JP2002247516A - Recording device, reproducing device, and recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect and not record or reproduce a CM part regardless of a voice broadcasting mode. SOLUTION: A CM detection block 50 having a no-sound detector 501 which detects a section wherein the soundless state of a sound signal lasts for a longer time than the regulated time, a memory 502 which stores information on the soundless state, and a CM section detector 503 which detects a CM section from the interval between soundless sections. The CM section information is recorded on a recording medium and the CM part is skipped in reproduction. Or the CM section information is sent to a microcomputer to perform recording to a recoding medium without the CM part or reproduction without the CM part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus capable of preventing the reproduction of a commercial (hereinafter abbreviated as CM) portion in a program recorded on a recording medium such as a magnetic tape, an optical disk or a semiconductor memory. , A playback device, and a recording / playback device. The present invention also relates to a recording device and a recording / reproducing device capable of recording on a recording medium except for a CM portion in a program.

[0002]

2. Description of the Related Art When recording a television broadcast program or the like with a home videotape recorder, a CM inserted and broadcasted in a program is also recorded together with the main program, for example, when performing timer recording. Is done. Therefore, at the time of reproduction, since CMs having no direct relation to the contents of the main part of the program are reproduced in a form inserted in the program, it is not uncommon for many users to feel troublesome to view each CM during reproduction. .

For this reason, a video tape recorder having a CM cut function for performing CM detection by a predetermined method and canceling a CM section using the CM detection result has already been put on the market. To achieve this,
For example, there is one disclosed in JP-A-9-191445.

[0004]

As a conventional method for detecting a CM portion, the following methods have been proposed, which can be roughly classified into those related to video and those related to audio.

[0005] Although various methods have been proposed as detection methods relating to video, images can be temporarily stored,
This is a technically advanced method, such as performing pattern recognition and comparing it with a pattern stored in the device as a pattern. This places a large burden on the device and takes time to determine whether it is a CM. There are many things.

[0006] On the other hand, most of the methods for detecting sound include a method for detecting a change in an audio multiplex broadcast mode which is divided into three modes such as monaural, bilingual, and stereo. In this method, the main part is 2
This is effective when the broadcast is a language audio broadcast and the CM is a stereo audio broadcast or a monaural audio broadcast. However, it is not effective for a program in which both the main part and the CM are broadcast in stereo audio, and cannot be said to be a versatile method.

[0007] The present invention has been made to solve such problems of the prior art, and it is possible to detect a CM portion and prevent the CM portion from being reproduced regardless of the audio broadcast mode. It is an object of the present invention to provide a recording device, a reproducing device, a recording / reproducing device, or a recording device and a recording / reproducing device capable of recording on a recording medium excluding a CM portion in a program.

[0008]

According to the present invention, there is provided a recording apparatus for recording a video signal and an audio signal on a recording medium, comprising: recording means for recording the video signal and the audio signal on the recording medium; A silent section detecting means for detecting a silent section in which a silent state of the audio signal continues, a silent section information storing means for storing information of the silent section, and information on intervals of the silent sections stored in the silent section information storing means. And a CM detecting means for detecting a CM section from the above, thereby achieving the above object.

There may be provided CM section information recording means (for example, realized by control by a microcomputer in an embodiment described later) for recording the CM section information detected by the CM detection means on a recording medium.

When a video signal and an audio signal are recorded on a recording medium, a buffer memory for temporarily storing the video signal and the audio signal and a CM section information detected by the CM detection means are used. The video signal and the audio signal in the buffer memory may include control means for controlling the buffer memory so that the CM section is not output to the recording medium.

According to a second aspect of the present invention, there is provided a reproducing apparatus for reproducing a video signal and an audio signal from a recording medium on which CM section information is recorded by the recording apparatus according to the second aspect of the present invention. Reproducing means for reproducing an audio signal (e.g., realized by a video signal processing block and an audio signal processing block in an embodiment described later) and reading means for reading CM section information recorded on a recording medium (embodiment described later) This is realized by a recording / reproducing block). Based on the CM section information read by the reading means, the CM section of the video signal and the audio signal recorded on the recording medium is skipped so as to be skipped. Having control means for controlling the reproduction means,
Thereby, the above object is achieved.

A reproducing apparatus for reproducing a video signal and an audio signal from a recording medium, comprising: reproducing means for reproducing a video signal and an audio signal from a recording medium;
A silent section detecting means for detecting a silent section in which a silent state of the audio signal continues for a specified time or more; a silent section information storing means for storing information on the silent section; and a silent section stored in the silent section information storing means. CM detecting means for detecting a CM section from the information relating to the interval of, and, based on the CM section information detected by the CM detecting means, skip the CM section from the video signal and the audio signal recorded on the recording medium. Has control means for controlling the reproduction means,
Thereby, the above object is achieved.

A recording / reproducing apparatus of the present invention records a video signal and an audio signal on a recording medium and reproduces the video signal and the audio signal recorded on the recording medium. Recording means for recording an audio signal, reproducing means for reproducing a video signal and an audio signal from a recording medium, and a silent section detecting means for detecting a silent section in which a silent state of the audio signal continues for a specified time or more,
Silent section information storage means for storing information of the silent section,
CM detection means for detecting a CM section from information on the interval of the silent section stored in the silent section information storage means, thereby achieving the above object.

The operation of the present invention will be described below.

In the recording apparatus of the present invention, the silent section detecting means detects a section in which the audio signal remains silent for a specified time or more, and stores the information in the silent section information storage means. , It is possible to detect a CM section from an interval of a silent section, for example.

The video signal and the audio signal are temporarily stored in the buffer memory, and the control means controls the buffer memory based on the detected CM section information so as not to output the CM section to the recording medium. CM in the program
It is possible to record on a recording medium except for.

Further, the detected CM section information can be recorded on a recording medium by CM section information recording means. This CM section information can be used at the time of reproduction.

In the reproducing apparatus of the present invention, the CM section information recorded on the recording medium by the recording apparatus of the present invention is read by the reading means, and the CM section is skipped based on the CM section information. It is possible to prevent the CM from being reproduced by controlling the reproducing means by the control means. Alternatively, the silent section detecting means detects a section in which the silent state of the audio signal continues for a specified time or more, stores the information in the silent section information storage means, and uses the information of the silent section to determine, for example, the interval of the silent section. , It is possible to detect a CM section. Based on this CM section information,
It is possible to control the reproducing means by the control means so as to skip the CM section, so that the CM is not reproduced.

According to the recording / reproducing apparatus of the present invention, the silent section detecting means detects a section in which the audio signal remains silent for a specified time or more, stores the information in the silent section information storage means, and stores the information of the silent section. , It is possible to detect a CM section from an interval of a silent section, for example. This CM
Based on the section information, it is possible to record on a recording medium except for a CM in a program or to prevent the CM from being reproduced.

[0020]

Embodiments of the present invention will be described below.

In television broadcasting, at the end of a commercial, a silent state is always provided for 0.5 second or more. Also, at the end of the main program, for more than 0.5 seconds,
Generally, a silent state is provided. further,
The length of the CM is generally 15 seconds or 30 seconds. Therefore, in the present embodiment, for example, a silence state of 0.5 seconds or more is detected, and when a period between the silence state section and another silence state section is a specified time such as 15 seconds or 30 seconds, the section is detected. Is determined to be a CM section, and that section is not recorded (recorded, recorded) on a recording medium,
Or do not play.

FIG. 1 is a diagram for explaining detection of a CM section according to the present invention. In this example, CM1 and CM2 are broadcast after the main program X, and then the main program Y is broadcast.

First, a section in which a silence state exists for 0.5 second or more (hereinafter, abbreviated as a silence section, and is indicated by "*" (star sign) in FIG. 1). Next, a part where the interval between this silent section and another silent section is 15 seconds or 30 seconds is checked, and that part is defined as a CM section. And
When recording or reproducing, the CM section is cut.

Thus, it is possible to record and reproduce a program by cutting a CM portion which the user feels troublesome.

FIG. 2 is a diagram for explaining the configuration of a recording / reproducing apparatus according to one embodiment of the present invention. In this recording / reproducing apparatus, a television broadcast wave is received by an antenna 1 and supplied to a tuner 2. In tuner 2,
A television broadcast wave received by the antenna 1 is selected, and the received wave is detected and amplified. The output of the tuner 2 is supplied to the video signal processing block 5 and the audio signal processing block 9 via the switch circuit 4.

By switching the switch circuit 4,
Video signal processing block 5 and audio signal processing block 9
, A signal can be supplied from the external input terminal 3.
The input from outside is not limited to this example. For example, the video signal and the audio signal are separated in advance, and the A / D converter 6 described later,
10 may be input.

The video signal processing block 5 extracts a video signal from the supplied signal, and performs an AGC (Auto Gain Control) process, a process related to a luminance / color signal, and the like on the extracted signal. The video signal output from the video signal processing block 5 is converted into digital video data by an A / D converter 6 and supplied to a video signal compression block 7.

The video data supplied to the video signal compression block 7 is transmitted in a predetermined format, for example, DCT (Discrete).
e Cosine Transform) and M which is a compression coding method using predictive coding using a motion vector.
PEG (Moving Picture Expert)
s Group) 2. The compression-encoded video data is stored in the memory 8.
This memory 8 is a buffer memory when recording on a recording medium.

On the other hand, the audio signal processing block 9 extracts an audio signal from the supplied signal. The video signal output from the video signal processing block 5 is converted into digital audio data by the A / D converter 10 and supplied to the audio signal compression block 11.

The audio data supplied to the audio signal compression block 11 is compression-encoded by an MPEG audio system corresponding to a predetermined system, for example, a video data compression system. The compressed and encoded audio data is stored in the memory 1
2 is stored. This memory 12 is a buffer memory for recording on a recording medium.

Further, for the CM detection block 50,
An audio signal is supplied from the memory 12 and used as data for CM detection.

The CM detection block 50 detects a CM section based on the supplied audio signal information. For example, there is a silence state in the audio signal, and the time is set to 0.
If it lasts for more than 5 seconds, it can be determined that there is a candidate for a switching point between the main program and the CM in the silent section. If the time interval between the switching point candidates is 15 seconds or 30 seconds, it can be determined that the section is a CM section.

Incidentally, this recording / reproducing apparatus is entirely a microcomputer (hereinafter abbreviated as a microcomputer).
17. The microcomputer 17 includes a CPU, a ROM in which a program is stored in advance, a RAM as a work memory, and the like. The operation unit 16 includes
Various keys for operating the recording / reproducing apparatus such as reproduction / recording / stop / fast-forward / fast-reverse are provided, and further, keys for controlling the CM cut mode are provided. Signals (shown by dotted lines in the figure) corresponding to various keys are supplied from the operation unit 16 to the microcomputer 17. The microcomputer 17 issues an instruction to each section of the recording / reproducing apparatus based on the signal.

The video data and audio data stored in the memories 8 and 12 are read out from the memories 8 and 12 at a specific timing under the control of the memory controller 18 based on an instruction from the microcomputer 17 and are read via the bus 51. The data is supplied to the recording modulation block 14. The recording modulation block 14 performs error correction encoding on the supplied signal. Then, for example, EFM (Eight to Fourte) is applied to the error-correction-encoded signal.
n Modulation) to convert the signal into a signal suitable for recording. The converted recording signal is supplied to the recording / reproducing block 15.

In the recording / reproducing block 15, a recording signal is written to a disk-shaped recording medium (hereinafter, abbreviated as a disk) 40 made of, for example, a magneto-optical disk under the control of a disk controller 19 based on an instruction from the microcomputer 17, and recorded. Is done. This record is stored in the memories 8 and 12
This is performed based on the time code corresponding to the recording signal read from the.

From the CM detection block 50, as CM section information, for example, position information respectively corresponding to the start point and the end point of the CM section is output as a time code.
The signal is supplied to the recording / reproducing block 15 via the recording modulation block 14.

The information such as the time code corresponding to the CM section and the information of the CM section are stored in a predetermined area of the disc 40, for example, TOC (Table Of Content).
ents) area.
The CM section information is transmitted to the microcomputer 17 via the bus 51.
Can also be supplied.

Further, under the control of the disk controller 19 based on the instruction of the microcomputer 17, the data recorded on the disk 40 is reproduced. The reproduction signal reproduced from the disk 40 is supplied from the recording / reproduction block 15 to the reproduction demodulation block 20. In the reproduction demodulation block 20,
A demodulation process corresponding to the modulation method at the time of recording, that is, EFM demodulation in this example, is performed on the reproduction signal. Then, the error correction code applied at the time of recording is decoded to perform error correction, and video data and audio data are stored in the memories 21 and 26 via the bus 51, respectively. This memory 21, 2
Reference numeral 6 denotes a buffer memory for reproducing a recording from a recording medium.

The video data read from the memory 21 is supplied to a video signal decompression block 22, where the compression encoding performed at the time of recording, in this example, the MPEG2 system is performed. The video signal decompressed and encoded is converted to a D / A converter 2
The video signal is converted into an analog video signal by 3 and supplied to the video signal processing block 24. In the video signal processing block 24, predetermined processing such as emphasis processing is performed on the supplied video signal. The video signal is output from the video signal processing block 24 as a composite signal,
The image is displayed on the monitor 25 as a reproduced image.

On the other hand, the audio data read from the memory 26 is supplied to the audio signal decompression block 27, and the compression encoding performed at the time of recording, in this example, the MPEG audio system is decompressed. The audio signal decompressed and coded is D
The signal is converted into an analog audio signal by the / A converter 28 and supplied to the audio signal processing block 29. In the audio signal processing block 29, predetermined processing such as audio adjustment and amplification is performed on the supplied audio signal, and the audio signal is reproduced by the speaker 30.

Prior to the reproduction of the video and audio signals from the disk 40, the TOC information recorded in the TOC area of the disk 40 is reproduced. Played TOC
The information is supplied to the demodulation block 20 for reproduction, subjected to the processing described above (demodulation processing and decoding of an error correction code), and output as CM section information. The CM section information is stored in a memory in the microcomputer 17 via the bus 51.

When reproducing video and audio, the operation unit 16
By performing a predetermined operation (for example, operating a key for controlling the CM cut mode) in the above, the CM section can be cut.
The time code corresponding to the CM section is obtained from the CM section information reproduced from the OC area.

The microcomputer 17 uses the memory controller 1 based on the time code obtained from the CM section information.
8 to perform read control so as not to read data from the memories 21 and 26. With this control, it is possible to skip the CM section and not reproduce it.

Further, also at the time of recording video and audio, a predetermined operation can be performed by the operation unit 16 to cut a CM section. That is, the time code corresponding to the CM section is obtained by the CM section information detected by the CM detection block 50 based on the audio data stored in the memory 12.

In the microcomputer 17, based on the time code obtained from the CM section information, the memory controller 1
8 to control the output from the memory 8 and the memory 12. With this control, it is possible to prevent the video and audio in the CM section from being written to the recording medium.

Further, at the time of reproducing the video and audio, the CM section can be cut by performing a predetermined operation using the operation unit 16. That is, the time code corresponding to the CM section is obtained based on the CM section information detected by the CM detection block 50 based on the audio data stored in the memory 26.

In the microcomputer 17, based on the time code obtained from the CM section information, the memory controller 1
8 to control the output from the memory 21 and the memory 26. With this control, it is possible to prevent audio and video in the CM section from being output during reproduction.

FIG. 3 is a diagram for explaining the configuration of the CM detection block 50 in the present embodiment in more detail.
In this embodiment, a silent section of the voice is detected, and
It is used as feature information for performing M detection.

In the CM detection block 50, the audio data supplied from the memories 12 and 26 is supplied to the silence detector 501. The silence detector 501 examines the volume in the audio data, and determines whether or not the state in which the volume is equal to or lower than the specified level continues for a specified time, such as 0.5 seconds, for example, as a determination information for a silence section (CM is switched). section)
Is detected. The time code of this silent section is stored in the memory 50.
2 is supplied.

In the next CM section detector 503, the memory 5
The time interval between the silent sections is checked based on the time code of the silent section stored in No. 02, for example, for 15 seconds or 30 seconds.
A silence section group that continues for a specified time such as seconds is detected and determined as a CM section. This CM section information is stored in the detection result memory 504.

The CM section information stored in the memory 504 is read out at a predetermined timing, supplied to the recording / reproducing block 15 via the bus 51 and the recording modulation block 14, and written into the TOC area of the data 40. Also,
It is also supplied to the microcomputer 17 via the bus 51.

The processing by the CM section detector 503 can also be performed by the microcomputer 17. Further, the time code can be obtained from the microcomputer 17 with the writing of the recording signal to the disk 40 under the control of the microcomputer 17 and the disk controller 19, for example.

In the above embodiment, an example of a recording / reproducing apparatus has been described. However, the present invention is also applicable to a recording apparatus or a reproducing apparatus.

[0054]

As described in detail above, according to the present invention,
Regardless of the audio broadcast mode, a portion where a silent state of an audio signal continues for a specified time (for example, 0.5 seconds) or more in a television broadcast is detected, and a specified time (for example, between the silent section and another silent section) is set. If the duration is 15 seconds or 30 seconds, the section can be determined as a CM section and a CM section can be detected. By recording the CM section information on the recording medium, the CM portion can be skipped during reproduction and reproduced. Also, by sending this CM section information to the microcomputer, it is possible to perform recording without the CM part when recording on the recording medium, or to skip the CM part during reproduction and reproduce it.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining detection of a CM section according to the present invention.

FIG. 2 is a block diagram illustrating a schematic configuration of a recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a CM section detection block in the image recording / reproducing apparatus according to one embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 antenna 2 tuner 3 external input terminal 4 switch circuit 5 video signal processing block 6 A / D converter 7 video signal compression block 8 memory 9 audio signal processing block 10 A / D converter 11 audio signal compression block 12 memory 14 for recording Modulation block 15 Recording / reproduction block 16 Operation unit 17 Microcomputer 18 Memory controller 19 Disk controller 20 Reproduction demodulation block 21 Memory 22 Video signal expansion block 23 D / A converter 24 Video signal processing block 25 Monitor 26 Memory 27 Audio signal expansion block 28 D / A converter 29 Audio signal processing block 30 Speaker 501 Silence detector 502 Memory 503 CM section detector 504 Detection result memory

Claims (6)

[Claims] 1. A recording apparatus for recording a video signal and an audio signal on a recording medium, comprising: recording means for recording the video signal and the audio signal on the recording medium; and detecting a silent section in which a silent state of the audio signal continues for a specified time or more. A silent section detecting means for storing the information of the silent section; a CM detecting means for detecting the CM section from the information on the interval of the silent section stored in the silent section information storing means. Having a recording device. 2. The C detected by the CM detection means.
2. The recording apparatus according to claim 1, further comprising CM section information recording means for recording M section information on a recording medium. 3. When a video signal and an audio signal are recorded on a recording medium, a buffer memory for temporarily storing the video signal and the audio signal and a CM section information detected by the CM detection means are provided. 3. The recording apparatus according to claim 1, further comprising control means for controlling the buffer memory so that a CM section of the video signal and the audio signal in the buffer memory is not output to a recording medium. 4. The recording apparatus according to claim 2, wherein
A reproducing apparatus for reproducing a video signal and an audio signal from a recording medium on which M section information is recorded, a reproducing means for reproducing the video signal and the audio signal from the recording medium, and a read for reading CM section information recorded on the recording medium Means, and control means for controlling the reproducing means so as to skip the CM section of the video signal and the audio signal recorded on the recording medium based on the CM section information read by the reading means. Playback device. 5. A reproducing apparatus for reproducing a video signal and an audio signal from a recording medium, comprising: reproducing means for reproducing the video signal and the audio signal from the recording medium; and detecting a silent section in which a silent state of the audio signal continues for a specified time or more. A silent section detecting means for storing the information of the silent section; a silent section information storing means for storing information of the silent section; a CM detecting means for detecting a CM section from the information on the interval of the silent section stored in the silent section information storing means; A reproducing apparatus having control means for controlling the reproducing means so as to skip the CM section of the video signal and the audio signal recorded on the recording medium based on the CM section information detected by the CM detecting means; . 6. A recording / reproducing apparatus which records a video signal and an audio signal on a recording medium and reproduces the video signal and the audio signal recorded on the recording medium. Means, a reproducing means for reproducing a video signal and an audio signal from a recording medium, a silent section detecting means for detecting a silent section in which a silent state of the audio signal continues for a specified time or more, and a silent section for storing information of the silent section A recording / reproducing apparatus comprising: an information storage unit; and a CM detection unit configured to detect a CM section from information on a silent section interval stored in the silent section information storage unit.