JP2008113326A - Broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent re-output of broadcast immediately before starting CM broadcast in a channel selected by a viewer. <P>SOLUTION: This broadcast receiver is provided with: first broadcast receiving parts 1, 3 which generate a first broadcasting signal; second broadcast receiving parts 2, 4 which generate a second broadcasting signal; a commercial broadcast detection part 7 which detects a start point and an end point of the CM broadcast; a broadcasting signal storage part 5 which stores a broadcasting signal before starting a CM; a broadcasting signal comparison part 6 which calculates a degree of similarity between the first broadcasting signal and the broadcasting signal before starting the CM when the end point of the CM broadcast is detected and judges that the broadcasting signals are not similar to each other when the degree of similarity exceeds a threshold and a channel selection determination means 9a which generates a control signal for switching output of an output part from the second broadcasting signal to the first broadcasting signal and outputs the control signal to the output part when the broadcasting signal comparison part 6 judges that the broadcasting signals are not similar to each other and when the output part outputs the second broadcasting signal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a broadcast receiving apparatus that prevents a broadcast immediately before the start of commercial broadcast in a channel selected by a viewer from being output again.

  Conventionally, when a program being watched is switched to a commercial broadcast (hereinafter referred to as a CM broadcast), a viewer of a television broadcast does not want to view the CM broadcast. Often, other channels were tuned by operating. Then, the viewer himself predicted the end point of the CM broadcast, and returned to the original channel he was viewing by operating the remote control.

  However, while a TV broadcast viewer is watching a program of another channel during a CM broadcast, the program that was originally viewed starts, and a part of the program that was originally viewed is missed. was there.

  Therefore, when the program of the channel that the viewer of the television broadcast is watching becomes a CM broadcast, it automatically switches to the state of receiving the broadcast of the other channel, and the CM broadcast of the channel that was originally viewed ends. A television signal receiving apparatus that automatically switches to the original channel has been proposed (Patent Document 1).

Also, the start and end of the CM broadcast of the broadcast program of the channel being watched by the viewer of the television broadcast is detected, and during CM broadcast, the channel being broadcast is displayed on the main screen, and at least one other channel is displayed. Switch automatically at fixed time intervals according to the desired setting, display broadcast programs of other channels on at least one sub-screen, stop the sub-screen display when the CM broadcast ends, and tune on the main screen There has been proposed an automatic channel selection method characterized by displaying only the broadcast program of the middle channel. (Patent Document 2).
Japanese Patent Publication No.8-8668 JP 2003-219307 A

  However, in recent television broadcasts, especially in variety, dramas, and animation programs, broadcasts immediately before the start of CM (hereinafter referred to as pre-CM start broadcast) are often broadcast as they are or after digest. .

  Therefore, in the television signal receiving device described in Patent Document 1 and the automatic channel selection method described in Patent Document 2, the broadcast before the CM start is broadcast again after the CM broadcast ends. I had to watch it.

  However, since the content of the pre-CM start broadcast is the same as the content once viewed for the viewer, many viewers dislike viewing this pre-CM start broadcast again.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a broadcast receiving apparatus that prevents a pre-CM broadcast on a channel selected by a viewer from being output again.

  In order to achieve the above object, a first feature of a broadcast receiving apparatus according to the present invention is that a channel selection unit that selects a first channel and a second channel from among a plurality of broadcast channels, and a channel selection unit that selects a channel. A first broadcast receiving unit that receives the broadcast wave of the first channel that has been stationed and generates a first broadcast signal; and a broadcast wave of the second channel that is selected by the channel selection unit; A second broadcast receiving unit that generates the first broadcast signal, an output unit that switches the first broadcast signal and the second broadcast signal based on the supplied control signal, and outputs the first broadcast signal. The commercial broadcast detection unit for detecting the start time and the end time of the included CM broadcast, and the reception from the start time of the CM broadcast detected by the commercial broadcast detection unit to a time point that goes back a predetermined time. The first broadcast signal is C When the broadcast signal storage unit that stores the pre-start broadcast signal and the commercial broadcast detection unit detects the end point of the CM broadcast, the first broadcast signal until the predetermined time elapses from the end point and the pre-CM start broadcast When the degree of similarity with the signal is calculated and the degree of similarity is less than or equal to a predetermined threshold, it is determined that the first broadcast signal and the broadcast signal before CM start are similar, and the degree of similarity exceeds the threshold In this case, it is determined that the broadcast signal comparison unit that performs the determination process for determining that the first broadcast signal and the pre-CM broadcast signal are not similar and the broadcast signal comparison unit are not similar, and the output unit is the second In the case where a broadcast signal is output, a channel selection determination unit is provided that generates a control signal for switching the output of the output unit from the second broadcast signal to the first broadcast signal and supplies the control signal to the output unit.

  In order to achieve the above object, a second feature of the broadcast receiving apparatus according to the present invention is that the output unit supplies the video signal included in the first broadcast signal and the video signal included in the second broadcast signal. Having a synthesizer for synthesizing or de-synthesizing based on the control signal to be generated, the broadcast signal comparing unit determines that they are not similar, and the synthesizer determines the video signal of the first broadcast signal and the video of the second broadcast signal If the signal is combined with the signal, the combination of the combiner is canceled and a control signal for controlling to output only the video signal of the first broadcast signal is generated and supplied to the combiner of the output unit And determining means.

  In order to achieve the above object, a third feature of the broadcast receiving apparatus according to the present invention includes a program genre acquisition unit that acquires program genre data indicating a genre for each program content included in the first broadcast signal, The broadcast signal comparison unit includes a determination processing determiner that determines whether to perform determination processing within the broadcast period of the program content corresponding to the program genre data based on the acquired program genre data. The determination unit is a comparison unit that performs the determination process only during the broadcast period of the program content determined to be determined.

  With the broadcast receiving apparatus according to the present invention, it is possible to prevent the pre-CM start broadcast on the channel selected by the viewer from being output again.

  Embodiments of the present invention will be described below with reference to the drawings.

  In this embodiment, even if a channel originally viewed by a viewer (hereinafter referred to as a main viewing channel) is being broadcasted while another channel (hereinafter referred to as a secondary viewing channel) is selected by the viewer, A broadcast receiving apparatus that automatically switches to the main viewing channel without outputting the pre-CM broadcast of the viewing channel again will be described as an example.

  FIG. 1 is a block diagram showing an embodiment of a broadcast receiving apparatus according to the present invention.

  The broadcast receiving apparatus 100 according to the present embodiment includes a display unit 12 that displays an operation state of the broadcast receiving apparatus 100, an operation state operated by a user, and the like. An input unit 13 for generating a CM end automatic return switching request signal indicating an automatic return to the channel, an input signal for various settings, and a main viewing channel and a secondary viewing channel corresponding to the channel selection signal generated by the input unit 13 The channel selection unit 8 that performs channel selection, the first broadcast reception unit 1 that receives the broadcast wave of the main viewing channel selected by the channel selection unit 8, and the broadcast wave of the sub-viewing channel that is selected by the channel selection unit 8 The first video and audio that generates the first broadcast signal by performing signal processing for reproducing the broadcast wave received by the first broadcast receiving unit 1 and the second broadcast receiving unit 1 Trust A second video / audio signal processing unit 4 for generating a second broadcast signal by performing signal processing for reproducing the broadcast wave received by the processing unit 3 and the second broadcast receiving unit 2; And an output unit 20 that switches and outputs one broadcast signal and a second broadcast signal based on a supplied control signal.

  In addition, the broadcast receiving apparatus 100 according to the present embodiment includes a commercial broadcast detection unit 7 that detects the start time and the end time of the CM broadcast from the first broadcast signal generated by the first video / audio signal processing unit 3; A broadcast signal storage unit that stores the first broadcast signal received from the start point of the CM broadcast detected by the commercial broadcast detection unit 7 to a time point that goes back a predetermined time set in advance as a pre-CM start broadcast signal. 5 and when the commercial broadcast detection unit 7 detects the end point of the CM broadcast, the degree of similarity between the first broadcast signal and the broadcast signal before the start of CM is calculated from the end point until a predetermined time elapses. When the degree of similarity is less than or equal to a predetermined threshold, it is determined that the first broadcast signal and the pre-CM broadcast signal are similar, and when the degree of similarity exceeds the threshold, the first release signal is released. The broadcast signal comparison unit 6 that performs determination processing for determining that the signal and the broadcast signal before CM start are not similar, the control unit 9 that performs central control of the broadcast reception device 100, and the broadcast reception device 100 such as a broadcast reception program. Includes a storage unit 15 that stores programs necessary for performing various processes and various setting values.

  When the control unit 9 determines that the broadcast signal comparison unit 6 is not similar by executing the broadcast reception program stored in the storage unit 15 and the output unit 20 outputs the second broadcast signal A channel selection determination unit 9 a that generates a control signal for switching the output of the output unit 20 from the second broadcast signal to the first broadcast signal and supplies the control signal to the output unit 20 is implemented.

  In addition, the output unit 20 outputs the video signal included in the first broadcast signal generated by the first video / audio signal processing unit 3 and the second broadcast signal generated by the second video / audio signal processing unit 4. A video switching / synthesizing unit 10 that performs switching to or a combination of the video signals included in the video signal and a synthesis cancellation thereof, and an audio signal included in the first broadcast signal generated by the first video / audio signal processing unit 3 An audio switching unit 17 that switches the audio signal included in the second broadcast signal generated by the video / audio signal processing unit 4, and a display panel or a display panel according to the signals from the video switching synthesis unit 10 and the audio switching unit 17 And an output control unit 11 that transmits an output signal to an output device such as a recording device.

  Next, the processing procedure of the broadcast receiving apparatus 100 according to the present embodiment will be described with reference to the flowchart of FIG.

  First, the control unit 9 receives the channel selection signal of the main viewing channel of the television broadcast received by the input unit 13, and transmits the received channel selection signal to the channel selection unit 8. And the channel selection part 8 which received the channel selection signal transmits this channel selection signal to the 1st broadcast receiving part 1. FIG. Thereby, the selected channel is set as the main viewing channel (step S1).

  The first broadcast receiving unit 1 receives the broadcast wave of the main viewing channel selected by the channel selection unit 8 as the first broadcast wave.

  Next, the first video / audio signal processing unit 3 performs signal processing for reproducing the first broadcast wave received by the first broadcast receiving unit 1 to generate a first broadcast signal (step S2). ). Then, the first video / audio signal processing unit 3 stores the generated first broadcast signal in the broadcast signal storage unit 5 (step S3).

  Then, the commercial broadcast detection unit 7 detects the start time and end time of the CM broadcast from the first broadcast signal generated by the first video / audio signal processing unit 3, and the detected start time or end time of the CM broadcast Is transmitted to the control unit 9.

  When the CM broadcast state data received from the commercial broadcast detection unit 7 is data indicating the start time of the CM broadcast (step S4), the control unit 9 sends the first video / audio signal processing unit 3 to the first video / audio signal processing unit 3. A signal for stopping the storage processing of the broadcast signal is transmitted (step S5).

  As a result, the control unit 9 causes the broadcast signal storage unit 5 to store the first broadcast signal received until the CM broadcast start time detected by the commercial broadcast detection unit 7 as the pre-CM start broadcast signal. Can do.

  Further, by setting a time for the user or the like to be stored in the broadcast signal storage unit 5 in advance, the control unit 9 can set a predetermined time from the start point of the CM broadcast detected by the commercial broadcast detection unit 7. The first broadcast signal received up to the point in time can be stored in the broadcast signal storage unit 5 as a pre-CM broadcast signal.

  Specifically, for example, the control unit 9 stores the first broadcast signal until a predetermined time elapses after the first video / audio signal processing unit 3 starts storing the first broadcast signal. 1 is controlled so that after a predetermined time elapses, the control unit 9 deletes the stored broadcast signals in order from the oldest broadcast signal and stores the new first broadcast signal. The first video / audio signal processing unit 3 is controlled. Accordingly, the first video / audio signal processing unit 3 can store the latest first broadcast signal corresponding to a predetermined time in the broadcast signal storage unit 5 as a broadcast signal before the start of CM. 5 storage capacity can be reduced. The predetermined time can be set by inputting a value of about 10 seconds to 30 seconds from the input unit 13 by a provider or a user in advance.

  In the processes of steps S3 to S5 described above, the first video / audio signal processing unit 3 stores in the broadcast signal storage unit 5 a broadcast signal other than the CM broadcast in the first broadcast signal as a pre-CM broadcast signal. Can do.

  Next, the channel selection determining means 9a of the control unit 9 determines whether or not a CM end automatic return switching request indicating automatic return to the main viewing channel has been input. The process proceeds to step S7 (step S6).

  On the other hand, when the channel selection determining means 9a of the control unit 9 determines that the CM end automatic return switching request has not been input, the commercial broadcast detection unit 7 receives CM broadcast state data indicating that the CM broadcast has ended. If received, the process proceeds to step S3, and storage of the first broadcast signal in the broadcast signal storage unit 5 is started (step S13).

  Next, when it is determined that the CM end automatic return switching request has been input, the control unit 9 receives the channel selection signal of the television broadcast sub-viewing channel received by the input unit 13, and receives the received channel selection signal. Transmit to the tuning unit 8. Then, the channel selection unit 8 that has received the channel selection signal transmits the channel selection signal to the second broadcast reception unit 2. Thereby, the selected channel is set as a sub-viewing channel (step S7).

  Then, the second broadcast receiving unit 2 receives the broadcast wave of the sub-viewing channel selected by the channel selection unit 8 as the second broadcast wave.

  Next, the second video / audio signal processing unit 4 generates a second broadcast signal from the second broadcast wave received from the second broadcast receiving unit 2. Then, the video switching / synthesizing unit 10 receives the video signal among the generated second broadcast signals, and switches or synthesizes the received video signal with the video signal of the first broadcast signal (step S8).

  Here, the switching of the video signal refers to, for example, changing the output source of the full screen video from the video signal of the first broadcast signal to the video signal of the second broadcast signal. For example, as in picture-in-picture, the video signal of the first broadcast signal is displayed in full screen, and the video signal of the second broadcast signal is displayed in a small screen.

  The audio switching unit 17 receives the audio signal of the second broadcast signal, and switches the received audio signal to the audio signal of the first broadcast signal (step S8).

  Next, when the commercial broadcast detection unit 7 detects the end point of the CM broadcast from the first broadcast signal received from the first video / audio signal processing unit 3 (step S9), the end point of the detected CM broadcast is detected. Is transmitted to the broadcast signal comparison unit 6.

  Then, the broadcast signal comparison unit 6 that has received the CM broadcast state data by the commercial broadcast detection unit 7 receives the first broadcast signal and the broadcast signal storage unit 5 until a predetermined time elapses after the end of the CM broadcast. The degree of similarity with the pre-CM start broadcast signal stored in is calculated, and when the degree of similarity is equal to or less than a predetermined threshold, it is determined that the first broadcast signal and the pre-CM start broadcast signal are similar, and similar. If the degree exceeds the threshold, a determination process is performed to determine that the first broadcast signal is not similar to the pre-CM broadcast signal (step S10).

  Specifically, in order to perform the similar or dissimilar determination process in step 10, there are the following video comparison methods, and either method may be adopted.

  For example, there is a video comparison method by motion vector analysis. This is between the video signal included in the first broadcast signal until the predetermined time elapses from the end point of the CM broadcast and the video signal included in the pre-CM broadcast signal stored in the broadcast signal storage unit 5. The code amount of the motion vector is calculated, and when the calculated code amount of the motion vector exceeds a predetermined threshold, it is determined that the two video signals are not similar.

  Also, a video comparison method based on luminance signal analysis may be used. This is because YCbCr () is used for the video signal included in the first broadcast signal and the video signal included in the pre-CM broadcast signal stored in the broadcast signal storage unit 5 until the predetermined time has elapsed since the end of the CM broadcast. (Y: Luminance signal, CbCr: Color difference signal) When the difference value of the Y value is calculated and the sum of the difference values calculated over the entire video signal exceeds a predetermined threshold, both video signals are not similar Judgment.

  Further, the closed caption information superimposed on Line 21 of the first broadcast signal from the end point of the CM broadcast until a predetermined time elapses is extracted, and the extracted closed caption data and the CM stored in the broadcast signal storage unit 5 are extracted. It is determined whether or not both video signals are similar or dissimilar based on whether or not the difference between the pre-start broadcast signal and the closed caption data is within a predetermined threshold, or until the predetermined time elapses after the end of the CM broadcast. The subtitle data superimposed on the video signal of one broadcast signal is extracted, and the difference between the extracted subtitle data and the subtitle data of the pre-CM broadcast signal stored in the broadcast signal storage unit 5 is within a predetermined threshold. It is also possible to determine the similarity or dissimilarity of both video signals depending on whether or not.

  Here, if this threshold is too high, it is determined that the two video signals are always similar, and the sub-viewing channel is not switched to the main viewing channel. If it is too low, the pre-CM broadcast signal is output again. For this reason, it is necessary for the provider or the like to calculate an appropriate value based on the actual measurement in advance, such as 95%, and for the provider or the user to set an appropriate value in advance.

  As described above, the broadcast signal comparison unit 6 uses the video comparison method as described above, for example, the first broadcast signal and the broadcast signal before the CM start until a predetermined time elapses from the end of the CM broadcast. When the degree of similarity is less than or equal to a predetermined threshold, it is determined that the first broadcast signal and the pre-CM broadcast signal are similar, and the degree of similarity exceeds the threshold Can perform determination processing for determining that the first broadcast signal is not similar to the pre-CM broadcast signal.

  The broadcast signal comparison unit 6 repeatedly executes the determination process in step S10 while determining that the first broadcast signal and the broadcast signal before CM start are similar, and the first broadcast signal and the broadcast before CM start. When it is determined that the signal is not similar (step S11), a pre-CM start broadcast end signal is transmitted to the channel selection determination unit 9a of the control unit 9.

  Then, the channel selection determination unit 9a of the control unit 9 that has received the pre-CM broadcast end signal causes the video switching synthesis unit 10 and the audio switching unit 17 to switch the second broadcast signal to the first broadcast signal for output. The control signal is generated and transmitted. (Step S12).

  Specifically, the channel selection determination unit 9a of the control unit 9 switches the output source from the second broadcast signal to the first broadcast signal and outputs the switching signal to the video switch combining unit 10, or the first broadcast signal. And a second broadcast signal are canceled, and a combination cancellation signal for outputting the first broadcast signal is transmitted. Then, the video switching / combining unit 10 that has received the switching signal or the combination cancellation signal outputs a first broadcast signal based on the received signal.

  Further, the channel selection determining means 9a of the control unit 9 transmits a switching signal to the audio switching unit 17, and the audio switching unit 17 that has received the switching signal converts the audio signal of the second broadcast signal into the first broadcast signal. Switch to audio signal and output.

  As described above, when the degree of similarity between the first broadcast signal after the end of the CM broadcast and the predetermined time elapses and the pre-CM start broadcast signal exceed a predetermined threshold, When it is determined that the broadcast signal and the broadcast signal before the start of CM are not similar, and when it is determined that they are not similar, the output of the output control unit 11 can be set to the first broadcast signal that is the main viewing channel.

  As a result, even if the main viewing channel that is mainly viewed by the viewer is being broadcasted while another channel is selected by the viewer, the main viewing channel can be selected without being output again before the commercial starts. The main viewing channel can be output by switching the channel to the main channel or canceling the synthesis, and it is possible to prevent the viewer from viewing the pre-CM start broadcast again.

  FIG. 3 is a timing chart showing the processing results of the broadcast receiving apparatus 100 according to the present embodiment in time series.

  As shown in FIG. 3, the main viewing channel 101 indicates a channel selected by the first broadcast receiving unit 1, and the broadcast signal storage 102 indicates a period during which the broadcast signal is stored in the broadcast signal storage unit 5. The secondary viewing channel 103 indicates a channel selected by the second broadcast receiving unit 2, and the output channel 104 indicates a channel output by the output control unit 11.

  Here, “A1”, “A2”... Shown in FIG. 3 indicate program broadcast of the “A” channel, “CM1”, “CM2”... Indicate CM broadcast, and “B1” indicates , "B" channel program broadcast.

  First, at time T0, the control unit 9 receives the “A” channel as a channel selection signal of the main viewing channel of the television broadcast received by the input unit 13, and the channel selection unit 8 uses the main broadcast channel 1 of the first broadcast reception unit 1. The viewing channel is set to “A”.

  Then, as shown in the broadcast signal storage 102, after the time T0, the first video / audio signal processing unit 3 stores the broadcast signal of the “A” channel in the broadcast signal storage unit 5 as a pre-CM start signal.

  Next, at time T1, a CM end automatic return switching request indicating automatic return to the main viewing channel is input.

  Next, at time T3, the commercial broadcast detection unit 7 detects the start of the CM broadcast “CM1” from the first broadcast signal, and the first video / audio signal processing unit 3 detects the broadcast signal of the “A” channel. Stop the storage process.

  Thereby, as shown in the broadcast signal storage 102, the first video / audio signal processing unit 3 can store a broadcast signal other than the CM broadcast among the broadcast signals of the “A” channel as the pre-CM start broadcast signal. .

  If the first broadcast signal for a predetermined time is set to be stored, the control unit 9 determines that the “A” channel broadcast signal for a predetermined time until T3 is a pre-CM broadcast signal. The first video / audio signal processing unit 3 is controlled so as to be stored in the broadcast signal storage unit 5.

  Next, as shown in the sub-viewing channel 103, at time T4, the control unit 9 receives the “B” channel as the channel selection signal of the sub-viewing channel of the television broadcast received by the input unit 13, and the channel selection unit 8 The secondary viewing channel of the second broadcast receiving unit 2 is set to “B”.

  Then, the video switching / combining unit 10 receives the video signal from the signal-processed “B” channel broadcast signal, and the received video signal is converted to the “A” channel video signal from the first broadcast receiving unit 1. Switch or combine.

  The audio switching unit 17 receives an audio signal among the signal-processed “B” channel broadcast signals, and switches the received audio signal to the “A” channel audio signal from the first broadcast receiving unit 1. .

  As a result, as shown in the output channel 104, the broadcast signal of the “B” channel has been output by the output control unit 11 after the time T4.

  Next, as shown in the main viewing channel 101, at T5, the commercial broadcast detection unit 7 detects the end point of the CM broadcast “CM1” from the “A” channel broadcast signal from the first broadcast receiving unit 1. Then, CM broadcast state data indicating the end point of the detected CM broadcast “CM1” is transmitted to the broadcast signal comparison unit 6.

  Then, as shown in the main viewing channel 101, after the time T5, the broadcast signal comparison unit 6 broadcasts the broadcast signal “A2” received by the first broadcast receiving unit 1 and the broadcast signal storage 102 as shown in FIG. The broadcast signals “A1” and “A2” stored in the signal storage unit 5 as the pre-CM broadcast signal are compared.

  Specifically, for example, the broadcast signal comparison unit 6 uses the video signal of the first broadcast signal “A2” at the end of the broadcast of the CM broadcast “CM1”, that is, at T5, and the broadcast signal storage unit 5 before the CM starts. The code amount of the motion vector between all the video signals “A1” and “A2” stored as the broadcast signal is calculated. Then, the broadcast signal comparison unit 6 has the code amount of the video signal “A2” at T5 and the first broadcast signal “A2” stored by the broadcast signal storage unit 5 at T2 within a predetermined threshold. Therefore, it is determined that both video signals are similar, and the comparison process is continued until T6 o'clock.

  At time T6, the first broadcast signal is “A3” as shown in the main viewing channel 101, and the pre-CM broadcast signal stored in the broadcast signal storage unit 5 as shown in the broadcast signal storage 102. Are “A1” and “A2”, the broadcast signal comparison unit 6 determines that the code amounts of both broadcast signals exceed a predetermined threshold and the two broadcast signals are not similar.

  Therefore, the channel selection determining unit 9a of the control unit 9 transmits the switching signal or the combination canceling signal to the video switching combining unit 10, and the video switching combining unit 10 that has received the switching signal or the combination canceling signal receives the current output control unit 11. The video signal of the “B” channel that is the sub-viewing channel being output to is switched to the video signal of the “A” channel that is the main viewing channel, or the synthesis is canceled.

  At the same time, the channel selection determining means 9 a of the control unit 9 transmits a switching signal to the audio switching unit 17, and the audio switching unit 17 that has received the switching signal currently outputs to the output control unit 11. The "B" channel audio signal is switched to the main viewing channel "A" channel audio signal.

  As a result, as shown in the output channel 104, the broadcast signal of the “A” channel has been output by the output control unit 11 after T6.

  As described above, when the degree of similarity between the first broadcast signal from the end of the CM broadcast until the predetermined time elapses and the broadcast signal before the CM start exceeds the threshold, the first broadcast signal If it is determined that the broadcast signal is not similar to the pre-CM start broadcast signal, and it is determined that the broadcast signal is not similar, the output of the output control unit 11 is set to the first broadcast signal that is the main viewing channel. This allows the selected channel “B” to be switched to the original channel “A” when the pre-CM broadcast “A2” of the channel “A” originally selected by the viewer ends. Can be prevented from being output again before the CM start broadcast “A2” that has already been viewed.

<Modification 1>
FIG. 4 is a block diagram illustrating a configuration of the broadcast receiving apparatus 200 according to the first modification.

  In the broadcast receiving apparatus 100 according to the present embodiment, similar or dissimilar broadcast signal determination processing is executed for all program genres, and the output channel of the output control unit 11 is set based on the determination result. The broadcast receiving apparatus 200 according to the modification 1 acquires program genre data, and determines whether or not to perform broadcast signal determination processing according to the acquired program genre data.

  As shown in FIG. 4, in addition to the configuration of the broadcast receiving apparatus 100 according to the present embodiment, the broadcast receiving apparatus 200 according to the modification 1 further uses the first broadcast wave from the first broadcast wave. A program genre acquisition unit 16 that acquires program genre data indicating a genre of a program to be broadcast, and a memory that stores genre determination data indicating whether or not the broadcast signal comparison unit 6 is to execute determination processing for each program genre data. And a determination processing determiner 6a for determining whether to perform determination processing within the broadcast period of the program content corresponding to the program genre data based on the acquired program genre data.

  FIG. 5 is a flowchart showing a processing procedure of the broadcast receiving apparatus according to the first modification.

  As shown in FIG. 5, after the main viewing channel of the first broadcast receiving unit 1 is set (step S1), the program genre acquiring unit 16 starts the program of the first broadcast wave from the first broadcast wave. Program genre data indicating the genre is acquired (step S14).

  Here, the program genre data is data indicating the genre of the program. For example, codes uniquely assigned to genres classified into news reports, sports, information wide shows, movies, music, dramas, varieties, animations, and the like according to program contents are shown.

  The storage unit 15 stores genre determination data associated with the program genre data and indicating whether or not the broadcast signal comparison unit 6 is to execute determination processing.

  For example, “news report”, “sports”, “information wide show”, which is a program genre that rarely re-broadcasts before the start of CM, as a program genre that does not cause the broadcast signal comparison unit 6 to perform comparison determination processing, “Movie”, “Music”, “Documentary / Liberal Arts”, “Hobby Education”, “Welfare”, and the like are stored in the storage unit 15 in advance.

  Then, as a program genre that causes the broadcast signal comparison unit 6 to execute a comparison determination process, “drama”, “variety”, “animation”, “special effects” are program genres that are often rebroadcasted before the CM starts. Are stored in the storage unit 15 in advance.

  Then, the determination processing determiner 6a of the broadcast signal comparison unit 6 reads genre determination data corresponding to the program genre data acquired by the program genre acquisition unit 16 from the storage unit 15, and based on the read genre determination data, the broadcast signal The comparison unit 6 determines whether or not to execute the determination process (step S14).

  As a result, the determination processing determiner 6a, when the program indicated by the program genre data acquired by the program genre acquisition unit 16 is a program genre that often re-broadcasts before the start of CM, the broadcast signal comparison unit 6a. When the program indicated by the program genre data acquired by the program genre acquisition unit 16 is a program genre that is unlikely to be rebroadcasted before the CM starts, the broadcast signal comparison unit 6 performs the determination process. Can be skipped.

  As described above, the determination process determination unit 6a acquires the program genre information of the program, and determines whether or not to execute the determination process of the broadcast signal according to the acquired program genre, so that the broadcast signal comparison unit 6 Can be reduced.

  In the above description, the program genre data is acquired from the broadcast wave. However, the program genre data is not only acquired from the broadcast wave, but the program prepared by the program information provider, for example, using the Internet or the like. It may be obtained by accessing an information providing server.

It is the block diagram which showed one Embodiment of the broadcast receiver which concerns on this invention. It is the flowchart which showed the process sequence of the broadcast receiver which concerns on this embodiment. It is the timing chart which showed the processing result of the broadcast receiver which concerns on this embodiment in time series. It is a block diagram which shows the structure of the broadcast receiving apparatus which concerns on the modification 1. 10 is a flowchart showing a processing procedure of a broadcast receiving apparatus according to Modification 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... 1st broadcast receiving part 2 ... 2nd broadcast receiving part 3 ... 1st video / audio signal processing part 4 ... 2nd video / audio signal processing part 5 ... Broadcast signal storage part 6 ... Broadcast signal comparison part 6a ... Judgment processing decision unit 7 ... commercial broadcast detection unit 8 ... channel selection unit 9 ... control unit 9a ... channel selection determination unit 10 ... video switching synthesis unit (synthesizer)
DESCRIPTION OF SYMBOLS 11 ... Output control part 12 ... Display part 13 ... Input part 15 ... Memory | storage part 16 ... Program genre acquisition part 17 ... Audio | voice switching part 20 ... Output part 100 ... Broadcast receiving apparatus

Claims (3)

A broadcast wave of a first channel that is one of a plurality of broadcast channels in a television broadcast and a broadcast wave of a second channel that is one channel other than the first channel are received simultaneously. A broadcast receiving device,
A channel selection unit that selects each of the first channel and the second channel from the plurality of broadcast channels;
A first broadcast receiving unit that receives a broadcast wave of the first channel selected by the channel selection unit and generates a first broadcast signal;
A second broadcast receiving unit that receives a broadcast wave of the second channel selected by the channel selection unit and generates a second broadcast signal;
An output section for switching and outputting the first broadcast signal and the second broadcast signal based on a supplied control signal;
A commercial broadcast detection unit for detecting a start time and an end time of a CM broadcast included in the first broadcast signal;
A broadcast signal for storing the first broadcast signal received as a pre-CM start broadcast signal from the commercial broadcast detection unit detected by the commercial broadcast detection unit to a predetermined time before the CM broadcast start time. A storage unit;
When the commercial broadcast detection unit detects the end point of the CM broadcast, the degree of similarity between the first broadcast signal and the broadcast signal before the start of CM is calculated from the end point until the predetermined time elapses. When the degree of similarity is less than or equal to a predetermined threshold, it is determined that the first broadcast signal and the broadcast signal before CM start are similar, and when the degree of similarity exceeds the threshold, A broadcast signal comparison unit that performs a determination process that determines that the first broadcast signal and the pre-CM broadcast signal are not similar;
When it is determined that the broadcast signal comparison unit is not similar and the output unit outputs the second broadcast signal, the output of the output unit is changed from the second broadcast signal to the first broadcast signal. A broadcast receiving apparatus comprising: a channel selection determining unit that generates a control signal for switching to and outputs the control signal to the output unit. The output unit is
A synthesizer that synthesizes or de-combines the video signal included in the first broadcast signal and the video signal included in the second broadcast signal based on a supplied control signal;
When the broadcast signal comparison unit determines that they are not similar, and the combiner combines the video signal of the first broadcast signal and the video signal of the second broadcast signal, the combiner combines Channel selection determination means for generating a control signal for controlling to output only the video signal of the first broadcast signal, and supplying the control signal to the combiner of the output unit;
The broadcast receiving apparatus according to claim 1, further comprising: A program genre acquisition unit that acquires program genre data indicating a genre for each program content included in the first broadcast signal;
The broadcast signal comparison unit has a determination processing determiner that determines whether or not to perform the determination processing within a broadcast period of program content corresponding to the program genre data based on the acquired program genre data, The broadcast receiving apparatus according to claim 1, wherein the broadcast receiving apparatus is a comparison unit that performs the determination process only within a broadcast period of the program content determined to be determined by the determination process determiner.

Images