JP2000350112A - Digital broadcast receiver - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To automatically determine program switching in digital broadcasting, and at that timing, an electronic program guide (E).
PG) is automatically hidden. SOLUTION: 1 is a tuner, 2 is a demodulation means for performing digital demodulation and outputting TS as digital data,
Reference numeral 3 denotes packet separating means for separating each data packet from the TS. The control CPU 7 controls the video format input from the video decoding means 4 and the audio decoding means 5,
A change in each format is detected based on format data indicating the audio format. Then, when either the video format or the audio format is switched and the format data changes, the control CPU 7 instructs the non-display of the EPG from the control CPU 7.
Is output to the synthesizing means 8, and the display of the EPG is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast receiver for receiving digital broadcasts, and more particularly, to an electronic program guide (hereinafter referred to as EP).
G. The present invention relates to a digital broadcast receiver for controlling the display of (1).

[0002]

2. Description of the Related Art In digital broadcasting, transmission signals such as video, audio and data information are multiplexed in accordance with the MPEG2 system, and each data of the digital broadcasting signal is transmitted in units of packets (Transport Stream Packet). Multiplexed streams (Transport Stream,
Hereinafter, it is called TS. ). Also, this T
In S, data of program arrangement information (Service Information, hereinafter referred to as SI) is also multiplexed. The SI data includes data indicating information such as the channel name of the service, the title of each program, the start / end time, the duration, the content and the progress status.
By separating and extracting the data indicating I, a screen of an electronic program guide (EPG), which is a program list, can be configured and provided to the viewer simultaneously with ordinary video and audio.

FIG. 18 is a block diagram showing a configuration example of a conventional digital broadcast receiver. In FIG. 18, 101 is a tuner, 102 is a demodulation means for performing digital demodulation and outputting TS as digital data;
103 is a packet separating means (DEMUX) for separating each data packet from the TS, 104 is a video decoding means for decoding video data, 105 is an audio decoding means for decoding audio data, and 106 is a display screen of an EPG from data information. EPG display processing means for performing the constituent processing; 107, a control CPU; 108, a synthesizing means for synthesizing a video signal and an audio signal with a display screen of an EPG based on control data from the control CPU 107; The device 110 is a remote controller. Each block 101-
Reference numerals 106 and 108 are connected to the control CPU 107. The control CPU 107 determines control data based on data and the like from each block and controls operations such as reception of digital data and image display.

Next, the operation of the above-mentioned conventional digital broadcast receiver will be described. A signal received by a receiving antenna (not shown) is input to the tuner 101, and the tuner 101 receives control data indicating a selected channel from the control CPU 107 and selects a channel. The channel-selected received signal is sent to demodulation means 102 and demodulation means 1
02, digital demodulation is performed.
TS (Tran) including the selected program according to the control data from
sport Stream) is selected, and the TS is output as digital data.

[0005] The packet separating means 103 separates and extracts packets of the selected program from the input TS, and outputs video data and audio data of the program. The packet separating means 103 further stores program arrangement information (Service Informati) transmitted simultaneously in the TS.
on) is separately extracted and output to the EPG display processing means 106. In the packet separating means 103, a transmission control signal (PSI,
Program specific information), time information, and the like are extracted, and these are sent to the control CPU 107 as control information, and control data for controlling packet separation is sent from the control CPU 107 based on the information.

The video data output from the packet separating means 103 is encoded by MPEG2, and the video decoding means 104 decodes the video data and outputs a video signal. In the video decoding means 104, the decoding operation is performed based on the control data from the control CPU 107. At the time of decoding, data such as a sequence header and a sequence end code in the video data is identified, and the image size, the aspect ratio, etc. Data indicating the video format based on the ratio, the scanning method and the frame frequency, the start of a sequence, the detection of a sequence end code (sequence end code), and the like are sent from the video decoding unit 104 to the control CPU 107.

The audio data output from the packet separating means 103 is also encoded. The audio decoding means 105 decodes the audio data and outputs an audio signal. In the audio decoding means 105, the decoding operation is performed by the control CPU 10 like the video decoding means 104.
The decoding is performed based on the control data from the control unit 7 and the data such as the header in the audio data is identified at the time of decoding. ing. The above video decoding means 104
The video signal and the audio signal output from the audio decoding unit 105 are both sent to the synthesizing unit 108.

Next, program sequence information (SI data) output from the packet separating means 103 to the EPG display processing means 106 will be described.

FIG. 19 is a diagram showing an example of a display screen of the EPG. The EPG display processing means 106 processes the input SI data to form an EPG display screen,
A signal indicating the G display screen is output. As described above, S
The I data includes information such as a channel name, a title of each program, a start / end time, a progress state, and the like. The EPG display processing means 106 performs processing based on these data, for example, as shown in FIG. Configure the display screen. The EPG display screen signal output from the EPG display processing means 106 is sent to the synthesizing means 108.

As described above, the synthesizing means 108 includes the video signal from the video decoding means 104 and the audio decoding means 10
5 and the EPG display screen signal from the EPG display processing means 106,
Based on the control data from 07, they are combined, and the combined display signal is displayed on the display device 109.

The synthesizing means 108 is controlled by the control CPU 10
7, various control data for performing the display operation are received. The control data h is a signal for synthesizing a display signal, and is formed based on data such as a video format and an audio format from each block described above. When the user operates the remote controller 110 to instruct selection of a reception channel, a program, and the like, and display, non-display, and the like of the EPG by the viewer's operation, the content of the operation is sent to the control CPU 107. Then, the control CPU 107
Then, control data r for instructing selection of a reception channel, a program, and the like, and display or non-display of the EPG are sent to the synthesizing unit 108.

Therefore, normally, based on the control data h from the control CPU 107, the synthesizing means 108 outputs the video signal and the audio signal of the selected program as display signals to the display device 109 as they are, and the display device 109 receives the input signals. The program video and the audio are provided to the viewer by the video signal and the audio signal that are the display signals.

On the other hand, when the viewer performs an operation of instructing display (or non-display) of the EPG on remote controller 110, the content of the operation is sent to control CPU 107, and control C is executed.
The control data r indicating the display (or non-display) of the EPG is output from the PU 107 to the synthesizing unit 108. That is, the control data r from the control CPU 107 is sent to the synthesizing unit 108 as control data instructing display of the EPG or as control data instructing non-display.

Therefore, when the display screen of the EPG is not displayed on the display device 109, the synthesizing means 108 converts the EPG display screen signal into a video signal based on the control data r instructing the EPG display from the control CPU 107. Thus, the display signal combined with the EPG is output to the display device 109.

When a display screen on which an EPG is synthesized is displayed on the display device 109, the viewer operates the remote controller 1.
When an operation for instructing non-display of the EPG is performed by the control unit 10, the control data r instructs not to display the EPG (no EPG display) from the control CPU 107.
08. The synthesizing unit 108 stops synthesizing the EPG on the display screen based on the control data r instructing non-display of the EPG from the control CPU 107,
Only the video and audio signals of the selected program are output to the display device 109 as display signals.

The method of synthesizing the EPG on the display screen may be a method of superimposing a normal video screen on the EPG display screen, or a method of dividing the screen into a normal video screen and the EPG display screen.
Some display the display screen at the same time.

[0017]

As described above, the conventional digital broadcast receiver uses the EPG only when the viewer operates the remote controller 110 to give an instruction to hide the EPG.
Is stopped, and the display device 109 is configured to hide the EPG. Therefore, as long as the viewer does not instruct the non-display of the EPG by operating the remote controller 110 or the like, the display screen of the EPG is synthesized on the display device 109 irrespective of the video and audio being broadcast. The image will be restricted. Therefore, in the conventional digital broadcast receiver, the display of the EPG is instructed at the end of the program that is a break of the program, the EPG is displayed during the commercial period, or the EPG is erased at the start of the program. For example, in order to erase the EPG, the viewer must instruct the display or non-display of the EPG by operating the remote controller 110 or the like, and there is a problem that the EPG cannot be automatically hidden.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to automatically determine a change of a program in a digital broadcast and to surely hide the EPG at that timing. It is to provide a digital broadcast receiver.

[0019]

A digital broadcast receiver according to the present invention receives a multiplexed stream as a digital broadcast signal and displays the selected program or the like in the digital broadcast receiver. Decoding means for decoding a video signal and an audio signal from a stream; and an electronic program guide (Electronic Progra
m Guide, hereinafter referred to as EPG. EPG that extracts and processes data related to the EPG and outputs an EPG display screen signal
Display processing means, detection means for detecting a change in state of video data and / or audio data being received based on data in the multiplexed stream, video signal, audio signal, and EPG display screen signal output from the decoding means And a synthesizing means for synthesizing the EPG display screen signal based on the detection result from the detecting means.

In the digital broadcast receiver according to the second aspect, the detecting means extracts information of the video format and / or the audio format from the video signal and the audio signal in the multiplexed stream, and detects a change in those formats. When a change in the video format and / or the audio format is detected,
The synthesizing means prevents the EPG display screen signal from being synthesized and automatically hides the EPG.

In the digital broadcast receiver according to the third aspect, the detecting means is configured as a means for detecting a sequence end code included in the video signal in the multiplex stream, and detects the sequence end code. At this time, the synthesizing means prevents the EPG display screen signal from being synthesized and automatically hides the EPG.

In the digital broadcast receiver according to a fourth aspect, the detecting means further includes means for counting a time after the sequence end code is detected, and the sequence end code is detected after an interval of a predetermined time or more. Only in this case, the synthesizing means does not synthesize the EPG display screen signal and automatically hides the EPG.

[0023] In the digital broadcast receiver according to claim 5, the detecting means detects the motion level based on the video signal in the multiplexed stream, or detects the audio level based on the audio signal in the multiplexed stream. And at least one of the sound detecting means for detecting the sound, and when either the image does not move or the sound does not sound, or when both states continue for a certain period of time, the synthesizing means detects the EPG. Do not combine display screen signals,
The PG is automatically hidden.

In the digital broadcast receiver according to the sixth aspect, the detecting means detects the motion level based on the video signal in the multiplexed stream, or detects the audio level based on the audio signal in the multiplexed stream. The video includes at least one of the following audio detection means, and either the video does not move, or there is no sound, or after both states continue for a certain period of time, the motion of the video or the sound When either or both start, the combining means does not combine the EPG display screen signal,
The EPG is automatically hidden.

In the digital broadcast receiver according to the seventh aspect, the motion detecting means includes means for obtaining a motion amount in a video frame from a motion vector in the video signal, and a motion in the video by comparing the motion amount with a predetermined value. Determination means for determining that there is no data.

In the digital broadcast receiver according to the eighth aspect, the sound detecting means determines the sound level of the sound signal in the predetermined period by comparing the sound level with the predetermined value. Means.

In the digital broadcast receiver according to the ninth aspect, the detecting means is configured as a means for detecting a subtitle signal in the multiplex stream, and when detecting the subtitle signal, the synthesizing means sets the EPG display screen. The signal is not synthesized, and the EPG is automatically hidden.

[0028] In the digital broadcast receiver according to the tenth aspect, the detecting means further extracts program break time data from program sequence information (hereinafter referred to as SI) in the multiplexed stream. The detection means detects a change in state of the video signal and / or the audio signal within a fixed time width before and after the break time of the program set by the break time data, and
This is to prevent the display screen signal from being automatically synthesized.

[0029] In the digital broadcast receiver according to the eleventh aspect, the detecting means includes a video signal in the multiplexed stream, and / or
Or a means for extracting information on a video format and / or an audio format from an audio signal and detecting a change in the video format and / or the audio format. When a change in the format and / or the audio format is detected, the synthesizing means does not synthesize the EPG display screen signal and automatically hides the EPG.

[0030] In the digital broadcast receiver according to the twelfth aspect, the detecting means is configured as a means for detecting a sequence end code included in the video signal in the multiplexed stream, and is provided before and after the break time of the program. When a sequence end code is detected with a fixed time width, the synthesizing means prevents the EPG display screen signal from being synthesized, and
Is automatically hidden.

In the digital broadcast receiver according to the thirteenth aspect, the detecting means detects the motion level based on the video signal in the multiplexed stream, or detects the audio level based on the audio signal in the multiplexed stream. And at least one of the sound detecting means, and the video does not move for a fixed time width before or after the break time of the program, or there is no sound, or both states are kept for a certain time. When the continuation is continued, the synthesizing unit prevents the EPG display screen signal from being synthesized, and automatically hides the EPG.

In the digital broadcast receiver according to the fourteenth aspect, the motion detecting means includes means for obtaining a motion amount in a video frame from a motion vector in the video signal, and a motion in the video by comparing the motion amount with a predetermined value. Determination means for determining that there is no data.

In the digital broadcast receiver according to the fifteenth aspect, the sound detecting means determines the sound level by comparing the sound level with a predetermined value, and determines the sound level by comparing the sound level with a predetermined value. Means.

[0034]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described.

Embodiment 1 FIG. 1 is a block diagram showing an example of the configuration of a digital broadcast receiver according to Embodiment 1 of the present invention.

In the figure, 1 is a tuner, 2 is a demodulation means for performing digital demodulation and outputting a TS as digital data, 3 is a packet separating means (DEMUX) for separating each data packet from the TS, and 4 is a video data. Video decoding means for decoding, 5 audio decoding means for decoding audio data, 6 EPG display processing means for performing processing for constructing an EPG display screen from data information, 7 control CPU, 8
Is a synthesizing means for synthesizing the video and audio signals and the display screen of the EPG based on the control data h from the control CPU 7, and 9 is a display device such as a display.

Reference numeral 10 denotes a remote controller, which transmits data and the like from each of these blocks to the control CPU 7, which receives a multiplexed stream as a digital broadcast signal and controls the display operation of the selected program. are doing.

Next, the operation of the above-described digital broadcast receiver will be described. A signal received by a receiving antenna (not shown) is input to the tuner 1 and the control CPU 7
The channel is selected according to the control data indicating the selected channel from. The received signal whose channel has been selected is sent to the demodulation means 2, which performs digital demodulation, selects a TS (Transport Stream) including the selected program, for example, according to control data from the control CPU 7.
S is output as digital data. The packet separating means 3 separates and extracts the packet of the selected program from the input TS, outputs the video data and the audio data of the program, and outputs the program sequence information (Serv
Ice Information) is separated and extracted.

Here, in the SI, data indicating information such as the channel name of the service, the title of each program, the start / end time, the continuation time, the content and the progress status are transmitted. By doing so, a display screen of an electronic program guide (EPG) which is a program list can be created and displayed on the screen. The packet separating means 3 extracts a transmission control signal (PSI), time information, and the like transmitted by the TS, and sends them to the control CPU 7 as control information. The control CPU 7 controls packet separation. Control data will be sent.

The video data output from the packet separating means 3 is coded by MPEG2 and sent to a video decoding means 4, where the video decoding means 4 decodes the video data and outputs a video signal. Then, the video decoding means 4
In this case, the decoding operation is performed based on the control data from the control CPU 7, and at the time of decoding, a sequence header and a sequence end code (Sequence End Code) in the video data are used.
Code, the end code of the sequence, hereafter referred to as SEC. ) Is identified, and data indicating the image size, aspect ratio, video format based on the scanning method and frame frequency, SEC detection, and the like are sent to the control CPU 7.

The audio data output from the packet separating means 3 is also encoded and sent to the audio decoding means 5, which decodes the audio data and outputs an audio signal. . As in the case of the video decoding means 4, the decoding operation is performed based on control data from the control CPU 7, data such as a header in audio data is identified at the time of decoding, and an audio format based on a sampling frequency, the number of audio channels, etc. Is sent to the control CPU 7. The video signal and audio signal output from the video decoding means 4 and the audio decoding means 5 are sent to the synthesizing means 8.

On the other hand, the SI data output from the packet separating means 3 is sent to the EPG display processing means 6.
The EPG display processing means 6 processes the input SI data to form an EPG display screen and outputs a signal indicating the EPG display screen. As described above, the SI data includes information such as the channel name, the title of each program, the start / end time, the progress status, and the like. The EPG display processing means 6 performs processing based on these data, for example, FIG.
The display screen of the EPG as shown in FIG. Then, the EPG output from the EPG display processing means 6 is output.
The display screen signal is sent to the synthesizing means 8.

When the viewer operates the remote controller 10 to select a reception channel, a program, etc., and to instruct the display and non-display of the EPG, the contents of the operation are sent to the control CPU 7. Further, the control CPU 7 sends a reception channel,
Control data for instructing selection of a program or the like and display and non-display of the EPG are output.

As described above, the control CPU 7 sends the control data h for synthesizing the display signal together with the control data for reception and display to the synthesizing means 8 on the basis of the data of the above-mentioned video format and audio format. Sending out. When the viewer performs an operation for instructing the display of the EPG with the remote controller 10, control data r for instructing the display of the EPG is input to the synthesizing unit 8.

The synthesizing means 8 includes a video signal from the video decoding means 4, an audio signal from the audio decoding means 5, and E
The EPG display screen signals from the PG display processing means 6 are transmitted, and they are synthesized based on the control data h from the control CPU 7.
PG is displayed.

Normally, the video signal and the audio signal of the selected program are output to the display device 9 as a display signal as they are based on the control data h, and the display device 9
Provides program video and audio to viewers. At this time, when the viewer performs an operation of instructing the display of the EPG with the remote controller 10, the control data r for instructing the display of the EPG is input from the control CPU 7 to the synthesizing means 8, for example, as shown in FIG.
Can be displayed on the display device 9 in which the EPG display screen signal shown in FIG. The above operation is common to the operation of the conventional device (FIG. 18).

Next, the automatic non-display of the EPG, which is a feature of the digital broadcast receiver according to the first embodiment, will be described.

First, the automatic non-display when the EPG is displayed on the display device 9 will be described. EP
In order to display G, the synthesizing means 8 synthesizes the video and audio signals with the EPG display screen signal. In this case, the control CPU 7 detects a change in each format based on the format data indicating the video format and the audio format input from the video decoding unit 4 and the audio decoding unit 5. When either the video format or the audio format is switched and the format data changes, the control CPU 7
The control data f instructing non-display of G is output to the synthesizing means 8, and the display of the EPG is stopped.

FIG. 2 is a flowchart for explaining the processing operation for the above-mentioned automatic non-display. According to FIG. 2, control data f in control CPU 7 is output to EP
The operation until G is not displayed will be further described.

First, data indicating the video format and the audio format are input from the video decoding means 4 and the audio decoding means 5 to the control CPU 7 (step ST1).
The control CPU 7 compares the input data indicating the current video format and audio format with the data indicating the video and audio formats input immediately before, and determines whether or not the format has changed (step ST2). If it is determined that one or both of the video format and the audio format have changed, the control data f instructing non-display of the EPG is transmitted to the control CP.
The control data f is transmitted from U7 and received by the combining means 8 (step ST3).

Here, in digital broadcasting, for example, the aspect ratio of an image is switched from 16: 9 display to 4: 3 display, or the audio mode is switched from stereo to monaural, and so on. When both or both are switched, it can be determined that the program ends and the program switches to a commercial, or that the program switches from a commercial to a program and the program is restarted. Therefore, when the control CPU 7 detects that one or both of the video format and the audio format has been changed from the change in the data indicating the input video format and the audio format, the EPG non-display is instructed. Outputs control data f,
The EPG is not displayed at that timing (step ST
4).

In this case, the synthesizing means 8 performs the control C
When the control data f is sent from the PU 7, the synthesis of the display screen of the EPG is automatically stopped, and only the video signal and the audio signal from the video decoding means 4 and the audio decoding means 5 are output to the display device 9 as the display signal. Will be displayed. Thus, only the video and audio of the commercial or the selected program are output from the synthesizing means 8. Therefore, only the video and audio are provided to the viewer, and the display device 9 realizes automatic non-display of the EPG.

In the above, the processing operation for automatically hiding the EPG in the display device 9 displaying the EPG has been described. Even when the EPG is not displayed on the display device 9, the control CPU 7 detects that one or both of the video format and the audio format has changed, and performs control in the same procedure as the flowchart shown in FIG. By sending the data f to the synthesizing means 8, the display of the EPG can be automatically suppressed. For example, when the EPG is not displayed on the display device 9 and the viewer operates the remote controller 10 or the like to instruct the display of the EPG, the above-described EP is not canceled until the control data f is released.
The control data r for displaying G is invalidated, and the synthesizing means 8 automatically prohibits the synthesizing of the EPG display screen.

As described above, the user operates the remote controller 10 so that the viewer stops displaying the EPG screen.
It is possible to instruct the non-display of G. When the remote controller 10 is operated, control data r indicating non-display of the EPG from the control CPU 7 is input to the synthesizing means 8, and the synthesizing means 8 stops synthesizing the EPG display screen, and the video of the selected program is displayed. Only the display signal by sound is output from the display device 9. However, the automatic non-display operation of the EPG shown in FIG. 2 is executed independently of the operation of the remote controller 10, and the viewer sends information indicating the non-display of the EPG to the control CPU 7 by operating the remote controller 10. This is different from the display stop of the EPG screen display that is performed in the case of the above.

As described above, in the digital broadcast receiver according to the first embodiment, the control CPU 7 detects that the video format and the audio format have been changed based on the data indicating the input video format and the audio format. EPG when one or both of the audio format and the audio format change
Control data f for instructing non-display of the EPG is sent to the synthesizing means 8, and the synthesizing of the EPG display screen is automatically stopped.
Since G is configured to be hidden, the start of a commercial or the start of a program is determined by determining the start of a commercial break or the start of a program where the format of video or audio in digital broadcasting changes. At this time, the display of the EPG can be automatically stopped and not displayed.

Embodiment 2 In the digital broadcast receiver according to the first embodiment, control CPU 7 controls when one or both of the video format and the audio format change based on the data indicating the input video format and the audio format. The data f is output to automatically hide the EPG display screen. In the second embodiment, the control CP
The EPG screen is automatically hidden by using SEC (sequence end code) detection data of the data sent to U.

FIG. 3 is a block diagram showing an example of the configuration of a digital broadcast receiver according to Embodiment 2 of the present invention. In the figure, 1 to 6, 8 to 10 are the first embodiment.
Is the same as that shown in FIG. 7b is the control CP
U, which is a multiplex stream (TS) which is a digital broadcast signal, like the control CPU 7 in the first embodiment.
And the display operation of the selected program is controlled.

Next, the operation of the above-described digital broadcast receiver will be described. A signal received by a receiving antenna (not shown) is input to the tuner 1 and processed.
Subsequent operations from the tuner 1 to the video decoding unit 4, the audio decoding unit 5, and the EPG display processing unit 6 and the operation of the remote controller 10 are the same as the operations in the first embodiment. Omitted.

The control CPU 7b sends control data h for synthesizing the display signal to the synthesizing means 8 based on the data of the above-mentioned video format and audio format, together with the control data for reception and display. . When the viewer performs an operation of instructing the display of the EPG with the remote controller 10, control data r for instructing the display of the EPG is input from the control CPU 7 b to the synthesizing unit 8.

The synthesizing means 8 includes a video signal from the video decoding means 4, an audio signal from the audio decoding means 5, and E
An EPG display screen signal is sent from the PG display processing means 6, and these are combined based on the control data h from the control CPU 7b, and the EPG is displayed on the display device 9 by the combined output.

Normally, the video signal and the audio signal of the selected program are output directly to the display device 9 as a display signal based on the control data h.
Provides program video and audio to viewers. At this time, when the viewer performs an operation of instructing the display of the EPG using the remote controller 10, control data r for instructing the display of the EPG is input from the control CPU 7b to the synthesizing unit 8, and for example, FIG.
9 can be displayed on the display device 9 in which an EPG display screen signal is synthesized with a video signal. The above operation is common to the operation in the first embodiment.

Next, the automatic non-display of the EPG, which is a feature of the digital broadcast receiver according to the second embodiment, will be described.

First, automatic non-display while the EPG is displayed on the display device 9 will be described. EP
In order to display G, the synthesizing means 8 synthesizes the video and audio signals with the EPG display screen signal. In this case, the SEC detection data is input from the video decoding unit 4 to the control CPU 7b to notify that a series of image sequences has been completed. Therefore, when the SEC detection data is input, control data s instructing non-display of the EPG is output from the control CPU 7b to the synthesizing means 8, and the display of the EPG is stopped.

FIG. 4 is a flowchart for explaining the processing operation for the above-mentioned automatic non-display. According to FIG. 4, control data s in control CPU 7b is output and E
The operation until the PG is not displayed will be further described. In the control CPU 7b, the video decoding means 4 starts from the initial state.
Waiting for the input of the SEC detection data to be transmitted, and when the SEC detection data is input in step ST11, the process proceeds to step ST12, where the control data s is transmitted.

Here, in digital broadcasting, SEC (sequence end code) indicating the end of a sequence of video data is used when a series of image sequences, such as a program and a commercial, ends, that is, when switching to a commercial at a break between programs. Also, it is considered that the SEC is sent when the program or the commercial is switched and the SEC is not sent while the program or the commercial continues. When such a SEC is detected by the video decoding means 4, it can be determined that the program ends and the program is switched to a commercial, or that the program is switched from a commercial to a program and the program is restarted. . Therefore, when the SEC detection data is input, the control CPU 7b outputs control data s for instructing non-display of the EPG, and non-displays the EPG at that timing (step ST13).

In this case, the synthesizing means 8 performs the control C
When the control data s is sent from the PU 7b, the synthesis of the display screen of the EPG is automatically stopped, and only the video signal and the audio signal from the video decoding unit 4 and the audio decoding unit 5 are output to the display device 9 as the display signal. Will be displayed. Thus, only the video and audio of the commercial or the selected program are output from the synthesizing means 8. Therefore, only the video and audio are provided to the viewer,
Automatic non-display of the EPG is realized on the display device 9.

The processing operation for automatically hiding the EPG in the display device 9 displaying the EPG has been described above. Even when the EPG is not displayed on the display device 9, the control CPU 7b detects the SEC detection data and sends the control data s to the synthesizing means 8 in the same procedure as the flowchart shown in FIG. The display of the EPG can be suppressed. For example, when the display device 9
Even if the viewer operates the remote controller 10 or the like to display the EPG when the PG is not displayed, the control data r for displaying the EPG will be kept until the control data s is released. Is invalidated, and the synthesizing means 8 automatically prohibits the synthesizing of the EPG display screen.

As described above, in the digital broadcast receiver according to the second embodiment, the control CPU 7b sends the control data s to the synthesizing means 8 based on the SEC detection data of the input video data, and displays the EPG. Since the composition of the screen is automatically stopped and the EPG is not displayed, the start of the commercial or the start of the program after the SEC indicating the end of the sequence of the program video in the digital broadcast is detected. When the start is determined, the display of the EPG can be automatically stopped at the start of the commercial or the start of the program, and the display can be stopped.

Embodiment 3 The digital broadcast receiver according to the second embodiment is configured to output control data s indicating non-display of the EPG by inputting SEC detection data to the control CPU 7b, and to automatically hide the EPG display screen. I was In the third embodiment, the control CPU measures the SEC detection interval based on the SEC input from the video decoding unit 4, and automatically hides the EPG display screen when the SEC detection interval is longer than a predetermined time. It is configured as follows.

The digital broadcast receiver according to the third embodiment can be configured similarly to the case of the second embodiment shown in FIG. Therefore, here, only the automatic non-display of the EPG, which is a feature of the digital broadcast receiver of the third embodiment, will be described.

FIG. 5 is a flowchart for explaining the processing operation for automatic non-display. With reference to FIG. 5, an operation from outputting the control data s2 from the control CPU 7b to hiding the EPG will be described.

To display the EPG, the synthesizing means 8 synthesizes the video and audio signals with the EPG display screen signal. In that case, the control CPU 7b resets the timer set time t to 0 in the initial state (step ST2).
1). Then, the time t until the SEC detection data is input from the video decoding means 4 is counted (step ST).
2). Thereafter, when the input of the SEC detection data is confirmed in step ST23, the process proceeds to step ST24.

In step ST24, it is determined whether or not the time t from the timer set time to the input of the SEC detection data exceeds a predetermined time Tx. In
Proceeding to step ST25, the control data s2 is transmitted. On the other hand, if the time t is shorter than the fixed time Tx, the process returns to step ST21, and resets the timer set time (t =
0), and the time t until the SEC detection data transmitted from the video decoding means 4 is input again is counted.

Here, in digital broadcasting, the SEC (sequence end code) indicating the end of a sequence of video data is used when a series of image sequences such as a program and a commercial is completed, that is, when the program is switched to a commercial at a program break. Also, it is considered that the SEC is sent when the program or the commercial is switched and the SEC is not sent while the program or the commercial continues. During a certain time during such a program or commercial, S
When the EC detection data is not input and the SEC is detected by the video decoding means 4 next, the program is terminated and switched to a commercial, or the program is switched from a commercial to a program and the program is started again. Can be determined to be a break.

Therefore, if the control CPU 7b does not input the SEC detection data for a predetermined time and detects SEC after an interval of a predetermined time or more, the EPG
The control data s2 instructing non-display is output, and the EPG is non-displayed at that timing (step ST26).
If the fixed time Tx is set to a relatively long time until the end of the program, the control data s2 can be sent only when the program is switched to a commercial.

As described above, SEC is not input for a fixed time,
If SEC is detected after an interval of a predetermined time or more, the synthesizing means 8 sets the control data s from the control CPU 7b.
2, the synthesis of the display screen of the EPG is automatically stopped, and only the video signal and the audio signal from the video decoding means 4 and the audio decoding means 5 are output as display signals to the display device 9 for display. Will be. Thus, from the synthesizing means 8,
Only the video and audio of the commercial or the selected program are output. Therefore, only the video and audio are provided to the viewer, and the EPG is displayed on the display device 9.
Is automatically hidden.

In the above, the processing operation regarding the automatic non-display of the EPG in the display device 9 displaying the EPG has been described. Even when the EPG is not displayed on the display device 9, the control CPU 7b detects the SEC detection data and sends the control data s2 to the synthesizing means 8 in the same procedure as the flowchart shown in FIG. The display of the EPG can be suppressed. For example, when the display device 9 does not display the EPG,
Even if the user gives an instruction to display an EPG, until the control data s2 is released, the control data r for displaying the EPG is invalidated, and the synthesizing means 8 synthesizes the EPG display screen. Prohibit automatically.

As described above, in the digital broadcast receiver according to the third embodiment, the control CPU 7b does not detect SEC for a certain period of time based on the SEC detection data of the input video data, After SEC
Is detected, the control data s2 is sent to the synthesizing means 8, and the synthesizing of the display screen of the EPG is automatically stopped.
Is not displayed, the SEC indicating the end of the program video sequence in digital broadcasting
The start of the commercial or the start of the program after the is detected is determined, and when the start of the commercial or the start of the program, the display of the EPG can be automatically stopped and the display of the EPG can be stopped. In the third embodiment, since the control data s2 is transmitted when SEC is detected after an interval of a predetermined time or more, the setting of the fixed time Tx for determining the time until SEC is detected is changed. This makes it possible to automatically hide the EPG only when the program is switched to a commercial break.

Embodiment 4 The digital broadcast receivers of the second and third embodiments are configured to automatically hide the EPG screen by using the SEC detection data among the data sent to the control CPU. In the fourth embodiment, a motion detecting means for detecting a motion level,
Alternatively, the digital broadcast receiver is configured as a digital broadcast receiver including at least one of audio detection means for detecting an audio level based on an audio signal in a multiplex stream, and automatically hides an EPG screen.

FIG. 6 is a block diagram showing an example of the configuration of a digital broadcast receiver according to Embodiment 4 of the present invention. In the figure, 1 to 6, 8 to 10 are the first embodiment.
3 are the same as those shown in FIGS. Reference numeral 7c denotes a control CPU, 11 denotes a motion level detecting means for detecting whether there is no motion of the video, and 12 denotes an audio level detecting means for detecting whether or not the audio is silent.
In the PU 7c, the control CPU in the first to third embodiments is used.
Like 7 and 7b, control data is determined based on data from each block and the like, a multiplexed stream as a digital broadcast signal is received, and the display operation of the selected program is controlled.

Next, the operation of the above-described digital broadcast receiver will be described. A signal received by a receiving antenna (not shown) is input to the tuner 1 and processed.
Subsequent operations from the tuner 1 to the video decoding unit 4, the audio decoding unit 5, and the EPG display processing unit 6 and the operation in the remote controller 10 are the same as the operations in the first embodiment. Omitted.

FIG. 7 is a block diagram showing an example of the configuration of the motion level detecting means 11. In FIG. 7, 13 is a motion amount detecting means, 14 is a level determining means, and 15 is a comparing means. The motion level detecting means 11 detects whether there is no video motion. Therefore, a motion vector MV (Motion Vector) obtained by decoding by the video decoding unit 4 is input to the motion level detecting unit 11. The motion vector MV indicates the amount of motion for each macroblock (hereinafter, referred to as MB) in one frame in an inter frame of video data. If the motion vector MV becomes large and the video has no motion and is almost a still image, the motion vector MV of each MB has zero or a value close to zero.

Therefore, the motion amount detecting means 13 detects the motion amount of each MB in the frame based on the motion vector MV, and the level judging means 14 determines whether the motion amount is zero or an MB having a value close to zero. If a determination is made and the ratio of the number of such MBs is obtained by the comparing means 15, the motion level can be detected.

Next, the operation of the motion level detecting means 11 will be further described. Although not shown, control data from the control CPU 7c is sent to the motion level detecting means 11, and the operation of each of the blocks 13 to 15 is controlled by the control data.

The motion vector MV of each MB in the inter frame in the video data input to the motion level detecting means 11 is sent to the motion amount detecting means 13. In the motion amount detecting means 13, the motion vector M of each input MB is obtained.
The magnitude of V is obtained, and the magnitude of the motion vector MV is sent to the level determination means 14 as the amount of motion. The level determination means 14 determines the level of the motion amount from the input motion amount. For example, a predetermined value α indicating a motion amount of a value close to zero that can determine that there is no motion is set. The number of MBs having a predetermined value α or less is counted, the total number Ms of MBs in which the amount of motion in the inter-frame is equal to or less than the predetermined value α is obtained, and this Ms is output as a motion level in frame units.

In the comparing means 15, the level determining means 14
Is compared with a predetermined value β. If Ms is greater than a predetermined value, it is determined that there is no motion in the video, and if Ms is less than or equal to a predetermined value, it is determined that there is motion, and the resulting motion of the video The data indicating the information is output to the control CPU 7c. Here, the predetermined value β is the MB within one frame.
The number may be determined by the number (which can be determined from the image size), and may be set to, for example, a value of 95% of the total number of MBs.

FIG. 8 is a block diagram showing an example of the configuration of the audio level detecting means 12. In FIG. 8, reference numeral 16 denotes a level detecting means, and 17 denotes a comparing means. The audio level detecting means 12 detects the level of the audio signal Da decoded by the audio decoding means 5, for example, and determines whether the audio signal Da is silent.

Next, the operation of the audio level detecting means 12 will be further described. Although not shown, control data from the control CPU 7c is sent to the audio level detecting means 12, and the operations of the blocks 16 and 17 are controlled by the control data.

The audio signal Da input to the audio level detecting means 12 is sent to the level detecting means 16. The level detecting means 16 detects, for example, the average value La of the audio signal level within the audio frame unit, and sends it to the comparing means 17. The comparing means 17 determines that there is no sound if the average value La of the audio signal level in the audio frame unit is smaller than a predetermined level βa, and determines that there is audio if the average value La is equal to or higher than the predetermined level βa, and determines the audio level information. The output data is output to the control CPU 7c. Here, the predetermined value βa is set in advance to a level value at which the audio signal Da can be determined to be silent.

The control CPU 7c sends out control data h for synthesizing the display signal to the synthesizing means 8 based on the data of the above-mentioned video format and audio format together with the control data for reception and display.
When the viewer performs an operation for instructing the display of the EPG with the remote controller 10, control data r for instructing the display of the EPG is input from the control CPU 7 c to the synthesizing unit 8.

The synthesizing means 8 includes a video signal from the video decoding means 4, an audio signal from the audio decoding means 5, and E
The EPG display screen signals from the PG display processing means 6 are sent, and they are combined based on the control data h from the control CPU 7c, and the EPG is displayed on the display device 9 by the combined output.

Normally, the video signal and the audio signal of the selected program are directly output as display signals to the display device 9 based on the control data h.
Provides program video and audio to viewers. At this time, when the viewer performs an operation of instructing the display of the EPG with the remote controller 10, the control data r for instructing the display of the EPG is input from the control CPU 7c to the synthesizing means 8, and for example, as shown in FIG.
9 can be displayed on the display device 9 in which an EPG display screen signal is synthesized with a video signal. The above operation is common to the operation in the first embodiment.

Next, the automatic non-display of the EPG, which is a feature of the digital broadcast receiver according to the fourth embodiment, will be described.

First, automatic non-display while the EPG is displayed on the display device 9 will be described. EP
In order to display G, the synthesizing means 8 synthesizes the video and audio signals with the EPG display screen signal. In that case, data indicating the motion information of the video from the motion level detecting means 11 and data indicating the information of the audio level from the audio level detecting means 12 are input to the control CPU 7c. And
The control CPU 7c synthesizes the control data m for instructing non-display of the EPG based on those data, when either one of the video and the silent video or both of them continue for a certain period of time. Output to the means 8 and EP
The display of G is stopped.

FIG. 9 is a flowchart for explaining the processing operation for automatic non-display described above. According to FIG. 9, control data m in control CPU 7c is output and E
The operation until the PG is not displayed will be further described.

The control CPU 7c resets the timer set time t to 0 in the initial state (step ST31). Whether the data indicating the motion information of the video input from the motion level detecting means 11 indicates that the video does not move,
Alternatively, if the data indicating the audio level information input from the audio level detecting means 12 indicates silence or both (step ST32), step ST33.
And the timer starts counting the time t.

Next, in step ST34, the time t of the timer does not exceed a predetermined time Tx1, and
If the subsequently input data indicates no motion or no sound of the video, the time t is counted as it is, and when the time t exceeds a predetermined time Tx1, the process proceeds to step ST35 to hide the EPG. Is transmitted. On the other hand, if the video moves or data indicating sound is input while the time t does not exceed the predetermined time Tx1, the timer set time t is reset to the initial state (t = 0). Return to

Here, in the digital broadcasting, the video does not move during the program, and an almost still image does not continue for a certain period of time, or a silent state does not last for a certain period of time. Therefore, in the control CPU 7c, when data indicating that there is no motion in the video or data indicating silence is continuously input for a certain period of time, it can be determined that the case switches to a commercial at a program break or the case switches to a program. . Therefore, control data m for instructing non-display of the EPG is output at such a timing,
The EPG is not displayed at that timing (step ST
36).

In this way, if either or both of the video has no motion or no sound has continued for a certain period of time, the synthesizing means 8 receives the control data m from the control CPU 7c. , The synthesis of the display screen of the EPG is automatically stopped, and only the video signal and the audio signal from the video decoding means 4 and the audio decoding means 5 are used as display signals as the display device 9.
Output to and display. Thus, the combining means 8
Output only the video and audio of the commercial or the selected program. Therefore, only the video and audio are provided to the viewer, and the display device 9 realizes automatic non-display of the EPG.

In the above, the processing operation regarding the automatic non-display of the EPG in the display device 9 displaying the EPG has been described. Even when the display device 9 does not display the EPG, the control CPU 7c detects whether data indicating whether there is no motion of the video or no sound continues for a certain period of time, and performs the same procedure as the flowchart shown in FIG. By sending the control data m to the synthesizing means 8, the EPG is automatically
Can be suppressed. For example, if the EPG is not displayed on the display device 9 and the viewer operates the remote controller 10 or the like to instruct the display of the EPG, the EPG is displayed until the control data m is released. The control data r for performing the
Automatically prohibit composition of the display screen.

As described above, in the digital broadcast receiver according to the fourth embodiment, the control CPU 7c uses the data indicating the motion information of the video from the motion level detecting means 11 or the audio level from the audio level detecting means 12 in the control CPU 7c. Based on the data indicating the information, if either one of the images has no motion or no sound or both of them continue for a certain period of time, the control data m is sent to the synthesizing means 8 and the EPG display screen is displayed. Since the composition is automatically stopped and the EPG is not displayed, when the video in the digital broadcast has no motion or is in a silent state for a certain period of time, the start of the commercial, Alternatively, when it is determined that the program has started, the display of the EPG can be automatically stopped at the start of the commercial and the start of the program, and the display can be stopped.

The motion level detecting means 11 according to the fourth embodiment is configured as shown in FIG. 7 and detects based on the number Ms of MBs in which the amount of motion in a frame is equal to or less than a predetermined value α. explained. However, other methods may be used as long as it is possible to detect whether there is motion in the video based on the video data. For example, a method of determining the distribution of the number of MBs having each amount of motion in a frame from the amount of motion and judging from the distribution state, or each MB in an inter-frame
May be determined by comparing the sum of the motion amounts of the above and the value with a predetermined value to determine whether or not there is any motion. In either case, the same effect as in the fourth embodiment can be obtained.

The audio level detecting means 12 according to the fourth embodiment is configured as shown in FIG. 8, and has been described as detecting the audio level on the basis of the average value La of the audio signal level within the audio frame unit. However, another method may be used as long as it can detect whether there is sound or no sound based on the audio data. For example, an effect similar to that of the fourth embodiment can be obtained even with a configuration in which an audio signal level during a period corresponding to a video frame is detected and whether there is sound or no sound is detected from the distribution of the level.

Embodiment 5 FIG. In the digital broadcast receiver according to the fourth embodiment, control data m is output when either one of the video has no motion and the video is silent or both statuses continue for a certain period of time, and the EPG display is performed. The screen was configured to be automatically hidden. In the fifth embodiment, after one or both of the states of no motion and no sound in the video continue for a certain period of time, either or both of the motion and the voice of the video resume. At this time, the EPG display screen is automatically hidden.

The digital broadcast receiver according to the fifth embodiment can be configured similarly to the case of the fourth embodiment shown in FIG. Therefore, here, only the automatic non-display of the EPG, which is a feature of the digital broadcast receiver of the fifth embodiment, will be described.

FIG. 10 is a flowchart for explaining the processing operation for automatic non-display. According to FIG.
An operation from outputting the control data m2 from the control CPU 7c to hiding the EPG will be described. Processing steps that overlap with those in FIG. 9 are denoted by the same reference numerals.

To display the EPG, the synthesizing means 8 synthesizes the video and audio signals with the EPG display screen signal. In this case, the control CPU 7c resets the timer set time t to 0 in the initial state (step ST3).
1). Then, the data indicating the motion information of the video input from the motion level detecting means 11 indicates that there is no motion in the video, or the data indicating the audio level information input from the audio level detecting means 12 indicates that there is no sound. If both are present or both (step ST32), the process proceeds to step ST33, and the timer starts counting time t.

Next, at step ST37, the time t of the timer does not exceed the predetermined time Tx2,
If the subsequently input data indicates no motion or no sound in the video, the time t is counted as it is. After the time t exceeds a predetermined time Tx2, the data indicating the motion information of the video input from the motion level detecting means 11 indicates the motion of the video or is input from the audio level detecting means 12. It waits for data indicating the audio level information to indicate that it is a sound or for inputting data indicating both (step ST38). Then, when it is determined that the movement of the video or the sound has been started, the process proceeds to step ST35, where control data m2 for instructing non-display of the EPG is transmitted. On the other hand, if the video moves or data indicating sound is input while the time t does not exceed the predetermined time Tx2, the timer set time t is reset to the initial state (t = 0). Return to

Here, in digital broadcasting, the video does not move during the program, and an almost still image does not continue for a certain period of time, or a silent state does not last for a certain period of time. Therefore, in the control CPU 7c, when either or both of the video motion and the audio start after the data indicating that the video has no motion or the data indicating the silence have been input continuously for a certain period of time, , Or the program is switched to the program, and it can be determined that the program has started.
Therefore, the control data m2 for instructing the non-display of the EPG is output at such a timing, and the EPG is output at that timing.
Is not displayed (step ST36).

In this way, when either or both of the video and the sound start after the video has no motion or no sound or both have continued for a certain period of time. In the synthesizing means 8, the control CP
Upon receiving the control data m2 from U7c, the synthesis of the display screen of the EPG is automatically stopped, and only the video and audio signals from the video decoding means 4 and the audio decoding means 5 are output to the display device 9 as display signals. And display it. Thus, only the video and audio of the commercial or the selected program are output from the synthesizing means 8. Therefore, only the video and audio are provided to the viewer,
Automatic non-display of the EPG is realized on the display device 9.

In the above, the processing operation regarding the automatic non-display of the EPG in the display device 9 displaying the EPG has been described. Even when the EPG is not displayed on the display device 9, the control CPU 7c detects whether data indicating whether there is no motion of the video or no sound continues for a certain period of time, and performs the same procedure as the flowchart shown in FIG. so,
By sending the control data m2 to the synthesizing means 8, E
PG display can be suppressed. For example, the display device 9
When G is not displayed, even if the viewer operates the remote controller 10 or the like to instruct the display of the EPG, the control data r for displaying the EPG until the control data m2 is released. Is invalidated, and the synthesizing means 8 automatically prohibits the synthesizing of the EPG display screen.

As described above, in the digital broadcast receiver according to the fifth embodiment, in the control CPU 7c, the data indicating the motion information of the video from the motion level detecting means 11 and the information of the audio level from the audio level detecting means 12 Based on the data indicating that the video is motionless or silent and / or both after a certain period of time,
Since the control data m2 is sent to the synthesizing means 8 when the video or audio starts, the composition of the EPG display screen is automatically stopped and the EPG is not displayed.
When there is no motion or no sound in the video in the digital broadcast for a certain period of time, it is determined that a commercial or a program has started, and at the start of the commercial or the program, the EPG The display can be automatically stopped and hidden.

Embodiment 6 FIG. Each of the digital broadcast receivers according to the first to fifth embodiments instructs non-display of the EPG based on a video signal and / or an audio signal in a multiplexed stream. In the sixth embodiment, the control CP
In U, when the subtitle signal is detected, EP
The digital broadcast receiver is configured so as to instruct the non-display of G and not combine the EPG display screen signal, and the EPG screen is automatically hidden.

FIG. 11 is a block diagram showing an example of the configuration of a digital broadcast receiver according to Embodiment 6 of the present invention. In the drawing, reference numerals 1 to 3, 5, 6, 9 to 10 are the same as those shown in FIGS. 4b is a video decoding means for decoding video data, 30 is a subtitle information processing means, 7f is a control CPU, and 8b is a display screen of a video signal and subtitle information, an audio signal and an EPG based on control data from the control CPU 7f. Is a synthesizing means for synthesizing. In the control CPU 7f, the first to third embodiments are used.
As in the control CPUs 7 and 7b, control data is determined based on data from each block and the like, a multiplexed stream as a digital broadcast signal is received, and a display operation of a selected program is controlled.

Next, the operation of the above-described digital broadcast receiver will be described. A signal received by a receiving antenna (not shown) is input to the tuner 1 and processed.
Subsequent operations from the tuner 1 to the packet separating unit 3, operations of the audio decoding unit 5 and the EPG display processing unit 6, and operations of the remote controller 10 are described in the first to third embodiments.
3, the detailed description thereof is omitted.

In the packet separating means 3, the input TS
Out of the packets of the selected program, output the video data and audio data of the program, and separate and extract the data indicating the program sequence information (Service Information). 4
b, output to the audio decoding means 5 and the EPG display processing means 6. If there is a packet related to subtitle information in the TS, the packet is separated and extracted, and output to the subtitle information processing means 30.

Here, in the SI, data indicating information such as the channel name of the service, the title of each program, the start / end time, the continuation time, the contents and the progress status are transmitted. By doing so, a display screen of an electronic program guide (EPG) which is a program list can be created and displayed on the screen. The packet separation means 3 extracts a transmission control signal (PSI), time information, and the like transmitted by the TS, and sends them to the control CPU 7f as control information, which controls packet separation. Control data will be sent.

Although the video decoding means 4b decodes video data, the decoding operation is performed based on control data from the control CPU 7f, and outputs a video signal.
Also, at the time of decoding, a sequence header and a sequence end code (Sequence End Code,
The end code of the sequence, hereafter referred to as SEC. ) To identify the image format, image format, aspect ratio, scanning format and frame frequency, SEC
Is sent to the control CPU 7f. Further, when data relating to subtitle information is transmitted in the video data, the header is identified at the time of decoding, the subtitle information is extracted, and output to the subtitle information processing means 30 in the same manner as described above.

Here, the subtitle information includes subtitles directly related to the contents of the video of the program, breaking subtitles, and text information. The subtitle information is transmitted to the TS independently of packets such as video and audio. It may be sent in a user data area in a picture layer in encoded data. Therefore, when the packet is sent as a caption information packet in the TS, the data is extracted by the packet separating means 3 and
When the video data is transmitted in the user data area in the picture layer in the video encoded data, the video decoding means 4b identifies the header at the time of decoding, extracts the subtitle information, and sends it to the subtitle information processing means 30. .

Then, the subtitle information processing means 30 processes the data indicating the input subtitle information, and combines the processed subtitles with the synthesizing means 8b in order to display the processed subtitles superimposed on the video signal output from the video decoding means 4b. Send to In the subtitle information processing means 30, a series of processing operations are executed based on control data from the control CPU 7f. At this time, data indicating whether or not subtitle information is transmitted, which will be described later,
It is sent to the control CPU 7f.

As described above, the control CPU 7f transmits the control data h for synthesizing the display signal together with the control data for reception and display to the synthesizing means 8b based on the data of the video format and the audio format. Sending out. When the viewer performs an operation of instructing the display of the EPG with the remote controller 10, control data r for instructing the display of the EPG is input to the synthesizing means 8b.

The synthesizing means 8b includes the video decoding means 4b
And the audio signal from the audio decoding unit 5, the subtitle data from the subtitle information processing unit 30, and the signal of the EPG display screen from the EPG display processing unit 6,
These are combined based on the control data h from the control CPU 7f, and the EPG is displayed on the display device 9 by the combined output.

Normally, when caption data is supplied from the caption information processing means 30, the caption is superimposed on the video signal, and the video signal and the audio signal on which the caption is superimposed are based on the control data h. Is output as it is to the display device 9 as a display signal.
Provides viewers with program video, audio and subtitles. However, when the caption data is not output from the caption information processing means 30, the video signal and the audio signal are supplied to the display device 9 as the display signal without changing the video signal. At this time, when the viewer performs an operation of instructing the display of the EPG by the remote controller 10, control data r for instructing the display of the EPG is input from the control CPU 7f to the synthesizing means 8b, and the EPG display screen as shown in FIG. A screen in which the signal is combined with the video signal can be displayed on the display device 9. The above operation is common to the operation of the conventional device (FIG. 18).

Next, the automatic non-display of the EPG, which is a feature of the digital broadcast receiver according to the sixth embodiment, will be described.

First, automatic non-display while the EPG is displayed on the display device 9 will be described. EP
To display G, an EPG display screen signal is combined with the video and audio signals in the combining means 8b. In that case,
The control CPU 7f detects the timing at which subtitle information is transmitted based on subtitle information detection data indicating whether or not subtitle information sent from the subtitle information processing means 30 is being transmitted. When subtitle information is transmitted, the control CPU 7
The control data j for instructing non-display of the EPG is output from f to the synthesizing means 8b, and the display of the EPG is stopped.

FIG. 12 is a flowchart for explaining the processing operation for automatic non-display described above. With reference to FIG. 12, the operation of the control CPU 7f until the control data j is output and the EPG is not displayed will be further described.

In step ST41, data indicating whether or not subtitle information is transmitted from the subtitle information processing means 30 to the control CPU 7f. When the control CPU 7f detects that subtitle information has been transmitted based on the data (step ST42), the process proceeds to step ST43 to output control data j for instructing non-display of the EPG.

If it is determined in step ST42 that subtitle information has not been transmitted, the process returns to step ST41, and waits for the next input of data indicating whether or not subtitle information has been transmitted.

[0129] Here, the subtitle information in digital broadcasting includes not only subtitles directly related to the content of video but also flashing subtitles and character information. Therefore, when there is no subtitle information and the next subtitle information is transmitted, the program is switched to the next video, such as when the program ends and switches to a commercial, or when the program switches from a commercial to a program and the program starts again. It can be determined that this is the case or the case of transmitting an emergency bulletin. Therefore, the control C
When the PU 7f detects that the subtitle information transmitted from the subtitle information processing means 30 is transmitted based on the data indicating whether or not the subtitle information is transmitted, the PU 7f outputs control data j instructing non-display of the EPG. Then, the EPG is not displayed at that timing (step ST44).

In this case, when the control data j is sent from the control CPU 7f, the synthesizing means 8b automatically stops synthesizing the display screen of the EPG, and outputs the video decoding means 4b, the subtitle information processing means 30, and the audio data. Only the video signal and the audio signal from the decoding means 5 are output as display signals to the display device 9 for display. Thus, only the video and subtitles and audio of the commercial or the selected program are output from the synthesizing means 8b. Therefore, only the video and audio are provided to the viewer, and the display device 9 realizes automatic non-display of the EPG.

In the above, the processing operation regarding the automatic non-display of the EPG in the display device 9 displaying the EPG has been described. Even when the EPG is not displayed on the display device 9, the control CPU 7f detects that subtitle information has been transmitted, and sends the control data j to the synthesizing means 8b in the same procedure as the flowchart shown in FIG. Thus, the display of the EPG can be automatically suppressed. For example, when the display device 9 does not display the EPG, the EPG is displayed until the control data j is released even if the viewer performs an operation of instructing the display of the EPG with the remote controller 10 or the like. Is invalidated, and the synthesizing means 8b automatically prohibits the synthesizing of the EPG display screen.

As described above, in the digital broadcast receiver according to the sixth embodiment, the control CPU 7f uses the subtitle information transmitted from the subtitle information processing means 30 based on the data indicating whether or not the subtitle information is transmitted. Is detected, the control data j is sent to the synthesizing means 8b, and the synthesizing of the EPG display screen is automatically stopped.
Is hidden, so that the start of a commercial or the start of a break in a program in which subtitle information in digital broadcasting is transmitted, and the start of a commercial or the start of a program are determined. Can be automatically stopped and hidden.

Embodiment 7 FIG. In the digital broadcast receiver according to the sixth embodiment, control CPU 7f outputs control data j when subtitle display is performed based on subtitle information input together with video, and automatically hides the EPG display screen. It was configured to be. In the seventh embodiment, the EPG screen is automatically hidden by knowing the program break time in the data sent to the control CPU.

FIG. 13 is a block diagram showing an example of the configuration of a digital broadcast receiver according to Embodiment 7 of the present invention. In the figure, reference numerals 1 to 6 and 8 to 10 are the same as those of the first embodiment shown in FIG. 7d is a control CPU, 20 is a program break time detecting means for detecting a program break time, and the control CPU 7d determines control data based on data from each block and the like as in the control CPU 7 in the first embodiment. Multiplex stream, which is a digital broadcast signal, and controls the display operation of the selected program.

Next, the operation of the above-described digital broadcast receiver will be described. A signal received by a receiving antenna (not shown) is input to the tuner 1 and processed.
Subsequent operations from the tuner 1 to the video decoding unit 4, the audio decoding unit 5, and the EPG display processing unit 6 and the operation of the remote controller 10 are the same as the operations in the first embodiment. Omitted.

The program break time detecting means 20 has the program sequence information (Service
Information: SI data) is input. here,
The SI data includes, as information relating to the program, information such as the title of the program, the start / end time, the progress status, and the like, and is processed using the SI data to display an electronic program guide (EPG) as a program list. A screen can be created and displayed on the screen, and the break time of the selected program can be detected.

That is, control data indicating the program selected from the control CPU 7 d is sent to the program break time detecting means 20, and the SI data input from the packet separating means 3 indicates the selection data indicated by the control data. By extracting information such as the start / end time of the program, the progress status, and the information of the current time, the time at which the program breaks, such as the first half scheduled time and the scheduled program end time, based on the current state and the program start / end time, for example, Tc can be detected. The data indicating the detected break time Tc is the control CP
Output to U7d.

As described above, the control CPU 7d transmits the control data h for synthesizing the display signal together with the control data for reception and display to the synthesizing means 8 based on the data of the above-mentioned video format and audio format. Sending out. When the viewer performs an operation for instructing the display of the EPG with the remote controller 10, control data r for instructing the display of the EPG is input to the synthesizing unit 8.

Also, the synthesizing means 8 includes a video signal from the video decoding means 4 and an audio signal from the audio decoding means 5,
The EPG display screen signals from the PG display processing means 6 are sent, and they are combined based on the control data h from the control CPU 7d, and the EPG is displayed on the display device 9 by the combined output.

Normally, the video signal and the audio signal of the selected program are output directly to the display device 9 as a display signal based on the control data h.
Provides program video and audio to viewers. At this time, when the viewer performs an operation of instructing the display of the EPG with the remote controller 10, control data r for instructing the display of the EPG is input from the control CPU 7d to the synthesizing means 8, and for example, FIG.
9 can be displayed on the display device 9 in which the EPG display screen signal is synthesized with the video signal.

Next, the automatic non-display of the EPG, which is a feature of the digital broadcast receiver according to the seventh embodiment, will be described.

First, automatic non-display while the EPG is displayed on the display device 9 will be described. EP
In order to display G, the synthesizing means 8 synthesizes the video and audio signals with the EPG display screen signal. In that case, the control CPU 7d uses the video decoding means 4 and the audio decoding means 5
The change of each format is detected based on the format data indicating the video format and the audio format input from the PC and the program break time Tc from the program break time detecting means 20. When either the video format or the audio format is switched around the program break time Tc and the format data changes, control data g for instructing non-display of the EPG is output from the control CPU 7d to the synthesizing means 8. , EPG display is stopped.

FIG. 14 is a flowchart for explaining the processing operation for automatic non-display described above. With reference to FIG. 14, the operation from output of control data g by control CPU 7d to non-display of the EPG will be further described.

First, data indicating a program break time Tc is input from the program break time detecting means 20 to the control CPU 7d (step ST51). Next, data indicating the video format and the audio format is input from the video decoding unit 4 and the audio decoding unit 5 to the control CPU 7d (step ST52). In the control CPU 7d, input of data indicating the video format and the audio format from the video decoding unit 4 and the audio decoding unit 5
It is determined whether the time is before or after a predetermined time of the program break time Tc (step ST53). If the time is before or after the program break time Tc, the input data indicating the current video format and audio format is compared with the data indicating the video and audio formats input immediately before the data, and It is determined whether there is a change (step ST54). If it is determined that one or both of the video format and the audio format have changed, control data g instructing non-display of the EPG is transmitted from control CPU 7d, and control means g receives control data g (step ST55). .

In step ST53, if the video format and the audio format are input but not before and after the program break time Tc, the next video format and audio format are changed without detecting a format change. Wait for the input of the indicated data.

In digital broadcasting, before and after the program break time detected by the program break time detecting means 20,
For example, when the aspect ratio of an image is changed from 16: 9 display to 4: 3
When one or both of the video and / or audio formats switch, such as switching to display or switching the audio mode from stereo to monaural, the program ends and switches to commercial, or switches from commercial to program. , It can be determined that the program is a break, such as when the program is started again. Therefore, when it is detected that one or both of the video format and the audio format input before and after the break time of the program detected by the program break time detecting means 20 are changed, the control data for instructing the non-display of the EPG is detected. g is output, and the EPG is not displayed at that timing (step ST56).

In this case, the synthesizing means 8 performs the control C
When the control data g is sent from the PU 7d, the synthesis of the display screen of the EPG is automatically stopped, and only the video signal and the audio signal from the video decoding means 4 and the audio decoding means 5 are output to the display device 9 as the display signal. Will be displayed. Thus, only the video and audio of the commercial or the selected program are output from the synthesizing means 8. Therefore, only the video and audio are provided to the viewer,
Automatic non-display of the EPG is realized on the display device 9.

In the above, the processing operation regarding the automatic non-display of the EPG in the display device 9 displaying the EPG has been described. Even when the EPG is not displayed on the display device 9, the control CPU 7d detects that one or both of the video format and the audio format input around the break time of the program has changed, and FIG. In the same procedure as the flowchart shown,
By sending the control data g to the synthesizing means 8, the EP
The display of G can be suppressed. For example, the display device 9 displays the EPG
Is not displayed, even if the viewer operates the remote controller 10 or the like to instruct the display of the EPG, the control data r for displaying the EPG is maintained until the control data g is released. Invalid, EP
Synthesizing the G display screen is automatically prohibited.

As described above, in the digital broadcast receiver according to the seventh embodiment, the program break time detecting means 20 detects the program break time by using the SI,
d) detecting that the video format and the audio format have changed based on the data indicating the video format and the audio format input before and after the break time, and changing either the video format or the audio format or both of them. EPG
Control data g for instructing the non-display of the EPG is sent to the synthesizing means 8 to automatically stop the synthesis of the EPG display screen,
Since G is configured to be hidden, the start of a commercial or the start of a program in which the format of video or audio in digital broadcasting changes is determined,
At the start of a commercial or program,
The display of the PG can be automatically stopped and hidden.

Embodiment 8 FIG. In the digital broadcast receiver according to the seventh embodiment, the control CPU 7d selects one of the video format and the audio format based on the data indicating the video format and the audio format input before and after the program break time from the program break time detecting means 20. The control data g is output when one or both of them change, and the EPG display screen is automatically hidden. In the eighth embodiment, the EPG screen is automatically hidden by using SEC (sequence end code) detection data input before and after the program break time.

The digital broadcast receiver according to the eighth embodiment can be configured in the same manner as in the case of the seventh embodiment shown in FIG. Therefore, here, only the automatic non-display of the EPG, which is a feature of the digital broadcast receiver according to the eighth embodiment, will be described.

First, the automatic non-display when the EPG is displayed on the display device 9 will be described. EP
In order to display G, the synthesizing means 8 synthesizes the video and audio signals with the EPG display screen signal. In this case, the SEC detection data is input from the video decoding unit 4 to the control CPU 7d to notify that a series of image sequences has been completed. Therefore, the time until the detection of the sequence end code is detected based on the SEC detection data, and the program break time Tc from the program break time detecting means 20 is detected.
If the sequence end code is detected before and after, and the sequence end code is not detected for a certain period of time before that, control data g2 instructing non-display of the EPG is output from the control CPU 7d to the synthesizing means 8, and the EPG is output. Is stopped.

FIG. 15 is a flowchart for explaining the processing operation for automatic non-display. According to FIG.
The operation from outputting the control data g2 from the control CPU 7d to hiding the EPG will be described.

First, data indicating a program break time Tc is input from the program break time detecting means 20 to the control CPU 7d (step ST61). Next, the control CPU 7d resets the timer set time t to 0 in an initial state (step ST62). The time t until the SEC detection data is input from the video decoding means 4
Is counted (step ST63). Thereafter, when the input of the SEC detection data is confirmed in step ST64,
Proceed to step ST65.

In step ST65, if the input of the SEC detection data is before or after the program break time Tc, the process proceeds to step ST66.

In step ST66, it is determined whether the time t from the timer set time to the input of the SEC detection data exceeds a predetermined time Tx, and the time t from the input of the SEC detection data is determined in advance. If the predetermined time Tx has been exceeded, control data g2 for instructing non-display of the EPG is transmitted from the control CPU 7d, and the synthesizing means 8 receives the control data g2 (step ST6).
7). On the other hand, if the SEC detection data is input but not before or after the program break time Tc, or if the time t is shorter than Tx, the process returns to step ST62 and the timer set time is reset (t = 0). Thus, the time t until the next SEC detection data transmitted from the video decoding means 4 is input is counted.

In digital broadcasting, SEC detection data indicating the end of such a sequence is input before and after the break time of a program detected by the program break time detecting means 20, and the sequence end code is detected for a certain period of time before that. If not, it can be determined that it is a program break, such as switching to a program break or a commercial period and restarting the program. Therefore, when the SEC detection data is input before and after the break time of the program detected by the program break time detecting means 20 and the time until the input of the data is longer than a certain time, the control data g2 for instructing the non-display of the EPG is transmitted. The EPG is output and the EPG is not displayed at that timing (step ST68).

In this case, the synthesizing means 8 performs the control C
When the control data g2 is sent from the PU 7d, the synthesis of the display screen of the EPG is automatically stopped, and only the video signal and the audio signal from the video decoding means 4 and the audio decoding means 5 are output to the display device 9 as the display signals. Will be displayed.
Thus, only the video and audio of the commercial or the selected program are output from the synthesizing means 8. Therefore, only the video and audio are provided to the viewer, and the display device 9 realizes automatic non-display of the EPG.

In the above, the processing operation regarding the automatic non-display of the EPG in the display device 9 displaying the EPG has been described. Even when the EPG is not displayed on the display device 9, the control CPU 7 d uses the SEC detection data input before and after the break time of the program to generate the EPG shown in FIG.
Control data g in the same procedure as the flowchart shown in FIG.
By sending 2 to the synthesizing means 8, the display of the EPG can be automatically suppressed. For example, when the EPG is not displayed on the display device 9, the viewer operates the remote controller 10 or the like to display the EPG.
Even if the display of the PG is instructed, the control data r for displaying the EPG is invalidated until the control data g2 is released, and the synthesizing means 8 automatically inhibits the synthesizing of the EPG display screen.

As described above, in the digital broadcast receiver according to the seventh embodiment, the program break time detecting means 20 detects the break time of the program by the SI, and
In d, S before and after the time based on the detected break time
While waiting for input of the EC detection data, if the time until the detection of the sequence end code is longer than a predetermined time, the control data g2 is sent to the synthesizing means 8 to automatically stop synthesizing the EPG display screen, and Since it is configured to be hidden, the start of the commercial or the start of the program in digital broadcasting is determined, and the display of the EPG is automatically stopped at the start of the commercial or the start of the program, and the display of the EPG is stopped. It can be.

Embodiment 9 FIG. The digital broadcast receiver according to the eighth embodiment is configured to automatically hide the EPG screen by using the SEC detection data among the data sent to the control CPU 7d. In the ninth embodiment, a digital broadcast including at least one of a motion detection unit for detecting a motion level and an audio detection unit for detecting an audio level based on an audio signal in a multiplexed stream, together with the program break time detection unit 20. It is configured as a receiver and automatically hides the EPG screen.

FIG. 16 is a block diagram showing an example of the configuration of a digital broadcast receiver according to Embodiment 9 of the present invention. In the figure, reference numerals 1 to 6 and 8 to 10 are the same as those shown in FIG. 1 of the first embodiment. Further, 11 and 12 are the same as the configuration shown in FIG. 6 of the fourth embodiment, and 20 is the same as the configuration shown in FIG. 13 of the seventh embodiment. In addition, 7
Reference numeral e denotes a control CPU, similar to the control CPU 7 in the first embodiment, determines control data based on data from each block and the like, receives a multiplex stream as a digital broadcast signal, and displays a selected program. Is controlling.

Next, the operation of the above-described digital broadcast receiver will be described. A signal received by a receiving antenna (not shown) is input to the tuner 1 and processed.
Subsequent operations from the tuner 1 to the video decoding unit 4, the audio decoding unit 5, and the EPG display processing unit 6 and the operation of the remote controller 10 are the same as those in the first embodiment. Level detection means 1
Since the operation of the second embodiment is the same as the operation of the fourth embodiment and the operation of the program break time detecting means 20 is the same as the operation of the seventh embodiment, detailed description thereof will be omitted.

In FIG. 16, the control CPU 7e sends control data h for synthesizing a display signal together with control data for reception and display to the synthesizing means 8 based on the data of the above-mentioned video format, audio format and the like. Sending out. Remote control 10 allows viewer to enter EP
When an operation for instructing display of G is performed, control data r for instructing EPG display is input from the control CPU 7 e to the synthesizing means 8.

The synthesizing means 8 includes a video signal from the video decoding means 4, an audio signal from the audio decoding means 5,
An EPG display screen signal is sent from the PG display processing means 6, and they are combined based on the control data h from the control CPU 7e, and the EPG is displayed on the display device 9 by the combined output.

Normally, the video signal and audio signal of the selected program are output as they are to the display device 9 as display signals based on the control data h.
Provides program video and audio to viewers. At this time, when the viewer performs an operation of instructing the display of the EPG with the remote controller 10, control data r for instructing the display of the EPG is input from the control CPU 7e to the synthesizing means 8, and for example, FIG.
9 can be displayed on the display device 9 in which an EPG display screen signal is synthesized with a video signal. The above operation is common to the operation in the first embodiment.

Next, automatic non-display when the EPG is displayed on the display device 9 will be described. EPG
Is displayed, the combining means 8 combines the video and audio signals with the EPG display screen signal. In this case, the control CPU 7e includes the program break time Tc from the program break time detecting means 20, the data indicating the motion information of the video from the motion level detecting means 11, and the audio level detecting means 1.
2 and data indicating the information of the audio level. Based on these data, the control CPU 7e stops displaying the EPG when either the video does not move or the sound is silent before or after the program break time, or when both of them continue for a certain period of time. Therefore, control data g3 for instructing non-display of the EPG is output to the synthesizing means 8, and the display of the EPG is stopped.

FIG. 17 is a flowchart for explaining the processing operation for automatic non-display. According to FIG.
The operation from outputting the control data g3 from the control CPU 7e to hiding the EPG will be described.

First, data indicating a program break time Tc is input from the program break time detecting means 20 to the control CPU 7e (step ST71). Next, the control CPU 7e resets the timer set time t to 0 in an initial state (step ST72). Then, it waits for input of data indicating the motion information of the video from the motion level detecting means 11 and data indicating the information of the audio level from the audio level detecting means 12 (step ST73). afterwards,
When data indicating that there is no motion in the video from the motion level detecting means 11 is input, or data indicating silence is input from the audio level detecting means 12, or when both are input, Proceed to step ST74,
If it is determined in step ST74 that the time is before or after the program break time Tc, the process proceeds to step ST75, and the time t is counted. Then, proceed to step 76,
It is determined whether or not the time t counted up to that point exceeds a predetermined time Tx1. If it exceeds the fixed time Tx1, the process proceeds to step ST77. If the data does not exceed the fixed time Tx1 and data indicating whether there is no motion or no sound in the video is continuously input, the process proceeds to step ST73. , ST74 and ST75 are repeated, and the time t is counted continuously.

In this way, in step ST76, the time t before and after the program break time Tc, and when data indicating no motion of the video or data indicating silence is continuously input, the counted time t is set to a predetermined constant value. Time T
When the value exceeds x1, the process proceeds to the next step ST77,
Control data g3 for instructing non-display of EPG is controlled by CPU
7e. On the other hand, if no data indicating no motion of the video or data indicating silence is not input, and if data indicating no motion of the video or data indicating silence is input but not before or after the program break time Tc, step ST72 is performed. And reset the timer set time (t
= 0), and further waits for input of no-motion data or data indicating silence.

In digital broadcasting, before and after a break time of a program detected by the program break time detecting means 20, if either or both of the video does not move or the sound does not last for a certain period of time. It is possible to judge that the program has been switched to a program break or a commercial period, and the program is restarted. Therefore, the control CPU 7e instructs the non-display of the EPG based on the data indicating the motion information of the video input before or after the break time of the program detected by the program break time detecting means 20, or the data indicating the audio level information. The control data g3 to be output is output, and the EPG is not displayed at that timing (step ST78).

In this case, the synthesizing means 8 executes the control C
When the control data g3 is sent from the PU 7e, the synthesis of the display screen of the EPG is automatically stopped, and only the video signal and the audio signal from the video decoding means 4 and the audio decoding means 5 are output to the display device 9 as display signals. Will be displayed.
Thus, only the video and audio of the commercial or the selected program are output from the synthesizing means 8. Therefore, only the video and audio are provided to the viewer, and the display device 9 realizes automatic non-display of the EPG.

The processing operation for automatically hiding the EPG in the display device 9 displaying the EPG has been described above. Even when the EPG is not displayed on the display device 9, the control CPU 7 e determines that the video does not move around the break time of the program, that there is no sound, or that both continue for a certain period of time. Then, the control data g3 is sent to the synthesizing means 8 in the same procedure as the flowchart shown in FIG.
Can be suppressed. For example, when the EPG is not displayed on the display device 9 and the viewer operates the remote controller 10 or the like to instruct the display of the EPG, the EPG is displayed until the control data g3 is released. The control data r for performing the
Synthesizing the G display screen is automatically prohibited.

As described above, in the digital broadcast receiver according to the seventh embodiment, the program break time detecting means 20 detects the break time of the program by using the SI.
e, the control data g3 is generated by the synthesizing means when either the video does not move before or after the break time detected based on the detected break time, or the sound does not sound, or both continue for a predetermined time. 8, the composition of the EPG display screen is automatically stopped and the EPG is not displayed. Therefore, the start of a commercial or the start of a program in digital broadcasting is determined, and the At the start or at the start of the program, the EPG
Can be automatically stopped and hidden.

[0175]

Since the present invention is configured as described above, it has the following effects.

According to the digital broadcast receiver of the first aspect, the synthesizing means does not automatically synthesize the EPG display screen signal based on the detection result from the detecting means, so that the program for digital broadcasting can be used. Is automatically determined, and a digital broadcast receiver that does not display the EPG at that timing can be provided.

According to the digital broadcast receiver of the second aspect, the detecting means extracts the information of the video format and / or the audio format from the video signal and the audio signal in the multiplexed stream, and detects the change of those formats. Since the detecting means is configured to detect the change in the video format and / or the audio format, the synthesizing means can prevent the EPG display screen signal from being synthesized.

According to the digital broadcast receiver of the third aspect, since the detecting means is configured as a means for detecting a sequence end code included in the video signal in the multiplexed stream, the detecting means detects the sequence end code. , The synthesizing means does not synthesize the EPG display screen signal.

According to the digital broadcast receiver of claim 4, the detecting means further comprises means for counting the time after the sequence end code is detected, and the detecting means detects the sequence end code after an interval of a predetermined time or more. Only in this case, the synthesizing means can prevent the EPG display screen signal from being synthesized.

According to the digital broadcast receiver of the fifth aspect, the detecting means detects the motion level based on the video signal in the multiplex stream, or the audio level based on the audio signal in the multiplex stream. Since it is configured to include at least one of the voice detection means for detecting the video, there is no motion in the video, or no sound, or if both states continue for a certain period of time, the synthesis means,
It is possible not to combine the EPG display screen signals.

[0181] According to the digital broadcast receiver of claim 6, the detecting means is a motion detecting means for detecting a motion level based on a video signal in the multiplex stream, or an audio level based on an audio signal in the multiplex stream. Is configured to include at least one of the sound detection means for detecting the motion of the video or the sound after the video has no motion or no sound, or both states continue for a certain period of time. When one or both start, the synthesizing means can prevent the EPG display screen signal from being synthesized.

According to the digital broadcast receiver of the seventh aspect, the motion detecting means includes means for obtaining the amount of motion in the video frame from the motion vector in the video signal, and comparing the amount of motion with the predetermined value to the video. Since there is provided a determination means for determining that there is no motion, it is possible to automatically determine the switching of the program in the digital broadcast and automatically hide the electronic program guide (EPG) at that timing.

According to the digital broadcast receiver of the present invention, the sound detecting means determines the sound level by comparing the sound level with the predetermined value with the means for obtaining the sound level of the sound signal in the predetermined period. Since the switching of the program in the digital broadcast is automatically determined, the electronic program guide (EPG) can be automatically hidden at that timing.

According to the digital broadcast receiver of the ninth aspect, the detecting means is configured as means for detecting a subtitle signal in the multiplexed stream, so that when detecting the subtitle signal, the synthesizing means sets the EPG display screen signal. Can be prevented from being synthesized.

According to the digital broadcast receiver of the tenth aspect, the detecting means further includes program information (Service Information, hereinafter referred to as SI) in the multiplexed stream.
And a program break time detecting means for extracting program break time data from the program. The detecting means detects a state change of a video signal and / or an audio signal in a fixed time width before and after a program break time set by the break time data. Detect and EP
This prevents the synthesis of the G display screen signal from being performed automatically.

According to the digital broadcast receiver of the eleventh aspect, the detecting means extracts the information of the video format and / or the audio format from the video signal and / or the audio signal in the multiplexed stream, and extracts the video format and / or the audio format. And / or as a means for detecting a change in the audio format, the synthesizing means does not synthesize the EPG display screen signal when a change in the video format and / or the audio format is detected within a fixed time width before and after the break time of the program. I can do it.

According to the twelfth aspect of the present invention, since the detecting means is configured to detect the sequence end code included in the video signal in the multiplexed stream, the detecting means is fixed before and after the break time of the program. When detecting the sequence end code in the time width, the synthesizing means:
It is possible not to combine the EPG display screen signals.

[0188] According to the digital broadcast receiver of the thirteenth aspect, the detecting means is a motion detecting means for detecting a motion level based on a video signal in the multiplexed stream, or an audio level based on an audio signal in the multiplexed stream. Is configured to include at least one of the voice detection means for detecting
The synthesizing means does not synthesize the EPG display screen signal when the video does not move for a certain time width before or after the break time of the program, or when there is no sound, or when both states continue for a certain time. Can be.

[0189] According to the digital broadcast receiver of the fourteenth aspect, the motion detecting means includes means for obtaining the amount of motion in the video frame from the motion vector in the video signal, and comparing the amount of motion with the predetermined value to obtain the video. Since there is provided a determination means for determining that there is no motion, it is possible to automatically determine the switching of the program in the digital broadcast and automatically hide the electronic program guide (EPG) at that timing.

According to the digital broadcast receiver of the present invention, the sound detecting means determines the sound level by comparing the sound level with the predetermined value with the means for obtaining the sound level of the sound signal in the predetermined period. Since the switching of the program in the digital broadcast is automatically determined, the electronic program guide (EPG) can be automatically hidden at that timing.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of a configuration of a digital broadcast receiver according to Embodiment 1 of the present invention.

FIG. 2 is a flowchart illustrating a processing operation for automatic non-display according to the first embodiment.

FIG. 3 is a block diagram illustrating an example of a configuration of a digital broadcast receiver according to a second embodiment of the present invention.

FIG. 4 is a flowchart illustrating a processing operation for automatic non-display in the second embodiment.

FIG. 5 is a flowchart illustrating a processing operation for automatic non-display in the third embodiment.

FIG. 6 is a block diagram showing an example of a configuration of a digital broadcast receiver according to a fourth embodiment of the present invention.

FIG. 7 is a block diagram illustrating an example of a configuration of a motion level detection unit according to Embodiment 4.

FIG. 8 is a block diagram illustrating an example of a configuration of a sound level detection unit according to a fourth embodiment.

FIG. 9 is a flowchart illustrating a processing operation for automatic non-display in the fourth embodiment.

FIG. 10 is a flowchart illustrating a processing operation for automatic non-display in the fifth embodiment.

FIG. 11 is a block diagram showing an example of a configuration of a digital broadcast receiver according to a sixth embodiment of the present invention.

FIG. 12 is a flowchart illustrating a processing operation for automatic non-display in the sixth embodiment.

FIG. 13 is a block diagram showing an example of a configuration of a digital broadcast receiver according to a seventh embodiment of the present invention.

FIG. 14 is a flowchart illustrating a processing operation for automatic non-display in the seventh embodiment.

FIG. 15 is a flowchart illustrating a processing operation for automatic non-display in the eighth embodiment.

FIG. 16 is a block diagram showing an example of a configuration of a digital broadcast receiver according to Embodiment 9 of the present invention.

FIG. 17 is a flowchart illustrating a processing operation for automatic non-display in the ninth embodiment.

FIG. 18 is a block diagram illustrating a configuration example of a conventional digital broadcast receiver.

FIG. 19 is a diagram showing an example of an EPG display screen.

[Explanation of symbols]

1 tuner, 2 demodulation means, 3 packet separation means,
4, 4b video decoding means, 5 audio decoding means, 6 EP
G display processing means, 7, 7b to 7f Control CPU, 8, 8
b synthesis means, 9 display device, 11 video level detection means, 12 audio level detection means, 13 motion amount detection means, 14 level determination means, 15 comparison means, 16 level detection means, 17 comparison means, 20 program break time detection means , 30 Caption information processing means.

 ──────────────────────────────────────────────────の Continued on the front page F term (reference) 5C025 AA30 BA25 BA28 CA02 CA09 CB05 CB06 CB09 CB10 DA01 DA05 DA10 5C063 AA20 AB03 AB07 AC01 AC05 AC10 EB33 EB35

Claims (15)

[Claims] 1. A digital broadcast receiver for receiving a multiplex stream as a digital broadcast signal and displaying and processing a selected program or the like, comprising: decoding means for decoding a video signal and an audio signal from the received multiplex stream. The electronic program guide (Electronic
Program Guide, hereafter referred to as EPG. EPG display processing means for taking out and processing data relating to the multiplexed stream and outputting an EPG display screen signal; and detecting means for detecting a change in state of video data and / or audio data being received based on the data in the multiplexed stream. Synthesizing means for synthesizing the video signal, the audio signal output from the decoding means, and the EPG display screen signal,
A digital broadcast receiver, wherein the synthesizing means does not automatically synthesize the EPG display screen signal based on a detection result from the detecting means. 2. The detecting means is configured as a means for extracting information of a video format and / or an audio format from a video signal and an audio signal in a multiplexed stream and detecting a change in those formats. 2. The method according to claim 1, wherein when a change in the video format and / or the audio format is detected, the synthesizing unit does not synthesize the EPG display screen signal and automatically hides the EPG. Digital broadcast receiver. 3. The detecting means is configured as a means for detecting a sequence end code included in a video signal in a multiplexed stream, and when detecting the sequence end code, the synthesizing means: 2. The digital broadcast receiver according to claim 1, wherein the EPG display screen signal is not combined, and the EPG is automatically hidden. 4. The detecting means further comprises means for counting a time after the sequence end code is detected, and the synthesizing means only when the sequence end code is detected after an interval of a predetermined time or more. 4. The digital broadcast receiver according to claim 3, wherein the EPG does not combine the EPG display screen signal and automatically hides the EPG. 5. The motion detecting means for detecting a motion level based on a video signal in a multiplexed stream,
Or at least one of sound detection means for detecting a sound level based on a sound signal in the multiplexed stream, and the video has no motion or no sound, or both. When the state continues for a certain period of time, the synthesizing unit does not synthesize the EPG display screen signal,
2. The digital broadcast receiver according to claim 1, wherein the EPG is automatically hidden. 6. The motion detecting means for detecting a motion level based on a video signal in a multiplexed stream,
Or at least one of sound detection means for detecting a sound level based on a sound signal in the multiplexed stream, and the video has no motion or no sound, or both. The synthesizing unit prevents the EPG display screen signal from synthesizing and automatically hides the EPG when either or both of the video motion and the audio start after the state continues for a certain period of time. The digital broadcast receiver according to claim 1, wherein: 7. The motion detecting means for obtaining a motion amount in a video frame from a motion vector in a video signal, and a judging means for determining that there is no motion in the video by comparing the motion amount with a predetermined value. The digital broadcast receiver according to claim 5, comprising: 8. The sound detecting means includes means for obtaining a sound level in a sound signal for a predetermined period, and determining means for determining that there is no sound by comparing the sound level with a predetermined value. The digital broadcast receiver according to any one of claims 5 and 6. 9. The detecting means is configured as a means for detecting a caption signal in a multiplexed stream, and when detecting the caption signal, the synthesizing means sets the E
2. The digital broadcast receiver according to claim 1, wherein the PG display screen signal is not synthesized, and the EPG is automatically hidden. 10. The system according to claim 1, wherein said detecting means further comprises program information (Service Information, hereinafter referred to as S) in the multiplexed stream.
It is called I. ) Is provided with program break time detecting means for extracting program break time data from the program, wherein the detecting means detects a video signal and / or an audio signal at a fixed time width before and after a program break time set by the break time data. Detecting a state change and detecting the EPG
2. The digital broadcast receiver according to claim 1, wherein the synthesis of the display screen signal is not automatically performed. 11. A means for extracting information on a video format and / or an audio format from a video signal and / or an audio signal in a multiplexed stream and detecting a change in the video format and / or the audio format. When detecting a change in the video format and / or the audio format in a fixed time width before and after the break time of the program, the synthesizing unit does not synthesize the EPG display screen signal, 11. The digital broadcast receiver according to claim 10, wherein is automatically displayed. 12. The detecting means is configured as a means for detecting a sequence end code contained in a video signal in a multiplexed stream, wherein the sequence end code has a predetermined time width before and after a break time of the program. 11. The digital broadcast receiver according to claim 10, wherein when detecting a code, the synthesizing unit does not synthesize the EPG display screen signal and automatically hides the EPG. 13. The method according to claim 13, wherein the detecting unit detects at least one of a motion detecting unit that detects a motion level based on a video signal in the multiplexed stream, and an audio detecting unit that detects an audio level based on an audio signal in the multiplexed stream. If the video does not move for a certain time width before or after the break time of the program, or is silent, or both states continue for a certain time, the combining is performed. The means is E.
11. The digital broadcast receiver according to claim 10, wherein the PG display screen signal is not synthesized, and the EPG is automatically hidden. 14. The motion detecting means for obtaining a motion amount in a video frame from a motion vector in a video signal, and a judging means for judging that there is no motion in the video by comparing the motion amount with a predetermined value. 14. The digital broadcast receiver according to claim 13, comprising: 15. The apparatus according to claim 1, wherein the sound detecting means includes means for obtaining a sound level of the sound signal in a predetermined period, and determining means for determining that there is no sound by comparing the sound level with a predetermined value. The digital broadcast receiver according to claim 13, wherein