JP2000354223A - Disk recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a high-speed for movement to a reproduced position and to display attached information as text. SOLUTION: A CM detection circuit 6 receives a recording stream from a receiver 2 and sets a chapter point to each end of a CM period. A reproduction information generator 7 receives the chapter information to generate reproduction information so as to attain movement to the chapter point in the case of reproduction. Furthermore, a text information generator 45 receives program information and the chapter information to convert them into text information. A disk 4 records the text information and the reproduced information together with the recording stream. In the case of reproduction, the text information is reproduced to display a language of a voice and caption included in the program information as text. Moreover, high speed movement to the chapter point is attained by the reproduction information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a disk recording apparatus suitable for recording program data having a plurality of sounds and subtitles.

[0002]

2. Description of the Related Art In recent years, digital processing of images has become widespread.
D (Digital Versatile Disc) has also been developed. DV
The television signal to be recorded on D is encoded by the MPEG system in consideration of a variable bit rate (hereinafter, referred to as VBR).

FIG. 11 is a block diagram showing a conventional disk recording apparatus for recording a broadcast signal using such a recordable DVD disk.

[0004] A television broadcast signal induced by a television broadcast receiving antenna 17 is supplied to a receiver 2. The receiving device 2 selects a broadcast signal of a specific channel and supplies it to the video / audio separator 18. The selected broadcast signal is separated into a video signal and an audio signal by a video / audio separator 18 and supplied to a video encoder (VEnc) 19 and an audio encoder (AEnc) 20, respectively.

[0005] Encoders 19 and 20 code-compress video and audio signals, respectively, to obtain MPEG video streams or audio streams. The MPEG video stream and the audio stream are packetized in a predetermined unit by the selection device 15, respectively, multiplexed, and supplied to the recording device 3 as a system stream. The recording device 3 records the input system stream on the disk 4.

In digital television broadcasting, a signal encoded by the MPEG system is transmitted.
FIG. 12 is a block diagram showing a conventional disk recording apparatus for receiving and recording a digital broadcast signal.

In FIG. 12, a digital television broadcast signal received by a digital television broadcast receiving antenna 1 is supplied to a receiving device 2. The receiving device 2 selects and demodulates a digital television broadcast signal. From the receiving device 2, a specific system stream in which the video signal and the audio signal are multiplexed is obtained. This system stream is supplied to the recording device 3, and the recording device 3
The system stream is recorded on the disk 4.

As described above, in the conventional disk recording apparatus, the received broadcast signal is recorded as it is without processing. By the way, as a method of searching for a program recorded on a disc, a method of searching while the user confirms by fast-forwarding or rewinding can be considered. However, this method requires a long time for searching.

There is also a method of directly moving to a designated position by designating a time. In this method, the playback position can be moved to the designated position in a short time, but it is necessary to know the time at a predetermined location in advance.

In digital television broadcasting, audio and subtitle data in a plurality of languages can be transmitted. In the conventional disk recording device described above,
A plurality of audio signals and a plurality of subtitle signals can be simultaneously recorded on a disc in association with a video signal. In this case, at the time of reproduction, the language such as audio and subtitles can be changed by remote control operation. However, the user cannot know in advance which language is included in the recorded program, and only knows the type of language after the operation.

[0011]

As described above, the conventional disk recording apparatus described above has a problem that it takes a long time to search for a program if the reproduction position is not known. There is also a problem that there is no way to know in advance the language of the audio and subtitles of the recorded program.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made in view of the above-mentioned circumstances. It is intended to provide a device.

Another object of the present invention is to provide a disk recording apparatus capable of displaying the language of audio and subtitles and selecting the language by a simple operation.

[0014]

According to the present invention, there is provided a disk recording apparatus comprising: receiving means for obtaining a recording stream from input program data; program information obtaining means for obtaining program information relating to the program data; Direct access information creating means for creating information on a direct access point at the time of reproduction based on at least one of program data, the program information, and predetermined setting information; and, based on the program information and the direct access information. The apparatus comprises text information creating means for creating text information, and recording means for recording the program data, and the reproduction information based on the text information and the direct access information on a disk-shaped medium.

In the present invention, at least one of the program data received by the receiving means, the program information acquired by the program information acquiring means, and the predetermined setting information.
The direct access information creating means sets a direct access point based on the two pieces of information. The information relating to the direct access point and the program information are converted into text information by the text information creating means, and are recorded on the disc-shaped medium by the recording means. Thereby, by referring to the text information at the time of reproduction, the text display of the information on the program and the text display on the direct access point can be performed. In addition, reproduction information based on the direct access information is also recorded on the disk-shaped medium, and the reproduction position can be moved to the direct access point during reproduction.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a disk recording apparatus according to the present invention.

A high-frequency digital broadcast signal is induced in the antenna 1. The digital television broadcast signal received by the antenna 1 is supplied to the receiving device 2. A broadcasting station multiplexes a plurality of coded streams obtained by compressing and encoding various data to create a digital TV signal of one stream, and multiplexes the digital stream by a predetermined method to transmit a digital broadcast signal. are doing.

The receiving device 2 selects and demodulates a digital television broadcast signal to extract a specific stream. The receiving device 2 outputs the extracted stream (hereinafter, referred to as a recording stream) to the recording device 3 and also outputs to the CM detection circuit 6 and the text information creating device 5. Also, in the digital television broadcast signal, at the same time or in advance with the program, program information such as a title name, audio, a type of subtitle language, and introduction of performers is also distributed. The receiving device 2 extracts program information related to a recording stream from a digital broadcast signal and outputs the program information to the text information creating device 5.

The CM detection circuit 6 is provided with the recording stream from the receiving device 2, detects a commercial (CM) portion in the recording stream, and sets a commercial period (CM period).
Is set as a direct access (chapter) point. The CM detection circuit 6 supplies the set time code and the like of the direct access point to the reproduction information creation device 7 and the text information creation device 5 as chapter information. Further, the CM detection circuit 6 outputs a recording stop signal indicating the CM period to the recording device 3 so as not to record the CM period.

The reproduction information generation device 7 generates reproduction information necessary for reproduction based on the chapter information and supplies the reproduction information to the recording device 3. For example, the reproduction information creation device 7 creates a recording address table as the reproduction information. The reproduction information indicates the recording position of the chapter point. By recording the reproduction information, the reproduction position can be jumped to the position of the chapter point during reproduction. The reproduction information creation device 7 sets not only the end timing of the CM period but also the recording start timing and the recording end timing as chapter points.

The text information creation device 5 is provided with program information from the reception device 2, chapter information from the CM detection circuit 6, and external information as external input, and based on these information, relates to the program contents and recording stream. Create text information to display various information as text. For example, the text information creating device 5 is adapted to use the DVD specifications for Read-Only Disc Pa
rt 3 VIDEO SPECIFICATIONS Version 1.0 August 1996,
In accordance with the Text Data Manager), an item text identifier code indicating text information indicating program contents is created, and text information including item text, etc., which is individual text corresponding to the item text identifier code, is created. . The text information from the text information creating device 5 is supplied to the recording device 3.

That is, the text information includes character information related to the video signal and the audio signal recorded on the DVD. For example, if the recorded information is a movie, it includes character information indicating a work name, a director name, a leading actor name, and the like, and if the recorded stream is music, indicates a singer name, a composer name, and the like. Contains character information. Further, the text information includes a title indicating the title of the recording stream and text indicating the language of the audio and subtitles in each title.

The text information creating apparatus 5 can also convert information on chapter points from the CM detection circuit 6 into text information. Therefore, the text information from the text information creating device 5 includes information for text display of the title of the recording stream, the language of the audio and subtitles in each title, the direct access point, and the like.

Further, a recording stream is also provided to the text information creating device 5. It is conceivable that chapter information for designating a direct access point is inserted into a broadcast signal. In this case, the text information creating device 5
Can create text information from chapter information in a recording stream.

As described above, the text information creating apparatus 5 can create text information based on at least one of program information, recording stream, external information, and chapter information.

The text information from the text information creating device 5 is supplied to the recording device 3. The recording device 3 records the recording stream from the receiving device 2, the reproduction information from the reproduction information creation device 7, and the text information from the text information creation device 5 at predetermined locations on the disk 4.
The recording device 3 is also provided with a recording stop signal indicating a CM period, and the recording device 3 does not perform recording for a CM.

Next, the operation of the embodiment configured as described above will be described with reference to FIGS.

The digital television broadcast signal received by the antenna 1 is supplied to the receiving device 2. The receiving device 2 extracts a stream based on the user's channel selection operation, and outputs the stream to the recording device 3 as a recording stream. C
The M detection circuit 6 detects the CM period of the recording stream,
The chapter information indicating the end point of the CM period is output to the text information creating device 5 and the reproduction information creating device 7. Also, C
The M detection circuit 6 outputs a recording stop signal indicating the CM period to the recording device 3.

FIG. 2A shows a recording stream from the receiving device 2, and FIG. 2B shows a recording stream recorded on the disk 4. As shown in FIG. 2A, commercials CM1, CM2, CM3 are included in the recording stream.
, ... are included. The CM detection circuit 6 detects each of the CM1, CM2
, CM3,... Are defined as chapter points CP1, CP2,.
CP3, ... The chapter information indicating the chapter point is provided to the reproduction information creation device 7, and the reproduction information is created. The reproduction information enables the position of a chapter point to be specified during reproduction. The reproduction information is also provided to the recording device 3.

The text information creating device 5 includes program information,
Chapter information and external information are supplied. The text information creation device 5 creates text information for displaying various types of information as text based on the input information, and outputs the text information to the recording device 3.

The recording device 3 records a recording stream, text information and reproduction information on a disk 4. In this case, as shown in FIG. 2B, the recording stream in the CM period is not recorded based on the recording stop signal.

It is assumed that the disk 4 recorded as described above is reproduced by a reproducing device (not shown). In this case, the playback device plays back the recorded stream based on the playback information recorded on the disk 4. The playback device supplies the text information reproduced from the disc 4 to a display device (not shown). Thus, a text display based on the text information can be displayed on the display screen of the display device.

For example, the title of the program, the language of the audio and subtitles, the chapter points, and the like can be displayed on the display screen of the display device based on the text information. FIG. 3 shows a screen display of a program title name.

Now, it is assumed that the user desires to view the program of xxx recorded on the disk 4. From the display of the program title name shown in FIG. Perform the operation to select ○○○○. Then,
The playback device detects a playback position for playing back the program of xxx from the playback information based on a user operation, and
Play the recorded stream of XX. Also, the playback device,
The text information about the program OOOO is read, and the text display about the language of the sound and the caption is displayed.

FIGS. 4 and 5 show screen displays in this case. As shown in FIG. 4, it is shown that English, Japanese, and French are used as audios in the program XX, and when the user specifies a number on the screen, the playback device , And perform playback with these sounds. Also, FIG. 5 shows that the caption of the program ○ is performed in Japanese and English. At the time of display in FIG. 5, when the user specifies a number on the screen, the playback device displays subtitles in these languages.

By such a text display, the user can easily grasp the information added to the recording stream.

Further, when the user designates the search mode, the reproducing apparatus reads out text information on the chapter point and displays it in text. FIG. 6 shows a display example in this case. As shown in FIG.
Zero chapter points are set. When the user specifies a desired chapter point, the playback device moves to a playback position indicated by the chapter point and performs playback based on the playback information. This allows the user to move to the desired playback position relatively quickly.

It should be noted that the CM period is not recorded, and only a necessary portion is reproduced at the time of reproduction, and the operation of skipping the CM is unnecessary.

As described above, in this embodiment, the CM of the recording stream is detected, the chapter point is set at the end point of the CM period, and the text information is created based on the program information and the chapter information. Reproduction information and text information based on chapter information are recorded on a disc together with a recording stream. As a result, during playback,
The text display based on the program information and the chapter information can be displayed, and the user can easily grasp the contents of the additional information added to the recording stream and the information of the chapter points. For example, the language of the audio and subtitles of the recorded program can be easily known, and the language can be set by a simple operation. Further, in the search mode, it is possible to move to a desired reproduction position in a short time by a simple operation based on the information of the chapter point.

In the above embodiment, the chapter point at which the CM is detected is set. For example, the chapter point is set at predetermined time intervals based on predetermined setting information regardless of the presence or absence of the CM. You may. Further, it is apparent that a chapter point may be set at an arbitrary position based on a user operation.

FIG. 7 is a block diagram showing another embodiment of the present invention. 7, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. This embodiment is an example in which a chapter point is set for each scene change.

This embodiment is different from the embodiment of FIG. 1 in that a scene change detection circuit 8 is provided in place of the CM detection circuit 6.

The scene change detection circuit 8 detects a scene change of the recording stream, sets the scene change timing to a chapter point, and outputs chapter information indicating the chapter point to the text information creating device 5 and the reproduction information creating device 7. It is supposed to.

In the embodiment configured as described above, since the chapter point indicates a scene change, the reproduction position can be moved for each scene change by the reproduction information recorded on the disk 4. is there.

As described above, also in this embodiment, FIG.
The same effect as that of the embodiment can be obtained.

FIG. 8 is a block diagram showing another embodiment of the present invention. 8, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

This embodiment is different from the embodiment of FIG. 1 in that a chapter information extracting circuit 21 is provided instead of the CM detecting circuit 6.

The chapter information extracting circuit 21 extracts chapter information included in the program information and outputs the extracted chapter information to the text information creating device 5 and the reproduction information creating device 7.

In the embodiment configured as described above, it is possible to jump the reproduction position based on the chapter point included in the program information.

As described above, also in this embodiment, FIG.
The same effect as that of the embodiment can be obtained.

FIG. 9 is a block diagram showing another embodiment of the present invention. 9, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

The stream output from the receiving device 2 is obtained by time-division multiplexing a plurality of streams. In the embodiment of FIG. 1, an example has been described in which all of the multiplexed streams from the receiving device 2 are recorded. The present embodiment is an example in which the present invention is applied to a case where only a selected stream among a plurality of time-division multiplexed streams from the receiving apparatus 2 is recorded.

This embodiment differs from the embodiment of FIG. 1 in that a demultiplexer 31, an audio stream selecting device 32 and a multiplexer 33 are added. The demultiplexer 31 demultiplexes the stream from the receiving device 2, separates the streams into respective streams, and outputs the streams to the audio stream selecting device 32.

The audio stream selection device 32 selects an audio stream based on a user operation, for example, for a plurality of audio streams among the input streams. That is, the audio stream selection device 32
When there are two or more audio streams, one or more necessary audio streams are selected from among them. For example, if there are audio streams in English, Japanese, and French, for example, English and Japanese streams are selected based on a user operation.

The multiplexer 33 multiplexes the video stream, audio stream and other streams output from the audio stream selection device 32 to generate a system stream and outputs it as a recording stream. This recording stream is supplied to the recording device 3, the text information creating device 5, and the CM detection circuit 6.

In the embodiment configured as described above, the received stream is separated into a video stream, an audio stream, and other streams by the demultiplexer, and supplied to the audio stream selection device 32. The user selects a stream to be recorded from a plurality of audio streams. The audio stream selection device 32 selects one or more audio streams based on a user's selection operation, and outputs the selected audio stream together with the video stream and other streams.

Each of these streams is multiplexed by the multiplexer 33 and output as a recording stream. Also in this case, the CM detection circuit 6 detects the CM of the recording stream. The recording stream is also supplied to the text information creating device 5, and the text information creating device 5 uses the program information and the recording stream to
The language of the audio included in the recording stream is determined, and text information indicating the language of the audio is created.

Other functions are the same as those of the embodiment shown in FIG.

In this embodiment, the same effects as in the embodiment of FIG. 1 can be obtained. Further, in the present embodiment, only the sound desired by the user can be recorded on the disc, and the amount of data written to the disc can be reduced.

FIG. 10 is a block diagram showing another embodiment of the present invention. 10, the same components as those in FIG. 9 are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, the audio stream selecting device 3
This embodiment differs from the embodiment of FIG. 9 in that a subtitle stream selection device 35 is used instead of the subtitle stream selection device 2. Subtitle stream selection device 3
5 is configured to select a subtitle stream based on a user operation, for example, for a plurality of subtitle streams among the input streams. That is, when there are two or more subtitle streams, the subtitle stream selection device 35 selects one or more necessary subtitle streams from the subtitle streams. For example, if English, Japanese, and French subtitle streams exist,
For example, select English and Japanese streams.

In the embodiment configured as above, the received stream is separated into a video, audio stream, subtitle stream and other streams by the demultiplexer, and the subtitle stream selection device 35
Supplied to The user selects a stream to be recorded from a plurality of subtitle streams. The subtitle stream selection device 35 selects one or more subtitle streams based on a user's selection operation, and outputs the selected subtitle stream together with the video, audio stream, and other streams.

Each of these streams is multiplexed by the multiplexer 33 and output as a recording stream. Also in this case, the CM detection circuit 6 detects the CM of the recording stream. The recording stream is also supplied to the text information creating device 5, and the text information creating device 5 uses the program information and the recording stream to
The language of the subtitle included in the recording stream is determined, and text information indicating the language of the subtitle is created.

Other functions are the same as those of the embodiment shown in FIG.

In this embodiment, the same effects as in the embodiment of FIG. 1 can be obtained. Further, in the present embodiment, only subtitles desired by the user can be recorded on the disc, and the amount of data written to the disc can be reduced.

In the embodiments shown in FIGS. 9 and 10, an example has been described in which the recording start point and the end point of the CM period are set as chapter points. However, it is apparent that the scene change point may be set as the chapter point. is there.

Further, in each of the above embodiments, the direct access point can be set and changed by a user operation during or after recording.

In each of the above embodiments, an example has been described in which a digital television broadcast signal is received. However, it is apparent that the present invention can be applied to a case in which an analog broadcast is received. When receiving an analog television broadcast, a broadcast signal of a specific channel is selected, separated into a video signal and an audio signal by a video / audio separator, each signal is compression-encoded, and each compression code is encoded. A system stream that is packetized and multiplexed in a predetermined unit is adopted.

Further, the data created by the text information creating device 5 is recorded on the disc after the recording of the system stream is completed. However, if the creation of the text information is completed by the data distributed in advance, the data is created in advance or simultaneously. Recording may be performed.

In each of the above embodiments, an example has been described in which a television broadcast signal is received.
The present invention can be applied to a case where a reproduction signal or the like from a recording / reproducing device is input, and an arbitrary video input can be adopted as the input.

[0071]

As described above, according to the present invention, at the time of reproduction, a user can display a desired reproduction position and can move to the reproduction position by a simple operation. Has the effect that the language can be displayed and the language can be selected by a simple operation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a disk recording device according to the present invention.

FIG. 2 is an explanatory diagram illustrating an embodiment.

FIG. 3 is an explanatory diagram for explaining a text display during reproduction.

FIG. 4 is an explanatory diagram for explaining text display during reproduction.

FIG. 5 is an explanatory diagram for explaining text display during reproduction.

FIG. 6 is an explanatory diagram for explaining text display during reproduction.

FIG. 7 is a block diagram showing another embodiment of the present invention.

FIG. 8 is a block diagram showing another embodiment of the present invention.

FIG. 9 is a block diagram showing another embodiment of the present invention.

FIG. 10 is a block diagram showing another embodiment of the present invention.

FIG. 11 is a block diagram showing a conventional disk recording device.

FIG. 12 is a block diagram showing a conventional disk recording device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Antenna, 3 ... Recording device, 4 ... Disk, 2 ... Receiving device, 5 ... Text information creation device, 6 ... CM detection circuit,
7. Playback information creation device.

Claims (7)

[Claims] A receiving unit that obtains a recording stream from the input program data; a program information obtaining unit that obtains program information related to the program data; A direct access information creating unit that creates information about a direct access point at the time of reproduction based on at least one piece of information; a text information creating unit that creates text information based on the program information and the direct access information; A disk recording apparatus, comprising: recording means for recording data, text information, and reproduction information based on the direct access information on a disk-shaped medium. 2. The direct access information generating means sets the direct access point at a commercial period included in the program data, a scene change of the program data, or at a predetermined interval.
A disk recording device according to claim 1. 3. The disk recording apparatus according to claim 1, wherein the direct access information creating unit sets a recording start point of the recording unit to the direct access point. 4. The disk recording apparatus according to claim 1, wherein said direct access information creating means sets said direct access point based on a user operation. 5. The disk recording apparatus according to claim 1, wherein the recording unit stops recording the program data during the commercial period. 6. The program information includes information about a language of audio and subtitles included in the program data, and the text information creating unit includes at least one of information about the language of the audio and subtitles. 2. The disk recording apparatus according to claim 1, wherein text information is created for the information. 7. The apparatus according to claim 1, wherein the receiving unit selectively outputs only a stream of a specified language as the recording stream for at least one of audio and subtitles included in the program data. Disk recorder.