Patent Publication Number: US-2006005222-A1

Title: Television broadcast receiving apparatus, system and method having separate display area for displaying an enlarged portion of web page while simultaneously displaying web page at a predetermined aspect ratio

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS  
      This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2004-192405, filed Jun. 30, 2004, the entire contents of which are incorporated herein by reference.  
     BACKGROUND OF THE INVENTION  
      1. Field of the Invention  
      The present invention relates to a television broadcast receiving apparatus, a television broadcast receiving system and a display control method for controlling a web page display.  
      2. Description of the Related Art  
      When a user reviews a web content by a display device of a computer, the user normally performs the operation to input various data and commands by using an input device while reviewing a character and a figure of the web content displayed on the display device.  
      In recent years, since a computer network has widely prevailed, it has been strongly desired to enlarge a character or the like of the web content displayed on the display device of the computer so that the user can easily recognize details of the web content.  
      As such an applied apparatus, for example, U.S. Patent Application Publication No. US 2001/0054049 A1 discloses an information processing system which displays the details of a document of the web content or the like on a display condition such as desired font size, line spacing, and character spacing without disturbing the original layout of the web content.  
      According to the above mentioned apparatus, weighting is performed for the contents of a document such as the web content displayed on the display device, and then the important phrases (characters) are enlarged and the phrases (characters) with low weight are deleted on the basis of the weighting to make a summary. Thus, the above mentioned apparatus prevents the overall layout of the web page from being disturbed.  
      However, according to the above mentioned apparatus, the user reviews the web page in which the parts with low weight has been already deleted by the display device. Therefore there is a possibility that the important parts for the user are deleted before the user reviews the content, because it is not clear that these deleted parts are really unnecessary for the user.  
     BRIEF SUMMARY OF THE INVENTION  
      An embodiment of the present invention provides a television broadcast receiving apparatus, a television broadcast receiving system and a display control method which can enlarge the display content of the web page without disturbing the layout of the web page and without deleting the display information in the web page so that the user can easily recognize the web content.  
      According to an embodiment of present invention there is provided a TV broadcast receiving apparatus, connected to a display device having a screen panel, for displaying an image screen according to the received TV broadcast channel on the screen panel of said display device at a predetermined aspect ratio. The apparatus has a receiving unit for receiving a web content from an external server via a communication network a generating unit for generating a browser screen according to the content that is received by said receiving unit; and controller for controlling the display information that is designated to be enlarged by a user on the displayed browser screen, such that the enlarged information is displayed on a display area where the browser screen is not displayed in the screen panel while simultaneously displaying the browser screen generated by said generating unit at the predetermined aspect ratio.  
      According to yet another embodiment of present invention there is provided a TV broadcast receiving system having a TV broadcast receiving apparatus, for receiving a TV broadcast channel signal and a display device having a first display panel which displays an image screen according to the received TV broadcast channel signal and a second transparent display panel that is disposed at a position at least partially overlapping the first display panel and displays the character information. The system has a receiving unit for receiving a web content from an external server via a communication network; a generating unit for generating a browser screen according to the content that is received by the receiver unit; and a controller for controlling the browser screen generated by said generating unit to be displayed on said first display panel, and controlling the display information designated by a user on said browser screen displayed on said first display panel when an instruction for enlarging is inputted from the user and displayed on the second display panel.  
      According to yet another embodiment of present invention, a display control method is provided in a TV broadcast receiving apparatus which is connected to a display device having a screen panel for displaying an image screen according to a received TV broadcast channel at a predetermined aspect ratio. The method includes generating a browser screen according to the web content that is received from an external server via a communication network; displaying the generated browser screen on said screen panel at the predetermined aspect ratio; controlling the display information to be enlarged and that is designated by a user on the displayed browser screen; and displaying the enlarged display information on a display area where the browser screen is not displayed in the screen panel.  
      According to another embodiment of present invention, a display control method is provided in a TV broadcast receiving system having a TV broadcast receiving apparatus, connected to the TV service receiving apparatus, for receiving a TV broadcast channel signal and a display device having a first display panel which displays an image screen according to the received TV broadcast channel signal and a second transparent display panel that is disposed at a position at least partially overlapping the first display panel and displays character information. The method includes generating a browser screen according to web content that is received from an external server via a communication network; displaying the generated browser screen on said first display panel, and enlarging the information designated by a user on the browser screen displayed on the first display panel so that the enlarged information is displayed on the second display panel.  
    
    
     BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING  
      The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention, and together with the general description given above and the detailed description of the embodiments given below, serve to explain the principles of the invention in which:  
       FIG. 1  is a block diagram of a TV broadcast receiving system A including a Television broadcast receiving apparatus according to an embodiment of the present invention;  
       FIG. 2  is a block diagram showing an embodiment of the configuration of a TV broadcast receiving apparatus  12 ;  
       FIG. 3  is a schematic view showing an embodiment of an appearance and key arrangement of a remote controller  16 ;  
       FIG. 4  is a front view showing the TV broadcast receiving system A that a television image is displayed on a monitor  13 ;  
       FIGS. 5A and 5B  are views showing an example of a screen of a web content displayed on the monitor  13 ;  
       FIG. 6  is a view showing an example of an enlarged screen of the web content displayed on the monitor  13 ;  
       FIG. 7  is a front view showing the TV broadcast receiving system A that the web content is displayed on other example of the monitor  13 ;  
       FIGS. 8A and 8B  are views showing an example of an enlarged screen of the web content displayed on the monitor  13  shown in  FIG. 7 ;  
       FIGS. 9A and 9B  are views showing another example of an enlarged screen of the web content displayed on the monitor  13  shown in  FIG. 7 ;  
       FIG. 10  is a view showing other example of an enlarged screen of the web content displayed on the monitor  13  shown in  FIG. 7 ;  
       FIG. 11  is a flowchart showing a processing method for enlarging the details of the web content performed by the TV broadcast receiving apparatus  12 ;  
       FIG. 12  is a view showing an example of an enlarged screen of the bitmap image information in the web content displayed on the monitor  13 ;  
       FIG. 13  is a view showing other example of an enlarged screen of the bitmap image information in the web content displayed on the monitor  13 ;  
       FIG. 14  is a flowchart showing a processing method for enlarging the above-described bitmap image information in the web content performed by the TV broadcast receiving apparatus  12 ;  
       FIGS. 15A and 15B  are views showing other example of an enlarged screen of the bitmap image information in the web content displayed on the monitor  13 ;  
       FIGS. 16A and 16B  are views showing other example of an enlarged screen of the bitmap image information in the web content displayed on the monitor  13 ;  
       FIG. 17  is a flowchart showing other processing method for enlarging the above-described bitmap image information in the web content performed by the TV broadcast receiving apparatus  12 ;  
       FIG. 18  is a block diagram showing an embodiment of the configuration of a TV broadcast receiving apparatus  60 ;  
       FIG. 19  is a view showing a screen of a web content displayed on the monitor  13  shown in  FIG. 18 ;  
       FIG. 20  is a view showing an example of an display screen on which the web content is displayed on a screen panel  63   a  and which the character information is enlarged on a transparent panel  63   b;    
       FIG. 21  is a view showing other example of an display screen on which the web content is displayed on a screen panel  63   a  and which the character information is enlarged on a transparent panel  63   b;  and  
       FIG. 22  is a flowchart showing a processing method for enlarging the above-described character information which is selected in the web content performed by the TV broadcast receiving apparatus  60 . 
    
    
     DETAILED DESCRIPTION OF THE INVENTION  
      Embodiments of the invention will be described with reference to the accompanying drawings.  
       FIG. 1  shows is a block diagram of a TV broadcast receiving system A including a television broadcast receiving apparatus  12  according to an embodiment of the present invention.  
      As shown in  FIG. 1 , the TV broadcast receiving system A is configured by an antenna  11 , a TV broadcast receiving apparatus  12 , a monitor  13  as a display device, and a speaker  14 . In addition, a remote controller  16  is further provided, whereby the user indicates various operations of the TV broadcast receiving apparatus  12  by remote control.  
      The antenna  11  receives airwaves and outputs TV broadcast signal to the TV broadcast receiving apparatus  12 . The TV broadcast receiving apparatus  12  generates the original image signal and sound signal by performing channel selection processes and decoding processes or the like to the inputted TV broadcast signal.  
      The TV broadcast receiving apparatus  12  supplies the decoded image signal to the monitor  13  and supplies the decoded sound signal to the speaker  14 . The monitor  13  displays the inputted image signal and the speaker  14  reproduces the inputted sound signal.  
      The TV broadcast receiving apparatus  12  is connected to a network  15  such as the Internet. The TV broadcast receiving apparatus  12  obtains the desirable information from an external server  17  by accessing the network  15 , and then supplies the image component of the obtained information to the monitor  13 , and supplies the sound component thereof to the speaker  14 .  
      When the TV broadcast receiving apparatus  12  receives the instruction to access the network from the user while receiving a prescribed TV broadcast channel, the TV broadcast receiving apparatus  12  switches access to the network  15 , and then displays the image component of the information such as the web content that is obtained from the network  15  on the monitor  13 , and reproduces the sound component thereof at the speaker  14 .  
      In addition, when the TV broadcast receiving apparatus  12  receives the instruction for the TV broadcast channel from the user while accessing the network  15 , the TV broadcast receiving apparatus  12  generates the original image signal and sound signal by performing channel selection processes and decoding processes or the like of the instructed inputted TV broadcast channel to the inputted TV broadcast signal. Then the monitor  13  displays the decoded image signal and the speaker  14  reproduces the decoded sound signal.  
      As described above, the TV broadcast receiving apparatus  12  according to the present embodiment can switch to any one of the display of the TV broadcast channel and the display of the web content information. Furthermore, not limited to this, as described later, the TV broadcast receiving apparatus  12  can display two screens simultaneously side-by-side, including the TV broadcast channel on one screen and the web content information on the other screen.  
       FIG. 2  is a block diagram showing an embodiment of the configuration of a TV broadcast receiving apparatus  12 . As shown in  FIG. 2 , in the TV broadcast receiving apparatus  12 , the TV broadcast signals that are received by the antenna  11  are supplied to a channel selection processing unit  22  via an input terminal  21 .  
      This channel selection processing unit  22  selects the TV signal of a desirable broadcast channel from the inputted TV broadcast signals, and outputs this selected TV signal to an input image processing unit  23  and an input sound processing unit  24 , respectively.  
      The input image processing unit  23  performs the decode processing to the image component of the inputted TV signal, and then outputs the image signal decoded in fields or frames to an output image processing unit  25 . The input sound processing unit  24  performs the decode processing to the sound component of the inputted TV signal, and then outputs the decoded sound signal to an output sound processing unit  26 .  
      A control unit  27  controls all operations of the TV broadcast receiving apparatus  12  including the operations to be described later generally. The control unit  27  is connected to a key processing unit  35 . The control unit  27  receives the operation information inputted from the key processing unit  35  and controls each circuit so that the operation contents are reflected thereon.  
      The control unit  27  has a web browser processing unit  37 . The control unit  27  can perform various processing in the web browser processing unit  37  by starting up HTML (Hypertext Markup Language) software that is stored in a memory  38 , and can display the image signal forming the browser screen on the monitor  13  via the output image processing unit  25 .  
      The web browser processing unit  37  has a layout display processing unit  28 , a markup language processing unit  29 , and a focus event processing unit  30 . The web browser processing unit  37  decodes the web content that is described by the markup language and reproduces the layout. The web browser processing unit  37  generates the access request to the network  15  and transmits the access request to the network  15  via a communication processing unit  32  and a connection terminal  31 .  
      The web content obtained from the network  15  is supplied to a markup language processing unit  29  via the connection terminal  31  and the communication processing unit  32 . The markup language processing unit  29  performs a process of analyzing the markup language of the inputted web content, and then outputs the analysis result to the layout display processing unit  28 .  
      The layout display processing unit  28  determines layout coordinates on the basis of the inputted analysis result. Then the layout display processing unit  28  generates a bitmap image signal to be displayed, and outputs it to the output image processing unit  25 . The layout display processing unit  28  generates a sound signal such as a sound effect, and outputs it to the output sound processing unit  26 .  
      The layout display processing unit  28  is connected to a font processing unit  34 . The layout display processing unit  28  reads the font processing unit  34  to draw the characters when the layout display processing unit  28  generates a bitmap image signal.  
      The focus event processing unit  30  is connected to the key processing unit  35  to judge the operation information on the basis of the key information that is inputted from an operation part (not illustrated) and/or the remote controller  16 . The operation part may be understood to duplicate most of the main operator selectable functions provided on the remote controller  16 , but the operation part is physically a part of the TV broadcasting receiving apparatus  12 .  
      The focus event processing unit  30  outputs the information relating to change of the layout in response to the operation information that is inputted from the key processing unit  35  to the layout display processing unit  28 .  
      When the operation information in response to, for example, a move key (upper, lower, right and left key)  108  of the remote controller  16  is inputted from the operation processing unit  35 , the focus event processing unit  30  extracts an element that is a target to be enlarged and then outputs this extracted information and the information to designate this enlargement to the layout display processing unit  28 .  
      When the extracted information from the focus event processing unit  30  is inputted, the layout display processing unit  28  determines the layout coordinates that are changed so as to enlarge the parts corresponding to the extracted information among the layout coordinates on the basis of the analysis result inputted from the markup language processing unit  29 , and then generates the bitmap information to be displayed.  
      The output image processing unit  25  converts the bitmap information that is supplied from the layout display processing unit  28  into an image signal. Then, the output image processing unit  25  selectively outputs the image signal supplied from the input image processing unit  23  and the image signal of which bitmap information is converted to the monitor  13  via an output terminal  41  (or may superimpose both image signals) to display the image.  
      The output sound processing unit  26  selectively outputs the sound signal supplied from the input sound processing unit  24  and the sound signal supplied from the layout display processing unit  28  to the speaker  14  via an output terminal  42  (or may superimpose both sound signals) to reproduce the sound.  
      The memory  38  is configured as a read only memory storing a control program to be executed by the control unit  27  therein, a random access memory for providing an operational area to the control unit  27 , and a nonvolatile memory storing various setting information and control information therein or the like.  
      According to the present embodiment, the memory  38  stores an aspect ratio upon displaying the TV broadcast channel and the web content information, the setting information related to the enlarging area upon enlarging a portion of a browser screen to be described later, the information related to a reduction ratio of the image signal configuring the browser screen, or the information related to the moving display upon displaying the browser screen while displacing it.  
      With respect to the aspect ration, if a width and height ratio of a screen panel provided on the monitor  13  is width 4: height 3, the aspect ratio 4:3 is set in the memory  38 . Therefore when the browser screen is reduced, the reduction processing is performed so as to maintain the aspect ratio of 4:3.  
      On the other hand, if the width and height ratio of the screen panel set in the monitor  13  is width 16: height 9, that is the width ratio of a wide TV size, the aspect ratio 16:9 is set in the memory  38 . Therefore when the browser screen is reduced, the reduction processing is performed so as to maintain the aspect ratio of 16:9.  
       FIG. 3  is a schematic view showing an embodiment of an appearance and key arrangement of a remote controller  16 . As shown in  FIG. 3 , the remote controller  16  has, for example, a power source key  101 , a one-touch channel selection key group  102 , a receiving mode shift key group  103 , a channel up down key  104 , a volume adjustment key  105 , a return key  106 , a exit key  107 , a move key  108 , a enter (decision) key  109 , a menu key  110 , and an internet key  111  or the like.  
      The power source key  101  is a key for turning on/off the power source of the TV broadcast receiving apparatus  12 . The one-touch channel selection key group  102  is a numeric key that is configured by 1 to 12 keys to be used for shifting a receiving channel or for inputting the numeric data. The receiving mode shift key group  103  is a key to shift the receiving mode upon watching the TV broadcast programs.  
      The channel up down key  104  is a key for selecting a TV channel by the up/down operation. The volume adjustment key  105  is a key to increase or reduce the volume. The return key  106  is a key to instruct to return to the last display state. The exit key  107  is a key to instruct to close the processing during execution.  
      The move key  108  is a key to select the items on the screen or to instruct movement of a cursor indicating a desirable position on the screen. The enter key  109  is a key to instruct registration of the item selected by the cursor. The menu key  110  is a key used to display a menu screen selecting various menus. The internet key  111  is a key used to start up an HTML browser.  
      Referring to FIGS.  4  to  10 , in the TV broadcast receiving system A and the TV broadcast receiving apparatus  12 , the processing for enlarging the details of the web content so that the user can easily recognize it while maintaining the layout of the web content will be described below.  
       FIG. 4  to  9  are views showing the browser screen of the web content displayed on the monitor  13  and its enlarged display screen.  
      As shown in  FIG. 4 , the monitor  13  has a screen panel composed of a displayable region R (a height size a, a width size b: a&lt;b). The displayable region R has an image display region P 1  for displaying the TV picture image and image nondisplay regions X 1  and X 2  where the TV picture image are not displayed and the characters of the enlarged font size are displayable.  
      The monitor  13  is set that the image display region P 1  (a height size c, a width size d: c&lt;d, a&gt;c, b&gt;d) is smaller than the displayable region R in the screen panel. In the displayable region R of the monitor  13 , the image nondisplay regions X 1  and X 2  are formed at right and left parts of the image display region P 1 . Such an orientation may be suitable for displaying text in a vertical format as shown for example in  FIG. 5B . Alternatively, upper and lower horizontally oriented nondisplay regions may be used for displaying text in a horizontal orientation. The enlarging processing adapted to the monitor  13  having such a screen panel as shown in  FIG. 4  will be described below.  
      According to the present embodiment, as shown in  FIG. 5 (B) and  FIG. 6 , the browser screen is displayed on the image display region P 1  of the monitor  13 . Moreover, one of the image nondisplay regions X 1  and X 2  or both of them can be utilized as enlarging regions Y 1  and Y 2 . Therefore the details of the web content displayed on the browser screen is enlarged on the image nondisplay regions X 1  and X 2  (that is the enlarging regions Y 1  and Y 2 ).  
      When the TV broadcast receiving apparatus  12  receives the user&#39;s instruction when the TV image screen is displayed on the monitor  13  as shown in  FIG. 4 , the display screen is switched in accordance with the user instruction. As the result, an initial screen of the web content is displayed on the monitor  13  as shown in  FIG. 5 (A), and then the item of “interviews of performers” in the web content is selected by the cursor.  
      From this initial screen display state, the user may move the cursor by using the move key  108  of the remote controller  16 . Then, the TV broadcast receiving apparatus  12  judges the character of the moving destination of the cursor that is a target element to be enlarged on the basis of the operation information of this move key  108 . As the result, as shown in  FIG. 5 (B), the TV broadcast receiving apparatus  12  displays the character of the moved destination of the cursor on the enlarging regions Y 1  and Y 2  in a larger font size.  
      In this case, the aspect ratio of the image display region P 1  (a width size d, a height size c: a&gt;c, b&gt;d) is not changed. Accordingly, the aspect ratio and the entire layout of the web content displayed on the image display region P 1  are not changed, so that the user can review the web content without any sense of discomfort and can easily recognize the location of the enlarged portion in relation to its position on the web page as a whole.  
       FIG. 6  is a view showing other example of the enlarging processing when the enlarging processing is adapted to the monitor  13  having the image nondisplay regions X 1  and X 2  as shown in  FIG. 4 .  
      According to the present embodiment, in the displayable region R of the monitor  13 , a place displayed by the image display region P 1  is moved horizontally by a prescribed amount. Therefore, the image nondisplay regions X 1  and X 2  are connected to each other on the same side of the display, so that the image nondisplay regions X 1  and X 2  are contiguous and can be utilized as a single enlarging region Y 3 .  
      In this case, the aspect ratio of the image display region P 1  (a width size d, a height size c: a&gt;c, b&gt;d) is not changed. Moreover, it is possible to secure the range larger than the case shown in  FIGS. 5A and 5B  as the enlarging region Y 3 . Hence, the aspect ratio and the entire layout of the web content displayed on the image display region P 1  is not changed, so that the user can review the web content without any sense of discomfort and can easily recognize the location of the enlarged portion in relation to its position on the web page as a whole.  
      As shown in  FIG. 7 , the enlarging processing adapted to the monitor  13  having a screen panel which not capable of displaying characters of an enlarged font size at the right and left (or the upper and lower) parts of the image display region P 1  (the height size c, the width size d: c&gt;d) in the displayable region R will be described below. The display method shown in  FIGS. 8A and 8B  and  FIG. 10  is also adaptable to the monitor  13  used in FIGS.  4  to  6 .  
      According to the present embodiment, the usable image nondisplay range is not sufficient to display the desired enlargements of the selected sections of the web page. Therefore enlarging regions Y 4 , Y 5 , Y 6 , Y 7  or Y 8  are provided by reducing the size of the image display region P 1  into a reduced image display region P 2  (the width size f, height size e:e&lt;f, c:d=e 1 :f 1 =e 2 :f 2 =e 3 :f 3 =e 4 :f 4 ) without changing of the aspect ratio (d:c) of the image display region P 1 .  
      In  FIG. 8 (A), the reduced image display region P 2  displaying the browser screen of the aspect ratio (d:c=f 1 :e 1 ) is arranged at a center upper part in the displayable region R, so that the image nondisplay region formed at the lower part in the displayable region R is utilized as the enlarging region Y 4  shaped as a horizontally long rectangle.  
      In  FIG. 8 (B), the reduced image display region P 2  displaying the browser screen of the aspect ratio (d:c=f 2 :e 2 ) and a reduced image display region P 3  displaying the TV picture image are arranged side-by-side at the center upper part in the displayable region R, so that the image nondisplay region formed at the lower part in the displayable region R is utilized as the enlarging region Y 5  shaped as a horizontally long rectangle.  
      In this case, since the TV picture image P 3  is also displayed, the browser screen P 2  is displayed smaller, so that the user can easily recognize the web content by enlarging the place designated by the user on the browser screen.  
      In  FIG. 9 (A), the reduced image display region P 2  displaying the browser screen of the aspect ratio (d:c=f 2 :e 2 ) is arranged at a center lower part in the displayable region R, so that the image nondisplay region formed at the upper part in the displayable region R is utilized as the enlarging region Y 6  shaped as a horizontally long rectangle.  
      In  FIG. 9 (B), the reduced image display region P 2  displaying the browser screen having the aspect ratio (d:c=f 3 :e 3 ) and a reduced image display region P 3  displaying the TV picture image are arranged side-by-side at the center upper part in the displayable region R, so that the image nondisplay region formed at the upper part in the displayable region R is utilized as the enlarging region Y 7  shaped as a horizontally long rectangle.  
      In this case, since the TV picture image P 3  is also displayed, the browser screen P 2  is displayed smaller, so that the user can easily recognize the web content by enlarging the place designated by the user on the browser screen. In addition, the enlarging method shown in  FIGS. 8A and 8B  and  FIGS. 9A and 9B  is effective particularly in enlarging horizontally written characters in the web content.  
      In  FIG. 10 , the reduced image display region P 2  displaying the browser screen of the aspect ratio (d:c=f 1 :e 1 ) in the displayable region R is shifted from a center to a lateral direction to be arranged on one side portion, so that the image nondisplay region formed at other side portion is utilized as the enlarging region Y 8  shaped as a horizontally long rectangle. The enlarging method shown in  FIG. 10  is effective particularly in enlarging vertically written characters in the web content.  
      In other words, as shown in  FIG. 7 , it is assumed that the item of “interviews of performers” is selected by the cursor under the state that the initial screen of the web content is displayed on the monitor  13 .  
      From this initial screen display state, the user may move the cursor by using the move key  108  of the remote controller  16 . Then, the TV broadcast receiving apparatus  12  judges the characters highlighted by the moved cursor which is the target element to be enlarged on the basis of the operation information of this move key  108 . As the result, the TV broadcast receiving apparatus  12  displays the character of the moved destination of the cursor on the enlarging regions Y 4  to Y 8  in a larger font size according to any enlarging method from among FIGS.  8  to  10 .  
      Therefore, the enlarging regions Y 4  to Y 8  are provided by reducing the browser screen into the reduced image display region P 2  (a width size f, a height size e: e&lt;f, d:c=f 1 :e 1 +f 2 :e 2 =f 3 :e 3 =f 4 :e 4 ) having the same ratio as the aspect ratio (d:c) of the image display region P 1 .  
      Hence, the aspect ratio and the entire layout of the web content displayed on the image display region P 1  are not changed, so that the user can review the web content without any sense of discomfort and can easily recognize the location of the enlarged portion in relation to its position on the web page as a whole.  
       FIG. 11  is a flowchart showing a processing method for enlarging the details of the web content performed by the TV broadcast receiving apparatus  12 .  
      In the TV broadcast receiving apparatus  12 , a prescribed TV broadcast channel is selected on the basis of the channel selection operation by the user from the operation part (not illustrated) and/or the remote controller  16 . Then, the image of that broadcast program is displayed on the monitor  13  and the sound is reproduced by the speaker  14  as shown in  FIG. 4 .  
      When the user selects the display of the web browser from the internet key  111  of the remote controller  16  (or comparable key on the operation part of the TV broadcast receiving apparatus  12 , while watching a TV broadcast program, the control unit  27  performs starting up the web browser in response to the operation information related to starting up of the web browser that is inputted from the key processing unit  35  (step ST  11 ).  
      If the web browser is started in ST  11 , the web browser processing unit  37  transmits the access request on the basis of the initialized URL information via the communication processing unit  32 , and then obtains the web content (the markup language) and the image from the network  15  (step ST  12 ).  
      Then, the markup language processing unit  29  of the web browser processing unit  37  performs processes analyzing the markup language of the markup language obtained in ST  12 , and outputs the analysis result to the layout display processing unit  28  (step ST  13 ).  
      Receiving the analysis result of ST  13 , the layout display processing unit  28  determines layout coordinates of the all screens by using the font processing unit  34 . Then, the layout display processing unit  28  generates the bitmap information, and outputs it to the output image processing unit  25 . The layout display processing unit  28  generates a sound signal such as a sound effect and outputs it to the output sound processing unit  26  (step ST  14 ).  
      The output image processing unit  25  converts the bitmap information supplied from the layout display processing unit  28  into an image signal. Then, the output image processing unit  25  displays the image signal on the monitor  13  as the initial screen via the output terminal  41  as shown by  FIG. 5 (A) or  FIG. 7  (step ST  15 ).  
      It is assumed that the user shifts the cursor by using the move key  108  of the remote controller  16  when the initial screen of the web content is displayed in ST  15 . Then, the key processing unit  35  supplies the operational information corresponding to the move key  108  to the focus event processing unit  30 .  
      The focus event processing unit  30  extracts the character of the moved destination of the cursor as a new target element of enlargement on the basis of the operational information corresponding to the inputted move key  108 . Then The focus event processing unit  30  outputs this extracted information and the information to cause enlargement to the layout display processing unit  28  (step ST  16 ).  
      The layout display processing unit  28  determines the layout coordinates that are changed so as to enlarge the place corresponding to the extracted target element on the basis of the extraction information inputted from the focus event processing unit  30 . The layout display processing unit  28  outputs the bitmap information thereof to the output image processing unit  25  (step ST  17 ).  
      The output image processing unit  25  converts the bitmap information supplied from the layout display processing unit  28  into the image signal. And then in response to the type of the monitor  13 , as shown in any one of  FIG. 5 (B),  FIG. 6 ,  FIGS. 8A and 8B  to  FIG. 10 , the output image processing unit  25  displays the web browser screen including the newly enlarged display on the monitor  13  (step ST  18 ).  
      If the user performs the key operation of the remote controller  16  under the display state of ST  18 , the key processing unit  35  judges the operational information corresponding to the key operated by the user, and supplies this operational information to the control unit  27  and the focus event processing unit  30  (Yes of step ST  19 ).  
      If this operational information corresponds to the move key  108  (Yes of step ST  20 ), control returns to the processing of ST  16  in which the focus event processing unit  30  extracts the target element of the new enlarged display, and outputs it to the layout display processing unit  28  (step ST  16 ).  
      In addition, if the operational information is judged to require change of content (No in step ST  20 , No in ST  21 , Yes in ST  22 ), control is returned to the processing of ST  12  in which the web browser processing unit  37  transmits the access request on the basis of the new URL information via the communication processing unit  32  and obtains the web content (the markup language) and the image from the network  15  (ST  12 ).  
      In addition, if the operational information is judged to be the operational information other than change of content and closing of the web browser (No in step ST  20 , No in ST  21 , No in ST  22 ), control is returned to the processing of ST  19  in which the browser screen is placed in the stand-by state of the key operation by the user.  
      In addition, if the operational information is judged to request closing of the web browser (No in step ST  20 , Yes in step ST  21 ), the control unit  27  closes the web browser (step ST  23 ), and as shown in  FIG. 4 , the control unit  27  starts to watch the TV broadcast program that was received before (i.e., before switching to web access.  
      As described above, according to the present embodiment, it is possible to enlarge the place designated by the user without changing the size or the width to height ratio (the aspect ratio) of the web browser screen that is originally displayed on the image display region.  
      Accordingly, since the displayed entire layout of the web content is not influenced (is not broken down), the user can review the web content without a sense of discomfort and can easily recognize the location of the enlarged portion in relation to its position on the web page as a whole. Thus, it is possible to greatly improve convenience of operation and viewing by the user.  
      Next, with reference to FIGS.  12  to  17 , a method to enlarge the bitmap image information located in the web content by the above-described TV broadcast receiving system A and the TV broadcast receiving apparatus  12  will be described below.  
      According to the present embodiment, the method to enlarge the bitmap screen in the case that the method is adopted to the monitor  13  set as the above-described enlargement screen shown in  FIG. 6  will be explained, however, the present embodiment is not limited to this.  
       FIG. 12  and  FIG. 13  are views showing an example of an enlarged screen displayed on the monitor  13 . According to the present embodiment, the size of the bitmap image that can be enlarged in the enlarging region Y 3  is limited in advance, and a reference value is stored in the memory  38  in advance.  
      In this case, it is defined that a size of a “bitmap Y” image  51  is in the range of the preset reference value, and a size of a “bitmap X” image  52  is beyond the range of this reference value.  
      If the user shifts the cursor by using the move key  108  of the remote controller  16  and the bitmap image is selected, the control unit  27  compares this bitmap image with the reference value stored in the memory  38 . If the bitmap image is judged to be smaller than this reference value (namely, within a parameter), the control unit  27  converts the bitmap image to be enlarged and displays the enlarged bitmap image on the enlarging region Y 3 .  
       FIG. 12  shows the enlarged screen display of the monitor  13  when the user selects the “bitmap Y” image  51  by the cursor. As shown in  FIG. 12 , the size of the “bitmap Y” image  51  selected by the cursor is smaller than the reference value, namely, is within the parameter, so that an enlarged bitmap image  53  is displayed within the enlarging region Y 3 .  
       FIG. 13  shows the enlarged screen display of the monitor  13  when the user selects the “bitmap X” image  52  by the cursor. As shown in  FIG. 13 , the size of the “bitmap X” image  52  selected by the cursor is larger than the reference value, namely, is beyond the parameter, so that no image is displayed in the enlarging region Y 3 .  
      Thus, by setting the reference value of the bitmap image capable of being enlarged in advance in accordance with the size of the enlarging region, the user can easily recognize not only the text information but also the bitmap image information that is enlarged without changing the aspect ratio of the browser screen displayed on the image display region P 1  and the entire layout of the web content.  
       FIG. 14  is a flow chart for showing a processing method for enlarging the above-described bitmap image information of the web content in the TV broadcast receiving apparatus  12 . The processing steps which are the same as those of the flow chart of  FIG. 11  are given the same step numbers and the explanation of these processing steps are omitted.  
      In the TV broadcast receiving apparatus  12 , if the web browser is started by the control unit  27  on the basis of the instruction of the user (ST  11 ), the web browser processing unit  37  obtains the web content and the image from the network  15  (ST  12 ), then performs processes analyzing the markup language (ST  13 ), and determines the layout coordinates of the entire screen (ST  14 ).  
      Then, according to the processing due to the output image processing unit  25 , the initial screen of the web content converted into the image signal is displayed on the monitor  13  (ST  15 ).  
      If the user moves the cursor during displaying this initial screen, the focus event processing unit  30  extracts the moved destination of the cursor as a new target element for enlargement (ST  16 ).  
      When extracted destination in ST  16  is text information (No in step ST  31 ), the process goes to the processing step of ST  17 , and the same processing as described in the flow chart shown in  FIG. 11  will be carried out.  
      If the extracted destination in ST  16  is a bitmap image (Yes in step ST  31 ), the focus event processing unit  30  compares this extracted destination with the reference value having the predetermined size of the bitmap image, and determines whether the extracted destination is within the parameter of this reference value (step ST  32 ).  
      As a result of this detection, if the extracted destination is judged to be a bitmap image beyond the parameter (No in step ST  32 ), the process goes to the processing step of ST  19 , and the browser screen goes into a stand-by state.  
      As a result of determination in ST  32 , if the extracted place or destination is determined to be a bitmap image within the stored parameter value (Yes in ST  33 ), the focus event processing unit  30  outputs the extraction information corresponding to the bitmap image and the information instructing enlargement to the layout display processing unit  28 .  
      The layout display processing unit  28  determines the layout coordinates that are changed so as to enlarge the place corresponding to the extracted target element on the basis of the extraction information inputted from the focus event processing unit  30  and outputs the bitmap information to the output image processing unit  25  (ST  17 ).  
      The output image processing unit  25  converts the bitmap information supplied from the layout display processing unit  28 , and displays the web browser screen including a new enlarged display on the monitor  13  as shown in any one of FIGS.  12  to  15  (ST  18 ). Hereinafter, the same processing described in the flow chart shown in  FIG. 11  will be carried out.  
      FIGS.  15  to  16  illustrate other example of the enlarged screen that is displayed on the monitor  13 . According to an embodiment of the present embodiment, when the user selects the bitmap image by moving the cursor using the move key  108  of the remote controller  16 , characters located in the selected bitmap image may be recognized by conventional character recognition software and the recognized characters are enlarged on the enlarging region and displayed as text.  
      In this case, the “bitmap Y” image  51  includes the image of the character as “bitmap Y” and the “bitmap X” image  52  includes the image of the character as “bitmap X”.  
       FIGS. 15A and 15B  show the enlarged screen display of the monitor  13  when the user selects the “bitmap Y” image  51  by the cursor. As shown in  FIG. 15B , if the “bitmap Y” image  51  is selected by the cursor, the character of “bitmap Y” located in the “bitmap Y” image  51  is recognized as character data and the recognized character data of “bitmap Y” is displayed as text on the enlarging region Y 3  in an enlarged font size.  
       FIGS. 16A and 16B  show the enlarged screen display of the monitor  13  when the user selects the “bitmap X” image  52  by the cursor. As shown in  FIG. 16B , if the “bitmap X” image  52  is selected by the cursor, the character of “bitmap X” located in the “bitmap X” image  52  is recognized as character data and the recognized character data of “bitmap X” is displayed as text on the enlarging region Y 3  in the enlarged font size.  
      As a result, not only the bitmap image including the text information, but also the character information located in the web content can be easily recognized by enlargement without changing the aspect ratio of the browser screen that is displayed on the image display region P 1  and the entire layout of the web content.  
       FIG. 17  is a flow chart for showing a processing method for enlarging the above-described bitmap image information of the web content in the TV broadcast receiving apparatus  12 . The processing steps which are the same as those of the flow chart shown in  FIG. 11  and  FIG. 14  are given the same step numbers and the explanation of these processing steps are omitted.  
      In the TV broadcast receiving apparatus  12 , if the user moves the cursor during displaying an initial screen in ST  15 , the focus event processing unit  30  extracts the moved destination of the cursor as a new target element of enlargement (ST  16 ).  
      When this place extracted in ST  16  is text information (No in step ST  31 ), the program proceeds to the processing step of ST  17 , in which the same processing as described in the flow charts shown in  FIG. 11  and  FIG. 14  is carried out.  
      When the place extracted in ST  16  is a bitmap image (Yes in step ST  31 ), the focus event processing unit  30  performs the character recognition processing with respect to the bitmap image. Then the focus event processing unit  30  extracts the character located in the bitmap image (step ST  34 ), and outputs this recognized character information and the information instructing the enlargement to the layout display processing unit  28 . Then, proceeding to the processing step of ST  17 , the same processing described in the flow charts shown in  FIG. 11  and  FIG. 14  will be carried out.  
      As described above, according to the present embodiment, it is possible to enlarge the bitmap image that is designated by the user in the web content without changing the size of the web content and without changing the size or the width and height ratio of the web browser screen that is originally displayed on the image display region.  
      Accordingly, since the entire displayed layout of the web content is not effected (is not broken down), the user can review the web content without any sense of discomfort and can easily recognize the location of the enlarged portion in relation to its position on the web page as a whole. As a result, it is possible to improve convenience of the user.  
      With reference to FIGS.  18  to  22 , the processing for enlarging the details of the web content in a TV broadcast receiving apparatus  60  will be described below.  FIG. 18  is a block diagram showing an embodiment of a configuration of a TV broadcast receiving apparatus  60 , wherein the above-described configuration is partially modified (added). The functional blocks which are the same as those of the block diagram shown in  FIG. 2  are given the same reference numbers and the explanation of these blocks are omitted.  
      According to the present embodiment, the monitor  13  as a display device that is connected to the TV broadcast receiving apparatus  60  with wires or by wireless means is configured in such a manner that a screen panel  63   a  composed of a CRT monitor or the like to display an image signal and a transparent panel  63   b  capable of displaying at least the text information on its upper surface overlap each other.  
      This transparent panel  63   b  is mainly adopted to display the character information such as a caption and a teletext broadcast, and if the text information is displayed on the transparent panel  63   b,  the text information is displayed so as to overlap the image screen displayed on the monitor  13 .  
      As shown in  FIG. 18 , in the TV broadcast receiving apparatus  60 , the channel selection processing unit  22  outputs the selected TV signal to the input image processing unit  23  and the input sound processing unit  24  respectively. And further, the channel selection processing unit  22  outputs a character signal related to the selected TV signal to a input character processing unit  61 .  
      The input character processing unit  61  performs the decoding processing to the inputted character signal and outputs this character signal to an output character processing unit  62 .  
      The focus event processing unit  30  extracts an element as a target of enlargement when the operational information corresponding to a key to which a designation function of enlarging is allocated (for example, the enter key  109 ) is inputted from the key processing unit  35  therein, and outputs this extraction information to the layout display processing unit  28 .  
      The layout display processing unit  28  outputs the character information corresponding to the extraction information to the output character processing unit  62  on the basis of the analysis result inputted from the markup language processing unit  29  if the extraction information is inputted therein from the focus event processing unit  30 .  
      The control unit  27  is further connected to the output character processing unit  62 . The control unit  27  outputs control signal related to enlargement of the character to the output character processing unit  62  if the operational information corresponding to the key to which the designation function of enlarging is allocated is inputted from the key processing unit  35  therein.  
      The output character processing unit  62  converts the character information that is inputted from the layout display processing unit  28  into a enlarged character image signal on the basis of a control signal from the control unit  27 , and outputs this character image signal to the transparent panel  63   b,  and then enlarges the character information.  
      FIGS.  19  to  21  illustrate an example of the display screen wherein the web content is enlarged on the monitor  13  of the present embodiment and the character information is enlarged on the transparent panel  63   b.    
      As shown in  FIG. 19 , when the screen of the web content is displayed on the monitor  13 , the user operates a key to which a designation function of enlarging is allocated (for example, the enter key  109 ). Then, as shown in  FIG. 20  and  FIG. 21 , the character information at the place that is selected by the cursor is enlarged on the prescribed display region  64  on the transparent panel  63   b.    
       FIG. 22  is a flow chart showing a processing method for enlarging the above-described character information that is selected in the web content. The processing steps which are the same as those of the flow chart shown in  FIG. 11  are given the same step numbers and the explanation of these processing steps are omitted.  
      In the TV broadcast receiving apparatus  12 , if the web browser is started on the basis of the instruction of the user (ST  11 ), the web browser processing unit  37  obtains the web content and the image from the network  15  (ST  12 ), and performs processes analyzing the markup language (ST  13 ), and determines the layout coordinates of the entire screen (ST  14 ).  
      Then, according to the processing due to the output image processing unit  25 , the initial screen of the web content converted into the image signal is displayed on the monitor  13  (ST  15 ).  
      Under the display state of ST  15 , when the user performs the key operation of the remote controller  16 , the key processing unit  35  judges the operational information corresponding to the key that is operated by the user and supplies this operational information to the control unit  27  and the focus event processing unit  30  (Yes in step ST  19 ).  
      If this operational information is judged to correspond to the instruction of enlarging (Yes in step ST  20 ), the focus event processing unit  30  extracts the selection destination of the cursor as a target element of enlarging, and outputs the extracted selection destination to the layout display processing unit  28  (step ST  41 ).  
      The layout display processing unit  28  outputs the character information corresponding to the extraction information to the output character processing unit  62 . In addition, the control unit  27  outputs the control signal related to enlargement of the character to the output character processing unit  62  in response to the operational information of the key.  
      The output character processing unit  62  converts the character information that is inputted from the layout display processing unit  28  into the enlarged character image signal on the basis of the control signal from the control unit  27 , and outputs the character image signal to the transparent panel  63   b,  which then displays the enlarged character information (step ST  42 ).  
      In addition, if the operational information is judged to be the operational information other than the key for indicating enlarging and closing of the web browser (No in step ST  20 , No in ST  21 ), control returns to the processing of ST  19 , and the browser screen goes into a stand-by state.  
      In addition, if the operational information is judged to request closing of the web browser (No in step ST  20 , Yes in step ST  21 ), the control unit  27  closes the web browser (step ST  23 ), and controls the display of the TV broadcast program that was received before.  
      According to the present embodiment, by using the display device in which the screen panel  63   a  for displaying an image signal thereon and the transparent panel  63   b  capable of displaying at least the text information on its upper surface are arranged to overlap each other, the text portion of the web content that is selected by the cursor is enlarged on the transparent panel  63   b  in accordance with the designation of enlargement of the user.  
      Thus, without influencing the layout of the displayed web content, the user can review the web content and can recognize the portion designated by the cursor by enlarging that portion. As a result, it is possible to improve convenience of the user.  
      Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details, representative devices, and illustrated examples shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general invention concept as defined by the appended claims and their equivalents.