JP2003143544A - Digital broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcast receiver capable of eliminating unneeded CM broadcast and performing video recording of a program only with correspondence of the digital broadcast receiver without inserting special information, etc., into transmission specifications in receiving digital broadcast and performing video recording of the program. SOLUTION: A database storing the information of each program of CM broadcast is produced inside the digital broadcast receiver, whether or not to be a CM is decided in real time in receiving broadcast, and if it is decided to be a CM, a video recording stop or restart notice is made to an external video recorder or an internal video recording means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast receiving apparatus which deletes unnecessary CMs and records and reproduces when receiving a digital broadcast and recording or reproducing a program.

[0002]

2. Description of the Related Art When an analog television broadcast is recorded on a VCR, some conventional VCRs have a function of recording only the main part and not the CM part. This is a so-called "CM cut function", which is a useful function for a user who wants to delete only the main program part by deleting the CM program inserted between the main programs as shown in FIG. .

This function is realized by distinguishing between a stereo signal of voice and a signal other than stereo. Television commercials are usually operated with stereo audio in most cases.

On the other hand, there are three types of audio used in the main part of the program: monaural audio, bilingual (main / sub) audio, and stereo audio. Generally, monaural audio and bilingual audio are adopted. It is often done. By taking advantage of these differences in signal characteristics and the tendency of use, a function of not recording a stereo audio portion is provided, thereby realizing a function of not recording only a CM program.

FIG. 9 shows a video signal recording / reproducing apparatus and a video service system recording / reproducing apparatus having an advertisement broadcast automatic deleting function of Japanese Patent Laid-Open No. 2001-245242.

The receiving section 901 performs demodulation processing and signal separation processing on the broadcast signal input, and outputs the separated video signal to the video signal processing section 903. The video signal processing unit 903 performs decoding processing of the encoded signal, and outputs the decoded video signal to the recording / reproduction processing unit 905.

On the other hand, the CM information inserted by the sending device is
The signal is separated by the receiving unit 901 and output to the CM information signal processing unit 904. If the user has set the CM-free playback process here, the KEY is used for the CM of the selected channel.
The code of the information signal is decrypted and the decrypted information is output to the recording / reproduction processing unit 905.

In the recording / reproducing processing unit 905, it is possible to reproduce only the broadcast signal from which the CM has been removed by creating data of only the video signal using the decrypted CM information and recording the video. Become.

FIG. 10 shows a recording / reproducing apparatus of a video service system having an automatic advertisement broadcast deleting function. The video signal reproducing unit 1000 and the video signal processing unit 1001 insert the video of the broadcast signal, and the CM information signal generating unit 1002 and the CM information signal processing unit 1003 insert the encrypted CM information.

[0010]

The conventional CM cut function is realized by detecting a difference in audio mode in analog television broadcasting, but in digital broadcasting, a CM is not detected in accordance with a difference in audio mode. difficult.

The audio formats currently used in digital broadcasting are MPEG audio and Dolby AC.
There are three voices, etc., and these voice modes include monaural voice, stereo voice, and bilingual voice, as well as analog voice, and there are voice formats having a multi-channel voice function.

However, in the current operation of digital broadcasting, there is no tendency for the CM and the main part to use the audio mode, and in many cases almost all the parts are operated in stereo audio. That is, the conventional CM cut function based on the analog audio mode detection cannot be applied to digital broadcasting.

Further, the video signal recording / reproducing apparatus having the advertisement broadcast automatic deleting function disclosed in Japanese Unexamined Patent Publication No. 2001-245242 implements a CM cut recording / reproducing function in digital broadcasting, but on the transmitting side. , C
By inserting the M information and encrypting the CM information, the inserted CM information can be identified on the receiver side.

However, in order to realize this function, it is necessary to change the current broadcasting standard, and it is difficult for the existing system to handle it. Further, the user needs to purchase the decryption key from the broadcaster for a fee in order to realize the CM cut function, which imposes a burden.

That is, in order to realize the CM cut function which does not change the existing system and does not require a financial burden on the user, a mechanism for identifying the CM information only by the receiver is required.

[0016]

According to a first aspect of the present invention, there is provided a digital broadcast receiving apparatus, a receiving means for demodulating a digitally modulated signal, and a signal for filtering a video signal and an audio signal from the demodulated received signal. Separation means, video signal decoding / reproducing means for decoding the separated video signal, audio signal decoding means for similarly decoding the separated audio signal, and video / audio signal output from the signal separating means A signal which compares the comparison signal editing and storing means with the video and audio signal output from the signal separating means and the video and audio signal stored in the comparison signal editing and storing means, and outputs the comparison result to the receiver control means. The comparison means and the comparison signal edit storage means are instructed to edit and store, the video signal decoding and reproducing means is instructed to decode the video signal, and the editing panel is presented. Receiver control for instructing the audio signal decoding / reproducing means, for instructing the audio signal decoding and reproducing means, for instructing the signal separating means to output and outputting the video / audio signal, and for instructing the signal comparing means for comparing the signals And means for outputting an instruction from the user to the receiver control means.

According to a second aspect of the present invention, there is provided a digital broadcast receiving apparatus according to the first aspect of the present invention, in which the video / audio signal stored in the comparison signal editing / storing means is converted into a table structure. Is stored again as.

According to a third aspect of the present invention, there is provided a digital broadcast receiving apparatus according to the second aspect, wherein the digital broadcast receiving apparatus according to the second aspect receives an operation command for an external device from the receiver control means and instructs the external recording device. A means for issuing an operation command is provided.

A digital broadcast receiving apparatus according to a fourth aspect of the present invention is the digital broadcast receiving apparatus according to the third aspect, which receives an instruction signal from the receiver control means and is separated by the signal separating means. The stream is accumulated, the accumulated digital broadcast stream is output to the signal separating means, and the CM is converted from the accumulated digital broadcast stream.
It is provided with a recording / playback means for deleting the digital broadcast stream at the time when data exists.

[0020]

(First Embodiment) FIG. 1 is a block diagram showing the configuration of a digital broadcast receiving apparatus according to a first embodiment of the present invention.

The receiving means 100 receives a signal from an antenna or a cable, and performs demodulation and error correction processing of the digitally modulated signal. Then, the transport stream is output to the signal separation means 101.

The signal separating means 101 separates packets of video, audio, and additional information which form a program from each other in order to separate the packets from the packets.
By filtering the corresponding packet I
Filter the transport packets with D. Then, the filtered audio and video signals are
The PES stream is output to the video signal decoding / reproducing means 102 and the audio signal decoding / reproducing means 103.

The output signal is coded, and BS
For digital broadcasting, MPEG2 format is used for video and MPEG2-AAC format is used for audio.

The comparison signal edit storage means 104 has a function of storing the video / audio signal output from the signal separation means 101. The input signal is used as a target of comparison processing in the signal comparison means 105. As a form of a signal to be stored, a signal obtained by encoding audio or video is used, and an elementary stream excluding a PES packet header such as time information is used.

Here, assuming a case where a PES stream is used instead of an elementary stream,
PES (Presentation) is included in the PES packet.
(Time Stamp), etc., but these pieces of information are information related to the timing of actual broadcasting or reproduction and are not related to the video and audio data themselves, and therefore are compared by the signal comparison means 105. Does not mean

The comparison signal editing / storing means 1 for the above-mentioned reason.
In 04, since it is necessary to store only the information of the video and audio itself excluding the time information and the like, the elementary streams are stored and compared.

Further, the signal storage medium in the comparison signal edit storage means 104 has a high random accessibility and is capable of storing video and audio data for a long time, so a hard disk is assumed. The signal that is actually stored is the video and audio elementary stream of the CM that the user wants to delete, and the signal is actually stored according to the procedure described below.

First, a user who is watching a television program depresses the remote controller, which is the instructing means 107, when the CM is started. Thereby, the comparison signal edit storage means 1
For 04, the elementary stream of the video and audio signal that constitutes the CM is input from the signal separation means 101, and the comparison signal edit storage means 104 starts the storage processing of the input signal.

When the user presses the remote controller again at the end of the CM, a signal notifying the end of the CM is output from the receiver control means 106 to the comparison signal edit storage means 104.

After the above processing, the comparison signal edit storage means 104
Ends the signal storage process. Then, the information of the stored data is managed as a list.

However, in the signal storing procedure, the timing at which the user depresses the remote controller is after the signal is output from the signal separating means 101, and therefore the accumulation of the beginning portion of the CM cannot be completed in time.

Since data is always input from the signal separation means 101 to the comparison signal edit storage means 104, data of a fixed size is overwritten before the storage start instruction is notified from the receiver control means 106. By recording, it is possible to store the CM including the beginning part.

The comparison signal edit storage means 104 also has a function of editing the stored CM signal data. That is, the user can edit the beginning and the end of the stored CM signal. When editing, the stored elementary stream is output to the signal separating means 101, and the video signal decoding / reproducing means 102 is outputted.
The video and audio can be reproduced through the audio signal decoding and reproducing means 103.

In addition to the playback function, the comparison signal editing / storing means also includes pause, skip, cue, review, start point setting, end point setting, etc. so that the user can specify the exact start point and end point. Can be done at 104.

In the above function, the panel shown in FIG. 4 is displayed on the external video output device from the receiver control means 106 through the video signal decoding / reproducing means 102. The user can instruct the function by using the remote controller, and the instruction signal is accepted by the instructing means 107 and the receiver controlling means 106.
The command is notified to the comparison signal edit storage means 104 and the processing is executed.

When the start point is set, the start position of the comparison signal is changed, and when the end point is set, the end position of the comparison signal is changed.

By performing the above procedure by the user himself, the CM cut data desired by the user can be created. The size of the signal that can be stored depends on the capacity of the storage device of the comparison signal edit storage unit 104.
The stored CM program data is managed by adding an index, and the head portion of each data can be instantly accessed from the signal comparison means 105 or the like.

The signal comparing means 105 acquires the elementary stream of the video or audio from the signal separating means 101 while reproducing the video or audio through the receiving means 100. In the signal comparison means 105, the input PES
At the same time as the process of removing the header of the stream is performed, the retrieved elementary stream is searched, and the leading data portions of all the elementary streams stored in the comparison signal edit storage unit 104 are compared.

When it is judged that the same signal as the elementary stream stored in the comparison signal edit storage means 104 is input, the receiver control means 106 is notified of the start of the program data, that is, the start notification of the CM program. Is output.

Upon receiving the above signal, the receiver control means 106 uses the video signal decoding / reproducing means 102 to display FIG. 5 to notify the user of the start of the CM program. User is C
It is assumed that the recording operation of the external recording device is temporarily stopped by notifying the start of M as a panel.

In many cases, the same contents of CM programs are broadcast a plurality of times a day. In particular, band sponsors are often fixed for band programs and series programs, and the same content is repeatedly broadcast for CM programs. Therefore, once the CM program is stored on the digital broadcast receiving apparatus side, it is possible to realize a CM cut that is repeatedly broadcast by a method of cutting the CM when the same CM program is reproduced thereafter. is there.

In digital broadcasting, the constituent video and audio signals are digitized, so the same CM is used.
In the case of a program, since the elementary streams of video and audio signals are considered to have the same bit pattern, accurate identification is possible when comparing with the stored stream.

(Embodiment 2) Since the configuration of the digital broadcast receiving apparatus according to Embodiment 2 of the present invention is the same as the configuration of the digital broadcast receiving apparatus according to Embodiment 1, FIG.
Will be explained.

The digital broadcast receiving apparatus according to the second embodiment differs from the digital broadcast receiving apparatus according to the first embodiment in the processing of the comparison signal edit storage means 104.

FIG. 6 shows an image of the stored signal in the comparison signal edit storage means 104 of the digital broadcast receiving apparatus in the first embodiment. In FIG. 6, the video and audio signals need to be stored in order to identify the start and end of the CM program by the signal comparison means 105, but it is not necessary to store the entire CM program.

CM programs usually take at least 15 seconds,
Most CMs can be identified within a few seconds at the beginning, and the end timing can also be identified if there is data for a few seconds in the final part. That is, in order to identify a CM program, it can be said that the data for several seconds at the beginning, the data for several seconds until the end, and the offset information for starting the end data are necessary.

It is also possible to store only the voice data as the data to be stored, and the signal comparing means 105 can also perform the process of comparing only the voice data. By storing these pieces of information, the capacity of the CM data to be stored can be significantly reduced, and the processing amount in the signal comparison means 105 can be reduced.

Then, the comparison signal edit storage means 104 extracts the beginning part and the end part from the stored CM program data, sets the end offset and the data type, and creates the table shown in FIG. Hold.

Upon receiving an instruction from the user, the instruction means 107
When a CM cut start notification is sent from the receiver control means 106 to the signal comparison means 105 via the, the signal comparison means 1
The data table list shown in FIG. 7 is passed to 05,
Pattern comparison between the start data and the input data from the signal separation means 101 is performed.

If there is data in which the patterns match,
At that time, a CM start notification is sent to the receiver control means 106, and the size count of the input data is started. When the count value reaches the offset value of the end data, data comparison with the end data is started, and as a result, if it is determined that the end is normal, a CM data end notification is sent to the receiver control means 106.
Do against.

When the result of the pattern comparison of the end data to be started does not match from the registered offset value, an error notification is given to the receiver control means 106 and a display on a panel or the like for notifying the user of the error. I do. Other operations are the same as those in the first embodiment.

(Embodiment 3) FIG. 2 is a block diagram showing a configuration of a digital broadcast receiving apparatus according to Embodiment 3 of the present invention.

The recording instruction means 208 is the signal comparison means 20.
If it is determined in step 5 that the audio or video data currently being decoded and the audio / video data stored in the comparison signal edit storage means 204 match, that is, if the CM program has started, The result is notified to the receiver control means 205.

If the digital broadcast receiving apparatus is already recording and outputting the video and audio to the external recording device at the time of the above notification, the receiver control means 205 causes the recording instruction means 208 to perform recording. On the other hand, a control signal can be sent to give an instruction to stop the recording operation performed by the external recording device.

On the other hand, if the external recording device is currently in a recording stopped state for CM broadcasting, a recording start signal is sent to the external recording device to the recording instruction means 208 when the CM program ends. Send a control signal.

The recording instruction means 208 transmits a command such as an Ir blaster that can operate an external VCR by using infrared communication. The Ir blaster has commands that can control basic operations of the VCR (record, stop, play, fast forward, rewind, pause, etc.), and these commands can be sent from the digital broadcast receiver to external video equipment. By transmitting, the device operation of the external recording device is realized.

In an environment in which a user uses an external device such as an external recording device that can be operated by the Ir blaster to record from the digital broadcast receiving apparatus, the CM cut function can be automated. For other operations,
This is the same as the second embodiment.

(Embodiment 4) FIG. 3 is a block diagram showing the configuration of a digital broadcast receiving apparatus according to Embodiment 4 of the present invention.

The recording / reproducing means 309 is the signal separating means 3
The transport stream from 01 is acquired, and the transport stream is stored in a mass storage device such as a hard disk. Then, from the recorded program data, C
A method of creating CM data to be M-cut and storing it in the comparison signal edit storage means 304 will be described.

In order to find the CM data from the recorded program data, the recording / reproducing means 309 outputs the transport stream to the signal separating means 301,
The signal separating unit 301 sorts the audio and video signals into video and audio signals, and the video signal decoding and reproducing unit 302 and the audio signal decoding and reproducing unit 303 perform decoding processing to present the video and audio to the user.

At the same time, the video / audio data filtered by the signal separation means 301 is compared with the comparison signal edit storage means 30.
4 is output, and the data is stored while constantly overwriting the data of a fixed size. During video and audio playback,
When the user gives a CM start instruction, the data is compared with the comparison signal editing / storing means 3 from one minute before the overwriting.
The data is stored in 04, and the storage process is stopped when the end instruction is given.

The data stored by the above processing is stored in the comparison signal edit storage means 304 as an elementary stream, and the accurate start / end position of the CM shown in the first embodiment is designated. Also, the information on the CM programs shown in the second embodiment is managed as a table.

Recording / reproducing means 309 shown in the fourth embodiment.
In the case of recording a normal digital broadcast, since it is recorded by program reservation or the like, the CM program and the main part are simultaneously recorded even in the case of recording by a transport stream. As a result, when the recorded program is reproduced, the CM program is also reproduced at the same time.

Now, a method of deleting the CM portion and reproducing the reproduced video and audio data recorded in the transport stream will be described.

When the CM extraction instruction setting is input from the user via the instruction means 307, the receiver control means 305
Is notified to the recording / reproducing means 309.

The recording / playback means 309 refers to the CM program information table managed by the comparison signal edit storage means 304, and searches the recorded data for the corresponding CM program. Then, the PES packet is reconstructed from the recorded transport packet, the elementary stream is further reconstructed, and then the comparison signal edit storage unit 304
The pattern is compared with the CM data stored in.

If the corresponding CM program exists, all packets from the location where the transport packet forming the elementary stream was present to the transport packet where the end packet is present are deleted from the storage medium.

Here, when a transport packet is deleted, a discontinuity of the transport stream occurs, so a DIT packet is inserted. In addition, because a large gap occurs in the PCR because packets for a few seconds to a few tens of seconds are deleted, the DIT Transition_fla
g is 1.

When reproducing the data after deletion, C
The gap at the M missing portion can be minimized. This gap countermeasure is a basic function of the digital broadcast receiving device when the DIT is inserted, and specifically, mute processing of audio and the like, STC (System Time Closure).
k) is reset.

As a result of the above processing, the CM program deletion is realized at the transport stream level, and the recording / playback means 3
Even in a digital broadcast receiving device incorporating 09, the CM cut function at the time of reproduction can be realized. Other operations are the same as those in the third embodiment.

[0071]

The CM deletion function provided in the conventional recording device for analog television broadcasting utilizes the operation in which the frequency of the audio mode used in the CM program and the frequency of the audio mode used in the main program are greatly different. For this reason, it is originally difficult to determine the CM program itself, but it was realized by a very simple method of determining by the audio mode.

On the other hand, in digital television broadcasting, C
There is no correlation between the audio modes used for the M program and the main line program, and there is no information that can distinguish the CM program for other factors. Therefore, in the conventional example, on the sending side of the digital television broadcast, when the CM program is inserted, an identification signal that can be identified by the receiver is also inserted, and it is necessary to deal with it from the system specifications.

Further, in the conventional example, charging is performed by using the CA for receiving the signal identification signal from the receiver side and extracting the CM information. Therefore, in order to realize the CM program deletion function, in the conventional example, in addition to the correspondence on the receiver side,
It was necessary to support the broadcast specifications themselves.

That is, in the case where the existing digital broadcasting and the broadcasting specification in which the CM identification signal or the like is not inserted in the sending side in the future are standardized, only the receiver side is required to realize the CM program deleting function. I had to go.

In the present invention, the function of deleting a CM program is realized without changing the broadcast specifications and the transmission specifications. That is, it is based on a mechanism that once a CM program is stored in the digital broadcast receiving apparatus, and when the same data as the stored CM is received, it is determined that the current data is CM data.

C in the digital broadcast receiving apparatus
By creating and storing the CM program data for deleting the M program, it is possible to detect that the CM has been inserted when the same CM appears next time.

Further, when it is determined that a CM program has been inserted, an external recording device is provided with a recording automatic stop function when the CM program is broadcast and a recording automatic restart function when the CM is finished, and further, the digital broadcast receiving apparatus. By incorporating a recording device inside the device, the automatic deletion function of the CM program can be realized even when the transport stream recording used in digital broadcasting is performed.

In other words, according to the present invention, even in the existing digital broadcasting system, only the correspondence of the receiver side,
Regardless of the internal recording device, it is possible to realize the function of deleting and recording a CM program for recording and reproduction.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a digital broadcast receiving apparatus according to Embodiments 1 and 2 of the present invention.

FIG. 2 is a block diagram showing a configuration of a digital broadcast receiving device according to a third embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a digital broadcast receiving device according to a fourth embodiment of the present invention.

FIG. 4 is an example of an operation panel capable of setting reproduction and CM start and stop positions presented to the user for shaping stored data in the comparison signal edit storage unit according to the first embodiment of the present invention. Figure

FIG. 5 is a diagram showing an example of a panel for notifying a user of the start of a commercial when the commercial is started by the signal comparison means in the first embodiment of the present invention.

FIG. 6 is a diagram showing an example of data of a video / audio signal of a CM program to be stored by a comparison signal edit storage unit according to the second embodiment of the present invention.

FIG. 7 is an image diagram of a table in which, in the comparison signal edit storage means according to the second embodiment of the present invention, the stored CM program data is decomposed into information of start data, final data, final data offset, and data type and held.

FIG. 8 is an image diagram showing a CM program in a program to be solved by the present invention.

FIG. 9 is a diagram of a video signal recording / reproducing device having a conventional advertisement broadcast automatic deletion function.

FIG. 10 is a diagram of a recording / reproducing apparatus of a conventional video service system having an automatic advertisement broadcast deleting function.

[Explanation of symbols]

100, 200, 300 Receiving means 101, 201, 301 Signal separation means 102, 202, 302 Video signal decoding and reproducing means 103, 203, 303 audio signal decoding / reproducing means 104, 204, 304 comparison signal edit storage means 105, 205, 305 signal comparison means 106, 206, 306 receiver control means 107, 207, 307 instruction means 208, 308 Recording instruction means 309 Recording / playback means 901 Receiver 902 Channel selection 903 Video signal processing unit 904 CM information signal processing unit 905 recording / playback processing unit 1000 video signal playback unit 1001 Video signal processing unit 1002 CM information signal generation unit 1003 CM information signal processing unit 1004 transmitter

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G11B 27/031 H04N 5/44 A 27/10 Z H04N 5/44 5/91 N L 5/765 5 / 93 G 5/93 Z G11B 27/02 AF term (reference) 5C025 AA28 AA29 BA25 BA27 BA30 DA01 DA08 5C053 FA01 FA14 FA23 GB06 GB11 GB38 JA07 KA04 LA07 5D044 AB05 AB07 DE03 DE49 EF10 DC23 GK08 GK12 DH77 HA05 HL11 BA05 5D110 AA27 AA29

Claims (4)

[Claims] 1. A receiver for digital broadcasting, the receiving means for demodulating a digitally modulated signal, the signal separating means for filtering a video signal and an audio signal from the demodulated received signal, and the decoding of the separated video signal. Video signal decoding / reproducing means for performing processing, audio signal decoding means for similarly decoding the separated audio signal, comparison signal editing / storing means for storing the video / audio signal output from the signal separating means, and the same as above. A signal comparing means for comparing the video / audio signal output from the signal separating means with the video / audio signal stored in the comparison signal editing storage means and outputting the comparison result to the receiver control means; The storage means is instructed to edit and store, and the video signal decoding / reproducing means is instructed to decode the video signal and the editing panel is presented. Receiver control means for instructing the audio signal decoding / reproducing means to decode the audio signal, instructing the signal separating means for separating and outputting the video / audio signal, and instructing the signal comparing means for signal comparison And a digital broadcast receiving device comprising instruction means for outputting an instruction from the user to the receiver control means. 2. The digital broadcast receiving apparatus according to claim 1, wherein in the digital broadcast receiving apparatus, the video / audio signal stored in the comparison signal edit storage unit is converted and stored again as a table structure. 3. The digital broadcast receiving apparatus according to claim 2, wherein the digital broadcast receiving device further comprises means for receiving an operation command for an external device from the receiver control means and issuing the operation command to the external recording device. apparatus. 4. A digital broadcast receiving device, which receives an instruction signal from a receiver control means, accumulates the digital broadcast stream separated by the signal separating means, and outputs the accumulated digital broadcast stream to the signal separating means, 4. The digital broadcast receiving apparatus according to claim 3, further comprising recording / playback means for deleting the digital broadcast stream at the time when the CM data exists from the accumulated digital broadcast stream.