing unit  56  receives the prediction tap output from the prediction tap extraction unit  51  and the tap coefficient output from the coefficient generation unit  55  and performs a prediction calculation for equation (1) which finds a prediction value of the actual value of the pixel of interest using the prediction tap and the tap coefficient. Thus, the prediction computing unit  56  outputs the pixel value (the prediction value of the pixel value) of the pixel of interest, namely, the pixel value of the pixel of the second image signal. 
     In the image conversion process shown in  FIG. 13 , pixels of the second image signal are sequentially selected as a pixel of interest. 
     Subsequently, since, as described above, the partition TV (see  FIG. 8 ) functions as both an apparatus for displaying an image and a partition, the partition TV provides the following two operation modes: a display mode in which the partition TV functions as an apparatus for displaying an image; and a partition mode in which the partition TV functions as a partition. 
     The remote control unit  10  (see  FIG. 8 ) of the partition TV includes at least a “TV” switch operated for changing the display mode to active or inactive and a “furniture” switch operated for changing the partition mode to active or inactive. 
     The operation of the partition TV is described next with reference to flow charts in  FIGS. 14 through 17 , in which one of the display mode and partition mode is active or both of the display mode and partition mode are active. 
     As well as the “TV” switch and the “furniture” switch, the remote control unit  10  includes at least a “movement permission” switch and a movement key. The “movement permission” switch is operated to permit or inhibit the movement (rotation) of the display panel  3 . The movement key is operated to indicate the movement direction of the display panel  3 . The movement key for indicating the movement direction can be composed of, for example, a cursor key or a joystick. 
     The operation of the partition TV is described with reference to the flow chart in  FIG. 14  when the “furniture” switch of the remote control unit  10  is turned on to enable the partition mode. 
     When a user desires to use the partition TV as a partition, which is one piece of furniture, the user operates the remote control unit  10  to turn on the “furniture” switch. 
     When the user operates the remote control unit  10  to turn on the “furniture” switch, the remote control I/F  34  receives an operation signal corresponding to the operation via the light-receiving unit  35  of the partition TV (see  FIG. 8 ). The remote control I/F  34  delivers the operation signal received from the remote control unit  10  to the controller  31 . The controller  31  enables the partition mode in response to the operation signal from the remote control unit  10  (for example, enabling information is set to a flag which indicates whether to enable or disable the partition mode and is stored in the EEPROM  31 D). 
     When the partition mode is enabled, the remote control I/F  34 , at step S 31 , determines whether the movement key of the remote control unit  10  is operated. If it is determined at step S 31  that the movement key of the remote control unit  10  is not operated, step S 32  is skipped and the process proceeds to step S 33 . 
     If it is determined at step S 31  that the movement key of the remote control unit  10  is operated, that is, if it is determined that an operation signal corresponding to the operation of the movement key is transmitted by the remote control unit  10  and is received by the remote control I/F  34  via the light-receiving unit  35 , the remote control I/F  34  accepts the operation signal and delivers it to the controller  31 . The process then proceeds to step S 32 . 
     At step S 32 , the controller  31  delivers, to the drive control unit  42 , a control signal instructing the movement of the display panel  3  in response to the operation of the movement key based on the operation signal from the remote control I/F  34 . The drive control unit  42  drives the actuator  43  in response to the control signal from the controller  31 . Thus, the display panel  3  moves in response to the operation of the movement key. 
     That is, since the display panel  3  moves in response to the operation of the movement key, the arrangement of the partition, which is one of the functions of the partition TV, can be changed. 
     The process then proceeds from step S 32  to step S 33 , where the remote control I/F  34  determines whether the “furniture” switch of the remote control unit  10  is operated to turn off. If it is determined at step S 33  that the “furniture” switch is not operated to turn off, the process returns to step S 31 , where the same subsequent processes are repeated. 
     If it is determined at step S 33  that the “furniture” switch is operated to turn off, that is, if it is determined that the user operates the remote control unit  10  to turn off the “furniture” switch and the remote control I/F  34  receives an operation signal corresponding to the operation via the light-receiving unit  35 , the remote control I/F  34  accepts the operation signal and delivers it to the controller  31 . 
     The controller  31  disables the partition mode in response to the operation signal from the remote control unit  10  (for example, disabling information is set to the flag which indicates whether to enable or disable the partition mode). The process is then completed. 
     Thus, when the user turns on the “furniture” switch of the remote control unit  10 , the partition mode is enabled. The partition TV functions as a partition which changes the arrangement thereof in response to the operation of the movement key by the user. 
     The operation of the partition TV is described with reference to the flow chart in  FIG. 15  when the “TV” switch of the remote control unit  10  is turned on to enable the display mode. 
     When a user desires to use the partition TV as a display unit of, for example, a television receiver, the user operates the remote control unit  10  to turn on the “TV” switch. 
     When the user operates the remote control unit  10  to turn on the “TV” switch, the remote control I/F  34  receives an operation signal corresponding to the operation via the light-receiving unit  35  of the partition TV (see  FIG. 8 ). The remote control I/F  34  delivers the operation signal received from the remote control unit  10  to the controller  31 . The controller  31  enables the display mode in response to the operation signal from the remote control unit  10  (for example, enabling information is set to a flag which indicates whether to enable or disable the partition mode and is stored in the EEPROM  31 D). 
     When the display mode is enabled, an image is displayed on the display unit  3 A of the display panel  3  and the corresponding sound is output from the speaker  20 . 
     That is, in the partition TV, the tuner  11  selects a transport stream of a specific channel (frequency range) from among transport streams of a digital broadcast received by an antenna. The selected transport stream is delivered to the de-multiplexer  14  via the demodulation unit  12  and the error correction processing unit  13 . The de-multiplexer  14  selects a TS packet of a specific program from the delivered transport stream under the control of the controller  31 . The de-multiplexer  14  delivers the TS packet of video data and the TS packet of audio data to the video decoder  15  and the audio decoder  16 , respectively. 
     The video decoder  15  MPEG-decodes the TS packet of video data delivered from the de-multiplexer  14 . The resultant image signal is delivered to the DRC unit  17  and the motion vector detection unit  41 . The DRC unit  17  converts the image signal from the video decoder  15  to a high-quality image signal and delivers the converted signal to the display unit  3 A. Thus, the display unit  3 A can display a high-resolution image. 
     The audio decoder  16  MPEG-decodes the TS packet of audio data delivered from the de-multiplexer  14 . The resultant audio signal is delivered to the speaker  20 , which outputs the corresponding sound. 
     As described above, when the “TV” switch is turned on to enable the display mode, the partition TV outputs images and sounds of the program. That is, the partition TV functions as a display unit of, for example, a television receiver which displays images and outputs the corresponding sound. Thus, a user can watch a television program. Accordingly, the “TV” switch corresponds to a power switch of a television receiver. 
     When the display mode is enabled, the controller  31 , at step S 41 , determines whether the movement of the display panel  3  is permitted. If it is determined at step S 41  that the movement of the display panel  3  is permitted, that is, for example, if permitting information is set to a flag which is stored in the EEPROM  31 D and which indicates whether to permit or inhibit the movement of the display panel  3 , the process proceeds to step S 42 . 
     At step S 42 , information is set to the flag which indicates whether to permit or inhibit the movement of the display panel  3  depending on the operation of a “movement permission” switch of the remote control unit  10 . 
     That is, when the user operates the “movement permission” switch of the remote control unit  10  to permit the movement of the display panel  3 , an operation signal corresponding to the operation is transmitted from the remote control unit  10  and is received by the remote control I/F  34  via the light-receiving unit  35 . The remote control I/F  34  accepts the operation signal and delivers it to the controller  31 . The controller  31  sets permitting information to the flag which indicates whether to permit or inhibit the movement of the display panel  3  depending on the operation signal from the remote control unit  10 . 
     In contrast, when the user operates the “movement permission” switch of the remote control unit  10  to inhibit the movement of the display panel  3 , an operation signal corresponding to the operation is transmitted by the remote control unit  10  and is received by the remote control I/F  34  via the light-receiving unit  35 . The remote control I/F  34  accepts the operation signal and delivers it to the controller  31 . The controller  31  sets inhibiting information to the flag which indicates whether to permit or inhibit the movement of the display panel  3  depending on the operation signal from the remote control unit  10 . 
     At step S 42 , the motion vector detection unit  41  detects a motion vector representing full screen motion on a frame basis from the image signal delivered from the video decoder  15 . The motion vector detection unit  41  then delivers the motion vector to the drive control unit  42 . The process then proceeds to step S 43 . 
     At step S 43 , the drive control unit  42  drives the actuator  43  in accordance with the motion vector from the motion vector detection unit  41 , so that the display panel  3  moves in accordance with the image signal delivered from the video decoder  15 , namely, the motion of the image displayed on the display unit  3 A of the display panel  3 . 
     That is, when an image captured by, for example, a horizontally panning camera is displayed on the display unit  3 A of the display panel  3 , the display panel  3  horizontally moves in the same direction as the panning direction. The image displayed on the display unit  3 A of the display panel  3  changes in response to the movement of the display panel  3 . 
     Accordingly, in this case, the user has a sensation that the display unit  3 A of the display panel  3  is a “moving window” and that the user observes the real scenes through the window. 
     The motion vector detected by the motion vector detection unit  41  from the image signal output from the video decoder  15  represents the motion of the entire image, which is obtained in such a case when the image is captured while a camera is panning, that is, represents the motion of the camera. Accordingly, for example, when a fixed camera captures an image of a motor vehicle passing through with a stationary background, the motion of the entire image does not exist. Therefore, the motion vector detection unit  41  detects a motion vector of zero. In this case, the display panel  3  does not move. However, the display panel  3  can move in accordance with the motion of a partial image instead of the motion of the entire image. 
     If it is determined at step S 41  that the movement of the display panel  3  is not permitted, that is, for example, if inhibiting information is set to the flag of the EEPROM  31 D which indicates whether to permit or inhibit the movement of the display panel  3 , the process skips steps S 42  and S 43  and proceeds to step S 44 . 
     Accordingly, if the movement of the display panel  3  is not permitted, the display panel  3  does not move in accordance with the motion of the image displayed on the display unit  3 A. 
     At step S 44 , the remote control I/F  34  determines whether the “TV” switch of the remote control unit  10  is operated to turn off. If it is determined at step S 44  that the “TV” switch is not operated to turn off, the process returns to step S 41 , where the same subsequent processes are repeated. 
     If it is determined at step S 44  that the “TV” switch is operated to turn off, that is, if it is determined that the user operates the remote control unit  10  to turn off the “TV” switch and the remote control I/F  34  receives an operation signal corresponding to the operation via the light-receiving unit  35 , the remote control I/F  34  accepts the operation signal and delivers it to the controller  31 . 
     The controller  31  disables the display mode in response to the operation signal from the remote control unit  10  (for example, disabling information is set to the flag which indicates whether to enable or disable the display mode). In addition, the controller  31  stops displaying the image on the display unit  3 A of the display panel  3  and stops outputting the sound from the speaker  20 . The process is then completed. 
     Thus, when the user turns on the “TV” switch of the remote control unit  10 , the display mode is enabled. The partition TV functions as a display apparatus. Furthermore, if the movement of the display panel  3  is permitted, the display panel  3  moves in accordance with the motion of an image displayed on the display unit  3 A of the display panel  3 . 
     When the partition mode is enabled, the partition TV functions as a partition, as described above. Accordingly, the user can use the partition TV as a partition. When the display mode is enabled, the partition TV functions as a display apparatus, as described above. Accordingly, the user can use the partition TV as a display apparatus. 
     However, the user could possibly desire to use the partition TV as a display apparatus while they use the partition TV as a partition. Conversely, the user could possibly desire to use the partition TV as a partition while they use the partition TV as a display apparatus. 
     The operation of the partition TV is described below when both partition mode and display mode are enabled. 
     The operation of the partition TV is described next with reference to the flow chart in  FIG. 16  when the “furniture” switch of the remote control unit  10  is turned on to enable the partition mode and subsequently the “TV” switch of the remote control unit  10  is turned on to enable the display mode. 
     When the user operates the remote control unit  10  to turn on the “furniture” switch, the controller  31  enables the partition mode, as shown in  FIG. 14 . 
     When the partition mode is enabled, the same processes as those at steps S 31  through S 33  are executed at steps S 51  through S 56 . 
     That is, as at the step S 31  shown in  FIG. 14 , the remote control I/F  34 , at step S 51 , determines whether the movement key of the remote control unit  10  is operated. If it is determined at step S 51  that the movement key of the remote control unit  10  is not operated, step S 52  is skipped and the process proceeds to step S 53 . 
     If it is determined at step S 51  that the movement key of the remote control unit  10  is operated, the process proceeds to step S 52 . As at step S 32  shown in  FIG. 14 , the controller  31  delivers a control signal instructing the movement of the display panel  3  in accordance with the operation of the movement key based on the operation signal to the drive control unit  42 . The drive control unit  42  drives the actuator  43  in response to the control signal from the controller  31 . Thus, the display panel  3  moves in response to the operation of the movement key. 
     The process proceeds from step S 52  to step S 53 . As at step S 33  shown in  FIG. 14 , the remote control I/F  34  determines whether the “furniture” switch of the remote control unit  10  is operated to turn off. If it is determined at step S 53  that the “furniture” switch is operated to turn off, the controller  31  disables the partition mode and terminates the process. 
     If it is determined at step S 53  that the “furniture” switch is not operated to turn off, the process proceeds to step S 54 , where the controller  31  determines whether the “TV” switch is operated to turn on. 
     If it is determined at step S 54  that the “TV” switch is not operated to turn on, the process returns to step S 51 , where the same subsequent processes are repeated. 
     However, if it is determined at step S 54  that the “TV” switch is operated to turn on, that is, if it is determined that the user operates the remote control unit  10  to turn on the “TV” switch and an operation signal corresponding to the operation is transmitted from the remote control unit  10  and is received by the remote control I/F  34  via the light-receiving unit  35 , the remote control I/F  34  accepts the operation signal and delivers it to the controller  31 . The controller  31  enables the display mode in response to the operation signal from the remote control unit  10 . Thus, as shown in  FIG. 15 , an image is displayed on the display unit  3 A of the display panel  3  and the corresponding sound is output from the speaker  20 . 
     As described above, when the partition mode is enabled and subsequently the display mode is enabled at step S 54 , the process proceeds to step S 55 . At step S 55 , the controller  31  stores positional information indicating the current position of the display panel  3 . 
     That is, as shown in  FIG. 9 , the controller  31  receives the driving amount of the actuator  43  from the drive control unit  42  to determine the position of the display panel  3 . The controller  31  then stores the determined positional information indicating the current position of the display panel  3  at step S 55 . 
     Additionally, at step S 55 , the controller  31  delivers a control signal to instruct the drive control unit  42  to move the display panel  3  to the default position. The drive control unit  42  drives the actuator  43  in response to the control signal from the controller  31 . Thus, the display panel  3  moves to the default position. 
     After the process at step S 55  is performed, the same processes as those at step S 41  through S 44  in  FIG. 15  are executed at step S 56  through S 59 , respectively. 
     That is, as at step S 41  shown in  FIG. 15 , the controller  31 , at step S 56 , determines whether the movement of the display panel  3  is permitted or not. If it is determined at step S 56  that the movement of the display panel  3  is permitted, the process proceeds to step S 57 , where, as at step S 42  shown in  FIG. 15 , the motion vector detection unit  41  detects a motion vector representing a full screen motion on a frame basis from the image signal delivered from the video decoder  15 . The motion vector detection unit  41  then delivers the motion vector to the drive control unit  42 . The process then proceeds to step S 58 . 
     At step S 58 , as at step S 43  shown in  FIG. 15 , the drive control unit  42  drives the actuator  43  in response to the control signal from the controller  3 . The process then proceeds to step S 59 . Thus, the display panel  3  moves in accordance with the image signal delivered from the video decoder  15 , namely, the motion of the image displayed on the display unit  3 A of the display panel  3 . 
     In this case, the display panel  3  moves to the default position at step S 55 . Accordingly, at step S 58 , the display panel  3  moves in accordance with (based on) the motion of the image displayed on the display unit  3 A of the display panel  3  using the default position as a reference. 
     In contrast, if it is determined at step S 56  that the movement of the display panel  3  is not permitted, the process skips steps S 57  and S 58  and proceeds to step S 59 . As at step S 44  shown in  FIG. 15 , the remote control I/F  34  determines whether the “TV” switch of the remote control unit  10  is operated to turn off. If it is determined at step S 59  that the “TV” switch is not operated to turn off, the process returns to step S 56 , where the same subsequent processes are repeated. 
     If it is determined at step S 59  that the “TV” switch is operated to turn off, the controller  31  disables the display mode. That is, the state in which both partition mode and display mode are enabled is changed to a state in which only the partition mode is enabled. In addition, the display of an image on the display unit  3 A of the display panel  3  and the output of sound from the speaker  20  are stopped. The process then proceeds to step S 60 . 
     At step S 60 , the controller  31  delivers, to the drive control unit  42 , a control signal to instruct the drive control unit  42  to move the display panel  3  to the position indicated by the positional information stored at step S 55 , namely, the position when the display mode is enabled. The drive control unit  42  drives the actuator  43  in response to the control signal from the controller  31 . Thus, the display panel  3  moves to the position when the display mode is enabled (i.e., the original position). 
     After the process at step S 60  is performed, the process returns to step S 51 , where the same subsequent processes are repeated. 
     When the partition mode is enabled and subsequently the display mode becomes enabled at step S 54 , the processes from step S 56  through step S 59  are repeated, as shown in  FIG. 16 , unless the display mode is disabled. If the display mode is disabled, the process of step S 60  is performed. The process then returns to step S 51 . 
     In contrast, when the partition mode is enabled and subsequently the display mode becomes enabled at step S 54  and when the display mode is not disabled and the partition mode becomes disabled during the repetitive process from step S 56  through step S 59 , that is, when only the display mode becomes enabled, the processes from step S 56  through step S 59  are repeated, as shown in  FIG. 16 , the partition TV terminates the process of the flow chart shown in  FIG. 16  and starts the process of the flow chart shown in  FIG. 15 . 
     Additionally, in  FIG. 16 , when the partition mode is enabled and subsequently the display mode becomes enabled at step S 54  and when, at step S 55 , the display panel  3  is moved to the default position and then, at step S 59 , the display mode becomes disabled, the display panel  3  moves (returns) to the position at which the display mode was enabled. However, the processes of steps S 55  and S 60  may be skipped, that is, the processes of steps S 55  and S 60  need not be performed. 
     If the processes of steps S 55  and S 60  are skipped, the partition mode is enabled. Subsequently, when the display mode becomes enabled at step S 54 , the display panel  3  starts to move in accordance with the motion of an image displayed on the display unit  3 A at step S 58  if the movement of the display panel  3  is permitted. Accordingly, in this case, the display panel  3  moves in accordance with the motion of an image displayed on the display unit  3 A using the position at which the display mode was enabled as a reference instead of using the default position as a reference. 
     Subsequently, when the display mode becomes disabled at step S 59 , the process of step S 60  is skipped and the process returns to step S 51 . If the user operates the movement key of the remote control unit  10 , the display panel  3 , at step S 52 , moves in response to the operation of the movement key. Accordingly, in this case, the display panel  3  moves in accordance with the operation of the movement key using the position at which the display mode was disabled as a reference. 
     The operation of the partition TV is described next with reference to the flow chart in  FIG. 17  when the “TV” switch of the remote control unit  10  is turned on to enable the display mode and subsequently the “furniture” switch of the remote control unit  10  is turned on to enable the partition mode. 
     When the user operates the remote control unit  10  to turn on the “TV” switch, the controller  31  enables the display mode, as shown in  FIG. 15 . Thus, as shown in  FIG. 15 , an image is displayed on the display unit  3 A of the display panel  3  and the corresponding sound is output from the speaker  20 . 
     After the display mode is enabled, the same processes as those at step S 41  through S 44  in  FIG. 15  are executed at step S 81  through S 84 , respectively. 
     That is, as at step S 41  shown in  FIG. 15 , the controller  31 , at step S 81 , determines whether the movement of the display panel  3  is permitted or not. If it is determined at step S 81  that the movement of the display panel  3  is permitted, the process proceeds to step S 82 , where, as at step S 42  shown in  FIG. 15 , the motion vector detection unit  41  detects a motion vector representing a full screen motion on a frame basis from the image signal delivered from the video decoder  15 . The motion vector detection unit  41  then delivers the motion vector to the drive control unit  42 . The process then proceeds to step S 83 . 
     At step S 83 , as at step S 43  shown in  FIG. 15 , the drive control unit  42  drives the actuator  43  in response to the control signal from the controller  31 . The process then proceeds to step S 84 . Thus, the display panel  3  moves in accordance with the image signal delivered from the video decoder  15 , namely, the motion of the image displayed on the display unit  3 A of the display panel  3 . 
     In contrast, if it is determined at step S 81  that the movement of the display panel  3  is not permitted, the process skips steps S 82  and S 83  and proceeds to step S 84 . As at step S 44  shown in  FIG. 15 , the remote control I/F  34  determines whether the “TV” switch of the remote control unit  10  is operated to turn off. If it is determined at step S 84  that the “TV” switch is operated to turn off, the controller  31  disables the display mode and stops the display of an image on the display unit  3 A of the display panel  3  and the output of sound from the speaker  20 . The process is then completed. 
     If it is determined at step S 84  that the “TV” switch is not operated to turn off, the process proceeds to step S 85 , where the remote control I/F  34  determines whether the “furniture” switch is operated to turn on or not. 
     If it is determined at step S 85  that the “furniture” switch is not operated to turn on, the process returns to step S 81 , where the same subsequent processes are repeated. 
     If it is determined at step S 85  that the “furniture” switch is operated to turn on, that is, if it is determined that the user operates the remote control unit  10  to turn on the “furniture” switch and an operation signal corresponding to the operation is transmitted from the remote control unit  10  and is received by the remote control I/F  34  via the light-receiving unit  35 , the remote control I/F  34  accepts the operation signal and delivers it to the controller  31 . The controller  31  enables the partition mode in response to the operation signal from the remote control unit  10 . 
     Thus, when the display mode is enabled and subsequently the partition mode becomes enabled at step S 85 , the process proceeds to step S 86 , where the controller  31  delivers a control signal to instruct the drive control unit  42  to move the display panel  3  to the default position. The drive control unit  42  drives the actuator  43  in response to the control signal from the controller  31 . Thus, the display panel  3  moves to the default position. 
     In the above-described example, the display panel  3  is moved to the default position at step S 86 . However, at step S 86 , the display panel  3  may be moved to its position immediately before the display mode was enabled. Alternatively, the process at step S 86  may be skipped. 
     After the process at step S 86  is performed, the same processes as those at step S 31  through S 33  in  FIG. 14  are executed at step S 87  through S 89 , respectively. 
     That is, as at step S 31  shown in  FIG. 14 , the remote control I/F  34 , at step S 87 , determines whether the movement key of the remote control unit  10  is operated. If it is determined at step S 87  that the movement key of the remote control unit  10  is not operated, the process skips step S 88  and proceeds to step S 89 . 
     If it is determined at step S 87  that the movement key of the remote control unit  10  is operated, the process proceeds to step S 88 , where, as at step  32  shown in  FIG. 14 , the controller  31  delivers, to the drive control unit  42 , a control signal to instruct the drive control unit  42  to move the display panel  3  to a position in accordance with the operation. The drive control unit  42  drives the actuator  43  in response to the control signal from the controller  31 . Thus, the display panel  3  moves in accordance with the operation of the movement key. 
     The process then proceeds from step S 88  to step S 89 . At step S 89 , as at step S 33  shown in  FIG. 14 , the remote control I/F  34  determines whether the “furniture” switch of the remote control unit  10  is operated to turn off. If it is determined at step S 89  that the “furniture” switch is not operated to turn off, the process returns to step S 87 , where the same subsequent processes are repeated. 
     If it is determined at step S 89  that the “furniture” switch is operated to turn off, the controller  31  disables the partition mode. The process returns to step S 81 , where the same subsequent processes are repeated. 
     When the display mode is enabled and subsequently the partition mode becomes enabled at step S 85 , the processes from step S 87  through step S 89  are repeated, as shown in  FIG. 17 , unless the partition mode is disabled. If the partition mode is disabled, the process returns to step S 81 . 
     In contrast, when the display mode is enabled and subsequently the partition mode becomes enabled at step S 85  and when the partition mode is not disabled and the display mode becomes disabled during the repetitive process from step S 87  through step S 89 , that is, when only the partition mode becomes enabled, the partition TV terminates the process of the flow chart shown in  FIG. 17  and starts the process of the flow chart shown in  FIG. 14 . 
       FIG. 18  illustrates a block diagram of another electrical configuration of the partition TV shown in  FIGS. 1 and 5 . In the drawing, identical elements to those illustrated and described in relation to  FIG. 8  are designated by identical reference numerals, and therefore, the descriptions are not repeated here. That is, the partition TV shown in  FIG. 18  is basically identical to that shown in  FIG. 8  except that the partition TV shown in  FIG. 18  includes no motion vector detection unit  41  and includes a DRC unit  217  in place of the DRC unit  17 . 
     In an image conversion process that converts a first image signal to a second image signal, the DRC unit  17  shown in  FIGS. 8 and 9  carries out a class classification in which the pixel of interest is classed into one of a plurality of classes on the basis of the level of the pixels (i.e., pixel values) which are in the class tap from the class tap extraction unit  53  and which are distributed in a spatial or temporal direction in order to generate a class code representing the class of the pixel of interest. In the image conversion process, the DRC unit  217  shown in  FIG. 18  further detects the motion of an image from the first image signal, which is a target of the image conversion process. The DRC unit  217  carries out the classification also using the result of the detection. 
     That is,  FIG. 19  illustrates the exemplary configuration of the DRC unit  217  shown in  FIG. 18 . In the drawing, identical elements to those illustrated and described in relation to the DRC unit  17  shown in  FIG. 9  are designated by identical reference numerals, and therefore, the descriptions are not repeated here. That is, the DRC unit  217  further includes a motion vector detection unit  301 . The classification unit  52  includes class code generation units  302  and  303  in addition to the class tap extraction unit  53  and the class code generation unit  54 . The other components of the DRC unit  217  are identical to those of the DRC unit  17 . 
     The motion vector detection unit  301  receives an image signal from the video decoder  15  (see  FIG. 18 ), namely, the first signal, which is a target of the image conversion process of the DRC unit  217 . Like the motion vector detection unit  41  shown in  FIG. 8 , the motion vector detection unit  301  detects a motion vector representing a full screen motion on a frame basis from an image signal delivered from the video decoder  15  and delivers the detected motion vector to the class code generation unit  302  of the classification unit  52 . 
     Additionally, the motion vector detection unit  301  delivers the motion vector to the drive control unit  42  shown in  FIG. 18  as well as the class code generation unit  302 . When the display mode is enabled, the drive control unit  42  shown in  FIG. 18  drives the actuator  43  to move the display panel  3  on the basis of the motion vector delivered from the motion vector detection unit  301 . 
     The class code generation unit  302  carries out a class classification in which a pixel of interest is classified into one of a plurality of classes on the basis of a motion vector obtained from, for example, the same frame as that of the pixel of interest among the motion vectors delivered from the motion vector detection unit  301 . Thus, the class code generation unit  302  generates a class code representing the class of the pixel of interest and delivers it to the class code generation unit  303 . The method for carrying out a class classification includes, for example, the following method: a motion vector is vector-quantized. The result of the vector quantization (i.e., a code assigned to a code vector (centroid vector) in the code book used for the vector quantization) is defined as the class code. 
     As used herein, the class code obtained by the class code generation unit  54  performing the class classification on a pixel of interest on the basis of the level of the pixels (i.e., pixel values) which are distributed in a spatial or temporal direction of the class tap is referred to as a “spatial or temporal class code”. Additionally, the class code obtained by the class code generation unit  302  performing the class classification on a pixel of interest on the basis of the motion vector from the motion vector detection unit  301  is referred to as a “motion class code”. 
     The class code generation unit  303  receives the spatial or temporal class code of the pixel of interest from the class code generation unit  54  in addition to the motion class code of the pixel of interest from the class code generation unit  302 . The class code generation unit  303  generates a class code representing the final class of the pixel of interest on the basis of the motion class code of the pixel of interest from the class code generation unit  302  and the spatial or temporal class code of the pixel of interest from the class code generation unit  54 . The class code generation unit  303  then delivers the class code to the coefficient generation unit  55 . 
     That is, for example, the class code generation unit  303  generates, as a class code representing the final class of the pixel of interest, a bit string in which a bit string representing the motion class code is followed by a bit string representing the spatial or temporal class code. 
     Additionally, the coefficient generation unit  55  of the DRC unit  217  shown in  FIG. 19  stores a tap coefficient for each class obtained by performing the same class classification as that performed by the classification unit  52  shown in  FIG. 19 , that is, a tap coefficient for each position among a plurality of positions of the display panel  3 . 
     The image conversion process of the DRC unit  217  shown in  FIG. 19  is described next with reference to a flow chart in  FIG. 20 , in which an image signal (a first image signal) output from the video decoder  15  is converted to a high-quality (high-resolution) image signal (a second image signal). 
     In the DRC unit  217 , the same processes as those at step S 11  through S 13  in  FIG. 13  are executed at step S 101  through S 103 , respectively. 
     That is, as at step S 11  shown in  FIG. 13 , the prediction tap extraction unit  51 , at step S 101 , selects a pixel of interest from among pixels of the second image data previously not selected as a pixel of interest. Furthermore, the prediction tap extraction unit  51  extracts some of pixels (and pixel values thereof) of the first image signal used for predicting the pixel value of the pixel of interest as a prediction tap. The prediction tap extraction unit  51  then delivers the prediction tap of the pixel of interest to the prediction computing unit  56 . The process then proceeds to step S 102 . 
     At step S 102 , as at step S 12  shown in  FIG. 13 , the class tap extraction unit  53  extracts some of pixels of the first image signal used for performing a class classification of the pixel of interest as a class tap. The class tap extraction unit  53  then delivers the obtained class tap to the class code generation unit  54 . The process then proceeds to step S 103 . 
     At step S 103 , as at step S 13  shown in  FIG. 13 , the class code generation unit  54  classifies the pixel of interest on the basis of a pixel value (level) of a pixel of the class tap from the class tap extraction unit  53 . The class code generation unit  54  generates a spatial or temporal class code corresponding to the class obtained from the classification. The class code generation unit  54  then delivers the spatial or temporal class code to the class code generation unit  303 . Thereafter, the process proceeds to step S 104 . 
     At step S 104 , the motion vector detection unit  301  detects a motion vector of the first signal in the same frame as that of the pixel of interest and delivers the detected motion vector to the class code generation unit  302 . The process then proceeds to step S 105 . 
     At step S 105 , the class code generation unit  302  classifies the pixel of interest on the basis of the motion vector delivered from the motion vector detection unit  301  and generates a motion class code corresponding to the obtained class. The class code generation unit  302  then delivers the motion class code to the class code generation unit  303 . The process then proceeds to step S 106 . 
     Here, the motion vector detection unit  301  may detect a vector representing the motion of the class tap obtained by the class tap extraction unit  53 , and the class code generation unit  302  may perform classification of the pixel of interest on the basis of the motion vector of the class tap. 
     At step S 106 , the class code generation unit  303  generates a class code representing the final class of the pixel of interest on the basis of the spatial or temporal class code of the pixel of interest from the class code generation unit  54  and the motion class code of the pixel of interest from the class code generation unit  302 . The class code generation unit  303  delivers the generated class code to the coefficient generation unit  55 . The process then proceeds to step S 107 . 
     At step S 107 , as at step S 14  shown in  FIG. 13 , the switch control circuit  71  of the coefficient generation unit  55  (see  FIG. 12 ) recognizes the position of the display panel  3 . That is, the switch control circuit  71  receives the positional information delivered from the controller  31  (see  FIG. 8 ) and recognizes the position of the display panel  3  indicated by the positional information. 
     The process then proceeds from step S 107  to step S 108 . As at step S 15  shown in  FIG. 13 , the switch control circuit  71  selects, from among the M coefficient generation circuits  81   1  to  81   M  shown in  FIG. 12 , the coefficient generation circuit  81   m  corresponding to the position of the display panel  3  recognized from the positional information delivered from the controller  31 . The process then proceeds to step S 109 . At step S 109 , the coefficient generation circuit  81   m  selected by the switch control circuit  71  delivers the tap coefficient of the class corresponding to the class code delivered from the class code generation unit  303  to the prediction computing unit  56 . The process then proceeds to step S 110 . 
     At step S 110 , as at step S 17  shown in  FIG. 13 , the prediction computing unit  56  receives the prediction tap output from the prediction tap extraction unit  51  and the tap coefficient output from the coefficient generation unit  55  and performs a prediction calculation for equation (1) which finds a prediction value of the actual value of the pixel of interest using the prediction tap and the tap coefficient. Thus, the prediction computing unit  56  outputs the pixel value (the prediction value of the pixel value) of the pixel of interest, namely, the pixel value of the pixel of the second image signal. 
     In the image conversion process shown in  FIG. 20 , pixels of the second image signal are sequentially selected as a pixel of interest. 
     As described above, the partition TV includes the display panel  3  for displaying an image, the remote control I/F  34  for receiving an operational input from a user (i.e., an operation signal from the remote control unit  10 ), and the drive control unit  42  capable of moving the display panel  3  by driving the actuator  43 . Since the drive control unit  42  moves the display panel  3  on the basis of the operational input received by the remote control I/F  34  and changes the arrangement of the display panel  3  functioning as a partition, the partition TV can provide a convenient apparatus that functions as both a television receiver (display apparatus) and a partition. 
     The partition TV can also be considered to be a signal processing apparatus that functions as a television receiver and a partition by including signal processing means for processing an input signal (e.g., the motion vector detection unit  41  or the motion vector detection unit  301 ); reception means for receiving an operational input from a user (e.g., the remote control I/F  34 ); drive control means (e.g., the drive control unit  42 ) for controlling the actuator  43  to drive the partition TV (i.e., the top panel  2 , the display panel  3 , and the support panel  5 ) on the basis of the motion vector which is a signal obtained from the process (signal processing) of the motion vector detection unit  41  or the operational input received by the remote control I/F  34 . 
     However, in such a signal processing apparatus, the signal processing means is not limited to the motion vector detection unit  41  and the reception means is not limited to the remote control I/F  34 . Furthermore, the signal processing apparatus may be an apparatus that functions as an apparatus performing a signal processing other than that of a television receiver and a furniture other than a partition. Still furthermore, the signal processing apparatus may be an apparatus that functions as a plurality of apparatuses other than a television receiver and a partition. 
       FIGS. 21 and 22  illustrate perspective views of an air conditioner TV, which is a signal processing apparatus functioning as a television receiver and an air conditioner. 
       FIG. 21  illustrates a perspective view of the air conditioner TV viewed from the front thereof and  FIG. 22  illustrates a perspective view of the air conditioner TV viewed from the back thereof. 
     By decreasing the thickness (the length in the depth direction) of the air conditioner TV to some degree, the air conditioner TV can function as a partition of furniture just like the partition TV. 
     However, when the air conditioner TV also functions as a partition, a heat problem may occur. 
     That is, in apparatuses having an electronic circuit (electric circuit) including a television receiver, an electrical current flowing in the electronic circuit generates heat, thus increasing the temperature. To prevent the temperature from rising, it is designed to dissipate the heat. For example, a normal television receiver is designed to dissipate the heat from the back surface thereof. 
     Like the normal television receiver, the air conditioner TV functioning as a partition can simply dissipate the heat from the back surface thereof. However, in this case, a user who sits on the back surface of the air conditioner TV functioning as a partition may feel uncomfortable due to the dissipation of heat, in particular, in the hot summer season. 
     In the cold winter season, for example, an air conditioner supplies heat. However, in general, an air conditioner is installed at a high position in a room and warm air heated by the air conditioner tends to stay at a high position in the room. Thus, it is difficult to warm the vicinity of a floor of the room. 
     Accordingly, the air conditioner TV shown in  FIGS. 21 and 22  can adaptively change a direction to dissipate the heat (a heat dissipation direction). 
     That is, as shown in  FIG. 21 , a display unit  401  including, for example, a liquid crystal display panel or a display using a plasma display method is mounted on the front surface of the air conditioner TV. 
     Additionally, as shown in  FIGS. 21 and 22 , a rectangular air vent  402 , for example, is provided on the top of the air conditioner TV to dissipate the heat. As shown in  FIG. 22 , a rectangular air vent  403 , for example, is further provided on the lower section of the back surface of the air conditioner TV to dissipate the heat. 
       FIG. 23  illustrates a right side cross-sectional view of the air conditioner TV shown in  FIGS. 21 and 22 . 
     A circuit block  411 , which is an electronic circuit (electric circuit) for processing signals, is disposed at the front side of the air conditioner TV, namely, at the side adjacent to the display unit  401 . The circuit block  411  performs a signal process to allow the air conditioner TV to function as a television receiver and further performs a signal process to control a heat processing unit  412 , which is described below, so as to allow the air conditioner TV to function as an air conditioner. 
     The heat processing unit  412  processes heat generated by the circuit block  411 . 
     That is, when the circuit block  411  processes signals, an electrical current flows in an electronic circuit of the circuit block  411 . The flow of the electrical current generates heat. The heat processing unit  412  processes the heat generated by the circuit block  411 . Since the circuit block  411  generates heat, the circuit block  411  is considered to be a heat source. 
     The heat processing unit  412  is disposed on the back surface of the air conditioner TV. An intake port  421  is formed on a surface adjacent to the front of the air conditioner TV to draw air heated by the circuit block  411  serving as a heat source. 
     In the heat processing unit  412 , the heated air transferred from the intake port  421  is led to a heat exhaust air duct  422 . The heat exhaust air duct  422  is a cylindrical duct to dissipate the heat transferred from the intake port  421 . It should be noted that the shape of the heat exhaust air duct  422  in cross section may be any shape. The heat exhaust air duct  422  communicates with the air vent  402  (see  FIGS. 21 and 22 ) disposed on the top of the air conditioner TV and the air vent  403  (see  FIG. 22 ) disposed in the lower section of the back surface of the air conditioner TV. Consequently, the heated air transferred from the intake port  421  is dissipated from the air vent  402  or  403  via the heat exhaust air duct  422 . 
     A thermal insulator  423  is disposed on the back surface of the air conditioner TV to prevent the heat passing through the heat exhaust air duct  422  from dissipating through the back surface of the air conditioner TV. Consequently, a user sitting behind the air conditioner TV does not feel uncomfortable due to the unwanted heat dissipated from the back surface of the air conditioner TV. 
     Additionally, in the heat processing unit  412 , a cooling pipe  424  is disposed in the vicinity of the air vent  402 . 
     That is, the cooling pipe  424  is disposed in the vicinity of the air vent  402  and outside the heat exhaust air duct  422  such that the cooling pipe  424  surrounds the cylindrical heat exhaust air duct  422 . The cooling pipe  424  is filled with cooling liquid. The circulation (flow) of the cooling liquid in the cooling pipe  424  cools the heated air dissipated from the heat exhaust air duct  422  via the air vent  402 . 
     Furthermore, temperature sensors  425 U and  425 D are disposed on the upper and lower section of thermal insulator  423  facing the intake port  421 , respectively. The temperature sensor  425 U senses the temperature of the heated air passing through the heat exhaust air duct  422  and dissipated from the upper air vent  402 . On the other hand, the temperature sensor  425 D senses the temperature of the heated air passing through the heat exhaust air duct  422  and dissipated from the lower air vent  403 . 
     In the heat processing unit  412 , a flat plate cover  426 U is disposed in the heat exhaust air duct  422  at a position above the intake port  421  to block the heated air flowing to the upper air vent  402 . A part of periphery of the cover  426 U is attached to a shaft  427 U mounted in the heat exhaust air duct  422  at a position above the intake port  421 . The cover  426 U is pivotable about the shaft  427 U so that the cover  426 U is openable and closable, as shown by arrow al. In  FIG. 23 , the cover  426 U is in a closed condition. 
     A fan  428 U is mounted on the lower surface of the cover  426 U in a closed condition. That is, a shaft  429 U is attached to the lower surface of the cover  426 U in a closed condition. The fan  428 U rotates about the shaft  429 U so that an air flow is propagated downward. 
     Furthermore, in the heat processing unit  412 , a flat plate cover  426 D is disposed in the heat exhaust air duct  422  at a position under the intake port  421  to block the heated air flowing to the lower air vent  403 . A part of periphery of the cover  426 D is attached to a shaft  427 D mounted in the heat exhaust air duct  422  at a position under the intake port  421 . The cover  426 D is pivotable about the shaft  427 D so that the cover  426 D is openable and closable, as shown by arrow a 2 . In  FIG. 23 , the cover  426 D is in a closed condition. 
     A fan  428 D is mounted on the upper surface of the cover  426 D in a closed condition. That is, a shaft  429 D is attached to the upper surface of the cover  426 D in a closed condition. The fan  428 D rotates about the shaft  429 D so that an air flow is propagated upward. 
     The angle between the shaft  429 D attached to the cover  426 D and the cover  426 D can be changed by, for example, a few degrees to few dozens of degrees so that the direction of the air flow generated by the rotation of the fan  428 D can be changed. 
     In the heat processing unit  412 , as well as the fans  428 U and  428 D, a fan  428 C is mounted in the heat exhaust air duct  422  at a position opposed to the intake port  421 . That is, a shaft  429 C is attached to the inner wall of the heat exhaust air duct  422  at a position opposed to the intake port  421 . The fan  428 C rotates about the shaft  429 C so that an air flow is propagated towards the intake port  421 . 
     Like the shaft  429 D, the angle between the shaft  429 C and the inner wall of the heat exhaust air duct  422  can be changed by, for example, a few degrees to few dozens of degrees so that the direction of the air flow generated by the rotation of the fan  428 C can be changed. 
     The air conditioner TV having such a structure adaptively changes the direction to dissipate the heat generated by the circuit block  411  in accordance with, for example, the seasons (in Japan). 
     That is, if the seasons are spring, summer, fall, and winter, the air conditioner TV provides four operation modes, namely, a spring mode, a summer mode, a fall mode, and a winter mode corresponding to the seasons. 
       FIG. 24  illustrates a cross-sectional view of the air conditioner TV the same as that of  FIG. 23  when the operation mode is a spring or summer mode. 
     In the spring or summer mode, the upper cover  426 U is open and the lower cover  426 D is closed. Thus, a route in which the heated air transferred from the intake port  421  is dissipated from the upper air vent  402  via the heat exhaust air duct  422  is created and a route in which the heated air is dissipated from the lower air vent  403  is blocked. 
     Additionally, in the spring or summer mode, the shaft  429 C of the fan  428 C is tilted so that the air flow generated by the fan  428 C is directed obliquely upward. 
     Thereafter, the fan  428 C starts rotating and an air flow is propagated obliquely upward. Thus, the heated air transferred from the intake port  421  is dissipated from the upper air vent  402 . 
     Furthermore, the cooling liquid in the cooling pipe  424  is circulated and the fan  428 D rotates as needed. 
     By circulating the cooling liquid in the cooling pipe  424 , the heated air dissipated from the upper air vent  402  is cooled. Additionally, by rotating the fan  428 D, an air flow is propagated upward in  FIG. 24 . Consequently, the heated air transferred from the intake port  421  is more rapidly dissipated from the upper air vent  402 . 
     As described above, in the spring or summer mode, since the heated air is upwardly dissipated from the upper air vent  402 , the user sitting behind the air conditioner TV is prevented from feeling uncomfortable due to the heat dissipated from the air conditioner TV, for example, in a hot summer. 
       FIG. 25  illustrates a cross-sectional view of the air conditioner TV the same as that of  FIG. 23  when the operation mode is a fall or winter mode. 
     In the fall or winter mode, the upper cover  426 U is closed and the lower cover  426 D is open. Thus, the route in which the heated air transferred from the intake port  421  is dissipated from the upper air vent  402  via the heat exhaust air duct  422  is blocked and the route in which the heated air is dissipated from the lower air vent  403  is created. 
     Additionally, in the fall or winter mode, the shaft  429 C of the fan  428 C is tilted so that an air flow generated by the fan  428 C is directed obliquely downward. 
     Thereafter, the fans  428 C and  428 U start rotating and an air flow is propagated downward. Thus, the heated air transferred from the intake port  421  is dissipated from the lower air vent  403 . 
     Furthermore, the shaft  429 D of the fan  428 D attached to the open cover  426 D is tilted so that the air flow direction of the fan  428 D is determined to be obliquely downward and the fan  428 D starts rotating as needed. 
     In this case, the air flow is propagated downward more strongly. Consequently, the heated air transferred from the intake port  421  is more rapidly dissipated from the lower air vent  403 . 
     As described above, in the spring or summer mode, since the heated air is dissipated from the lower air vent  403 , the vicinity of the floor can be efficiently heated, for example, in a cold winter. That is, the heat generated by the circuit block  411  is efficiently utilized for heating. 
     Although not shown in  FIGS. 23 through 25 , an actuator (e.g., a motor) is attached to the heat processing unit  412  as needed. The actuator attached to the heat processing unit  412  rotates the fans  428 C,  428 D, and  428 U, tilts the shafts  429 C and  429 D, opens and closes the covers  426 D and  426 U, and circulates the cooling liquid in the cooling pipe  424 . 
       FIG. 26  illustrates the electrical configuration of the circuit block  411  shown in  FIG. 23 . 
     The circuit block  411  includes a TV unit  440  and an air conditioner unit  441 . 
     The TV unit  440  performs signal processing for the air conditioner TV to function as a television receiver. 
     The air conditioner unit  441  includes a temperature information receiving unit  442 , a signal receiving unit  443 , and a control unit  444  to control the heat processing unit  412  (see  FIG. 23 ). 
     That is, the temperature information receiving unit  442  receives temperature information which indicates the temperature in the heat exhaust air duct  422  and which is output from the temperature sensors  425 U and  425 D. The temperature information receiving unit  442  then delivers the temperature information to the control unit  444 . 
     The signal receiving unit  443  receives, for example, an operation signal from a remote control unit  445  operated by a user to remotely control the air conditioner TV, namely, a signal corresponding to the user operation when the user operates the remote control unit  445 . The signal receiving unit  443  then delivers the operation signal to the control unit  444 . 
     The control unit  444  includes a CPU  444 A, a ROM  444 B, a RAM  444 C, and an EEPROM  444 D. The CPU  444 A executes programs stored in the ROM  444 B and the EEPROM  444 D. The CPU  444 A also executes programs loaded in the RAM  444 C. The ROM  444 B stores a program to be executed first when power is supplied to the control unit  444  and data required for the program. The EEPROM  444 D stores a variety of application programs to be executed by the CPU  444 A and data required for the programs. The application program to be executed by the CPU  444 A is loaded in the RAM  444 C from the EEPROM  444 D. The RAM  444 C also stores data required for the execution of the CPU  444 A. 
     In the control unit  444 , the CPU  444 A executes the programs stored in the ROM  444 B and the EEPROM  444 D and the programs loaded in the RAM  444 C to perform a variety of processes including processes described below. Thus, the control unit  444  controls, for example, a cooling actuator  451 , fan actuators  452 U,  452 C, and  452 D, and a cover actuators  453 U and  453 D. 
     The programs to be executed by the CPU  444 A can be preinstalled in the ROM  444 B or the EEPROM  444 D. Alternatively, the programs can be supplied as package software by being temporarily or permanently stored (recorded) in a removable recoding medium, such as a flexible disk, a CD-ROM, an MO disk, a DVD, a magnetic disk, and a semiconductor memory. 
     Furthermore, the programs can be wirelessly transferred to the air conditioner TV from a download site via an artificial satellite for digital satellite broadcast or can be transferred to the air conditioner TV by wire from the download site via a network, such as a local area network (LAN) or the Internet. The air conditioner TV can receive the transferred programs and install them in the EEPROM  444 D. 
     The cooling actuator  451 , the fan actuators  452 U,  452 C, and  452 D, and the cover actuators  453 U and  453 D are mounted in the heat processing unit  412  (none are shown in  FIGS. 23 through 25 ). 
     The cooling actuator  451  circulates cooling liquid in the cooling pipe  424  (see  FIG. 23 ) under the control of the control unit  444 . 
     The fan actuators  452 U,  452 C, and  452 D drive the fans  428 U,  428 C, and  428 D to rotate, respectively, under the control of the control unit  444 . Additionally, the fan actuators  452 C and  452 D tilt the shafts  429 C and  429 D (change the tilt angles of the shafts  429 C and  429 D), respectively, under the control of the control unit  444 . 
     The cover actuators  453 U and  453 D drive the covers  426 U and  426 D to be open or closed, respectively, under the control of the control unit  444 . 
     The operation of the air conditioner TV is described below with reference to a flow chart shown in  FIG. 27 . 
     For example, when a user operates the remote control unit  445  to power on the air conditioner TV, the remote control unit  445  transmits an operation signal corresponding to the operation. The operation signal is received by the signal receiving unit  443  and is delivered to the control unit  444 . Upon receiving the operation signal instructing power-on of the air conditioner TV from the signal receiving unit  443 , the control unit  444 , at step S 201 , starts supplying power from a power supply (not shown) to each block of the air conditioner TV. The process then proceeds to step S 202 . 
     At step S 202 , the control unit  444  determines the operation mode. 
     That is, for example, the remote control unit  445  includes a key for inputting the operation mode. When the user operates the key and the signal receiving unit  443  receives an operation signal corresponding to the operation and delivers it to the control unit  444 , the control unit  444 , at step S 202 , sets the operation mode corresponding to the operation signal from the signal receiving unit  443 . More specifically, if the operation signal indicates one of the spring, summer, fall, and winter modes, the control unit  444  sets a flag for indicating an operation mode in the EEPROM  444 D to indicate the operation mode corresponding to the operation signal. 
     When a remote control unit of an air conditioner (not shown) is operated, the signal receiving unit  443  can receive an operation signal corresponding to the operation of the air conditioner and deliver it to the control unit  444 . In this case, if the operation signal from the remote control unit of the air conditioner instructs the cooling mode to turn on or off, the control unit  444 , at step S 202 , determines the operation mode to be a summer mode. In contrast, if the operation signal from the remote control unit of the air conditioner instructs the heating mode to turn on or off, the control unit  444 , at step S 202 , determines the operation mode to be a winter mode. 
     After the operation mode is set at step S 202 , the process proceeds to step S 203 , where the control unit  444  determines which one of the spring, summer, fall, and winter modes corresponds to the current operation mode. 
     If it is determined at step S 203  that the current operation mode is one of the spring and summer modes, that is, if it is determined that information indicating the spring or summer mode is set to the operation mode flag in the EEPROM  444 D, the process proceeds to step S 204 . The heat processing unit  412  (see  FIG. 23 ) includes the fan  428 U attached to the upper section thereof (hereinafter also referred to an upper fan), the fan  428 D attached to the lower section thereof (hereinafter also referred to an lower fan), and the fan  428 C attached to the central section thereof (hereinafter also referred to an central fan). At step S 204 , the control unit  444  drives the fan actuator  452 C to tilt the shaft  429 C of the central fan  428 C so that an air flow generated by the central fan  428 C is propagated obliquely upwards. The process then proceeds to step S 205 . 
     Thus, as shown in  FIG. 24 , the shaft  429 C of the central fan  428 C is tilted so that the direction of the air flow generated by the central fan  428 C is obliquely upward. 
     Additionally, at step S 204 , the control unit  444  drives the fan actuator  452 C, which rotates the central fan  428 C, to rotate the central fan  428 C. 
     Thus, an air flow is propagated upward in the heat exhaust air duct  422 . 
     At step S 205 , the control unit  444  drives the cover actuator  453 U, which opens and closes the upper cover  426 U of the heat processing unit  412  (see  FIG. 23 ), to open the upper cover  426 U and drives the cover actuator  453 D, which opens and closes the lower cover  426 D, to close the lower cover  426 D. 
     Thus, as shown in  FIG. 24 , a route in which the heated air transferred from the intake port  421  is dissipated from the upper air vent  402  via the heat exhaust air duct  422  is created and a route in which the heated air is dissipated from the lower air vent  403  is blocked. 
     As described above, in the spring or summer mode, the air flow is propagated upward in the heat exhaust air duct  422 . Furthermore, a route in which the heated air transferred from the intake port  421  is dissipated from the upper air vent  402  via the heat exhaust air duct  422  is created and a route in which the heated air is dissipated from the lower air vent  403  is blocked. 
     As a result, the heat air transferred from the intake port  421  is upwardly dissipated from only the upper air vent  402  without being dissipated from the lower air vent  403 . Consequently, a user sitting behind the air conditioner TV does not feel uncomfortable due to the heat dissipated from the circuit block  411 . 
     After the process at step S 205  is performed, the process proceeds to step S 206 , where the control unit  444  determines which one of the spring and summer modes corresponds to the current operation mode. 
     If, at step S 206 , it is determined that the current operation mode is the summer mode, the process proceeds to step S 207 , where the control unit  444  drives the cooling actuator  451  to circulate the cooling liquid in the cooling pipe  424 . The process then proceeds to step S 209 . 
     Thus, the heated air transferred from the intake port  421  is cooled by the cooling liquid in the cooling pipe  424  immediately before being dissipated from the upper air vent  402 . The heated air is then dissipated from the upper air vent  402 . That is, in a hot summer suitable for the summer mode, the heated air dissipated from the upper air vent  402  may raise the temperature of the room although the user would not feel uncomfortable due to the direct heated air. As a result, the user may feel uncomfortable due to the indirect heated air. Accordingly, in the summer mode, the heated air transferred from the intake port  421  is dissipated from the upper air vent  402  after the heated air is cooled by the cooling liquid in the cooling pipe  424 . 
     In contrast, if it is determined at step S 206  that the current operation mode is the spring mode, the process proceeds to step S 208 , where the control unit  444  controls the cooling actuator  451  to stop the circulation of the cooling liquid in the cooling pipe  424 . The process then proceeds to step S 209 . If the circulation of the cooling liquid has been already stopped, the process at step S 208  is skipped. 
     At step S 209 , the temperature information receiving unit  442  receives the temperature information from the upper temperature sensor  425 U, which is one of the upper temperature sensor  425 U and the lower temperature sensor  425 D, that is, the temperature information receiving unit  442  receives the temperature information indicating the temperature of the heated air transferred from the intake port  421  and dissipated from the upper air vent  402 . The temperature information receiving unit  442  delivers the temperature information to the control unit  444 . The process then proceeds to step S 210 . 
     At step S 210 , the control unit  444  determines whether the temperature represented by the temperature information from the upper temperature sensor  425 U is higher than or equal to a predetermined threshold value. 
     If it is determined at step S 210  that the temperature represented by the temperature information from the upper temperature sensor  425 U is higher than or equal to a predetermined threshold value, the process then proceeds to step S 211 . At step S 211 , as shown in  FIG. 24 , the control unit  444  drives the fan actuator  452 D, which rotates the lower fan  428 D attached to the closed lower cover  426 D, to rotate the lower fan  428 D. The process then proceeds to step S 214 . 
     Consequently, when the temperature of the heated air transferred from the intake port  421  and dissipated from the upper air vent  402  is high, the central fan  428 C and the lower fan  428 D rotate so that a stronger air flow is propagated upwards. Thus, the heated air transferred from the intake port  421  is more rapidly dissipated from the upper air vent  402 . 
     Here, the heat transferred from the intake port  421 , namely, the air heated by this heat moves upward without the help of the upward air flow generated by the fan. Therefore, at step S 204 , only the central fan  428 C, which is one of the central fan  428 C and the lower fan  428 D, is rotated and the lower fan  428 D is not rotated. However, at step S 204 , both the central fan  428 C and lower fan  428 D may be rotated. 
     If, at step S 211 , the lower fan  428 D has already rotated, the process at step S 211  is skipped. 
     In contrast, if it is determined at step S 210  that the temperature represented by the temperature information from the upper temperature sensor  425 U is lower than the predetermined threshold value, the process then proceeds to step S 212 . At step S 212 , the control unit  444  then determines whether the lower fan  428 D is rotating. If it is determined at step S 212  that the lower fan  428 D is not rotating, the process at step S 213  is skipped. The process then proceeds to step S 214 . 
     If it is determined at step S 212  that the lower fan  428 D is rotating, that is, if it is determined that the lower fan  428 D is unnecessarily rotating although the temperature represented by the temperature information from the upper temperature sensor  425 U, namely, the temperature of the heated air transferred from the intake port  421  and dissipated from the upper air vent  402  is low and the rapid dissipation of the heated air is not necessary, the process then proceeds to step S 213 . At step S 213 , the control unit  444  controls the fan actuator  452 D to stop the rotation of the fan  428 D. The process then proceeds to step S 214 . 
     At step S 214 , the control unit  444  determines whether it has received the instruction to power off the air conditioner TV. If it is determined at step S 214  that the control unit  444  has received the instruction to power off the air conditioner TV, that is, if, for example, the user operates the remote control unit  445  to power off the air conditioner TV and the operation signal corresponding to the operation is transmitted from the remote control unit  445  and if the operation signal is received by the signal receiving unit  443  and is delivered to the control unit  444 , the process then proceeds to step S 226 . At step S 226 , the control unit  444  stops supplying power from a power supply (not shown) to each block of the air conditioner TV. The process is then completed. 
     If it is determined at step S 214  that the control unit  444  has received no instruction to power off the air conditioner TV, the process then proceeds to step S 215 . At step S 215 , the control unit  444  determines whether it has received the instruction to change the operation mode of the air conditioner TV. 
     If it is determined at step S 215  that the control unit  444  has received no instruction to change the operation mode of the air conditioner TV, the process returns to step S 209 , where the same subsequent processes are repeated. 
     If it is determined at step S 215  that the control unit  444  has received the instruction to change the operation mode of the air conditioner TV, that is, if, for example, the user operates the remote control unit  445  to input the operation mode and the operation signal corresponding to the operation is transmitted from the remote control unit  445  and if the operation signal is received by the signal receiving unit  443  and is delivered to the control unit  444 , the process then returns to step S 202 . At step S 202 , the operation mode is set (changed) in response to the instruction to change the operation mode. Thereafter, the same subsequent processes are repeated. 
     In contrast, if it is determined at step S 203  that the current operation mode is one of the fall and winter modes, that is, if it is determined that information indicating the fall or winter mode is set to the operation mode flag in the EEPROM  444 D, the process proceeds to step S 216 . At step S 216 , the control unit  444  drives the fan actuator  452 C to tilt the shaft  429 C of the central fan  428 C, which is one of the upper fan  428 U, the lower fan  428 D, and the central fan  428 C of the heat processing unit  412  (see  FIG. 23 ), so that an air flow generated by the central fan  428 C is propagated obliquely downwards. The process then proceeds to step S 217 . 
     Thus, as shown in  FIG. 25 , the shaft  429 C of the central fan  428 C is tilted so that the air flow generated by the central fan  428 C is propagated obliquely downward. 
     Additionally, at step S 216 , the control unit  444  drives the fan actuator  452 C, which rotates the central fan  428 C, to rotate the central fan  428 C. 
     Thus, the air flow is propagated downward in the heat exhaust air duct  422 . 
     At step S 217 , the control unit  444  drives the cover actuator  453 U, which opens and closes the upper cover  426 U of the heat processing unit  412  (see  FIG. 23 ), to close the upper cover  426 U and drives the cover actuator  453 D, which opens and closes the lower cover  426 D, to open the lower cover  426 D. 
     Thus, as shown in  FIG. 25 , a route in which the heated air transferred from the intake port  421  is dissipated from the upper air vent  402  via the heat exhaust air duct  422  is blocked and a route in which the heated air is dissipated from the lower air vent  403  is created. 
     As described above, in the fall or winter mode, the air flow is propagated downward in the heat exhaust air duct  422 . Furthermore, a route in which the heated air transferred from the intake port  421  is dissipated from the upper air vent  402  via the heat exhaust air duct  422  is blocked and a route in which the heated air is dissipated from the lower air vent  403  is created. 
     As a result, the heated air transferred from the intake port  421  is dissipated from only the lower air vent  403  along the floor without being dissipated from the upper air vent  402 . Consequently, in low-temperature fall and winter seasons suitable for the fall and winter modes, the heat dissipated from the circuit block  411  can be efficiently utilized to warm the vicinity of the floor. 
     After the process at step S 217  is performed, the process proceeds to step S 218 , where, as shown in  FIG. 25 , the control unit  444  drives the fan actuator  452 U, which rotates the upper fan  428 U attached to the closed upper cover  426 U, to rotate the upper fan  428 U. The process then proceeds to step S 219 . 
     Accordingly, in this case, the central fan  428 C and the upper fan  428 U rotate so that a stronger air flow is propagated downward. Thus, the heated air transferred from the intake port  421  is more rapidly dissipated from the lower air vent  403 . 
     Here, the heat transferred from the intake port  421 , namely, the air heated by this heat has a characteristic to move upward. Therefore, to dissipate the heat from the lower air vent  403 , the stronger downward air flow is generated by rotating both the central fan  428 C and the upper fan  428 U. 
     At step S 219  , the temperature information receiving unit  442  receives the temperature information from the temperature sensor  425 D, which is one of the upper temperature sensor  425 U and the lower temperature sensor  425 D, that is, the temperature information receiving unit  442  receives the temperature information indicating the temperature of the heated air transferred from the intake port  421  and dissipated from the lower air vent  403 . The temperature information receiving unit  442  delivers the temperature information to the control unit  444 . The process then proceeds to step S 220 . 
     At step S 220 , the control unit  444  determines whether the temperature represented by the temperature information from the lower temperature sensor  425 D is higher than or equal to a predetermined threshold value. 
     If it is determined at step S 220  that the temperature represented by the temperature information from the lower temperature sensor  425 D is higher than or equal to a predetermined threshold value, the process then proceeds to step S 221 . At step S 221 , as shown in  FIG. 25 , the control unit  444  tilts the shaft  429 D of the lower fan  428 D so that the air flow generated by the lower fan  428 D attached to the open lower cover  426 D is propagated obliquely downward, and drives the fan actuator  452 D, which rotates the fan  428 D. The process then proceeds to step S 224 . Thus, the stronger air flow is propagated in the heat exhaust air duct  422 . 
     Consequently, when the temperature of the heated air transferred from the intake port  421  and dissipated from the lower air vent  403  is high, the central fan  428 C, the upper fan  428 U, and also the lower fan  428 D rotate so that an air flow is propagated downward. Thus, the heated air transferred from the intake port  421  is more rapidly dissipated from the lower air vent  403  than in the case where only the central fan  428 C and the upper fan  428 U rotate. 
     If, at step S 221 , the lower fan  428 D has already rotated, the process at step S 221  is skipped. 
     In contrast, if it is determined at step S 220  that the temperature represented by the temperature information from the lower temperature sensor  425 D is lower than the predetermined threshold value, the process then proceeds to step S 222 . At step S 222 , the control unit  444  then determines whether the lower fan  428 D is rotating. If it is determined at step S 222  that the lower fan  428 D is not rotating. The process at step S 223  is skipped. The process then proceeds to step S 224 . 
     If it is determined at step S 222  that the lower fan  428 D is rotating, that is, if it is determined that the lower fan  428 D is unnecessarily rotating although the temperature represented by the temperature information from the lower temperature sensor  425 D, namely, the temperature of the heated air transferred from the intake port  421  and dissipated from the lower air vent  403  is low and the rapid dissipation of the heated air is not necessary, the process then proceeds to step S 223 . At step S 223 , the control unit  444  drives the fan actuator  452 D to stop the rotation of the fan  428 D. The process then proceeds to step S 224 . 
     At step S 224 , as at step S 214 , the control unit  444  determines whether it has received the instruction to power off the air conditioner TV. 
     If it is determined at step S 224  that the control unit  444  has not received an instruction to power off the air conditioner TV, the process then proceeds to step S 225 . At step S 225 , the control unit  444 , as at step S 215 , determines whether it has received the instruction to change the operation mode of the air conditioner TV. 
     If it is determined at step S 225  that the control unit  444  has not received an instruction to change the operation mode of the air conditioner TV, the process returns to step S 219 , where the same subsequent processes are repeated. 
     If it is determined at step S 225  that the control unit  444  has received the instruction to change the operation mode of the air conditioner TV, the process then returns to step S 202 . At step S 202 , the operation mode is set (changed) in response to the instruction to change the operation mode. Thereafter, the same subsequent processes are repeated. 
     In contrast, if it is determined at step S 224  that the control unit  444  has received the instruction to power off the air conditioner TV, the process then proceeds to step S 226 . At step S 226 , the control unit  444  stops supplying power from a power supply (not shown) to each block of the air conditioner TV, as described above. The process is then completed. 
     The heat processing unit  412  of the air conditioner TV has the structure shown in  FIG. 23 . However, the heat processing unit  412  may have the structure, for example, shown in  FIGS. 28 and 29 . 
     That is,  FIGS. 28 and 29  illustrate right side cross-sectional views of another example of the air conditioner TV shown in  FIG. 21 . In the drawings, identical elements to those illustrated and described in relation to  FIG. 23  are designated by identical reference numerals, and therefore, the descriptions are not repeated here. That is, the air conditioner TV shown in  FIGS. 28 and 29  is basically identical to that shown in  FIG. 23  except that the heat processing unit  412  further includes a cooling pipe  430 . 
     As shown in  FIGS. 28 and 29 , the cooling pipe  430  is provided in the vicinity of the air vent  403  of the heat exhaust air duct  422 . 
     That is, the cooling pipe  430  is disposed in the vicinity of the lower air vent  403  and outside the heat exhaust air duct  422  such that the cooling pipe  430  surrounds the cylindrical heat exhaust air duct  422 . The cooling pipe  430  is filled with cooling liquid. The circulation (flow) of the cooling liquid in the cooling pipe  430  cools the heated air dissipated from the heat exhaust air duct  422  via the air vent  403 . 
     In the air conditioner TV having the structure shown in  FIGS. 28 and 29 , for example, if the operation mode is the fall mode, the cooling liquid circulates in the cooling pipe  430 , as shown by hatching in  FIG. 28 . Thus, the heated air transferred from the intake port  421  is cooled by the cooling liquid in the cooling pipe  430  immediately before being dissipated from the lower air vent  403 . The heated air is then dissipated from the lower air vent  403 . 
     That is, in a not-so-cold season like fall suitable for the fall mode, since heating of a room is sometimes not required, the heat transferred from the intake port  421  can be cooled by the cooling liquid in the cooling pipe  430  and can be dissipated from the lower air vent  403  in the fall mode. 
     In contrast, if the operation mode is the winter mode, the cooling liquid does not circulate in the cooling pipe  430 , as shown in  FIG. 29 . Thus, the heated air transferred from the intake port  421  is dissipated from the lower air vent  403  without cooling the heated air. 
     That is, in a cold season like winter suitable for the winter mode, since heating of the room is required, the heated air transferred from the intake port  421  can be directly dissipated from the lower air vent  403  without cooling the heated air, like the air conditioner TV shown in  FIG. 23 . 
     In  FIGS. 21 through 29 , the circuit block  411  serving as a heat source includes the TV unit  440  which performs signal processing of the television receiver. However, a block included in the circuit block  411  serving as a heat source is not limited to the block that performs signal processing of the television receiver. Alternatively, the block may be a block that performs another signal processing. In this case, a whole apparatus including the circuit block  411  has a function corresponding to the signal processing performed by the block included in the circuit block  411 . 
     In the present specification, the steps described with reference to the above-described flow charts are not necessarily executed in the above-described sequence, but may be executed in parallel or independently. 
     According to an embodiment of the present invention, an apparatus that functions as a plurality of apparatuses (e.g., an apparatus for displaying an image and a partition) can be provided. 
     It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof.