JP2000173183A - Disk recording and reproducing device and disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly reproduce original audio data by formatting dummy audio sectors, which are made independent from audio sectors, in a disk format and recording new audio data in the dummy audio sectors while conducting an additional recording of the new data. SOLUTION: When recording first audio data, eight sectors of a first half of audio data blocks are arranged, for example and dummy audio sectors are arranged in the remaining eight sectors to record dummy data. When new audio data are additionally recorded into DVD video disk 6, the audio signals are transmitted to a DVD/DSP 4 through an A/D converter 1A and an MPEG encoder 2A, the first half eight sectors of the audio data blocks are untouched and the data are arranged in the dummy audio data sectors. Then, the data are transmitted to the disk 6 through an HP/LSI 5 and recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recordable / reproducible D
The present invention relates to a disk recording / reproducing device for a VD (digital video disk, digital versatile disk) and a disk reproducing device.

[0002]

2. Description of the Related Art In general, a DVD-format digital video disc includes, in addition to video data encoded in MPEG2 format, audio data encoded in MPEG format or Dolby Digital format, or audio data in linear PCM, Subtitle data for displaying subtitles and navigation data for controlling the playback order of the player are recorded. In the video data sector and the audio data sector, each data is interleaved and recorded at a ratio corresponding to the size of the entire data.

A DVD player reads navigation data together with audio, video, and sub-picture data during playback, and a microcomputer accesses a data position on a disk to be read next by a disk reader in accordance with a playback order in the navigation data. Let it. Therefore, in order to create navigation data, it is necessary to know the data position on the disk.

A recordable and reproducible DVD in which video data and the like are recorded together with navigation data
If an attempt is made to additionally record (so-called post-recording) audio data or the like on a video disc, the recorded data increases, and accordingly, it is necessary to rewrite the navigation data. Further, even in the case of partially additional recording, it is necessary to rewrite all data thereafter.

[0005]

Problems to be solved by the invention (1) However,
In order to record additional audio data so as not to shift the recording position of the navigation data, the recording data cannot be increased, so the original audio data has to be rewritten.Therefore, the original audio data can be reproduced again. There is a problem that it disappears. In addition, it is convenient if the audio can be mixed with the original audio data and additionally recorded to selectively reproduce the original audio data or the mixed signal (first problem).

(2) In addition, video data sectors and audio data sectors are interleaved, and in the case of a DVD video disk, one block has an EC of 16 sectors.
Because of the C configuration, in order to additionally record audio data, it is necessary to read and rewrite all the blocks including the audio data sector, which requires a large-capacity memory and a fast rewriting processing speed. . There is also a problem that rewriting one sector causes an ECC error.

(3) In the case of a DVD video disc dedicated to reproduction, reproduction according to time information recorded in a stream is required, but it is not necessary to reproduce all streams at high speed. For example, there is known special reproduction in which a stream is finely cut by an operation such as scanning to reproduce the stream. In the case of a read-only DVD-ROM disc, since it is considered to be a data file instead of a playback stream, a function of sending data at high speed is necessary, but it is not necessary to decode and display it. On the other hand, a DVD video disk player capable of recording and reproduction requires a dubbing mode for performing high-speed copying. However, conventional players cannot send out all streams,
There is a problem that video data during dubbing cannot be displayed (second problem).

(4) Generally, in a video tape recorder with a built-in camera, the following two types 1 and 2 are known as methods for recording recording information such as shooting date and time on a magnetic tape as a recording medium. Method 1. As shown in FIG.
Is superimposed by adding A / D conversion and encoding to the video signal of the moving image, and recorded on the magnetic tape 20 as a moving image. Method 2. As shown in FIG. 9, character information such as a three-word (24-bit) number is recorded in a sub-code area different from the video signal area on the magnetic tape 20 by the VSC (video sub-code) method. The character image generated by the character generator 21 is added to the reproduced moving image based on the character information.

However, method 1. In the case of, recording can be performed in any format or typeface, but if character information is recorded at the time of shooting, the character information is always displayed at the time of reproduction, which may be annoying. Method 2. In the case of, the type of recording information (time code, photographing date, photographing time) can be selected and displayed at the time of reproduction, but can be displayed only in a fixed format and typeface. By the way, a camera-integrated video recorder tends to convert a recording medium from a magnetic tape 20 to an optical disk such as a DVD that can be recorded and reproduced. It is convenient for the user (third problem).

In view of the above-mentioned first problem, the present invention can normally reproduce the original audio data even if the audio data is additionally recorded, and further, a signal obtained by mixing audio with the original audio data. To provide a disk recording / reproducing apparatus capable of selectively reproducing the original audio data or the mixed signal by additionally recording the audio data.
The purpose of. In view of the second problem, it is a second object of the present invention to provide a disk reproducing apparatus capable of displaying video data during dubbing. In view of the third problem, the present invention can record character image information such as a shooting date and time in a free format and typeface, and can select and display the type of character image information during reproduction. A third object is to provide a disk recording and reproducing apparatus.

[0011]

SUMMARY OF THE INVENTION In order to achieve the first object, the present invention provides a method for formatting a dummy audio data sector independent of an audio data sector into a disk format and additionally recording new audio data. This is recorded in a dummy audio data sector. That is, according to the present invention, the audio data stream and the video data stream to be recorded are divided into blocks, and the data is formatted in conformity with the disk format for recording these data. Formatting means for outputting a formatted data stream obtained by performing formatting for recording dummy data so that new audio data can be additionally recorded therein, and a formatted data stream output from the formatting means. Recording means for recording each block of audio data and each block of video data on the disc, and rewriting the recording portion of the dummy data with new audio data; To have been recorded, already reproducing means for selectively reproducing the recording audio data and the dummy data portion additionally recorded audio data, the disk recording and reproducing apparatus having is provided.

According to the present invention, in order to achieve the second object, video data for display is generated by thinning out video data read at the time of dubbing. That is, according to the present invention, in the dubbing mode, video data and audio data recorded on the disc are read out at a higher speed than during normal reproduction, and the video data read out by the reading means is thinned out to display video data. And a means for generating data.

According to the present invention, in order to achieve the third object, character image information such as the date and time when video data was shot is recorded as a sub-picture in a disk format. That is, according to the present invention, means for converting character image information such as the shooting date and time of video data into sub-pictures in a disc format, recording means for recording the sub-pictures together with video data on a disc, and recording on a disc during reproduction Means for converting the sub-picture into character image information and outputting it as a video signal.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of a disk recording / reproducing apparatus according to the present invention, and FIG.
FIG. 3 is an explanatory diagram showing a VD format, FIG. 3 is an explanatory diagram showing a DVD format in which new audio data is recorded,
FIG. 4 is an explanatory diagram showing a DVD format in which a mix signal is recorded as new audio data.

In FIG. 1, an analog video signal and an audio signal for recording are respectively supplied to an A / D converter 1.
V, 1A, and the digital video and audio signals are then converted to MP
MPEG encoding and compression are performed by the EG encoders 2V and 2A. Next, the compressed video data and audio data streams are supplied to a DVD / DSP under the control of a microcomputer (microcomputer) 3.
(Digital signal processor) 4 formats the data into the DVD format shown in FIG.

In this format, one block is composed of 16 sectors, and video data and audio data are independently arranged in each block. Audio data is recorded in units of one block, and video data is recorded in units of a plurality of blocks. That is, no video data is arranged in the audio data block. Then, as shown in FIG. 3, when the first audio data is recorded, for example, the audio data block is arranged in the first eight sectors, and the remaining eight sectors are arranged with dummy audio sectors in which dummy data is recorded. The number of dummy audio sectors may be the same as or a multiple of the number of sectors for recording the first audio data. The audio data stream and the video data stream of such a format are converted into RF-L under the control of the microcomputer 3.
The data is modulated by the SI 5, converted into a formatted data stream, and recorded on the DVD video disk 6.

At the time of reproduction, the information recorded on the DVD video disk 6 is read, demodulated by the RF LSI 5, and then deformatted by the DVD DSP 4. Then, the data is expanded by an AV (audio / video) decoder 7 to restore video data and audio data. The video data is converted into an analog video signal by a video encoder 8, and the audio data is converted into an analog audio signal by a D / A converter 9. Is done.

When new audio data is additionally recorded on such a DVD video disk 6, this audio signal is sent to the DVD / DSP 4 via the A / D converter 1A and the MPEG encoder 2A, and the DVD / DSP 4 shown in FIG.
As shown in (1), the first eight sectors of the audio data block are arranged as dummy audio data sectors. Then, this data is sent to the DVD video disk 6 via the RF LSI 5 and recorded.

When the audio is mixed with the original audio data recorded on the DVD video disc 6 and recorded on the DVD video disc 6, the DVD
The original audio data of the audio data block on the video disk 6 is RF LSI 5, DVD DSP
4, output via the AV decoder 7 and the D / A converter 9 and mixed with the audio signal. Then, this mixed signal is converted into an A / D converter 1A, an MPEG encoder 2
The data is sent to the DVD / DSP 4 via A, and is arranged in dummy audio data sectors while the first eight sectors of the audio data block remain as shown in FIG. Then, this data is transmitted to the DV via the RF / LSI5.
It is sent to the D video disc 6 and recorded.

FIG. 5 shows a second embodiment of a disk recording / reproducing apparatus capable of dubbing. When dubbing the information recorded on the DVD video disk 6 to another recording medium, for example, a disk, the stream of the video data block and the audio data block on the DVD video disk 6 is RF / LSI 5, as shown in FIG. DVD ・
The data is sent to another disk via the DSP 4 and the buffer 10. At this time, the video data stream on the buffer 10 is thinned out, and the AV decoder 7 and the video encoder 8
And is displayed on the monitor.

FIG. 6 shows a third embodiment of a disk recording / reproducing apparatus capable of recording character information. A character generator 21 and a sub-picture encoder 22 are added to the configuration shown in FIG. The character generator 21 converts character information such as a shooting date and time input from a character input unit (not shown) into character data, and the sub-picture encoder 22 converts this into character data.
And converts it into sub-picture data under the control of. Then, the DVD / DSP 4 converts the sub-picture data into a DVD based on the control of the microcomputer 3.
The video data and audio data from the MPEG encoders 2V and 2A and the sub-picture data are formatted into a video data sector, an audio data sector, respectively, as shown in FIG.
DVD by locating in sub-picture data sector
It is recorded on the video disk 6.

At the time of reproduction, the sub picture data recorded on the DVD video disk 6 together with the video data sector and the audio data sector are RF / LSI 5, D
The data is sent to the AV decoder 7 via the VD / DSP 4 and is superimposed on the video data and output.

According to the DVD standard, the sub-picture is 32
Since it can record up to the types, the time code recorded by the camera-integrated video tape recorder,
Not only can the shooting date and shooting time be recorded, but also sentences such as shooting location information and shooting memos can be recorded. Also, since sub-pictures are recorded by compressing graphics, not only characters but also graphics can be recorded,
Therefore, handwritten characters and pictures can also be recorded.

[0024]

As described above, according to the present invention, a dummy audio data sector independent of an audio data sector is formatted into a disk format, and is recorded in the dummy audio data sector when new audio data is additionally recorded. So,
Even if additional audio data is recorded, the original audio data can be normally reproduced.In addition, a signal obtained by mixing audio with the original audio data is additionally recorded, and the original audio data or mixed signal can be selectively selected. Can be played. According to the present invention, video data for display is generated by thinning out video data read at the time of dubbing, so that dubbing video data can be displayed. Further, according to the present invention, the character image information such as the shooting date and time of the video data is recorded in the sub-picture of the disc format, so that the character image information such as the shooting date and time can be recorded in a free format and typeface. In addition, the type of character image information can be selected and displayed at the time of reproduction.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a disc recording / reproducing apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing a DVD format.

FIG. 3 is an explanatory diagram showing a DVD format in which new audio data is recorded.

FIG. 4 is an explanatory diagram showing a DVD format in which a mix signal is recorded as new audio data.

FIG. 5 is a block diagram illustrating a disk recording / reproducing apparatus according to a second embodiment.

FIG. 6 is a block diagram illustrating a disk recording / reproducing apparatus according to a third embodiment.

FIG. 7 is an explanatory diagram showing a DVD format by the disc recording / reproducing apparatus of the third embodiment.

FIG. 8 is a block diagram showing a camera-integrated video tape recorder as a conventional example.

FIG. 9 is a block diagram showing another camera-integrated video tape recorder as a conventional example.

[Explanation of symbols]

3 microcomputer (microcomputer) 4 DVD / DSP (formatting means, recording means,
Playback means, readout means, sub-picture output means) 6 DVD video disk 10 buffer (video data generation means) 21 character generator (DVD / DSP 4, sub-picture encoder 22 and sub-picture recording means) 22 sub-picture encoder

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Taku Umezono 3-12-12 Moriyacho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Inside of Victor Company of Japan, Ltd. (72) Tomio Mineo 3-chome Moriyacho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture No. 12 Inside Victor Company of Japan, Ltd. (72) Hideaki Yamagami, Inventor 3-chome Moriyacho, Kanagawa-ku, Yokohama, Kanagawa Prefecture No. 12 Inside Victor Company of Japan, Ltd. (72) Kenji Tsuge 3-chome, Moriyacho, Kanagawa-ku, Yokohama, Kanagawa Prefecture 12 Japan Victor Co., Ltd. (72) Inventor Yasuo Ito 3-12 Moriyacho, Kanagawa-ku, Yokohama, Kanagawa Prefecture F-term (reference) 5C053 FA15 FA24 GB05 GB11 GB37 JA01 JA16 KA24 KA25 LA04 LA05 LA06 5D044 AB05 AB07 AB09 BC06 CC04 DE02 DE03 FG24 GK08 GK11 HL04 HL07

Claims (3)

[Claims] 1. An audio data stream and a video data stream to be recorded are divided into blocks and formatted in accordance with a disk format for recording these data, and each audio data is recorded in each block. Formatting means for outputting a formatted data stream obtained by performing formatting for recording dummy data so that new audio data can be additionally recorded, and outputting a formatted data stream output from the formatting means to audio. Recording means for recording data blocks and video data blocks on the disc, and rewriting the recording portion of the dummy data with new audio data; It is to have, already reproducing means for the recording audio data and the dummy data portion additionally recorded audio data selectively reproduced, the disk recording and reproducing apparatus having. 2. A reading means for reading video data and audio data recorded on a disc in a dubbing mode at a higher speed than in normal reproduction, and thinning out the video data read by the reading means to produce video data for display. Means for generating a disc. 3. A means for converting character image information such as shooting date and time of video data into a sub-picture in a disc format, a recording means for recording the sub-picture together with the video data on a disc, and a sub-picture recorded on the disc during reproduction. Means for converting a sub-picture into character image information and outputting it as a video signal.