JP6108699B2 - Broadcast receiving apparatus, broadcast receiving method and program - Google Patents

Description

  The present invention relates to a broadcast receiving apparatus, a broadcast receiving method, and a program.

  In television broadcasting, related program information is provided for each broadcasted program. As an example, the prior program information can be obtained regardless of the program change by collating the program titles of the prior program information provided before the broadcast and the broadcast program information provided immediately before or after the broadcast. The structure which can utilize the content of is known (for example, refer patent document 1).

JP 2007-251743 A

For example, an information program or the like that is broadcast live such as news, etc., when a new incident or event occurs during the broadcast, the organization in the program is changed and information related thereto is appropriately provided. Is possible. That is, such a program has real-time characteristics.
However, if you are watching a program that does not have real-time properties, such as a drama, even if an event occurs at that time, you can get a quick report about the event in the middle of the program. There is nothing.

Although it is not so public or urgent, there is information that is useful to the user if it is known as breaking news. Therefore, it is preferable that convenience information, entertainment, and the like be improved by providing such information with prompt information to a user who is watching a program that does not have real-time performance.
When trying to acquire information as a bulletin as described above, one is to analyze the audio and subtitles of the channel that the user is not viewing and determine whether the content is information worthy of the bulletin Can be considered. However, at present, it is difficult to determine whether or not the information has promptness from the analysis of voice and subtitles, and the processing load is very large.
For example, Patent Document 1 is a technique corresponding to a change in program information, but specifies a correspondence relationship between programs in advance program information and subsequent program information. It is not possible.

  The present invention has been made in view of such circumstances, and an object of the present invention is to enable accurate notification of information having promptness from broadcast-related information.

  In order to solve the above-described problems, the broadcast receiving apparatus of the present invention acquires a broadcast-related information acquisition unit that acquires broadcast-related information including information related to a broadcast program, and the broadcast-related information acquired this time is acquired last time. Difference information generation that extracts the difference content for the previously acquired broadcast related information from the broadcast related information acquired this time and generates the difference information including the extracted difference content when the broadcast related information has changed And a display control unit for displaying the difference information.

  Moreover, in the broadcast receiving apparatus of the present invention, the difference information generation unit generates the difference information further including a channel for broadcasting the program having the difference content, and the display control unit includes the difference content included in the difference information. And display the channel.

  In the broadcast receiving device of the present invention, the difference information generation unit generates the difference information further including a broadcast time of a program that broadcasts the difference content, and the display control unit includes the difference content included in the difference information. And show the broadcast time.

  Moreover, in the broadcast receiving apparatus of the present invention, the difference information generation unit does not generate difference information of programs corresponding to attributes specified in advance.

  In the broadcast receiving apparatus of the present invention, the display control unit displays the difference information at a timing based on a broadcast time of a program corresponding to the difference content indicated by the broadcast-related information.

  In addition, the broadcast receiving apparatus of the present invention controls viewing control so that a program that broadcasts the content of the displayed difference information can be viewed in response to an operation of designating the displayed difference information. The unit is further provided.

  Further, in the broadcast receiving apparatus of the present invention, the viewing control unit controls so that an image of the program is displayed when a program that broadcasts the content of the difference information being displayed is currently being broadcast. .

  In the broadcast receiving apparatus of the present invention, the viewing control unit may make a recording reservation for the program when a program that broadcasts the content of the displayed difference information is broadcast in the future. To control.

  The broadcast receiving method as one aspect of the present invention includes a broadcast-related information acquisition step of acquiring broadcast-related information including information related to a broadcast program, and a broadcast in which the broadcast-related information acquired this time is acquired last time. A difference information generation step of extracting difference contents with respect to the broadcast-related information acquired last time from the broadcast-related information acquired this time, and generating difference information including the extracted difference contents when there is a change with respect to the related information; And a display control step for displaying the difference information.

  In addition, in the program as one aspect of the present invention, a broadcast-related information acquisition step for acquiring broadcast-related information including information related to a broadcasted program is acquired in the computer, and the broadcast-related information acquired this time is acquired last time. A difference information generation step of extracting the difference contents for the broadcast-related information acquired last time from the broadcast-related information acquired this time and generating difference information including the extracted difference contents when the broadcast-related information is changed And a display control step for displaying the difference information.

  As described above, according to the present invention, it is possible to obtain an effect that information having promptness can be accurately notified from broadcast-related information.

It is a figure which shows the structural example of the broadcast receiver in this embodiment. It is a figure which shows the structural example of the control part in the broadcast receiving apparatus of this embodiment. It is a figure which shows the structural example of the difference information table in this embodiment. It is a figure which shows the example of a display mode of difference information in this embodiment. It is a figure which shows the example of a display mode of difference information in this embodiment. It is a figure which shows the example of a process sequence which the broadcast receiver in this embodiment performs. It is a figure which shows the example of a process sequence for the difference information generation which the difference information generation part in the broadcast receiver of this embodiment performs. It is a figure which shows the example of a process sequence for the difference information display which the display control part in the broadcast receiver of this embodiment performs. It is a figure which shows the example of a process sequence according to the difference information confirmation operation which the control part in this embodiment performs. It is a figure which shows the structural example of the control part as a modification of this embodiment. It is a figure which shows the example of a process sequence which the control part in the modification of this embodiment performs.

FIG. 1 shows a configuration example of a broadcast receiving apparatus according to the present embodiment. The broadcast receiving apparatus shown in this figure can receive, for example, a terrestrial digital television broadcast and display an image.
The broadcast receiving apparatus shown in this figure includes tuner units 101-1, 101-2, demodulation units 102-1, 102-2, demultiplexer 103, video decoder 104, video processing unit 105, display unit 106, audio decoder 107, An audio processing unit 108, an amplifier 109, a speaker 110, a control unit 111, a program storage unit 112, and an operation unit 113 are provided.

The tuner units 101-1 and 101-2 each input a terrestrial digital television broadcast signal to select a channel. Hereinafter, the tuner units 101-1 and 101-2 will be referred to as the tuner unit 101 when it is not necessary to distinguish between them.
In the present embodiment, by providing the two tuner units 101 as described above, while the user's viewing program is selected by one tuner unit 101, the other tuner unit 101 is in the background. Difference information can be generated by extracting an EIT for each channel (referred to as a number assigned to a frequency band assigned for each television broadcast) other than the viewing program.

  The demodulation units 102-1 and 102-2 demodulate the signals selected by the tuner units 101-1 and 101-2, respectively, and for example, transport streams including broadcast signals corresponding to the selected channels. Output. Note that, hereinafter, the demodulator 102-1 and the demodulator 102-2 are referred to as a demodulator 102 unless otherwise distinguished.

  The demultiplexer 103 receives the transport stream and separates video data, audio data, and various control data. The demultiplexer 103 outputs the separated video data to the video decoder 104, and outputs the separated audio data to the audio decoder 107. Further, the demultiplexer 103 outputs various separated control data to the control unit 111.

The video decoder 104 inputs video data and executes a decoding process (decoding) to output a digital video signal in a predetermined format to the video processing unit 105. The video processing unit 105 inputs a digital video signal, performs predetermined signal processing for image display, and supplies the signal to the display unit 106.
The display unit 106 displays the video signal supplied from the video processing unit 105 as an image.

  The audio decoder 107 inputs audio data and executes a decoding process (decoding) to output a digital audio signal in a predetermined format to the audio processing unit 108. The audio processing unit 108 receives a digital audio signal, performs predetermined signal processing, and outputs the signal to the amplifier 109. The amplifier 109 amplifies the input audio signal and outputs it from the speaker 110 as sound.

  The control unit 111 realizes functions and operations as a broadcast receiving device by controlling each unit shown in FIG. The control unit 111 can be configured to include, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like.

  In addition, the control unit 111 according to the present embodiment extracts an EIT (Event Information Table) difference, which is one piece of control information output from the demultiplexer 103. And the control part 111 performs control for superimposing and displaying the extracted difference information on the image of the program currently displayed as notification information.

  The program storage unit 112 stores video and audio of broadcast programs. As hardware corresponding to the program storage unit 112, for example, an HDD (Hard Disc Drive), a flash memory, or the like can be employed.

  The operation unit 113 collectively indicates operators provided in the broadcast receiving apparatus according to the present embodiment. Moreover, when the broadcast receiving apparatus of this embodiment is provided with a remote controller, the operation part 113 contains this remote controller and the receiving part corresponding to this.

FIG. 2 shows a functional configuration example of the control unit 111 corresponding to the display of difference information in the present embodiment.
The control unit 111 shown in this figure includes a channel selection control unit 121, a broadcast related information acquisition unit 122, a broadcast related information storage unit 123, a TOT acquisition unit 124, a broadcast related information change determination unit 125, a difference information generation unit 126, and difference information. A storage unit 127, a display control unit 128, a viewing control unit 129, and a recording reservation unit 130 are provided.

  The channel selection control unit 121 instructs a channel to be selected by the tuner units 101-1 and 101-2 shown in FIG.

The control information transmitted by the transport stream includes an EIT (Event Information Table). The EIT is one piece of broadcast related information including information related to a program including a program name, broadcast date and time, broadcast content, and the like. An EPG (Electrical Program Guide) is created mainly using EIT.
The broadcast related information acquisition unit 122 acquires EIT (broadcast related information). Specifically, the broadcast related information acquisition unit 122 acquires the EIT separated from the transport stream by the demultiplexer 103.
The broadcast related information storage unit 123 stores the EIT acquired by the broadcast related information acquisition unit 122 together with the TOT information acquired by the TOT acquisition unit.

The control information transmitted by the transport stream includes a TOT (Time Offset Table). The TOT includes information on the current date, time, daylight saving time, and the like. That is, TOT is current date information indicating the current date.
The TOT acquisition unit 124 acquires the TOT separated from the transport stream by the demultiplexer 103.

The broadcast related information change determination unit 125 determines whether or not the EIT acquired this time by the broadcast related information acquisition unit 122 has changed with respect to the EIT acquired last time and stored in the broadcast related information storage unit 123. To do.
The version number of the EIT is changed as its contents are changed. Further, the EIT is changed according to the change of the date indicated by the TOT even if the content is not changed. Therefore, the broadcast-related information change determination unit 125 indicates that the version of the EIT acquired this time is different from the version of the EIT acquired last time, and the TOT corresponding to each of the EIT acquired this time and the EIT acquired last time is indicated. If the dates are the same (no change), it is determined that the EIT has changed.

The difference information generation unit 126 generates difference information in response to the broadcast-related information change determination unit 125 determining that the EIT has changed. The difference information is information including difference contents of the EIT acquired this time with respect to the EIT acquired last time. More specifically, the difference information is formed by associating the content of the difference with the channel of broadcasting the program having the difference content and the information of the broadcast time.
The EIT includes program content information such as a program title, performers and program descriptions, and information on a channel and a broadcast time zone as information on one program. In the difference information, the difference content is a difference between the EIT acquired this time and the program content information of the EIT acquired last time. The channel and broadcast time zone information in the difference information reflects the channel and broadcast time zone indicated in the EIT corresponding to the program for which the difference information has been acquired.

The difference information storage unit 127 stores the difference information generated by the difference information generation unit 126.
FIG. 3 shows an example of the structure of the difference information table 300 stored in the difference information storage unit 127. One line (one record) shown in this figure is one piece of difference information.
As can be seen from this figure, the difference information table 300 has a structure in which one or more pieces of difference information including a channel, a broadcast time, and difference contents are stored.

In the difference information table 300 shown in this figure, the difference content in the difference information from the first line to the third line has the same keyword “Mr. However, the channels corresponding to these difference information are different from “082”, “011”, and “032”, respectively. In addition, the broadcasting hours are the same.
The difference information in these first to third lines is within the EIT that is scheduled to broadcast the contents related to the marriage of ○ △ □ in three programs with different channels but the same broadcast time zone. It shows that it is extracted from program information.

  Further, the difference content on the fourth line in the difference information table 300 is “Special Program ABC Case Relay”. This is because the program content of the inserted special program is reflected in the difference content in response to the change that the special program is inserted in the program organization in the broadcast of the corresponding channel. The broadcast time of the difference information indicates a time zone during which this special program is broadcast.

  Further, the difference content on the fifth line in the difference information table 300 is “movie planet wars”. This is because the EIT changed because the movie title was decided from the state where the movie title was undecided, although the time zone indicated as the broadcast date and time was secured as the frame for broadcasting the movie in the corresponding channel. Reflects.

Returning to FIG.
The display control unit 128 causes the display unit 106 to display the difference information. For this purpose, the display control unit 128 reads difference information necessary for display from the difference information table 300 stored in the difference information storage unit 127. Then, the read difference information data is output to the video processing unit 105. At this time, the video processing unit 105 displays the video signal of the program input from the video decoder 104 on the display unit 106. However, when data of the difference information is input, an image indicating the content of the difference information is generated, It is displayed together with the image of the program that has been displayed so far.

In response to an operation for designating the difference information being displayed on the display unit 106 being performed on the operation unit 113, the viewing control unit 129 allows the user to download a program that broadcasts the content of the difference information being displayed. Control so that it can be viewed. For example, when a program that broadcasts the content of the difference information being displayed is currently being broadcast, the viewing control unit 129 controls to display an image of the program. At this time, the viewing control unit 129 instructs the channel selection control unit 121 so that the tuner unit 101 switches to a state in which a channel for broadcasting a program having the content of the difference information is selected.
In addition, when the program that broadcasts the content of the difference information being displayed is to be broadcast in the future, the viewing control unit 129 performs control so that the recording of the program is reserved. At this time, the viewing control unit 129 controls the recording reservation unit 130.

  The recording reservation unit 130 sets reserved recording of a program. In this reservation recording setting, the recording reservation unit 130 can use the EIT stored in the broadcast related information storage unit 123.

  Next, with reference to FIG. 4 and FIG. 5, an example of a display mode of difference information on the display unit 106 is shown. In these drawings, a case where the difference information on the first line in the difference information table 300 of FIG. 3 is displayed is taken as an example.

FIG. 4A shows an example in which characters indicating the difference content 201 are displayed so as to be superimposed on the program image displayed on the display unit 106. In this case, the text as the difference content 201 is displayed in a telop format.
By displaying the difference content 201 in this manner, the user can know that the entertainer △△ □ has announced the marriage even when watching a non-real time program such as a drama.

  FIG. 4B is an example in which the broadcast time 202 and the channel 203 are displayed together with the difference content 201 on the program image displayed on the display unit 106. Thus, by displaying both the broadcast time 202 and the channel 203, the user can know the channel and broadcast time zone of the program to be broadcast about the marriage of Mr. A.

  FIG. 4 (c) shows the difference content 201, the broadcast time 202, and the channel 203 for the area where the program image is reduced to some extent on the display unit 106 and displayed, and thus the program image is not displayed. Is an example of displaying. By displaying in this way, the display of the difference information does not overlap with the program image, making it easier to see.

  In FIG. 5A, the portal site for the Internet service for the television receiver is displayed on the screen of the display unit 106. The difference content 201 is displayed as difference information at a predetermined position in the portal site.

  FIG. 5B shows an example in which the difference contents 201 as the difference information, the broadcast time 202, and the channel 203 are displayed together with the electronic program guide.

  By displaying the difference information as shown in FIG. 4 and FIG. 5 described above, for example, information that is not urgent or highly public but that is useful to some extent can be known relatively quickly.

For example, as the timing for displaying the difference information, for example, the difference information generated by the difference information generation unit 126 according to the timing when the broadcast-related information change determination unit 125 determines that the EIT has changed is used. The display unit 106 may be displayed immediately.
Further, the difference information may be displayed at the timing when the broadcast start time indicated by the broadcast time of the difference information (or a little before that) may be reached.
Furthermore, the difference information stored in the difference information storage unit 127 may be displayed in response to an operation instructing the user to display the difference information.

  In addition, in the present embodiment, for example, when the difference information is displayed as shown in FIGS. 4 and 5, when the user wants to confirm the details of the difference information in more detail, the user displays the difference being displayed. An operation for specifying information (difference information specifying operation) is performed. As an example, the difference information specifying operation is to operate a determination key provided in the remote controller while the difference information is being displayed.

  In response to the difference information designation operation being performed, the viewing control unit 129 in the broadcast receiving apparatus of the present embodiment switches the channel to the program that broadcasts the content of the displayed difference information or records as described above. Make reservation settings.

  In other words, if the program corresponding to the difference information being displayed when the difference information designation operation is performed is currently being broadcast, switching to the channel that broadcasts this program is performed. Thereby, the user can know the detailed content relevant to the displayed difference information immediately by watching the program.

  In addition, when a program corresponding to the difference information displayed when the difference information designation operation is performed is to be broadcast in the future, the viewing control unit 129 sets a recording reservation for this program. Thus, the user can surely view the program that broadcasts the content of the displayed difference information later.

  The flowchart in FIG. 6 illustrates an example of a processing procedure for the control unit 111 illustrated in FIG. 2 to generate difference information and store the difference information in the difference information storage unit 127.

  First, the channel selection control unit 121 controls one of the two tuner units 101 that is not used for viewing a program to select one station (step S101). That is, in this case, the two tuner units 101 that are not used for viewing a program are used to circulate and acquire the EIT corresponding to each channel.

  Next, the broadcast related information acquisition unit 122 acquires the EIT of the channel selected in step S101 (step S102). Further, the TOT acquisition unit 124 acquires the TOT transmitted together with this EIT (step S103).

  The broadcast-related information change determination unit 125 compares the EIT acquired in step S102 with the version of the EIT stored in the broadcast-related information storage unit 123 as previously acquired, and determines whether or not they are the same. (Step S104-YES).

  If they are the same version (step S104-YES), there is no change in the content of the EIT between the previous time and this time. Therefore, in this case, the channel selection control unit 121 skips steps S105 to S108 and changes a channel to be selected (hereinafter also referred to as a channel selection channel) (step S109). Then, returning to step S101, the tuner unit 101 selects the channel selected in step S109. As a result, the EIT corresponding to the next selected channel is acquired.

  On the other hand, when the versions are different (step S104-NO), the broadcast-related information change determination unit 125 further determines that the date indicated by the TOT acquired in step S103 is the TOT acquired last time and stored together with the EIT. It is determined whether or not the date is the same as the date indicated by (step S105).

  When the TOT dates are different (NO in step S105), the EIT version is changed in accordance with the TOT date change, and the content of the EIT itself is not changed. Also in this case, the channel selection control unit 121 skips steps S106 to S108, changes the channel selection channel (step S109), and returns to step S101.

  On the other hand, if the TOT dates are the same (step S105—YES), the contents of the EIT have been changed. Therefore, in this case, the difference information generation unit 126 generates difference information (step S106), and stores the generated difference information in the difference information table 300 of the difference information storage unit 127 (step S107).

  Further, the broadcast related information storage unit 123 stores the EIT acquired in the current step S102 (step S108). At this time, the broadcast-related information storage unit 123 may overwrite the previous EIT with the EIT acquired in step S102 of this time, or acquired in step S102 of the current time while leaving the previous EIT. The EIT may be newly stored. Thereafter, the channel selection control unit 121 changes the channel selection channel (step S109) and returns to step S101.

The flowchart of FIG. 7 shows an example of a processing procedure for generating difference information as step S106.
The difference information generation unit 126 compares the EIT acquired in step S102 of FIG. 6 with the EIT acquired last time and stored in the broadcast related information storage unit 123, and specifies the difference content (step S201).

Next, the difference information generation unit 126 extracts information indicating the genre (attribute) to which the program corresponds from the program information including the difference contents in the EIT (step S202).
Then, the difference information generation unit 126 determines whether or not the extracted genre is a genre to be excluded from the difference information generation target (step S203).

In this embodiment, the difference information displayed as the bulletin is based on the difference in the program information as the EIT. Therefore, if there is no particular limitation, in this embodiment, it is possible to extract and display difference information for all programs scheduled to be broadcast.
However, not all the difference information displayed in this way is useful for the user. In general, the difference in a genre program such as news or an information program is useful as a bulletin, but the difference in a genre program such as a drama or educational program is not particularly useful even if displayed as a bulletin There are many.
Therefore, in the present embodiment, among the genres defined in the EIT, a genre of a program that does not generate difference information is determined in advance. In step S203, it is determined whether or not the genre of the program in which the difference has occurred is a genre that should be excluded from the difference information generation target.
The genre of the program to be excluded from the difference information generation target may be fixed in advance, or may be set by the user so that the user's preference is reflected, for example. Good. In addition, the genre (attribute) here is based on the content of a program such as “drama”, “news”, “sports”, or in a broadcast form such as “live broadcast” or “recorded program”. Related items are also included.

  When the genre is to be excluded from the generation target of the difference information (step S203—YES), it is not necessary to generate the difference information. Therefore, in this case, the difference information generation unit 126 ends the process shown in this figure. That is, the difference information generation unit 126 does not generate difference information of programs corresponding to a genre (attribute) designated in advance.

  On the other hand, if it is not a genre that should be excluded from the generation target of difference information (step S203-NO), the difference information generation unit 126 extracts the difference content specified in the previous step S201 (step S204). Then, the difference information is generated so as to add the channel and broadcast time information indicated by the program information from which the difference content is extracted to the extracted difference content (step S205).

  The flowchart in FIG. 8 illustrates an example of a processing procedure for the display control unit 128 to display the difference information. Note that the process shown in this figure is an example in which the display of difference information is started at a timing corresponding to the broadcast start time indicated by the broadcast time in the difference information.

  First, the display control unit 128 refers to the difference information in the difference information table 300 stored in the difference information storage unit 127 (step S301). Then, it is determined whether or not there are a plurality of pieces of difference information whose broadcast time is included in the next display start time (step S302).

  When there are multiple pieces of difference information including the broadcast time at the next display start time (step S302—YES), the display control unit 128 further includes the difference content of the same keyword in the plurality of difference information. It is determined whether or not there is a plurality (step S303).

  Here, if there are a plurality of pieces of difference information including the difference contents of the same keyword (step S303-YES), the keyword having the highest number of appearances is determined from the difference contents included in the plurality of difference information (step S304). ). As the number of appearances increases, there are many programs whose broadcast contents are changed in relation to the contents, and the general attention is high. Therefore, it can be said that the value notified to the user is high.

  In addition, when there is no difference content of the same keyword in a plurality of difference information and each is different (step S303-NO), the display control unit 128 determines the priority of the keyword in each difference content (step S305). For this determination, for example, information such as the ranking of search words on the Internet may be acquired, and these may be collated with keywords for each difference content in the plurality of pieces of difference information. As a result, a high priority is set for a keyword that currently has a high degree of attention at present.

And the display control part 128 determines the difference information of a display object as follows according to the process result from step S301 to S305 (step S306).
That is, if it is determined in step S302 that there is only one difference information whose broadcast time is included in the next display start time (step S302—NO), That one difference information is determined as a display target.
When the keyword having the highest number of appearances is determined in step S304, the display control unit 128 displays one difference information selected according to a predetermined rule from the difference information including the determined keyword. Determine as. In this case, for example, the display control unit 128 may determine not only the one with the highest number of appearances but also the difference information including the keywords with the number of appearances up to a predetermined higher order as display targets one by one.
When keyword priority determination is performed in step S305, the display control unit 128 displays one difference information selected according to a predetermined rule from the difference information including the keyword with the highest priority. Determine as. Also in this case, the display control unit 128 may determine the difference information including the keywords with the priority up to a predetermined higher level as the display target one by one.

Next, the display control unit 128 determines whether or not the display start time has been reached (step S307). In this case, the display start time corresponds to the broadcast start time indicated by the broadcast time included in the difference information determined as the display target in step S306. If the display start time has not been reached (step S307—NO), the display control unit 128 returns to step S301.
When the display start time is reached (step S307—YES), the display control unit 128 performs control for displaying the difference information determined as the display target in step S306 (step S308).

  FIG. 9 shows an example of a processing procedure executed by the viewing control unit 129 in response to an operation (difference information specifying operation: for example, a determination key operation) for specifying the difference information being displayed on the screen of the display unit 106.

The viewing control unit 129 waits for a user to perform a difference information specifying operation while the difference information is displayed on the screen of the display unit 106 (step S401—NO).
When the difference information confirmation operation is performed (step S401—YES), the viewing control unit 129 determines the broadcast time zone of the program corresponding to the difference information being displayed at that time (step S402). For this purpose, the viewing control unit 129 may refer to the broadcast time included in the displayed difference information in the difference information table 300 stored in the difference information storage unit 127, for example.

  Next, the viewing control unit 129 determines whether or not there is another difference information having the same keyword as the difference information being displayed in the difference information table 300 and having the same broadcast time period (step S403). ).

If there is no difference information of the same keyword and broadcast time zone as the difference information being displayed (NO in step S403), there is no other program that broadcasts the same content as the difference information being displayed. Therefore, in this case, the program corresponding to the displayed difference information is selected (determined) as a viewing target (step S404).
On the other hand, when the same keyword as the difference information being displayed and the difference information of the broadcast time zone exist (step S403-YES), a program having the same content as the difference information being displayed is broadcast on a plurality of channels. Therefore, in this case, the viewing control unit 129 selects one program as a viewing target from among the plurality of programs according to a predetermined rule (step S405). In this selection, the viewing control unit 129 may display information on programs of these channels on the display unit 106 and select them according to a user operation.

  Next, the viewing control unit 129 determines whether or not the program corresponding to the displayed difference information is being broadcast (step S406). If the broadcast time zone determined in step S402 includes the current time, the broadcast is in progress.

  If the program is being broadcast (YES in step S406), the viewing control unit 129 instructs the channel selection control unit 121 to switch to the channel that broadcasts the program to be viewed selected in step S404 or S405 (step S407). ). In response to this instruction, the channel selection control unit 121 switches the tuner unit 101 that has selected the program that has been displayed on the display unit 106 so far to a channel that broadcasts the program to be viewed. Thereby, the screen of the display unit 106 is switched from the image of the program so far to the image of the target program that broadcasts the content of the difference information.

  On the other hand, when the program is not being broadcast (step S405-YES), the viewing control unit 129 controls the recording reservation unit 130 so that the recording reservation is set for the program to be viewed selected in step S404 or S405 (step S405). S408).

For example, when a program displayed on the screen of the display unit 106 is recorded in the program storage unit 112, even if difference information is displayed on the screen, recording is performed so that an image of the difference information is not included. Should be done. This is because the difference information functions as a bulletin, and the user is likely to feel troublesome when viewing the program image later.
Note that, for example, a program image in a state in which the display of the difference information is reflected may be recorded by a user setting.

Next, a modification of this embodiment will be described.
In digital television broadcasting, it has been proposed to encode and transmit emergency earthquake warnings and the like using an AC (Auxiliary Channel) carrier in a central segment of 13 segments in a frequency band of one channel.
The broadcast receiving apparatus of the modification of this embodiment processes the signal of the AC carrier which transmits an emergency earthquake early warning in this way as broadcast related information.

  FIG. 10 shows a configuration example of the control unit 111 corresponding to a modification of the present embodiment. The control unit 111 shown in this figure includes a broadcast-related information acquisition unit 141, a broadcast-related information change determination unit 142, an emergency information extraction unit 143, an emergency information storage unit 144, a timing unit 145, a display control unit 146, and a power supply state determination unit 147. Is provided.

  The broadcast related information acquisition unit 141 acquires, for example, an AC carrier signal (AC signal) output from the demodulation unit 102 as broadcast related information.

  The broadcast related information change determination unit 142 determines a change in the flag corresponding to the emergency information inserted at a predetermined position of the AC signal that is the broadcast related information.

  The emergency information extraction unit 143 receives the broadcast-related information acquisition unit 141 in response to the broadcast-related information change determination unit 142 determining that the flag of the AC signal has changed to a state indicating that emergency information is being transmitted. Extracts emergency information from the acquired AC signal. That is, in the modification, emergency information is extracted as a difference between AC signals that are broadcast-related information.

The emergency information storage unit 144 stores the emergency information extracted by the emergency information extraction unit 143 in association with the current time measured by the time measuring unit.
The timer unit 145 measures the current time.

The display control unit 146 causes the display unit 106 to display the emergency information extracted by the emergency information extraction unit 143 or the emergency information stored in the emergency information storage unit 144.
The power state determination unit 147 determines whether the power of the broadcast receiving apparatus is on or off.

The flowchart of FIG. 11 shows an example of a processing procedure executed by the control unit 111 of FIG.
The broadcast related information acquisition unit 141 acquires an AC signal (step S501). Next, the broadcast-related information change determination unit 142 determines whether or not there has been a change in the emergency information response flag in the acquired AC signal (step S502). Here, a change from a state indicating that emergency information is not transmitted to a state indicating that it is transmitted is determined.

If there is no change in the flag corresponding to the emergency information (step S502-NO), the process returns to step S501.
On the other hand, when it is determined that there is a change in the flag corresponding to the emergency information (NO in step S402), the emergency information is transmitted by the AC carrier. This corresponds to determining that an emergency bulletin has been received. Therefore, in this case, the emergency information extraction unit 143 extracts emergency information from the AC signal (step S503).

Next, the power state determination unit 147 determines whether or not the power of the broadcast receiving apparatus is on (step S504).
When the power is on (step S504—YES), the display control unit 146 displays the emergency information extracted in step S503 on the display unit 106 (step S505). In this way, if the broadcast receiver is powered on when emergency information is received from the AC carrier, the emergency information is displayed immediately.

As the emergency information is displayed, the emergency information storage unit 144 acquires the current time from the time measuring unit (step S506). Next, the emergency information storage unit 144 stores the emergency information acquired in step S503 with the current time acquired in step S506 and a flag indicating that it has been displayed (step S507).
The emergency information stored in this way can be displayed as a history, for example, according to a user operation. By looking at this, it is possible to immediately grasp, for example, how large an earthquake occurred and how often.

  On the other hand, when the power is off, the emergency information storage unit 144 acquires the current time from the time measuring unit (step S508). In addition, the emergency information storage unit 144 adds the current time acquired in step S508 and a flag indicating that the emergency information is not displayed (information indicating that it is not displayed) to the emergency information acquired in step S503. (Step S509).

  Although not illustrated, the display control unit 146 refers to the flag added to the emergency information stored in the emergency information storage unit 144 when the power state of the broadcast receiving apparatus is switched from off to on, for example. To do. Then, the display control unit 146 causes the display unit 106 to display emergency information to which a flag indicating non-display is added.

  As described above, in the modified example, the emergency information is transmitted to the determination unit (broadcast related information change determination unit 142) that determines whether or not the emergency information is transmitted based on the change of the broadcast related information (AC signal). The emergency information extraction unit 143 that extracts emergency information from broadcast-related information in response to the determination that the information is determined, the power state determination unit 147 that determines the power state, and the power state when the emergency information is extracted is off The emergency information storage unit that stores the extracted emergency information and the power state when the emergency information is extracted are determined to be on. A display control unit that displays the extracted emergency information and that displays the emergency information stored in the emergency information storage unit in response to the power state changing from off to on.

  With such a configuration, in the modification, emergency information received when the power state of the broadcast receiving apparatus is off is stored, and is automatically displayed when the power is turned on. Thereby, even if the user has not watched the television broadcast on the broadcast receiving device at the time of the earthquake occurrence, the user can confirm the content of the emergency information thereafter.

  In addition, when displaying emergency information in response to the power supply switching from the off state to the on state as described above, the displayed emergency information is in the past and does not correspond to the current time. Is preferably displayed in such a manner as to be understood by the user. As an example, an explanatory text is displayed together with emergency information, such as “This is information received at ** month * date xx hour xx minutes". Further, for example, emergency information to be displayed in real time may be displayed in red or the like, and emergency information to be displayed after the power is turned on may be displayed in different colors such as red.

  In addition, for example, emergency information in an AC signal may be transmitted in common content between channels with emphasis on publicity, but may have different content transmitted for each channel. When transmitting emergency information having different contents for each channel, the emergency information extraction unit 143 causes the broadcast-related information acquisition unit 141 to perform scanning for each channel, and acquires an AC signal for each channel. Every emergency information is extracted. The emergency information storage unit 144 also stores emergency information separately for each channel. Then, each time the channel is switched, the display control unit 146 displays the emergency information when the emergency information stored in the emergency information storage unit 144 corresponding to the switched channel is not displayed. Is displayed. As a result, the past emergency information is also switched to the content transmitted by the channel as the channel is switched.

In the description so far, the broadcast related information corresponding to the television broadcast has been described as an example. However, for example, difference information is generated from the broadcast related information related to the radio broadcast, and the difference information is displayed by display or the like. You may announce. As an example, radio broadcast program guide information may be acquired as broadcast-related information, and difference information of this program guide information may be notified by display or the like.
Also, the broadcast related information is not limited to the EIT and AC signals mentioned so far. In addition, broadcast-related information such as EIT and AC signals in the above description has been transmitted by being included in the broadcast signal. For example, the broadcast-related information acquisition unit 122 according to the present embodiment is a network or the like Broadcast related information may be acquired through a route other than the broadcast signal.

  Further, a program for realizing the function of each unit in FIG. 2 or the like is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to generate difference information. And may make announcements. Here, the “computer system” includes an OS and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

101 (101-1, 101-2) Tuner 102 (102-1, 102-2) Demodulator 103 Demultiplexer 104 Video decoder 105 Video processor 106 Display unit 107 Audio decoder 108 Audio processor 109 Amplifier 110 Speaker 111 Control Unit 112 program storage unit 113 operation unit 121 channel selection control unit 122 broadcast related information acquisition unit 123 broadcast related information storage unit 124 TOT acquisition unit 125 broadcast related information change determination unit 126 difference information generation unit 127 difference information storage unit 128 display control unit 129 Viewing control unit 130 Recording reservation unit 141 Broadcast related information acquisition unit 142 Broadcast related information change determination unit 143 Emergency information extraction unit 144 Emergency information storage unit 145 Timekeeping unit 146 Display control unit 147 Power supply state determination unit 201 Difference content 202 Broadcast time 203 H Tunnel 300 difference information table

Claims (12)

A broadcast-related information acquisition unit that acquires broadcast-related information including information related to a broadcast program;
When the broadcast-related information acquired this time has changed with respect to the broadcast-related information acquired last time, the difference content for the broadcast-related information acquired last time is extracted from the broadcast-related information acquired this time, and the extracted difference A difference information generation unit for generating difference information including contents;
A display control unit for displaying the difference information ,
When the display control unit includes a plurality of pieces of difference information including the same keyword difference content, the broadcast reception for determining the difference information to be displayed from the difference information including the keyword having the largest number of appearances. apparatus. The difference information generation unit
Generating the difference information further including a channel for broadcasting the program having the difference content;
The display control unit
Displaying the difference content and channel included in the difference information;
The broadcast receiving apparatus according to claim 1. The difference information generation unit
Generating the difference information further including a broadcast time of a program that broadcasts the difference content;
The display control unit
Displaying the difference content and broadcast time included in the difference information;
The broadcast receiving apparatus according to claim 1 or 2, characterized in that   The broadcast receiving apparatus according to any one of claims 1 to 3, wherein the difference information generation unit does not generate difference information of a program corresponding to an attribute designated in advance. The display control unit
Displaying the difference information at a timing based on a broadcast time of a program corresponding to the difference content indicated by the broadcast-related information;
The broadcast receiving apparatus according to any one of claims 1 to 4, wherein the broadcast receiving apparatus is provided. A viewing control unit configured to control so that a program that broadcasts the content of the displayed difference information can be viewed in response to an operation of designating the difference information being displayed;
The broadcast receiving apparatus according to any one of claims 1 to 5, wherein The viewing control unit
When a program that broadcasts the content of the difference information being displayed is currently being broadcast, control is performed so that an image of the program is displayed.
The broadcast receiving apparatus according to claim 6. The viewing control unit
If the program that broadcasts the content of the difference information being displayed is to be broadcast in the future, control to make a recording reservation for the program,
The broadcast receiving apparatus according to claim 6 or 7, characterized in that: A broadcast-related information acquisition step of acquiring broadcast-related information including information related to a broadcast program;
When the broadcast-related information acquired this time has changed with respect to the broadcast-related information acquired last time, the difference content for the broadcast-related information acquired last time is extracted from the broadcast-related information acquired this time, and the extracted difference A difference information generation step for generating difference information including content;
A display control step for displaying the difference information ,
When the display control step includes a plurality of pieces of difference information including the same keyword difference contents, the broadcast reception for determining the display target difference information from the difference information including the keyword having the largest number of appearances. Method. On the computer,
A broadcast-related information acquisition step of acquiring broadcast-related information including information related to a broadcast program;
When the broadcast-related information acquired this time has changed with respect to the broadcast-related information acquired last time, the difference content for the broadcast-related information acquired last time is extracted from the broadcast-related information acquired this time, and the extracted difference A difference information generation step for generating difference information including content;
When displaying the difference information, if there are a plurality of pieces of difference information including the same keyword difference contents, the difference information to be displayed is determined from the difference information including the keyword having the highest number of appearances. A display control step;
A program for running A broadcast-related information acquisition unit that acquires broadcast-related information including information related to a broadcast program;
When the broadcast-related information acquired this time has changed with respect to the broadcast-related information acquired last time, the difference content for the broadcast-related information acquired last time is extracted from the broadcast-related information acquired this time, and the extracted difference A difference information generation unit for generating difference information including contents;
A display control unit for displaying the difference information,
When there are a plurality of pieces of difference information including the same keyword difference contents in a plurality of pieces of difference information, the display control unit determines the difference information to be displayed from the difference information including the keyword having the largest number of appearances. If there is not a plurality of difference information including the same keyword difference content, the priority of the keyword in each difference content is determined, and the difference information to be displayed from the difference information including the keyword with the highest priority Broadcast receiving device to determine . The display control unit
  Display the difference information together with content different from the program
  The broadcast receiving apparatus according to claim 11.

Images