Abstract:
An apparatus for displaying a primary display and a window containing additional information is provided. The apparatus contains a display device, a displaying mechanism, and an exposing mechanism. The display device has a screen, and the displaying mechanism displays the primary display on the screen. The exposing mechanism generates and displays the window containing the additional information on the screen such that the window is located underneath the primary display while the primary display is displayed on the screen and is exposed by removing the primary display from on top of the window. A method which is performed by the apparatus is also provided.

Description:
FIELD OF THE INVENTION  
         [0001]    The present invention relates to an apparatus for selectively displaying additional information relating to program information and to a method employed by the apparatus. More particularly, the invention relates to an apparatus and method for displaying information relating to program information and contained in a window which is located “underneath” or “beside” the program information and which can be selectively displayed. The present invention may be illustratively embodied in a cable television system in which a detailed description of a particular program is contained in a window that is located underneath or beside an actual broadcast program, a menu, or other type of screen displayed on a television and which can be exposed when a viewer inputs an appropriate command to the system.  
         BACKGROUND OF THE INVENTION  
         [0002]    Early developments in television technology have been made to enable television systems to combine two or more types of media (e.g. text, graphics, video, etc.) and display the combined media as a single composite picture. The composite picture generated by such systems may include the names of television announcers, news flashes, or emergency broadcast messages superimposed over a television broadcast program. An example of a typical composite picture  500  in which a television announcer&#39;s name  502  and other related information  504  are superimposed upon a broadcast program  506  is shown in FIG. 7. More recent examples of forming a composite picture from two or more types of media include seemlessly blending animated text and graphics into a video program in order to present the illusion that human beings are interacting with cartoon characters.  
           [0003]    Superimposing additional information on broadcast programs becomes significantly more difficult if the information needs to be combined with a live broadcast program. In such case, the additional information must be superimposed on the program in real-time so that the composite picture is generated as the live television program is being broadcast. In order to combine the various media in real-time, studio facilities have been created, and producers in such facilities have to closely monitor the live broadcast program and superimpose the additional information “on the fly” to ensure that the information appropriately corresponds to the subject matter of the program currently being broadcast. However, creating a live composite broadcast program via the studio facilities is labor intensive and expensive.  
           [0004]    The display of additional information becomes more complicated when the information is to be displayed only when it is requested by a user. Such information is customarily called information “on-demand”. In this interactive case, the additional information is typically computer generated broadcast data that is synchronized with a corresponding video signal via a timer and is hidden from the user until it is requested. As a result, the information does not obscure or hide portions of the television screen when the user does not wish to view it.  
           [0005]    An example of displaying information “on-demand” may occur during a sports broadcast program. As the user is watching the sports program, he or she may press a button on a remote control to request the score of the televised sporting event to be displayed, even when the producer of the sports program has decided not to display it. When the button is pressed, a graphic overlay containing the score is superimposed over the sports program.  
           [0006]    One of the problems that exists with displaying additional information “on-demand” or as part of a composite broadcast picture is determining how to display the information on the screen together with the program. In the past, the additional information has been displayed in various manners.  
           [0007]    For instance, the information may simply be provided in an opaque window  600  over the broadcast program  602  as shown in FIG. 8. However, overlaying the opaque window  600  upon the program  602  hides a portion of the program  602  and thus, is not aesthetically pleasing to the user. In order to attempt to overcome the above disadvantages, some systems have displayed the information in a transparent or semi-transparent window  700  that is overlaid upon the broadcast program  702  as shown in FIG. 9. However, displaying the additional information in such manner often creates visual conflicts between the additional information and the program  702  and is confusing to the user. Similarly, the additional information has been superimposed upon the program in a moving transparent window to give the illusion that information is displayed on a transparent “ticker tape”. In such case, the information still conflicts with the broadcast program, and the movement of the information across the screen is distracting to the user.  
           [0008]    In addition to the methods above, the additional information may be displayed as shown in FIG. 10. In the figure, the broadcast program  800  is compressed in size to occupy only a portion of the screen, and the remaining portions  802  of the screen are used to display the additional information. Although this display method has some advantages, the broadcast program  800  must be compressed to display the additional information, and thus, fine visual details which are intended to be displayed when the program is broadcast on the entire screen may not be perceivable by the user.  
           [0009]    Accordingly, a need exists for a new method and apparatus for displaying additional information on a television which is aesthetically pleasing to the user.  
         SUMMARY OF THE INVENTION  
         [0010]    In order to overcome the problems above, an object of the present invention is to provide a new method and apparatus for displaying additional information on a television which is aesthetically pleasing to the user.  
           [0011]    To accomplish the above object, an apparatus for displaying a primary display and a window containing additional information is provided. The apparatus comprises a display device, a displaying means, and an exposing means. The display device has a screen, and the displaying means displays the primary display on the screen. The exposing means generates and displays the window containing the additional information on the screen such that the window is located underneath the primary display while the primary display is displayed on the screen and is exposed by removing the primary display from on top of the window.  
           [0012]    To further accomplish the above object, a method for displaying a primary display and a window containing additional information is provided. In the method, a primary display is displayed on a screen of a display, and a window containing the additional information is generated. The window is displayed on the screen such that the window is located underneath the primary display while the primary display is displayed on the screen and is exposed by removing the primary display from on top of the window. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0013]    The above objects and advantages of the present invention will become more apparent by referring to the detailed description of the preferred embodiments and the corresponding drawings in which:  
         [0014]    [0014]FIG. 1 is a block diagram of a cable television system;  
         [0015]    [0015]FIG. 2 is an example of a set top terminal contained in the cable television system illustrated in FIG. 1;  
         [0016]    [0016]FIG. 3A illustrates an electronic program guide (“EPG”) displayed via the set top terminal shown in FIG. 2;  
         [0017]    [0017]FIG. 3B illustrates the display of an initial portion of additional information on the screen according to a first embodiment of the present invention;  
         [0018]    [0018]FIG. 3C illustrates the display of a subsequent portion of the additional information on the screen according to the first embodiment of the present invention;  
         [0019]    [0019]FIG. 3D illustrates the display of all of the additional information on the screen according to the first embodiment of the present invention;  
         [0020]    [0020]FIG. 4A illustrates a broadcast program displayed via the set top terminal shown in FIG. 2;  
         [0021]    [0021]FIG. 4B illustrates the display of an initial portion of additional information on the screen according to a second embodiment of the present invention;  
         [0022]    [0022]FIG. 4C illustrates the display of a subsequent portion of the additional information on the screen according to the second embodiment of the present invention;  
         [0023]    [0023]FIG. 4D illustrates the display of all of the additional information on the screen according to the second embodiment of the present invention;  
         [0024]    [0024]FIG. 5A illustrates a broadcast program displayed via the set top terminal shown in FIG. 2;  
         [0025]    [0025]FIG. 5B illustrates the display of an initial portion of additional information on the screen according to a third embodiment of the present invention;  
         [0026]    [0026]FIG. 5C illustrates the display of a subsequent portion of the additional information on the screen according to the third embodiment of the present invention;  
         [0027]    [0027]FIG. 5D illustrates the display of all of the additional information on the screen according to the third embodiment of the present invention;  
         [0028]    [0028] 5 FIG. 6A illustrates a broadcast program or EPG displayed via the set top terminal shown in FIG. 2;  
         [0029]    [0029]FIG. 6B illustrates the display of an initial portion of additional information on the screen according to a fourth embodiment of the present invention;  
         [0030]    [0030]FIG. 6C illustrates the display of a subsequent portion of the additional information on the screen according to the fourth embodiment of the present invention;  
         [0031]    [0031]FIG. 6D illustrates the display of another subsequent portion of the additional information on the screen according to the fourth embodiment of the present invention;  
         [0032]    [0032]FIG. 6E illustrates the display of all of the additional information on the screen according to the fourth embodiment of the present invention;  
         [0033]    [0033]FIG. 7 illustrates a composite picture in which a television announcer&#39;s name and other related information are superimposed upon a broadcast program;  
         [0034]    [0034]FIG. 8 illustrates an opaque window which is overlaid upon a broadcast program and contains additional information;  
         [0035]    [0035]FIG. 9 illustrates a transparent window which is overlaid upon a broadcast program and contains additional information; and  
         [0036]    [0036]FIG. 10 illustrates a television screen in which the broadcast picture is compressed in size to occupy only a portion of the screen and the remaining portions of the screen are used to display additional information. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0037]    The following description of the preferred embodiments discloses specific configurations, components, graphic arrangements, etc. However, the preferred embodiments are merely examples of the present invention, and thus, the specific components and graphic arrangements described below are only used to more easily describe such embodiments and to provide an overall understanding of the present invention. Accordingly, one skilled in the art will readily recognize that the present invention is not limited to the specific components and values described below. Furthermore, the descriptions of various features and structures of the present invention which would be known to one skilled in the art are omitted for the sake of clarity and brevity.  
         [0038]    Broadcast systems (e.g. cable television systems) have been designed to broadcast information (e.g. television programs) to the homes of many subscribers. As shown in FIG. 1, a typical cable television system contains a cable headend  2 , a distribution network  4 , and a plurality of set top terminals  6 ,  8 , and  10 . The set top terminals  6 ,  8 , and  10  are respectively located in various user stations (e.g. homes, offices, hotels, etc.), and a television  12  is attached each one of the terminals  6 ,  8 , and  10 . (For the sake of clarity, FIG. 1 only shows one television  12  attached to the set top terminal  6 ).  
         [0039]    The headend  2  receives television programming from external sources (i.e. satellite broadcasts, cable broadcasts, magnetic tapes, laser discs, etc.) and/or generates television programming locally, and the programming is output to the distribution network  4 . The headend  2  also receives digital data from external sources and/or generates such data locally, and the data is likewise output to the distribution network  4 . The digital data may be inserted into and transmitted with the television programming. If the programming corresponds to analog television signals, the digital data may be inserted into the vertical blanking interval of the signals. On the other hand, if the programming corresponds to digital television signals, the digital data may be inserted into the signal in a multiplex fashion. Alternatively or additionally, the digital data may be transmitted to the distribution network  4  in parallel with the television programming on a separate dedicated frequency. The data may contain schedule information corresponding to various current and future broadcast programs as well as other types of data.  
         [0040]    The distribution network  4  outputs the television programming and digital data to the set top terminals  6 ,  8 , and  10  which process the information. An illustrative embodiment of a set top terminal is shown in FIG. 2 and contains first and second tuners  16  and  20 , a decoder/demodulator  18 , a central processing unit (“CPU”)  22 , a memory management unit (“MMU”)  24 , a random access memory (“RAM”)  28 , a read only memory (“ROM”)  30 , and a non-volatile RAM (“NVRAM”)  32 .  
         [0041]    The first tuner  20  is tuned to a dedicated channel on which the digital data containing the schedule information is transmitted. In an illustrative example, the schedule information contains the channel on which each of the available television programs will be broadcast, the time period during which each program will be broadcast, and the title of each program. Also, the schedule information contains a detailed program description for each program and a category which classifies each program. Once the schedule information is received by the tuner  20 , the CPU  22  stores it in the RAM  28 .  
         [0042]    The second tuner  16  receives a plurality of broadcast programs transmitted on a plurality of channels and selectively tunes to a particular channel based on a tuning control signal output from the CPU  22 . Furthermore, various information such as event code information may be embedded or otherwise incorporated in a broadcast program. The event code information identifies the program in which it is contained and is extracted from the program when the program is tuned by the tuner  16 . Then, the information is stored in the NVRAM  32 , periodically transmitted back to the head end  2  via a reverse data channel (not shown), and used for viewer programming statistics and billing purposes.  
         [0043]    As noted above, schedule information may be additionally or alternatively incorporated into the broadcast programs which are input by the tuner  16 . In such case, the information is extracted from the tuned programs and stored in the RAM  28 . Thus, the first tuner  20  is not required to input the schedule information and may be omitted from the set top terminal.  
         [0044]    The broadcast program tuned by the tuner  16  is output to the decoder/demodulator  18 . If the broadcast program corresponds to an analog video signal, the decoder/demodulator  18  decodes the signal via a particular process (e.g. an NTSC decoding process), and the decoded signal is converted into a digital signal via an analog/digital converter (not shown). On the other hand, if the broadcast program corresponds to a digital video signal, the decoder/demodulator  18  demodulates the signal via a certain process (e.g. a QAM demodulation process), and the demodulated signal is decompressed via a certain procedure (e.g. an MPEG-2 decompression procedure).  
         [0045]    The video signal output from the decoder/demodulator  18  is supplied to an encoder  38  via an on screen display (“OSD”) circuit  26  and encoded into an encoded signal via a certain process (e.g. an NTSC or PAL encoding process). Then, the encoded signal can be output as a baseband signal or modulated into an RF signal by a modulator  40  and output to the television  12 .  
         [0046]    An input/output (“I/O”) subsystem  34 , infrared (“IR”) receiver  36 , and the remote control  14  are provided to enable a user to input various commands to the set top terminal to instruct it to operate in a desired fashion. For example, if the user wishes to change the channel to which the second tuner  16  is tuned, he or she can press a certain button or buttons on the remote control  14 , and the remote control  14  outputs a distinct IR signal. The IR receiver  36  inputs the IR signal and outputs a corresponding signal to the I/O subsystem  34 . The subsystem  34  processes the signal and outputs a channel changing signal to the CPU  22 , and the CPU  22  supplies a tuning control signal to the second tuner  16  to instruct it to tune to the appropriate channel.  
         [0047]    While watching a broadcast program on a television  12 , the user can also display an electronic program guide (“EPG”) containing program listings and other information for current and future broadcast programs. To activate the EPG while watching a program, the user presses the GUIDE button on the remote control  14 . As a result, the CPU  22  searches through the RAM  28 , extracts the relevant schedule information, and outputs such information to the OSD circuit  26  so that it can be displayed on the television  12 .  
         [0048]    In the illustrative example shown in FIG. 3A, the EPG comprises a two-dimensional grid  100  which is displayed in a lower half of the television screen. In the grid, five channels (i.e. KDJT, KDUG, KJKS, KJSH, and KLSH)  102  are arranged in the vertical direction, and three times slots (i.e. 6:00 pm, 6:30 pm, and 7:00 pm)  104  are arranged in the horizontal direction. Each of the channels  102  and at least one of the time slots  104  define a cell  106  containing a program listing corresponding to a current or future program. Also, the length of each cell  106  is based on the time duration of its corresponding program. For instance, a program which is one half hour long occupies the column defined by only one time slot  104 . On the other hand, a program which is an hour long occupies two columns defined two time slots  104 . (For the sake of clarity, the titles of the programs are omitted from the cells  106  of the EPG illustrated in FIGS. 3A and 3B)  
         [0049]    The upper left portion  108  of the EPG contains information regarding the currently highlighted program. In the example shown in FIG. 3A, the upper left portion  108  indicates that the cell  106  corresponding to the RUNNING WILD program broadcast on channel KJKS is highlighted on the grid  100 . Namely, the information in the upper left portion  108  contains the title of the highlighted program (i.e. RUNNING WILD), the time period during which such program is broadcast (i.e. 6:00 to 8:00 pm), the channel on which the program is being broadcast (i.e. KJKS 5), and a brief description of the program. Additionally, the information displayed in such portion  108  of the EPG automatically changes when the user highlights a different program listing. Thus, the information always corresponds to the currently highlighted program listing.  
         [0050]    The upper right portion  110  of the EPG contains a compressed version of the television program which was currently tuned by the tuner  16  when the EPG was initially displayed on the screen. If the user highlights a program listing which corresponds to a program other than the program currently being tuned by the tuner  16 , the upper right portion  110  of the EPG still continues to display the compressed version of the currently tuned television program.  
         [0051]    When the user displays the EPG by pressing the GUIDE button, the cursor highlights the program listing which corresponds to the current time and the currently tuned channel, and such program listing is located in the middle row of channels  102  and the leftmost column of time slots  104 . For example, if the current time is 6:13, and the program RUNNING WILD broadcast on channel KJKS 5 is currently tuned by the tuner  16 , the program listing contained in the cells  106  relating to the RUNNING WILD program is highlighted. In other words, the cells  106  defined by the time slots 6:00 pm through 7:00 pm and by the channel KJKS 5 are highlighted. In the above example, the RUNNING WILD program is actually broadcast from 6:00 pm to 8:00 pm. However, since only three time slots  104  (i.e. 6:00 pm, 6:30 pm, and 7:00 pm) can be displayed on the EPG at any given time, only the cells  106  defined by the 6:00 pm, 6:30 pm, and 7:00 pm time slots  104  are highlighted.  
         [0052]    In order to highlight different program listings on the EPG, the user can press one or more of the four directional arrow buttons on the remote control  14 . For example, if the RUNNING WILD program listing is highlighted in FIG. 3A and the user presses the up arrow button, the program listing (e.g. WORLD REPORT) corresponding to the cell  106  defined by the column corresponding to the time slot 6:00 pm and the row defined by the channel KDUG is highlighted. As indicated above, when the WORLD REPORT program listing is highlighted, the upper left portion  108  of the EPG contains a brief description of the WORLD REPORT program.  
         [0053]    After highlighting a program listing on the EPG, the user can obtain additional information about the corresponding program by pressing the INFO key on the remote control  14 . When the INFO key is pressed, the CPU  22  searches though the information stored in the RAM  28  to obtain additional program information corresponding to the highlighted program listing. Alternatively or additionally, the CPU  22  could download the additional program information from the head end  2 . A program description window  112 , which is the same size as the bottom portion of the EPG screen containing the program grid  100 , is generated by the CPU  22  and the OSD circuit  26  and is located “behind” the program grid  100 . Then, the CPU  22  and OSD circuit  26  cause the program grid  100  to “slide” off one side of the screen so that the program description window  112  is exposed, and the user is able to view the additional program information.  
         [0054]    [0054]FIGS. 3A to  3 D show an illustrative example of how the program grid  100  of the EPG slides off the screen to expose the program description window  112 . FIG. 3A shows the situation when the RUNNING WILD program listing is highlighted on the EPG immediately before the user presses the INFO key on the remote control  14 . Once the INFO key is pressed, the program grid  100  begins to slide off the right side of the screen to expose the leftmost portion of the program description window  112 . (FIG. 3B). The program grid  100  continues to slid off the screen (FIG. 3C) until the program description window  112  is completely exposed (FIG. 3D), and the user can easily view the additional program information. As shown in FIG. 3D, the additional program information contains a description of the plot of the program, the actors and actresses starring in the program, the director of the program, the production date of the program, the duration of the program, and the rating of the program.  
         [0055]    As one skilled in the art will readily realize upon reading the present application, the display and relative movement between the grid  100  and window  112  in the above example (and among the EPG, grid  100 , window  112 , and/or broadcast program  200  in the following examples) can be accomplished by using many types of devices and/or software programs. Therefore, not only can the specific means disclosed in FIG. 2 carry out the above operation, but any other means can be used to perform the function.  
         [0056]    Also, the manner in which the program grid  100  slides off the screen is not limited to the example above. For instance, the grid  100  can slide off the left, bottom, or top of the screen. Also, the grid  100  does not have to completely slide off the screen to expose the program description window  112  and may only need to slide partially off the screen. Additionally, the grid  100  may not slide off the screen but may “roll up” to expose the program description window  112  located underneath the grid  100 . Also, the additional program information is not limited to the above information and could comprise virtually any type of information.  
         [0057]    In addition to being located underneath the program grid  100  of the EPG, the program description window  112  can be located underneath an actual broadcast program  200  that the user is watching. FIGS. 4A to  4 D show a illustrative example in which a program description window  112  is located underneath of the RUNNING WILD broadcast program  200 , and the program  200  “rolls up” to expose the window  112 . FIG. 4A shows the situation when the RUNNING WILD program  200  is tuned by the tuner  16  immediately before the user presses the INFO key on the remote control  14 . After pressing the INFO key, the program  200  begins to “roll up” the screen to expose the bottom portion of the program description window  112 . (FIG. 4B). The RUNNING WILD program  200  continues to “roll up” the screen (FIG. 4C) until the program description window  112  is completely exposed (FIG. 4D). Obviously, the broadcast program  200  can “roll up” in any direction to expose the program description window  112 . Also, the broadcast program  200  can completely roll up to expose the window  112  or can slide off the window  112  in any direction as described above.  
         [0058]    In addition to exposing the program description window  112  via the above methods, FIGS. 5A to  5 D show an example in which the window  112  “pushes” the broadcast program  200  off the screen. In FIG. 5A, a broadcast program  200  is displayed before the user presses the INFO key. Once the INFO key is pressed, the program description window  112  begins to push the broadcast program  200  off the right side of the screen, and the rightmost portion of the window  112  is exposed. (FIG. 5B). The program description window  112  continues to push the program  200  off the screen (FIG. 5C) until the program description window  112  moves completely onto the screen (FIG. 5D). Clearly, the program description window  112  can push the broadcast program  200  off the screen in any direction and does not necessarily have to push the broadcast program  200  completely off the screen. Also, the window  112  may be displayed by pushing the program grid  100  of the EPG or the entire EPG off the screen.  
         [0059]    Another manner in which the program description window  112  can be displayed is shown in FIGS. 6A to  6 B. FIG. 6A shows a broadcast program  200  (or the EPG) before the INFO key is pressed on the remote control  14 . As shown in FIGS. 6B to  6 D, the broadcast program  200  (or the EPG) begins to disintegrate to expose the program description window  112 . After a certain period of time, the entire program description window  112  is exposed. (FIG. 6E). Instead of causing the entire program  200  (or the EPG) to disintegrate, only a portion of the program  200  (or the EPG) may disintegrate to expose the window  112 .  
         [0060]    Once the program description window  112  is exposed, the user can display the whatever previous information was displayed on the television  12  before the window  112  was displayed by pressing any key on the remote control  14 . After pressing any key, the previous information is restored in a manner that is opposite to the manner in which is the program description window  112  was displayed. For example, in the embodiment shown in FIGS. 3A to  3 D, the program grid  100  of the EPG would slide to the left over the window  112 . In the embodiment shown in FIGS. 6A to  6 E, the broadcast program  200  (or the EPG) would reappear over the program description window  112  in a piecewise fashion. Alternatively, the previous information may immediately reappear in full over the program description window  112  when any key is pressed on the remote control  14 . Also, the previous information may be restored by pressing a particular key (or sequence of keys) on the remote control  14  instead of any key.  
         [0061]    The previous description of the preferred embodiments is provided to enable a person skilled in the art to make or use the present invention. Moreover, various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not intended to be limited to the embodiments described herein but is to be accorded the widest scope as defined by the claims.