JP2001326880A - Information receiving, recording, and reproducing device, information receiving, recording, and reproducing method, medium, and information aggregate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem in a conventional information receiving recording, and reproducing device realizing time-shift reproduction that it cannot smoothly switch the input video audio data. SOLUTION: The information receiving recording, and reproducing device is characterized in that the recording and reproducing device is provided with an output changeover section 111 that selects whether a signal is outputted from a recording disk medium section 105 or a selected signal is outputted not via the recording disk medium section 105, a scene change detection section 103 that detects a part for the selection, and a switching control section 108 that outputs the selected signal not via the recording disk medium section 105 when an instruction of revising the selection of the signal to be outputted is received and switches the output of the selected signal recorded in the recording disk medium section 105 on the basis of the detection result of the scene change detection section 103 as its control.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an information receiving / recording / reproducing apparatus, an information receiving / recording / reproducing method, a medium, and an information aggregate.

[0002]

2. Description of the Related Art A conventional information receiving / recording / reproducing method and apparatus for realizing time shift reproduction using a random accessible disk recording medium is disclosed in JP-A-7-30851.
As described in Japanese Patent Application Publication No. H10-175, there is known an apparatus which records a television program in real time and reproduces the program at an arbitrary time.

[0005] The configuration and operation of a conventional information receiving / recording / reproducing apparatus will be described with reference to FIG. 14, and a conventional information receiving / recording / reproducing method will also be described.

A conventional information receiving / recording / reproducing apparatus converts an analog input video signal of a television broadcast or the like into a digital signal by an AD converter 1401, compresses the digital data converted by a compression processing unit 1403, and enables random access. The video data recorded on the recording device 1404 is read from the recording device 1404 at an arbitrary time, the video data compressed by the decompression processing unit 1405 is decompressed, and the digital data is converted by the DA converter 1407. Video data can be converted to an analog video signal. The switching unit 1408 switches between displaying a current input video signal such as a television broadcast in real time or displaying a video signal reproduced via the recording device 1404.
09 to be displayed.

[0005]

By the way, if the video and audio data is once recorded on a recording medium such as a magnetic disk and a magneto-optical disk which can be randomly accessed and then reproduced, the reproduction is temporarily stopped, Fast playback,
Special reproduction such as forward slow reproduction and reverse high speed reproduction can be realized.

However, when the video / audio data recorded on the recording medium is constantly reproduced, when the reproduction state is switched from the normal reproduction to the special reproduction, or when the reproduction state is switched from the special reproduction to the normal reproduction. Can smoothly switch the reproduction state, but there is a time lag between the input video / audio data and the video / audio data output via the recording medium. For this reason, when switching the input video / audio data (for example, when the input video / audio data is a television broadcast program and the channel to be viewed by the viewer is switched), the channel is switched,
The time of the above-described time lag is required until the video and audio data of the switched channel is output, and the viewer feels that the response of the remote controller is slow.

Of course, the input video / audio data is always reproduced in real time without being recorded on a recording medium, and special reproduction such as pause of reproduction, forward high-speed reproduction, forward slow reproduction, and reverse high-speed reproduction is performed. Only if the video and audio data recorded on the recording medium is reproduced, the switching of the input video and audio data can be smoothly output. There is a time lag between the video and audio data output via the medium, so when switching the playback state from normal playback to the special playback, or when switching the playback state from the special playback to normal playback, , There is a time lag between the video and audio data during normal playback and the video and audio data during special playback, and due to the effect of this time lag,
Smooth playback state switching cannot be realized.

The present invention provides an information receiving / recording / reproducing apparatus, an information receiving / recording / reproducing method, a medium, and an information aggregate capable of smoothly switching input video / audio data in consideration of the above conventional problems. It is intended to provide.

[0009]

Means for Solving the Problems The first invention (claim 1)
Selecting means for selecting a signal to be output based on a predetermined instruction among a plurality of received signals, temporarily recording the selected signal, and reproducing the once recorded signal. And (b) outputting the reproduced signal output from the recording / reproducing means as a first signal, or (b) transmitting the selected signal to a second signal without passing through the recording / reproducing means. Output switching means for switching whether to output as a signal, and detecting a portion for switching from the output of the second signal to the output of the first signal from the signal recorded in the recording / reproducing means. When there is an instruction to change the selection of the signal to be output by the detection means and the selection means, (1) causing the signal selected based on the change instruction to be output without passing through the recording / reproduction means; Then, before (2) Switching control means for performing control for switching to output of a signal selected based on the change instruction, which is recorded in the recording / reproducing means, based on a detection result of a portion for performing the switching by the detection means. And an information receiving / recording / reproducing apparatus.

According to a second aspect of the present invention, there is provided a time information extracting means for extracting, from the signal, information relating to a time corresponding to the detected switching point, and the recording / reproducing means. From the reproduced signal reproduced by the above, the extracted information is examined, and a corresponding switching point specifying means for specifying a position to be switched is provided, and the control for causing the switching based on the detection result is provided. (1) when the detection means detects a location for performing the switching, controls the output switching means to a predetermined state; and (2) the switching location identification means:
When the portion to be switched is specified, the output switching unit is configured to switch to the output of the signal selected based on the change instruction, which is recorded in the recording and reproducing unit. 1 is an information receiving / recording / reproducing apparatus according to the first invention.

According to a third aspect of the present invention (corresponding to claim 3), controlling the output switching means to a predetermined state means that the output switching means is output to the output switching means without passing through the recording / reproducing means. The information receiving / recording / reproducing apparatus according to the second aspect of the present invention is characterized in that a signal selected based on a change instruction is frozen in a state of the detected switching position.

A fourth invention (corresponding to claim 4) is characterized in that the received signal is an analog or digital video / audio signal having a time stamp, and the information is the time stamp. The third embodiment of the present invention is an information receiving / recording / reproducing apparatus according to the present invention.

According to a fifth aspect of the present invention (corresponding to claim 5), the location for performing the switching is a scene switching position of the video / audio signal. It is an information receiving, recording and reproducing apparatus.

According to a sixth aspect of the present invention (corresponding to claim 6), the portion for performing the switching is an audio mode switching position of the video / audio signal. Is an information receiving / recording / reproducing apparatus.

According to a seventh aspect of the present invention (corresponding to claim 7), the video / audio signal has a commercial, and the portion for performing the switching is the commercial portion of the video / audio signal. A fourth aspect of the present invention is an information receiving / recording / reproducing apparatus according to the present invention.

According to an eighth aspect of the present invention (corresponding to claim 8), the portion for performing the switching includes:
A fourth aspect of the present invention is an information receiving / recording / reproducing apparatus according to the present invention, characterized in that (1) a portion having substantially no sound or (2) a portion having substantially no motion from the preceding and following images.

According to a ninth aspect of the present invention (corresponding to claim 9), when there is an instruction to change the selection of a signal to be output from among a plurality of received signals, the signal is selected based on the change instruction. A signal is temporarily recorded to output the selected signal as a first signal, and is output as a second signal. From the recorded signal, the output of the second signal is output to the output of the first signal. Detect the location to switch between,
Thereafter, based on a detection result of a portion for performing the switching, control is performed to switch the recorded signal to an output of a signal selected based on the change instruction. It is a reproduction method.

A tenth aspect of the present invention (corresponding to claim 10) is a program for causing a computer to execute all or some of the functions of all or some of the first to eighth aspects of the present invention. And / or a medium carrying data, wherein the medium can be processed by a computer.

The eleventh invention (corresponding to claim 11) provides:
A medium carrying a program and / or data for causing a computer to execute all or a part of the operations of all or part of the ninth invention,
A medium that can be processed by a computer.

The twelfth invention (corresponding to claim 12) provides:
An information aggregate, which is a program and / or data for causing a computer to execute all or a part of functions of all or a part of any one of the first to eighth aspects of the present invention.

A thirteenth aspect of the present invention (corresponding to claim 13) is:
An ninth aspect of the present invention is an information aggregate, which is a program and / or data for causing a computer to execute all or some of the operations of all or some of the steps of the present invention.

[0022]

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

(Embodiment 1) First, the configuration and operation of the information receiving / recording / reproducing apparatus according to Embodiment 1 will be described mainly with reference to FIG. The configuration and operation of the information receiving / recording / reproducing apparatus according to the present embodiment will be described, and an embodiment of the information receiving / recording / reproducing method according to the present invention will also be described.

First, the configuration of an information receiving / recording / reproducing apparatus for inputting analog video / audio data according to the present embodiment will be described with reference to FIG. In addition, FIG.
FIG. 1 shows a block diagram of an information receiving, recording and reproducing apparatus according to the present embodiment.

As described below, the information receiving / recording / reproducing apparatus according to the first embodiment differs from the conventional information receiving / recording / reproducing apparatus in that video data for which a scene change is performed from input video / audio data is converted to a scene. The output of the video and audio data detected and output by the change detection unit 103 is
The information receiving / recording / reproducing device can be switched by the output switching unit 111 controlled by the switching control unit 108.

The information receiving / recording / reproducing apparatus of the present embodiment
An AD converter (hereinafter, also referred to as an ADC) 101 for digitally converting the input analog video / audio data, a frame memory 110 for temporarily storing digitized video / audio data, and an encoding for coding the digital video / audio data Unit 102, a scene change detecting unit 103 that reads correlation information between the preceding and following images included in the encoded digital video data, and detects a scene switching position from the encoded digital video data, and a time stamp from the encoded digital video and audio data. Time stamp extraction unit 1 for extracting
04 and a randomly accessible disk recording medium unit 1
05 and a time stamp analysis unit 106 for extracting and analyzing a time stamp from the encoded digital video / audio data
A decoding unit 107 for decoding the encoded digital video / audio data, digital video / audio data output without being recorded on the disk recording medium unit 105, and digital video / audio data recorded on the disk recording medium unit 105. Output switching unit 111 for switching the output switching unit, a switching control unit 108 for controlling the output switching unit 111, and a user interface unit 1 for notifying a command from the user to the switching control unit 108.
09 and a DA converter (hereinafter also referred to as DAC) 112 for converting digital video / audio data into analog.

The switching control unit 108 recognizes that a scene change has occurred in the input video data from the output from the scene change detection unit 103, and sets a time stamp for the coded digital video and audio data in which the scene change has been performed. This is a means obtained from the time stamp extraction unit 104. The switching control unit 108 is a unit that obtains a time stamp from the time stamp analysis unit 106 for the encoded digital video / audio data to be reproduced after being recorded on the disk recording medium unit 105. The switching control unit 108
Scene change detection unit 103, time stamp extraction unit 1
04, receiving the output from the time stamp analysis unit 106,
This is a means for controlling the output switching unit 111 that switches between digital video and audio data that is output without being recorded on the disk recording medium unit 105 and digital video and audio data that is reproduced after being recorded on the disk recording medium unit 105.

The means including the user interface section 109 corresponds to the selecting means of the present invention, the means including the disk recording medium section 105 corresponds to the recording / reproducing means of the present invention, and the means including the output switching section 111 corresponds to the present invention. The means including the scene change detecting unit 103 corresponds to the output switching means of the present invention, the means including the switching control unit 108 corresponds to the switching control means of the present invention, and the time stamp extracting unit 104 Means corresponding to the time information extracting means of the present invention, and means including the time stamp analyzing unit 106 correspond to the switching point specifying means of the present invention.

Next, the operation of the information receiving / recording / reproducing apparatus according to the present embodiment when the input video / audio data is switched will be described with reference to FIGS. FIG. 3 is a chart showing a switching process of video and audio data to be output based on an output from the scene change detection unit 103 (see FIG. 1).

In the information receiving / recording / reproducing apparatus shown in FIG. 1, when normal viewing is performed, input analog video / audio data is digitized by the AD converter 101, and then encoded by the encoder 102. . The encoded digital video / audio data is transmitted to a scene change detection unit 103,
The data is recorded on the disk recording medium unit 105 through the time stamp extraction unit 104. The encoded digital video / audio data recorded on the disk recording medium unit 105 passes through a time stamp analysis unit 106, and is decoded into digital video / audio data by a decoding unit 107.
The signal is output as analog video and audio through the DA converter 112. The user normally plays back the video and audio data recorded on the disk recording medium unit 105 in this manner (therefore, switching from normal playback to special playback or switching from special playback to normal playback is performed smoothly. It is possible to do).

When the input video / audio data is switched by the user (for example, when the input video / audio data is a television broadcast program and the channel to be viewed by the user is switched), the user interface unit 109 switches the input video / audio data. Is notified to the switching control unit 108 (S
1).

The switching control unit 108 receives an output from the user interface unit 109 and receives the output from the disk recording medium unit 1.
The output switching unit 111 is controlled so that the video / audio data is output from the video / audio data recorded in the disc 05 without being recorded in the disk recording medium unit 105.
The output is switched from the video / audio data recorded on the disk recording medium unit 105 to the input video / audio data digitized by the AD conversion unit 101 and temporarily stored in the frame memory 110, and the input digital / video data is input to the DA conversion unit 112. The video / audio data is output (S2).

The input video / audio data is supplied to a frame memory 110, an output switching unit 111, a DA conversion unit 11
2 and at the same time, it is always encoded by the encoding unit 102, passed through the scene change detection unit 103 and the time stamp extraction unit 104, and recorded on the disk recording medium unit 105. After that, the output switching unit 11 passes through the time stamp analysis unit 106 and the decoding unit 107.
1 (that is, it can also support special playback such as fast forward playback and reverse fast forward playback).

When the scene change detecting section 103 detects a scene change in the encoded digital video data (S3), the switching control section 108 controls the frame memory 110 to a still video state immediately after the scene change. The video data output through the output switching unit 111 and the DA conversion unit 112 is set to a still image state immediately after the scene change, and the time stamp extraction unit 104 outputs the time stamp of the encoded digital video data in which the scene change has occurred. Is recognized (S4). Note that the frame memory 110 rejects overwriting of data from the AD conversion unit 101 at the time when the still image state is controlled immediately after the scene change.

The time stamp analyzing unit 106 monitors the time stamp of the encoded digital video data output from the disc recording unit 105, and
After the encoded digital video data detected by step 3 is recorded on the disk recording medium unit 105, it is determined whether the encoded digital video data is output from the disk recording medium unit 105 based on the time stamp obtained from the time stamp extraction unit 104. .

When the time stamp analysis unit 106 detects that the encoded digital video data detected by the scene change detection unit 103 has been output from the disk recording medium unit 105 (S5), the switching control unit 108 outputs The digital video / audio data output from the switching unit 111 is switched from the digital video / audio data output from the frame memory 110 to the digital video / audio data output from the decoding unit 107. The time stamp analysis unit 10
Until the time stamp obtained from No. 6 matches the time stamp recognized by the time stamp extraction unit 104, the real-time playback still image output from the frame memory 110 immediately after the detection of the scene change is continued (S).
6).

As described above, when the input video / audio data is switched, the input video / audio data and the video / audio data to be reproduced after being recorded on the recording medium are reproduced in response to the detection of the scene change of the input video data. By switching and outputting, the time lag between the input video / audio data and the video / audio data to be reproduced after being recorded on the recording medium is frozen. An information receiving / recording / reproducing method capable of reducing and smoothly switching output video / audio data can be realized.

(Embodiment 2) Next, Embodiment 2
Will be described mainly with reference to FIG. The configuration and operation of the information receiving / recording / reproducing apparatus according to the present embodiment will be described, and an embodiment of the information receiving / recording / reproducing method according to the present invention will also be described.

First, the configuration of the information receiving / recording / reproducing apparatus according to the present embodiment will be described with reference to FIG. FIG. 2 is a block diagram of the information receiving / recording / reproducing apparatus.

As described below, the information receiving / recording / reproducing apparatus according to the present embodiment inputs coded digital video / audio data instead of analog video / audio data.
Similarly to the information receiving / recording / reproducing apparatus in the first embodiment, the scene change detecting unit 201 detects video data in which a scene change is performed from input video / audio data, and controls output of video / audio data to be output. Part 20
6 is an information receiving / recording / reproducing device that can be switched by the output switching unit 207 under the control of the control unit 6.

As shown in FIG. 2, the information receiving / recording / reproducing apparatus according to the present embodiment reads out the correlation information with the preceding and succeeding video contained in the input coded digital video data, and reads the scene information from the coded digital video data. A scene change detecting unit 201 for detecting a switching position; a time stamp extracting unit 202 for extracting a time stamp from the encoded digital video / audio data; a disk recording medium unit 203 capable of random access; A time stamp analysis unit 204 for extracting and analyzing the encoded data, a decoding unit 208 for decoding the encoded digital video / audio data, and the disk recording medium unit 20
3, an output switching unit 207 for switching between video and audio data output without recording on the recording medium 3 and video and audio data recorded on the disk recording medium unit 203;
7 includes a switching control unit 206 that controls the switching control unit 7, a user interface unit 205 that notifies a command from the user to the switching control unit 206, and a DA conversion unit 209 that converts digital video / audio data into analog data.

The switching control unit 206 recognizes that a scene change has occurred in the input video data from the output from the scene change detection unit 201 and changes the time stamp of the coded digital video and audio data in which the scene change has been performed. This is means obtained from the time stamp extraction unit 202. The switching control unit 206 is a unit that obtains a time stamp from the time stamp analysis unit 204 for the encoded digital video / audio data to be reproduced after being recorded on the disk recording medium unit 203. The switching control unit 206 includes a scene change detection unit 201, a time stamp extraction unit 20
2. An output that receives output from the time stamp analysis unit 204 and switches between video and audio data that is output without being recorded on the disk recording medium unit 203 and video and audio data that is reproduced after being recorded on the disk recording medium unit 203 Switching unit 20
7 is a means for performing control.

The means including the user interface unit 205 corresponds to the selecting means of the present invention, the means including the disk recording medium unit 203 corresponds to the recording / reproducing means of the present invention, and the means including the output switching unit 207 corresponds to the present invention. The means including the scene change detecting unit 201 corresponds to the output switching means of the present invention, the means including the switching control unit 206 corresponds to the switching control means of the present invention, and the time stamp extracting unit 202 Means corresponding to the time information extracting means of the present invention, and means including the time stamp analyzing unit 204 correspond to the switching point specifying means of the present invention.

Next, the operation of the information receiving / recording / reproducing apparatus according to the present embodiment when the input video / audio data is switched will be described.

In the information receiving / recording / reproducing apparatus shown in FIG. 2, when normal viewing is performed, the input coded digital video / audio data passes through a scene change detecting section 201 and a time stamp extracting section 202 to be recorded on a disc. The information is recorded on the medium unit 203. The encoded digital video / audio data recorded on the disk recording medium unit 203 passes through the time stamp analysis unit 204 and the output switching unit 207, and passes through the decoding unit 2
08, after being decoded into digital video / audio data,
The signal passes through the converter 209 and is output as analog video and audio. The user normally reproduces the video / audio data recorded on the disk recording medium unit 203 in this manner.

When the user switches the input video / audio data, the switching of the input video / audio data is notified from the user interface unit 205 to the switching control unit 206.

The switching control unit 206 receives the output from the user interface unit 205 and receives the output from the disk recording medium unit 2.
The output switching unit 207 is controlled so that the video / audio data is output from the video / audio data recorded in the disc 03 without being recorded in the disk recording medium unit 203.

The output switching unit 207 switches the output from the encoded digital video / audio data recorded on the disk recording medium unit 203 to the input encoded digital video / audio data, and outputs the video / audio data to the decoding unit 208. I do.

The input coded digital video / audio data is output to the outside of the apparatus via the output switching unit 207, the decoding unit 208, and the DA conversion unit 209, and at the same time,
The data is always recorded on the disk recording medium unit 203 through the scene change detection unit 201 and the time stamp extraction unit 202, and then output to the output switching unit 207 through the time stamp analysis unit 204.

When a scene change is detected in the input video data by the scene change 201,
The switching control unit 206 controls the decoding unit 208 to the still image state immediately after the scene change, and sets the video data output through the DA conversion unit 209 to the still image state immediately after the scene change.

The switching control unit 206 recognizes, from the time stamp extracting unit 202, the time stamp of the input coded digital video / audio data in which the scene change has occurred. The time stamp analysis unit 204 monitors the time stamp of the encoded digital video / audio data output from the disc recording unit 203, and the video data detected by the scene change detection unit 201 is recorded on the disc recording medium unit 203. Thereafter, it is determined whether or not the data has been output from the disk recording medium unit 203 based on the time stamp obtained from the time stamp extracting unit 202.

When the time stamp analysis unit 204 detects that the encoded digital video / audio data detected by the scene change detection unit 201 has been output from the disk recording medium unit 203, the switching control unit 206 The coded digital video / audio data output from 207 is switched from the input coded digital video / audio data to the coded digital video / audio data output from the time stamp analysis unit 204.

The switching control unit 206 decodes and outputs the encoded digital video / audio data output from the time stamp analysis unit 204 to the decoding unit 208 that outputs a still image immediately after a scene change. Instruct

As described above, even when the input video / audio data is not the analog video / audio data described in the first embodiment but is the encoded digital video / audio data, the input video / audio data When the switching is performed, the input video / audio data and the video / audio data to be reproduced after being recorded on the recording medium are switched and output according to the detection of the scene change of the input video data.
An information receiving / recording / reproducing method capable of reducing a sense of discomfort due to a time lag between the input video / audio data and the video / audio data to be reproduced after being recorded on the recording medium and capable of smoothly switching the output video / audio data can be realized.

(Embodiment 3) Next, Embodiment 3
Will be described mainly with reference to FIG. The configuration and operation of the information receiving / recording / reproducing apparatus according to the present embodiment will be described, and an embodiment of the information receiving / recording / reproducing method according to the present invention will also be described.

First, the configuration of the information receiving / recording / reproducing apparatus for inputting analog video / audio data according to the present embodiment will be described with reference to FIG. In addition, FIG.
FIG. 1 shows a block diagram of an information receiving, recording and reproducing apparatus according to the present embodiment.

As will be described below, the information receiving / recording / reproducing apparatus according to the third embodiment differs from the conventional information receiving / recording / reproducing apparatus in that a change in the voice mode from the input voice data is detected by a voice mode change detecting section. This is an information receiving / recording / reproducing apparatus in which the output of video / audio data detected and output in 403 can be switched by the output switching unit 411 controlled by the switching control unit 408.

The information receiving / recording / reproducing apparatus of the present embodiment
An AD converter 401 for digitally converting the input analog video / audio data, a frame memory 410 for temporarily storing digitized video / audio data, an encoding unit 402 for encoding digital video / audio data, An audio mode change detection unit 403 that reads audio mode information included in video / audio data and detects a change position of the audio mode from the encoded digital video / audio data, and extracts a time stamp that extracts a time stamp from the encoded digital video / audio data Unit 404, a randomly accessible disk recording medium unit 405, a time stamp analyzing unit 406 for extracting and analyzing a time stamp from the encoded digital video and audio data, and a decoding unit 407 for decoding the encoded digital video and audio data In the disk recording medium unit 405. A digital video and audio data to be output without the output switching unit 411 for switching between the digital video and audio data recorded on the disk recording medium 405
And a switching control unit 408 for controlling the output switching unit 411.
, A user interface unit 409 for notifying a command from the user to the switching control unit 408, and a DA conversion unit 412 for converting digital video / audio data into analog data.

The switching control unit 408 recognizes that an audio mode change has occurred in the input video / audio data from the output from the audio mode change detection unit 403, and determines whether or not the encoded digital video / audio data in which the audio mode change has occurred. This is a means for obtaining a time stamp from the time stamp extracting unit 404. The switching control unit 408 is a unit that obtains a time stamp of the encoded digital video / audio data to be reproduced after being recorded on the disk recording medium unit 405 from the time stamp analysis unit 406. Switching control unit 408
Is output from the audio mode change detecting unit 403, the time stamp extracting unit 404, and the time stamp analyzing unit 406, and is output from the digital video and audio data without being recorded on the disk recording medium unit 405;
This is a means for controlling the output switching unit 411 for switching digital video / audio data to be reproduced after being recorded in the digital video / audio data.

The means including the user interface section 409 corresponds to the selecting means of the present invention, the means including the disk recording medium section 405 corresponds to the recording / reproducing means of the present invention, and the means including the output switching section 411 corresponds to the present invention. The means including the voice mode change detecting unit 403 corresponds to the output switching means of the present invention, the means including the switching control unit 408 corresponds to the switching control means of the present invention, and the time stamp extracting unit The unit including 404 corresponds to the time information extracting unit of the present invention, and the unit including the time stamp analyzing unit 406 corresponds to the switching point specifying unit of the present invention.

Next, the operation of the information receiving / recording / reproducing apparatus according to the present embodiment when the input video / audio data is switched will be described mainly with reference to FIGS. FIG. 6 is a chart showing the switching process of the output video / audio data based on the output from the audio mode change detection unit 403 (see FIG. 4).

In the information receiving / recording / reproducing apparatus shown in FIG. 4, when normal viewing is performed, the input analog video / audio data is digitized by the AD converter 401 and then encoded by the encoder 402. .

The encoding section 402 embeds information indicating the type of audio data to be encoded into the encoded digital video / audio data.
In addition, for example, Moving Picture Ex
Various audio modes can be encoded as shown in FIG. 7 by using the encoding technology of the part group (hereinafter also referred to as MPEG), and these audio modes are identified in the encoded digital video / audio data. Information is embedded.

The coded digital video / audio data is supplied to an audio mode change detecting section 403 and a time stamp extracting section 404.
And is recorded on the disk recording medium unit 405. The encoded digital video / audio data recorded on the disk recording medium unit 405 passes through the time stamp analysis unit 406,
After being decoded into digital video / audio data by the decoding unit 407, the data is output as analog video / audio through the output switching unit 411 and the DA conversion unit 412. The user normally reproduces the video and audio data recorded on the disk recording medium unit 405 in this manner.

When the input video / audio data is switched by the user (for example, when the input video / audio data is a television broadcast program and the channel to be viewed by the user is switched), the user interface unit 409 outputs the input video / audio data. Is notified to the switching control unit 408 (S1).

The switching control unit 408 receives the output from the user interface unit 409 and receives the output from the disk recording medium unit 4.
The output switching unit 411 is controlled such that the video / audio data is output from the video / audio data recorded in the disc 05 without being recorded in the disk recording medium unit 405.

The output switching section 411 converts the video / audio data recorded on the disk recording medium section 405 into an AD conversion section 4.
01, the output is switched to the input video / audio data which is digitized and temporarily stored in the frame memory 410,
The video / audio data is output to the DA converter 412 (S
2).

The input video / audio data is stored in a frame memory 410, an output switching section 411, a DA conversion section 41.
2 and at the same time as being output to the outside of the apparatus, is always encoded by the encoding unit 402, and is recorded on the disk recording medium unit 405 through the audio mode change detection unit 403 and the time stamp extraction unit 404. After that, the output switching unit 41 passes through the time stamp analysis unit 406 and the decoding unit 407.
1 is output.

When the audio mode change detection unit 403 detects an audio mode change in the encoded digital video / audio data (S3), the switching control unit 408 stores the frame memory 410 in the still image state immediately after the audio mode change. The video data output through the output switching unit 411 and the DA conversion unit 412 is changed to a still image state immediately after the change in the audio mode, and the time stamp extraction unit 404
Then, the time stamp of the encoded digital video / audio data in which the audio mode change has occurred is recognized (S4).

The time stamp analysis unit 406 monitors the time stamp of the encoded video / audio data output from the disc recording unit 405, and the encoded digital video / audio data detected by the audio mode change detection unit 403 is recorded on the disc. After being recorded on the medium unit 405, it is determined whether or not the data is output from the disk recording medium unit 405 based on the time stamp obtained from the time stamp extracting unit 404.

When the time stamp analysis unit 406 detects that the encoded digital video / audio data detected by the audio mode change detection unit 403 has been output from the disk recording medium unit 405 (S5), the switching control unit 408 determines ,
The digital video / audio data output from the output switching unit 411 is switched from the digital video / audio data output from the frame memory 410 to the digital video / audio data output from the decoding unit 407. The time stamp analysis unit 4
Until the time stamp obtained from the time stamp 06 coincides with the time stamp recognized by the time stamp extracting unit 404, the real-time reproduction still image output from the frame memory 110 immediately after the detection of the audio mode change is continued (S).
6).

As described above, when the input video / audio data is switched, the input video / audio data and the video / audio to be reproduced after being recorded on the recording medium in response to the detection of the audio mode change of the input video / audio data. By switching and outputting the data, the time lag between the input video / audio data and the video / audio data to be reproduced after being recorded on the recording medium is reduced by freezing the video immediately after the change in the audio mode. The information receiving / recording / reproducing method capable of smoothly switching the output video / audio data can be realized.

(Embodiment 4) Next, Embodiment 4
Will be described mainly with reference to FIG. The configuration and operation of the information receiving / recording / reproducing apparatus according to the present embodiment will be described, and an embodiment of the information receiving / recording / reproducing method according to the present invention will also be described.

First, the configuration of the information receiving / recording / reproducing apparatus of the present embodiment will be described with reference to FIG. FIG. 5 is a block diagram of the information receiving / recording / reproducing apparatus.

As described below, the information receiving / recording / reproducing apparatus according to the present embodiment inputs coded digital video / audio data instead of analog video / audio data.
Similarly to the information receiving / recording / reproducing apparatus according to the third embodiment, a change in the audio mode is detected by the audio mode change detection unit 501 from the input audio data, and the output of the video / audio data to be output is output by the switching control unit 506. The information receiving / recording / reproducing device can be switched by the output switching unit 507 under control.

The information receiving / recording / reproducing apparatus according to the present embodiment reads out the audio mode information included in the input coded digital video / audio data, and detects the audio mode change position from the coded digital video / audio data. A change detecting unit 501 and a time stamp extracting unit 50 for extracting a time stamp from the encoded digital video / audio data
2 and a randomly accessible disk recording medium unit 50
3 and a time stamp analysis unit 504 for extracting and analyzing a time stamp from the encoded digital video / audio data
A decoding unit 508 for decoding encoded digital video / audio data; video / audio data output without being recorded on the disk recording medium unit 503;
Output switching unit 507 for switching between the video and audio data recorded in the storage unit, a switching control unit 506 for controlling the output switching unit 507, and a switching control unit 5
06, and a DA converter 509 for converting digital video / audio data into analog data.

The switching control unit 506 recognizes that an audio mode change has occurred in the input video / audio data from the output from the audio mode change detection unit 501, and determines whether the coded digital video / audio data has undergone the audio mode change. Is obtained from the time stamp extracting unit 502. The switching control unit 506 is a unit that obtains a time stamp from the time stamp analysis unit 504 for the encoded digital video / audio data to be reproduced after being recorded on the disk recording medium unit 503. Switching control unit 506
Are output from the audio mode change detecting unit 501, the time stamp extracting unit 502, and the time stamp analyzing unit 504, and are output to the disk recording medium unit 503 without being recorded on the disk recording medium unit 503. This is a means for controlling the output switching unit 507 for switching video / audio data to be reproduced after recording.

The means including the user interface section 505 corresponds to the selecting means of the present invention, the means including the disk recording medium section 503 corresponds to the recording / reproducing means of the present invention, and the means including the output switching section 507 corresponds to the present invention. The means including the audio mode change detecting unit 501 corresponds to the output switching means of the present invention, the means including the switching control unit 506 corresponds to the switching control means of the present invention, and the time stamp extracting unit The unit including 502 corresponds to the time information extracting unit of the present invention, and the unit including the time stamp analyzing unit 504 corresponds to the switching point specifying unit of the present invention.

Next, the operation of the information receiving / recording / reproducing apparatus according to the present embodiment when the input video / audio data is switched will be described.

In the information receiving / recording / reproducing apparatus shown in FIG. 5, when normal viewing is performed, the input coded digital video / audio data is passed through the audio mode change detecting section 501 and the time stamp extracting section 502 to the disk. It is recorded on the recording medium unit 503. The encoded digital video / audio data recorded on the disk recording medium unit 503 passes through the time stamp analysis unit 504 and the output switching unit 507, and passes through the decoding unit 5
08, after being decoded into digital video / audio data,
The signal is output as analog video and audio through the converter 509. The user normally reproduces the video and audio data recorded on the disk recording medium unit 503 in this manner.

When the user switches the input video / audio data, the switching of the input video / audio data is notified from the user interface unit 505 to the switching control unit 506.

The switching control unit 506 receives the output from the user interface unit 505 and receives the output from the disk recording medium unit 5.
The output switching unit 507 is controlled so that video and audio data is output from the video and audio data recorded in No. 03 without being recorded on the disk recording medium unit 503.

The output switching section 507 switches the output from the encoded digital video / audio data recorded on the disk recording medium section 503 to the input encoded digital video / audio data, and outputs the video / audio data to the decoding section 508. I do.

The input coded digital video / audio data is output to the outside of the device via the output switching unit 507, the decoding unit 508, and the DA conversion unit 509, and at the same time,
It is always recorded on the disk recording medium unit 503 through the audio mode change detection unit 501 and the time stamp extraction unit 502, and then output to the output switching unit 507 through the time stamp analysis unit 504.

When an audio mode change is detected in the input video / audio data by the audio mode change detection unit 501, the switching control unit 506 controls the decoding unit 508 to a still video state immediately after the audio mode change. DA converter 5
The video / audio data output through the step 09 is set to a still image state immediately after the change of the audio mode.

The switching control unit 506 also recognizes, from the time stamp extraction unit 502, the time stamp of the input coded digital video / audio data in which the audio mode change has occurred.

The time stamp analysis unit 504 monitors the time stamp of the encoded digital video / audio data output from the disk recording unit 503, and converts the video / audio data detected by the audio mode change detection unit 501 into the disk recording medium unit. After being recorded in the disk recording medium unit 503,
03 is determined based on the time stamp obtained from the time stamp extracting unit 502.

When the time stamp analysis unit 504 detects that the encoded digital video / audio data detected by the audio mode change detection unit 501 has been output from the disk recording medium unit 503, the switching control unit 506 switches the output. The coded digital video / audio data output from the unit 507 is switched from the input coded digital video / audio data to the coded digital video / audio data output from the time stamp analysis unit 504.

Further, the switching control unit 506 decodes the encoded digital video / audio data output from the time stamp analysis unit 504 and outputs the decoded digital video / audio data to the decoding unit 508 outputting the still video immediately after the audio mode change. To do so.

As described above, even when the input video / audio data is not the analog video / audio data as described in the third embodiment but is the encoded digital video / audio data, the input video / audio data When the switching of the input video data is performed, according to the detection of the audio mode change of the input video data, by switching between the input video and audio data and the video and audio data to be reproduced after being recorded on the recording medium,
An information receiving / recording / reproducing method capable of reducing a sense of discomfort due to a time lag between the input video / audio data and the video / audio data to be reproduced after being recorded on the recording medium and capable of smoothly switching the output video / audio data can be realized.

(Embodiment 5) Next, Embodiment 5
Will be described mainly with reference to FIG. The configuration and operation of the information receiving / recording / reproducing apparatus according to the present embodiment will be described, and an embodiment of the information receiving / recording / reproducing method according to the present invention will also be described.

First, the configuration of the information receiving / recording / reproducing apparatus for inputting analog video / audio data according to the present embodiment will be described with reference to FIG. In addition, FIG.
FIG. 1 shows a block diagram of an information receiving, recording and reproducing apparatus according to the present embodiment.

As described below, the information receiving / recording / reproducing apparatus according to the fifth embodiment differs from the conventional information receiving / recording / reproducing apparatus in that a commercial (hereinafter, also referred to as a CM) is converted from input video / audio data. CM detector 803
The information receiving / recording / reproducing apparatus is capable of switching the output of the video / audio data to be detected and output by the output switching unit 811 controlled by the switching control unit 808.

The information receiving / recording / reproducing apparatus of the present embodiment
An AD conversion unit 801 for digitally converting the input analog video / audio data, a frame memory 810 for temporarily storing digitized video / audio data, an encoding unit 802 for encoding digital video / audio data, A CM detection unit 803 that reads CM information included in the video / audio data and detects the position of the CM from the encoded digital video / audio data, and a time stamp extraction unit 80 that extracts a time stamp from the encoded digital video / audio data
4 and a random accessible disk recording medium unit 80
5, a time stamp analysis unit 806 that extracts and analyzes a time stamp from the encoded digital video / audio data
A decoding unit 807 for decoding encoded digital video / audio data, digital video / audio data output without being recorded on the disk recording medium unit 805, and digital video / audio data recorded on the disk recording medium unit 805. Output switching unit 811 for switching the output, a switching control unit 808 for controlling the output switching unit 811, and a user interface unit 8 for notifying a command from the user to the switching control unit 808.
09 and a DA converter 812 that converts digital video / audio data to analog.

The switching control unit 808 recognizes from the output from the CM detection unit 803 that a CM has occurred in the input video / audio data, and extracts the time stamp of the coded digital video / audio data in which the CM has occurred. This is means obtained from the unit 804. Switching control unit 8
A unit 08 obtains a time stamp from the time stamp analysis unit 806 for the encoded digital video / audio data to be reproduced after being recorded on the disk recording medium unit 805. The switching control unit 808 receives the outputs from the CM detection unit 803, the time stamp extraction unit 804, and the time stamp analysis unit 806, and outputs the digital video / audio data that is output without being recorded on the disk recording medium unit 805, A unit that controls an output switching unit 811 that switches digital video / audio data to be reproduced after recording in the unit 805.

The means including the user interface section 809 corresponds to the selecting means of the present invention, the means including the disk recording medium section 805 corresponds to the recording / reproducing means of the present invention, and the means including the output switching section 811 corresponds to the present invention. The means including the CM detection unit 803 corresponds to the output switching unit of the invention, the means including the CM detection unit 803 corresponds to the detection unit of the invention, the unit including the switching control unit 808 corresponds to the switching control unit of the invention, and the time stamp extraction unit 804
Means corresponding to the time information extracting means of the present invention, and means including the time stamp analyzing unit 806 correspond to the switching point specifying means of the present invention.

Next, the operation of the information receiving / recording / reproducing apparatus according to the present embodiment when the input video / audio data is switched will be described mainly with reference to FIGS. FIG. 10 illustrates the CM detection unit 803.
FIG. 10 is a chart showing a switching process of video and audio data to be output in accordance with an output from FIG.

In the information receiving / recording / reproducing apparatus shown in FIG. 8, when normal viewing is performed, the input analog video / audio data is digitized by the AD converter 801 and then encoded by the encoder 802. .

When the video / audio data to be encoded includes a CM, the encoding unit 802 embeds information indicating that the CM has been encoded into the encoded digital video / audio data. The encoded digital video / audio data is output to the CM detection unit 80
3 through the time stamp extraction unit 804 and recorded on the disk recording medium unit 805. Disk recording medium unit 8
05 passes through a time stamp analysis unit 806 and is decoded into digital video and audio data by a decoding unit 807.
11. The signal is output as analog video and audio through the DA converter 812. The user normally reproduces the video and audio data recorded on the disk recording medium unit 805 in this manner.

When the input video / audio data is switched by the user (for example, when the input video / audio data is a TV broadcast program and the channel to be viewed by the user is switched), the user interface unit 809 outputs the input video / audio data. The switching is notified to the switching control unit 808 (S1).

The switching control unit 808 receives the output from the user interface unit 809 and receives the output from the disk recording medium unit 8.
The output switching unit 811 is controlled so that the video / audio data is output from the video / audio data recorded in the disk 05 without being recorded in the disk recording medium unit 805.

The output switching unit 811 converts the video / audio data recorded on the disk recording medium unit 805 into an AD conversion unit 811.
01, and switches the output to the input video / audio data which is digitized and temporarily stored in the frame memory 810.
The video / audio data is output to the DA converter 812 (S
2).

The input video / audio data is stored in a frame memory 810, an output switching section 811, a DA conversion section 81
2 and at the same time as being output to the outside of the apparatus, is always encoded by the encoding unit 802, and the CM detection unit 803,
After being recorded on the disk recording medium unit 805 through the time stamp extracting unit 804, the time stamp analyzing unit 80
6, which is output to the output switching unit 811 through the decoding unit 807.

When a CM is detected in the input video / audio data by the CM detection unit 803 (S3), the switching control unit 808 controls the frame memory 810 to a still video state immediately after the CM detection, and the output switching unit 811, the video data output through the DA converter 812 is set to a still image state immediately after CM detection, and the time stamp extracting unit 804 recognizes the time stamp of the encoded digital video / audio data in which the CM has occurred. (S4).

The time stamp analysis unit 806 monitors the time stamp of the encoded digital video / audio data output from the disk recording unit 805, and converts the encoded digital video / audio data detected by the CM detection unit 803 into a disk recording medium. After being recorded in the unit 805, it is determined whether or not the data is output from the disk recording medium unit 805 based on the time stamp obtained from the time stamp extracting unit 804.

When the time stamp analyzing section 806 detects that the encoded digital video / audio data detected by the CM detecting section 803 has been output from the disk recording medium section 805 (S5), the switching control section 808 outputs The digital video / audio data output from the switching unit 811 is switched from the video / audio data output from the frame memory 810 to the digital video / audio data output from the decoding unit 807. Until the timestamp obtained from the timestamp analyzing unit 806 matches the timestamp recognized by the timestamp extracting unit 804, the real-time playback still image output immediately after the CM detection from the frame memory 810 is continued ( S6).

As described above, when the input video / audio data is switched, the input video / audio data and the video / audio data to be reproduced after being recorded on the recording medium are switched according to the CM detection of the input video data. The video lag between the input video and audio data and the video and audio data to be played back after being recorded on the recording medium. The video is frozen immediately after CM detection to reduce discomfort due to the time lag. In addition, an information receiving / recording / reproducing method capable of smoothly switching output video / audio data can be realized.

(Embodiment 6) Next, Embodiment 6
Will be described mainly with reference to FIG. The configuration and operation of the information receiving / recording / reproducing apparatus according to the present embodiment will be described, and an embodiment of the information receiving / recording / reproducing method according to the present invention will also be described.

First, the configuration of the information receiving / recording / reproducing apparatus of the present embodiment will be described with reference to FIG. FIG. 9 is a block diagram of the information receiving / recording / reproducing apparatus.

As described below, the information receiving / recording / reproducing apparatus according to the present embodiment inputs coded digital video / audio data instead of analog video / audio data.
Similarly to the information receiving / recording / reproducing apparatus in the fifth embodiment, a CM is detected from the input video / audio data by the CM
01 is an information receiving / recording / reproducing apparatus in which output of video / audio data to be detected and output can be switched by an output switching unit 907 controlled by a switching control unit 906.

The information receiving / recording / reproducing apparatus according to the present embodiment reads out CM information included in the input coded digital video / audio data, and detects a CM position from the coded digital video / audio data by a CM detection unit 901. A time stamp extracting unit 902 for extracting a time stamp from the encoded digital video / audio data, a disk recording medium unit 903 capable of random access, and a time stamp analyzing unit 904 for extracting / analyzing the time stamp from the encoded digital video / audio data. A decoding unit 908 for decoding encoded digital video / audio data, video / audio data output without being recorded on the disk recording medium unit 903, and video / audio data recorded on the disk recording medium unit 903. An output switching unit 907 for performing switching and controlling the output switching unit 907 A switching control unit 906, a user interface unit 905 notifies the command from the user to the switching control unit 906, and a DA conversion unit 909 for converting an analog to digital video and audio data.

The switching control unit 906 recognizes from the output from the CM detection unit 901 that a CM has occurred in the input video / audio data, and extracts the time stamp for the coded digital video / audio data in which the CM has occurred. This is means obtained from the unit 902. Switching control unit 90
Reference numeral 6 denotes a unit for obtaining a time stamp from the time stamp analysis unit 904 for the encoded digital video / audio data to be reproduced after being recorded on the disk recording medium unit 903. The switching control unit 906 receives outputs from the CM detection unit 901, the time stamp extraction unit 902, and the time stamp analysis unit 904, and outputs video / audio data that is output without being recorded on the disk recording medium unit 903, 90
3 is a means for controlling the output switching unit 907 for switching the video and audio data to be reproduced after being recorded in No. 3.

The means including the user interface section 905 corresponds to the selecting means of the present invention, the means including the disk recording medium section 903 corresponds to the recording / reproducing means of the present invention, and the means including the output switching section 907 corresponds to the present invention. A unit including the CM detection unit 901 corresponds to the detection unit of the present invention, a unit including the switching control unit 906 corresponds to the switching control unit of the present invention, and a time stamp extracting unit 902.
Means corresponding to the time information extracting means of the present invention, and means including the time stamp analyzing unit 904 correspond to the switching point specifying means of the present invention.

Next, the operation of the information receiving / recording / reproducing apparatus according to the present embodiment when the input video / audio data is switched will be described.

In the information receiving / recording / reproducing apparatus shown in FIG. 9, when normal viewing is performed, the input coded digital video / audio data passes through a CM detecting section 901 and a time stamp extracting section 902 to be recorded on a disc recording medium. Recorded in the section 903. The encoded digital video / audio data recorded on the disk recording medium unit 903 is transmitted to the time stamp analysis unit 9.
04, after passing through the output switching unit 907 and being decoded into digital video / audio data by the decoding unit 908,
9 and output as analog video and audio. The user normally reproduces the video and audio data recorded on the disk recording medium unit 903 in this manner.

When the user switches the input video / audio data, the switching of the input video / audio data is notified from the user interface unit 905 to the switching control unit 906.

The switching control unit 906 receives an output from the user interface unit 905 and receives the output from the disk recording medium unit 9.
03 from the encoded digital video and audio data recorded in
The output switching unit 907 is controlled so that the video / audio data is output without being recorded on the disk recording medium unit 903.

The output switching unit 907 switches the output from the encoded digital video / audio data recorded on the disk recording medium unit 903 to the input encoded digital video / audio data, and outputs the video / audio data to the decoding unit 908. I do.

The input coded digital video / audio data is output to the outside of the device via the output switching unit 907, the decoding unit 908, and the D / A conversion unit 909.
At all times, the CM detection unit 901 and the time stamp extraction unit 90
2 and recorded on the disk recording medium unit 903, and then through the time stamp analysis unit 904 and the output switching unit 9.
07.

When the CM detecting section 901 detects a CM in the input video / audio data, the switching control section 906 controls the decoding section 908 to a still picture state immediately after the CM detection, and sets the DA conversion section 909 to the state. The video and audio data that is output through is set to a still image state immediately after the CM.

The switching control unit 906 also recognizes, from the time stamp extraction unit 902, the time stamp of the input coded digital video / audio data in which the CM has occurred.

The time stamp analysis unit 904 monitors the time stamp of the encoded digital video / audio data output from the disk recording unit 903, and converts the encoded digital video / audio data detected by the CM detection unit 901 into a disk recording medium. After being recorded in the unit 903, it is determined whether or not the data is output from the disk recording medium unit 903 based on the time stamp obtained from the time stamp extracting unit 902.

When the time stamp analysis unit 904 detects that the encoded digital video / audio data detected by the CM detection unit 901 has been output from the disk recording medium unit 903, the switching control unit 906 switches the output switching unit 907. Is switched from the input coded digital video / audio data to the coded digital video / audio data output from the time stamp analysis unit 904.

The switching control unit 906 decodes the encoded digital video / audio data output from the time stamp analysis unit 904 and outputs the decoded digital video / audio data to the decoding unit 908 that outputs the still image immediately after the CM. To instruct.

As described above, even if the input video / audio data is not the analog video / audio data as described in the fifth embodiment but is the encoded digital video / audio, the input video / audio data When the switching is performed, the input video / audio data is switched between the input video / audio data and the video / audio data to be reproduced after being recorded on the recording medium in accordance with the CM detection of the input video / audio data, so that the input video / audio data is , To reduce discomfort due to the time lag between the video and audio data to be played back after being recorded on the recording medium,
An information receiving / recording / reproducing method capable of smoothly switching output video / audio data can be realized.

(Seventh Embodiment) Next, a seventh embodiment will be described.
Will be described mainly with reference to FIG. The configuration and operation of the information receiving / recording / reproducing apparatus according to the present embodiment will be described, and an embodiment of the information receiving / recording / reproducing method according to the present invention will also be described.

First, the configuration of the information receiving / recording / reproducing apparatus for inputting analog video / audio data according to the present embodiment will be described with reference to FIG. Note that FIG.
1 shows a block diagram of the information receiving / recording / reproducing apparatus of the present embodiment.

As described below, the information receiving / recording / reproducing apparatus according to the seventh embodiment is different from the conventional information receiving / recording / reproducing apparatus in that the input video / audio data is used to detect the motion from the preceding and following video without sound. This is an information receiving / recording / reproducing apparatus in which an encoded data amount calculating unit 1103 detects a video portion having no symbol, and an output switching unit 1111 under the control of a switching control unit 1108 can switch output of video / audio data to be output.

The information receiving / recording / reproducing apparatus of the present embodiment
An AD converter 1101 for digitally converting the input analog video / audio data, a frame memory 1110 for temporarily storing digitized video data, an encoder 1102 for encoding digital video / audio data, and an encoded digital video A coded data amount calculation unit 11 for detecting, from the audio data, a video portion which is silent and has no motion from the preceding and following videos;
03, a time stamp extracting unit 1104 for extracting a time stamp from the encoded digital video / audio data, a disk recording medium unit 1105 capable of random access, and a time stamp analyzing unit for extracting / analyzing the time stamp from the encoded digital video / audio data. 1106, a decoding unit 110 for decoding the encoded digital video / audio data
7, digital video / audio data output without being recorded on the disk recording medium unit 1105,
An output switching unit 1111 for switching the digital video / audio data recorded in the storage unit 105; a switching control unit 1108 for controlling the output switching unit 1111; and a user interface unit 1109 for notifying a command from the user to the switching control unit 1108. And a DA converter 1112 for converting digital video / audio data into analog data.

The switching control unit 1108 recognizes from the output from the coded data amount calculation unit 1103 that the input video / audio data has a video portion that is silent and has no motion from the preceding and following video images. A time stamp extracting unit 110 extracts a time stamp of the encoded digital video / audio data in which a video portion having no motion from the video has occurred.
4 means. In addition, the switching control unit 1108
This is a means for obtaining a time stamp from the time stamp analysis unit 1106 for the encoded digital video / audio data to be reproduced after being recorded on the disk recording medium unit 1105.
The switching control unit 1108 controls the encoded data amount calculation unit 110
3. Upon receiving outputs from the time stamp extracting unit 1104 and the time stamp analyzing unit 1106, the disc recording medium unit 1
Output switching unit 1 for switching between digital video and audio data output without recording on 105 and digital video and audio data to be reproduced after being recorded on disk recording medium unit 1105
This is a means for controlling 111.

Note that the user interface unit 1109
Means corresponding to the selecting means of the present invention, means including the disk recording medium unit 1105 corresponds to the recording and reproducing means of the present invention, means including the output switching unit 1111 corresponds to the output switching means of the present invention, The means including the encoded data amount calculation unit 1103 corresponds to the detection means of the present invention, and the switching control unit 1108
Means corresponding to the switching control means of the present invention, means including the time stamp extracting unit 1104 correspond to the time information extracting means of the present invention, and means including the time stamp analyzing unit 1106 correspond to the switching point specifying means of the present invention. Corresponding to

Next, referring mainly to FIGS. 11 and 13, the information receiving / recording / reproducing apparatus according to the present embodiment will be described.
The operation when switching of the input video / audio data occurs will be described. FIG. 13 is a chart showing a switching process of video and audio data to be output based on the output from the encoded data amount calculation unit 1103 (see FIG. 11).

In the information receiving / recording / reproducing apparatus shown in FIG.
During normal viewing, the input analog video / audio data is digitized by the AD converter 1101 and then encoded by the encoder 1102. The encoded digital video / audio data is encoded by an encoded data amount calculation unit 1103.
Is recorded in the disk recording medium unit 1105 through the time stamp extraction unit 1104.

Note that the encoded data amount calculation unit 1103
The position of the silent part from the encoded digital video and audio data,
Detect the position of the video part where there is no movement from the previous and next video. For example, when the MPEG technology is used as the encoding and compression technology, motion prediction from preceding and succeeding videos is used to encode video data. From this motion prediction information, the position of the video portion in a state close to a still image without motion is detected. In the present embodiment, encoded data amount calculation section 1103
Means that in the coded digital video / audio data, if there is a silent portion and a video portion with no movement from the preceding and following images for a period of 1 second or more, the video portion with no motion from the silent portion and the preceding and following video is coded. It is determined that it is included in the video / audio data.

The encoded digital video / audio data recorded on the disk recording medium unit 1105 passes through the time stamp analysis unit 1106, and is decoded into digital video / audio data by the decoding unit 1107.
The signal is output as analog video and audio through the converter 1112. The user can use the disk recording medium unit 1105 in this manner.
Is normally played back.

When the input video / audio data is switched by the user (for example, when the input video / audio data is a television broadcast program and the channel to be viewed by the user is switched), the user interface unit 1109 outputs the input video / audio data. The switching is notified to the switching control unit 1108 (S1).

The switching control section 1108 receives the output from the user interface section 1109, and outputs the video and audio data from the video and audio data recorded on the disk recording medium section 1105 without recording on the disk recording medium section 1105. Thus, the output switching unit 1111 is controlled.

The output switching unit 1111 is digitized by the AD conversion unit 1101 from the video / audio data recorded on the disk recording medium unit 1105, and is output from the frame memory 1110.
Then, the output is switched to the input video / audio data temporarily stored in the storage unit, and the input digital video / audio data is output to the DA converter 1112 (S2).

The input video / audio data is output to the outside of the apparatus via the frame memory 1110, the output switching section 1111 and the DA conversion section 1112, and is always coded by the coding section 1102. After passing through the encoded data amount calculation unit 1103 and the time stamp extraction unit 1104, and recorded on the disk recording medium unit 1105,
The data is output to the output switching unit 1111 through the time stamp analysis unit 1106 and the decoding unit 1107.

When the coded data amount calculation unit 1103 detects a video portion in which no sound is detected and there is no movement from the preceding and following video in the coded digital video / audio data (S
3), the switching control unit 1108 includes a frame memory 1110
To a still image state of a video portion with no sound and no movement from the previous and next video, and the output switching unit 1111 and the DA conversion unit 11
The video data output through 12 is changed to a still image state of a video portion having no motion from the previous and next video, and a video portion having no sound and no motion from the previous and next video occurs for 1 second. The time stamp of the digital video / audio data is recognized (S4).

The time stamp analysis unit 1106 monitors the time stamp of the encoded digital video / audio data output from the disk recording unit 1105, and converts the encoded digital video / audio data detected by the encoded data amount calculation unit 1103 into After being recorded on the disk recording medium unit 1105, it is determined whether or not the data is output from the disk recording medium unit 1105 based on the time stamp obtained from the time stamp extracting unit 1104.

When the time stamp analysis unit 1106 detects that the encoded digital video / audio data detected by the encoded data amount calculation unit 1103 has been output from the disk recording medium unit 1105 (S5), the switching control unit 11
Reference numeral 08 switches the digital video / audio data output from the output switching unit 1111 from the video / audio data output from the frame memory 1110 to the video / audio data output from the decoding unit 1107. The time stamp analysis unit 11
The time stamp obtained from the frame memory 1110 from the frame memory 1110 until the time stamp obtained from the time stamp 06 coincides with the coded digital video data generated for one second in which the silent video portion detected by the time stamp extraction unit 1104 and having no motion from the preceding and following video images match. Then, the real-time reproduction still image output of the video part with no sound and no movement from the preceding and following video is continued (S6).

As described above, when switching of the input video / audio data is performed, the input video / audio data and the recorded By switching and outputting the video and audio data to be played back after recording on the medium, the time lag between the input video and audio data and the video and audio data to be played back after recording on the recording medium is reduced by the sound By freezing the video in the video portion where there is no movement from, the discomfort due to the time lag is reduced,
An information receiving / recording / reproducing method capable of smoothly switching output video / audio data can be realized.

(Eighth Embodiment) Next, an eighth embodiment will be described.
Will be described mainly with reference to FIG. The configuration and operation of the information receiving / recording / reproducing apparatus according to the present embodiment will be described, and an embodiment of the information receiving / recording / reproducing method according to the present invention will also be described.

First, the configuration of the information receiving / recording / reproducing apparatus of the present embodiment will be described with reference to FIG. FIG. 12 shows a block diagram of the information receiving / recording / reproducing apparatus.

As described below, the information receiving / recording / reproducing apparatus according to the present embodiment inputs coded digital video / audio data instead of analog video / audio data.
Similarly to the information receiving / recording / reproducing apparatus according to the seventh embodiment, from the input video / audio data, a video portion having no sound and no movement from the preceding and following video is encoded data amount calculating section 12.
01 is an information receiving / recording / reproducing apparatus that can switch the output of the video / audio data to be detected and output by the output switching unit 1207 controlled by the switching control unit 1206.

The information receiving / recording / reproducing apparatus according to the present embodiment comprises: a coded data amount calculation unit 1201 for detecting, from coded digital video / audio data, a video portion which is silent and has no motion from the preceding and following videos; Time stamp extraction unit 12 for extracting a time stamp from video / audio data
02 and a randomly accessible disk recording medium unit 1
203, a time stamp analysis unit 12 for extracting and analyzing a time stamp from the encoded digital video / audio data
04, a decoding unit 1208 for decoding the encoded digital video / audio data, video / audio data output without being recorded on the disk recording medium unit 1203, and video / audio data recorded on the disk recording medium unit 1203 Output switching section 1207 for switching between output switching section 1207 and output switching section 1207
, A user interface unit 1205 that notifies the switching control unit 1206 of a command from the user, and a DA conversion unit 1209 that converts digital video / audio data into analog.

The switching control unit 1206 recognizes from the output from the encoded data amount calculation unit 1201 that the input video data has a video portion that is silent and has no motion from the previous and next video. This is a means for obtaining a time stamp from the time stamp extraction unit 1202 for the encoded digital video / audio data in which a video portion having no motion from the coded digital video / audio data has occurred. The switching control unit 1206 is a unit that obtains a time stamp from the time stamp analysis unit 1204 for the encoded digital video / audio data to be reproduced after being recorded on the disk recording medium unit 1203. The switching control unit 1206 includes an encoded data amount calculation unit 1201, a time stamp extraction unit 1202, a time stamp analysis unit 12
The output switching unit 1207 controls the switching between the video and audio data that is output without being recorded on the disk recording medium unit 1203 and the video and audio data that is reproduced after being recorded on the disk recording medium unit 1203. It is a means to do.

Note that the user interface unit 1205
Means corresponding to the selecting means of the present invention, means including the disk recording medium unit 1203 corresponds to the recording / reproducing means of the present invention, means including the output switching unit 1207 corresponds to the output switching means of the present invention, The means including the encoded data amount calculation unit 1201 corresponds to the detection means of the present invention, and the switching control unit 1206
Means corresponding to the switching control means of the present invention, means including the time stamp extracting unit 1202 correspond to the time information extracting means of the present invention, and means including the time stamp analyzing unit 1204 correspond to the switching point specifying means of the present invention. Corresponding to

Next, the operation of the information receiving / recording / reproducing apparatus according to the present embodiment when the input video / audio data is switched will be described.

In the information receiving / recording / reproducing apparatus shown in FIG.
In the case of normal viewing, the input coded digital video / audio data is input to the coded data amount calculation unit 1201,
The data is recorded on the disk recording medium unit 1203 through the time stamp extraction unit 1202. Disk recording medium unit 12
03 is passed through a time stamp analysis unit 1204, an output switching unit 1207, is decoded into digital video / audio data by a decoding unit 1208, passes through a DA conversion unit 1209, and is converted into an analog video signal. Output as audio. The user normally reproduces the video and audio data recorded on the disk recording medium unit 1203 in this manner.

When the user switches the input video / audio data, the switching of the input video / audio data is notified from the user interface unit 1205 to the switching control unit 1206.

The switching control section 1206 receives the output from the user interface section 1205, and outputs the video / audio data from the video / audio data recorded on the disk recording medium section 1203 without recording it on the disk recording medium section 1203. The output switching unit 1207 is controlled as described above.

The output switching unit 1207 switches the output from the encoded digital video / audio data recorded on the disk recording medium unit 1203 to the input encoded digital video / audio data, and outputs the video / audio data to the decoding unit 1208. I do.

The input coded digital video / audio data is output to the output switching unit 1207, the decoding unit 1208,
At the same time as being output to the outside of the device via the A conversion unit 1209, the data is always recorded on the disk recording medium unit 1203 through the encoded data amount calculation unit 1201 and the time stamp extraction unit 1202, Analysis unit 120
4 and output to the output switching unit 1207.

When the coded data amount calculation unit 1201 detects a silent video portion in the input video / audio data that has no motion from the preceding and following video images, the switching control unit 1
206 controls the decoding unit 1208 to a still video state of a video portion which is silent and has no motion from the previous and next video, and converts the video and audio data output through the DA Set the still image state of the video part without motion.

The switching control unit 1206 also recognizes, from the time stamp extraction unit 1202, the time stamp of the input coded digital video / audio data in which a video portion with no sound and no motion from the preceding and following video has occurred.

The time stamp analysis unit 1204 monitors the time stamp of the encoded digital video / audio data output from the disk recording unit 1203, and converts the video / audio data detected by the encoded data amount calculation unit 1201 into the disk recording medium. After being recorded in the unit 1203, it is determined whether or not the data is output from the disk recording medium unit 1203 based on the time stamp obtained from the time stamp extracting unit 1202.

When the time stamp analysis unit 1204 detects that the encoded digital video / audio data detected by the encoded data amount calculation unit 1201 has been output from the disk recording medium unit 1203, the switching control unit 1206
The coded digital video / audio data output from the output switching unit 1207 is switched from the input coded digital video / audio data to the coded digital video / audio data output from the time stamp analysis unit 1204.

Further, the switching control unit 1206 sends the time stamp analysis unit 1202 to the decoding unit 1208 which outputs a still image of a video portion in which there is no sound and there is no motion from the preceding and following images.
4 is instructed to decode and output the encoded digital video / audio data output from 4.

As described above, even when the input video / audio data is not the analog video / audio data described in the seventh embodiment but is the encoded digital video / audio data, Is switched, the input video and audio data and the video and audio data to be played back after recording on the recording medium are switched by detecting the silent video portion of the input video data that has no motion from the previous and next video. Information reception and recording that reduces the discomfort caused by the time lag between the input video and audio data and the video and audio data that is played back after recording on the recording medium, and enables smooth switching of the output video and audio data. A reproduction method can be realized.

It should be noted that the control for switching based on the detection result of the present invention means that in the above-described embodiment, (1) the detecting means of the present invention uses Is detected, the output switching means of the present invention is controlled to a predetermined state. (2) When the switching point specifying means of the present invention specifies a part to be switched, the recording / reproducing of the present invention is performed on the output switching means. Recorded in the means,
That is to switch to the output of the signal selected based on the change instruction. However, the present invention is not limited to this, and the control for switching based on the detection result of the present invention may be performed by, for example, (1) even if the detecting means of the present invention detects a part for switching, Continue output of the signal selected based on
(2) When a portion to be switched is output from the recording / reproducing means of the present invention, the output may be switched to the signal selected based on the change instruction, which is recorded in the recording / reproducing means. In this case, a part of the video signal is output once through the recording / reproducing means and then output again via the recording / reproducing means, and the output video may be slightly overlapped. Since the information receiving / recording / reproducing apparatus can have a configuration that does not require the time information extracting means of the present invention or the switching point specifying means of the present invention, it has an advantage that it has a simple structure and can be manufactured at low cost. And a sense of incongruity such as a viewer feeling that the response of the remote controller is slow can be reduced to some extent.

Controlling the output switching means of the present invention to a predetermined state means that in the above-described embodiment, a signal selected based on a change instruction, which is output without passing through the recording / reproducing means, is output. In other words, it is to freeze in the state of the location for performing the detected switching. However, the present invention is not limited to this. Controlling the output switching means of the present invention to a predetermined state may be, for example, outputting to the screen that signal switching is being executed.

In the above-described embodiment, the information relating to the time corresponding to the detected location for performing the switching is a time stamp in the above-described embodiment, but is not limited thereto. Any information may be used as long as it is information relating to the time corresponding to the location for switching, which is used when performing the switching.

Further, the received signal of the present invention is an analog or digital video / audio signal in the above-described embodiment, and the information receiving / recording / reproducing apparatus of the present invention employs any of these video / audio signals. Was compatible. However, the present invention is not limited to this, and the information receiving / recording / reproducing apparatus of the present invention may include an analog / digital switching unit, and may be adapted to both analog and digital video / audio signals. In such a case, it goes without saying that, for example, the recording / reproducing means of the present invention may be commonly used when any of these video / audio signals is used.

Further, the present invention is a medium that carries a program and / or data for causing a computer to execute all or a part of the functions of all or part of the above-described means of the present invention, and is readable by a computer. The program and / or the read data is a medium that executes the function in cooperation with the computer.

Further, the present invention is a medium carrying a program and / or data for causing a computer to execute all or a part of the operations of all or some of the steps of the present invention, and is readable by a computer. The program and / or the read data is a medium that executes the function in cooperation with the computer.

Further, the present invention is an information aggregate that carries a program and / or data for causing a computer to execute all or a part of the functions of all or part of the above-described means of the present invention. The program readable and read and / or
Alternatively, the data is an information aggregate that performs the function in cooperation with the computer.

Further, the present invention is an information aggregate carrying a program and / or data for causing a computer to execute all or a part of the operations of all or some of the above-described steps of the present invention. The readable and read program and / or data is an information aggregate that executes the function in cooperation with the computer.

Data includes a data structure, a data format, a type of data, and the like. The medium includes a recording medium such as a ROM, a transmission medium such as the Internet, and a transmission medium such as light, radio waves, and sound waves. The supported medium is, for example,
A recording medium on which a program and / or data is recorded,
And transmission media for transmitting programs and / or data. For example, in the case of a recording medium such as a ROM, it can be read by a computer, and in the case of a transmission medium, a program and / or data to be transmitted can be transmitted by a computer. As a result, it includes being able to be handled by a computer. The information aggregate includes, for example, software such as programs and / or data.

As described above, the configuration of the present invention may be realized by software or hardware.

As described above, the present invention relates to an information receiving / recording / reproducing method and apparatus for recording / reproducing coded digital video / audio data on / from a randomly accessible disk recording medium. Means for detecting a time stamp of the encoded digital video / audio data to be reproduced, means for analyzing the time stamp of the encoded digital video / audio data reproduced from the disc recording medium, and input video / audio data to the disc recording medium. Means for reproducing after recording, means for reproducing input video and audio data in real time without recording on the recording medium, video and audio data reproduced after recording on the disk recording medium, and recording on the disk recording medium. Output switching means for switching and outputting video and audio data to be reproduced without Output switching means, said time stamp detection means, wherein in response to an output from the time stamp analyzing unit, is characterized in that for switching the video and audio data to be output.

Further, according to the present invention, for example, in the above-described information receiving / recording / reproducing method and apparatus, a scene change detecting means for detecting a scene switching position of input video data is provided, and video and audio data are switched and output. The output switching means switches output video / audio data in response to an output from the scene change detection means.

Further, according to the present invention, for example, in the above-mentioned information receiving / recording / reproducing method and apparatus, there is provided an audio mode switching detecting means for detecting an audio mode switching position of input video / audio data, and the video / audio data is switched. The output switching means for receiving the output from the audio mode switching detecting means switches the video and audio data to be output.

Further, according to the present invention, for example, in the above-described information receiving / recording / reproducing method and apparatus, there is provided a CM detecting means for detecting a CM portion of the input video / audio data, and the video / audio data is switched and output. The output switching means receives the output from the CM detection means and switches the output of the video / audio data to be output.

Further, according to the present invention, for example, in the above-mentioned information receiving / recording / reproducing method and apparatus, there is provided a coded data amount calculating means for detecting a silent portion of coded digital video / audio data and a motion from preceding and following videos. Wherein the output switching means for switching and outputting the video and audio data receives the output from the encoded data amount calculating means and switches the video and audio data to be output.

Further, according to the present invention, for example, in the above-described information receiving / recording / reproducing method and apparatus, the input video / audio data is analog video / audio data, and means for converting analog data into digital data; Means for temporarily storing the obtained video digital data,
Means for encoding digital data, means for recording digital data on the disk recording medium, means for reading digital data from the disk recording medium, means for decoding encoded data, and means for decoding the decoded digital data Is converted into analog data and output.

According to the present invention, for example, in the above information receiving / recording / reproducing method and apparatus, the input video / audio data is coded digital video / audio data, and the digital data is recorded on the disk recording medium. Means for reading digital data from the disk recording medium, means for decoding encoded data, and means for converting the decoded digital data into analog data and outputting the analog data. It is.

As is apparent from the above description, according to the present invention, in an information receiving / recording / reproducing method and apparatus for recording / reproducing digitally encoded video / audio data on a randomly accessible disk recording medium, Means for extracting a time stamp of the encoded digital video / audio data to reproduce the input analog video / audio data or digital video / audio data, and encoded digital video / audio data reproduced from the disk recording medium Means for analyzing the time stamp of the data, means for reproducing after recording on a randomly accessible disk recording medium, means for reproducing without recording on the recording medium, and video / audio data reproduced after recording on the disk recording medium And audio / video data to be reproduced without being recorded on the disk recording medium Output switching means for detecting the scene switching position of the input video data, and output switching means for switching and outputting the video and audio data, wherein the output from the scene change detecting means is output. By switching the output of the video and audio data to be received and output, an advantageous effect is obtained that the switching of the input video and audio data can be performed smoothly.

Further, according to the present invention, in an information receiving / recording / reproducing method and apparatus for recording / reproducing digitally encoded video / audio data on a random accessible disk recording medium, the input / output analog video / audio data, Or a means for extracting the time stamp of the encoded digital video and audio data for reproducing the digital video and audio data, and a means for analyzing the time stamp of the encoded digital video and audio data reproduced from the disk recording medium. Means for reproducing after recording on a randomly accessible disk recording medium, means for reproducing without recording on the recording medium, video and audio data reproduced after recording on the disk recording medium, and recording on the disk recording medium Output switching means for switching and outputting video and audio data to be reproduced without Audio mode switching detecting means for detecting the audio mode switching position of the video / audio data to be output, and output switching means for switching and outputting the video / audio data, receiving and outputting the output from the audio mode switching detecting means By switching the output of the video and audio data, an advantageous effect that the switching of the input video and audio data can be performed smoothly can be obtained.

Further, according to the present invention, in an information receiving / recording / reproducing method and apparatus for recording / reproducing digitally encoded video / audio data on a random accessible disk recording medium, the input / output analog video / audio data, Or a means for extracting the time stamp of the encoded digital video and audio data for reproducing the digital video and audio data, and a means for analyzing the time stamp of the encoded digital video and audio data reproduced from the disk recording medium. Means for reproducing after recording on a randomly accessible disk recording medium, means for reproducing without recording on the recording medium, video and audio data reproduced after recording on the disk recording medium, and recording on the disk recording medium Output switching means for switching and outputting video and audio data to be reproduced without Output means for switching and outputting the video and audio data, receiving the output from the CM detection means and outputting the video and audio data to be output. By switching, the advantageous effect that switching of the input video / audio data can be performed smoothly can be obtained.

According to the present invention, in an information receiving / recording / reproducing method and apparatus for recording / reproducing digitally encoded video / audio data on a disk recording medium which can be randomly accessed, the input / output analog video / audio data, Or a means for extracting the time stamp of the encoded digital video and audio data for reproducing the digital video and audio data, and a means for analyzing the time stamp of the encoded digital video and audio data reproduced from the disk recording medium. Means for reproducing after recording on a randomly accessible disk recording medium, means for reproducing without recording on the recording medium, video and audio data reproduced after recording on the disk recording medium, and recording on the disk recording medium Output switching means for switching and outputting video and audio data to be reproduced without Output data switching means for switching between the video and audio data and outputting the video data and audio data. By switching the output of the video / audio data to be output in response to the output of (1), an advantageous effect that the switching of the input video / audio data can be smoothly performed can be obtained.

The present invention specifically relates to an information receiving / recording / reproducing method and an apparatus for realizing time-shift reproduction using a random accessible disk recording medium. When performing special playback such as directional high-speed playback or reverse high-speed playback, or input channel switching operation, the output video and audio are switched smoothly without discomfort to the viewer. And so on.

[0184]

As is apparent from the above description, the present invention provides an information receiving / recording / reproducing apparatus, an information receiving / recording / reproducing method, which can smoothly switch input video / audio data.
It has the advantage of being able to provide media and information aggregates.

[Brief description of the drawings]

FIG. 1 is a block diagram of an information receiving / recording / reproducing apparatus when analog video / audio data is input according to a first embodiment of the present invention;

FIG. 2 is a block diagram of an information receiving / recording / reproducing apparatus when digital video / audio data is input according to a second embodiment of the present invention;

FIG. 3 is a chart showing an output video / audio switching process according to the first embodiment of the present invention;

FIG. 4 is a block diagram of an information receiving / recording / reproducing apparatus when analog video / audio data is input according to a third embodiment of the present invention;

FIG. 5 is a block diagram of an information receiving / recording / reproducing apparatus when digital video / audio data is input according to a fourth embodiment of the present invention;

FIG. 6 is a chart showing an output video / audio switching process according to a third embodiment of the present invention;

FIG. 7 is a diagram showing an audio mode according to a third embodiment of the present invention.

FIG. 8 is a block diagram of an information receiving / recording / reproducing apparatus when analog video / audio data is input according to a fifth embodiment of the present invention;

FIG. 9 is a block diagram of an information receiving / recording / reproducing apparatus when digital video / audio data is input according to a sixth embodiment of the present invention;

FIG. 10 is a chart showing an output video / audio switching process according to a fifth embodiment of the present invention;

FIG. 11 is a block diagram of an information receiving / recording / reproducing apparatus when analog video / audio data is input according to a seventh embodiment of the present invention;

FIG. 12 is a block diagram of an information receiving / recording / reproducing apparatus when digital video / audio data is input according to an eighth embodiment of the present invention;

FIG. 13 is a chart showing an output video / audio switching process according to a seventh embodiment of the present invention;

FIG. 14 is a block diagram of a conventional information receiving / recording / reproducing apparatus.

[Explanation of symbols]

101, 401, 801, 1101, 1401 AD conversion units 102, 402, 802, 1102 Encoding units 103, 201 Scene change detection units 104, 202, 404, 502, 804, 902, 1
104, 1202 Time stamp extraction unit 105, 203, 405, 503, 805, 903, 1
105, 1203 Disk recording medium unit 106, 204, 406, 504, 806, 904, 1
106, 1204 Time stamp analyzer 107, 208, 407, 508, 807, 908, 1
107, 1208 Decoding unit 108, 206, 408, 506, 808, 906, 1
108, 1206 Switching control unit 109, 205, 409, 505, 809, 905, 1
109, 1205 User interface unit 110, 410, 810, 1110, 1402 Frame memory 111, 207, 411, 507, 811, 907, 1
111, 1207 Output switching unit 112, 209, 412, 509, 812, 909, 1
112, 1209, 1407 DA conversion unit 403, 501 Audio mode change detection unit 803, 901 CM detection unit 1103, 1201 Encoded data amount calculation unit 1403 Compression processing 1404 Recording device 1405 Decompression processing 1408 Switching unit 1409 Display unit 1410 Control unit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C052 AA01 AA03 AC01 BC05 CC11 5C053 FA22 FA23 GB21 HA01 HA21 JA01 KA08 KA24 KA25 KA26 LA07 5D044 AB05 AB07 BC01 BC06 CC05 DE39 DE49 EF01 EF03 FG10 FG14 FG18 GK12

Claims (13)

[Claims] 1. A selecting means for selecting a signal to be output based on a predetermined instruction from a plurality of received signals, and temporarily recording the selected signal, and reproducing the once recorded signal. Recording / reproducing means for: (a) transmitting a reproduced signal output from the recording / reproducing means to a first
Output switching means for switching between outputting as a signal or (b) outputting the selected signal as a second signal without passing through the recording / reproducing means; and From the signal, the second
Detecting means for detecting a portion for switching from output of the signal to output of the first signal; and when there is an instruction to change the selection of the signal to be output by the selecting means, (1) the change The signal selected based on the instruction is output without passing through the recording / reproducing means,
Then, (2) for switching to the output of the signal selected based on the change instruction, which is recorded in the recording / reproducing unit, based on the detection result of the portion for performing the switching by the detecting unit. An information receiving / recording / reproducing apparatus, comprising: switching control means for performing control. 2. A time information extracting means for extracting, from the signal, information on a time corresponding to a position for performing the detected switching, from a reproduced signal reproduced by the recording / reproducing means.
A switching location specifying unit that checks the extracted information and specifies a location where the corresponding switching is to be performed; and performing the control for performing the switching based on the detection result includes: The detecting means controls the output switching means to a predetermined state when detecting the place for performing the switching, and (2) the output switching means when the switching place specifying means specifies the place to be switched. 2. The information receiving / recording / reproducing apparatus according to claim 1, wherein the information is recorded on the recording / reproducing means, and the output is switched to a signal selected based on the change instruction. 3. The control of the output switching means to a predetermined state means that a signal selected based on the change instruction, which is output to the output switching means without passing through the recording / reproducing means, is output to the output switching means. 3. The information receiving / recording / reproducing apparatus according to claim 2, wherein the apparatus is frozen in a state where the detected switching is performed. 4. The information receiving / recording / reproducing apparatus according to claim 3, wherein the received signal is an analog or digital video / audio signal having a time stamp, and the information is the time stamp. 5. The information receiving / recording / reproducing apparatus according to claim 4, wherein the switching is performed at a scene switching position of the video / audio signal. 6. The information receiving / recording / reproducing apparatus according to claim 4, wherein the portion for performing the switching is an audio mode switching position of the video / audio signal. 7. The video / audio signal according to claim 4, wherein the video / audio signal has a commercial, and the portion for performing the switching is the commercial portion of the video / audio signal. Information receiving, recording and reproducing device. 8. A portion for performing the switching is (1) a portion having substantially no sound, or (2) a portion having substantially no motion from the preceding and following images of the video and audio signal. 5. The information receiving / recording / reproducing apparatus according to claim 4, wherein: 9. When there is an instruction to change the selection of a signal to be output among a plurality of received signals, a signal selected based on the change instruction is replaced with a first signal. Is recorded once to output as a second signal, and is output as a second signal. From the recorded signal, a point for switching from the output of the second signal to the output of the first signal is detected, Information reception recording / reproduction, wherein control is performed to switch to the output of the recorded signal selected based on the change instruction, based on a detection result of a portion for performing the switching. Method. 10. A program and / or a program for causing a computer to execute all or a part of the functions of all or part of the present invention according to any one of claims 1 to 8.
Alternatively, a medium that carries data and can be processed by a computer. 11. A medium carrying a program and / or data for causing a computer to execute all or a part of the operations of all or some of the steps of the present invention, which can be processed by a computer. A medium characterized by the following. 12. A program and / or a program for causing a computer to execute all or a part of the functions of all or part of the present invention according to any one of claims 1 to 8.
Or an information aggregate characterized by being data. 13. An information aggregate, which is a program and / or data for causing a computer to execute all or part of all or part of the steps of the present invention according to claim 9.