JPH07236116A - Optical disk reproducing device, optical disk recording method and optical disk to be used therefor - Google Patents

Abstract

PURPOSE:To make it possible to read out a moving picture from a prescribed position by previously recording address data to be reproduced as a chapter in a moving picture user file regulated by a motion picture export group standard and reading out the recorded data to reproduce the chapter. CONSTITUTION:A main controller 21 receiving a reproducing command from a commander 32 or an operation part 33 applies a prescribed command to an auto-changer controller 20 to set up a prescribed video CD on a CD player 19 and start reproducing. Reproduced data are applied to a CD-ROM decoder 22 and a reproducing start status signal is applied to the controller 21 so as to allow a video CD reproducing controller 24 to start the decoding of CD data. The decoder 22 decodes the applied data to the data of each byte corresponding to a CD-ROM format and writes the decoded data in a RAM 23 and a controller 24 separates the written data into audio and video data, which are respectively supplied to a video decoder 25 and an audio decoder 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc in which reference information data, moving image data and audio data are compression-encoded and recorded, and a recording method for the optical disc, and the reference information data recorded in the optical disc is read from the optical disc. In particular, the present invention relates to a video CD used as an optical disk, a method of recording chapter data on the video CD, and a video CD reproduction apparatus configured to read chapter data from the video CD.

[0002]

2. Description of the Related Art Conventionally, a standard for multiplexing a compressed stream obtained by highly efficient encoding (compression encoding) moving image data and audio data (hereinafter referred to as video and audio streams) and another stream is MPEG.
1 (Motion Picture Exports Group 1). In this MPEG1, the video stream is highly efficient compression coded by motion compensation inter-frame prediction, orthogonal transform (DTC), variable length coding (Huffman coding), etc. to obtain a high compression rate. Data of 100 Mbps or more of the moving image is compressed to a low rate of 1 to 1.5 Mbps.

In addition, an audio stream has a proper compression rate by sub-band (band division) coding and adaptive bit allocation utilizing auditory characteristics, or by combining sub-band coding, orthogonal transformation and variable length coding. It has gained.

Further, in order to multiplex the above-mentioned video stream and audio stream and other reference information data, one pack (PACK) is composed of a plurality of packets (PACKET) and starts at each packet and the head part of the packet. Coded, reference clock, transfer rate and start code, stream type, bucket data length, input buffer size, playback start time, decode start time, and other recorded pack header and packet header are provided, and video and audio are included in the packet. The stream is designed to be recorded.

A video stream and an audio stream of a moving image according to the MPEG1 standard as described above are recorded on a CD.
There has been proposed a standard of a video CD which is composited into, for example, applied to a CD digital moving image karaoke, and reproduces a moving image from a video stream in which a karaoke image is compression-encoded.

FIG. 6A shows the structure of this video CD. 1 is a lead-in similar to a normal CD, and the start time (TOC: Tabl) of each track is recorded in the subcode channel PQ.
e of contents) is recorded, which enables system construction with a PQ search system player. Lead-in position is C
It is provided at the innermost circumference of D. Normally, in the P channel in the subcode, the interval between music (Pause) is indicated by 1, and in the Q channel, control data, address data, 72
The bit number and CRC data are included, and the song number (TNO), elapsed time in the movement, absolute time, etc. are recorded in the 72-bit data so that it is possible to immediately find out what movement of the music. ing.

Next Volume Descriptor Dirctory files 2
Is a bus table / directory file conforming to the ISO (International Organization for Standardization) -9660 file format.

After the data 2 of such a file structure format
Are the song names and singers that are indispensable for karaoke
Quick reference related text data such as name, composer, intro lyrics, etc.
Data is recorded. This karaoke standard information data
(KARAOKE Basic Information Area) 3 is shown in Fig. 6B.
The file called "KARINFO.BHI" 3a
“KAR” consisting of files and multiple code text files
INFO. cc "3b, 3c ... 3 _{n + 1}Called fa
It is made of il.

The extension of this code text file
"Cc" is the country and code, for example, KA RINFO.
_jpShows Japan.

After such karaoke standard information data 3, a CD-I application program and a related file 4 for achieving a bridge with a CD-I / FMV player are recorded.

After the CD-I application, the track numbers 02 to 99 (1 to n in FIG. 6A) are MPEG.
An audio stream and a video stream according to one standard are recorded, and are composed of recorded karaoke moving images and tracks for the number of songs. The sector has a mode 2 / form 2 having the same structure as the CD-ROM sector.

The main specifications of the above-mentioned MPEG1 audio and video streams are II for the audio stream, the player II, the sampling frequency 44.1 kHz, the bit rate 224 kbps, and the emphasis characteristic off / on.
On, mode is stereo, dual, and intensity stereo, main specifications of video stream are horizontal frequency 352 pixels, line number 240/288 lines: N
TSC / PAL, frame rate 23.976 / 25
/29.97 Hz, VBV buffer size, 40 Kbytes, bit rate is about 1.5 Mbps. A full-size moving image conforming to the MPEG1 standard and an audio signal of sound quality equivalent to a CD can be recorded and reproduced for 74 minutes on a 12 cm diameter CD.

Reference numeral 6 denotes a lead-out, which has the same sector structure as that of the lead-in 1 of a CD-ROM.

[0014]

When the above-mentioned conventional video stream and audio stream 5 are multiplexed, as shown in FIGS. 7A and 7B, the CD-R is used.
One sector of the OM handles one pack and one packet as a reference, and includes a pack header 5a, a packet header 5b, and packet data 5c. One pack consists of only video or audio in packets. The sector occupancy of the compressed video stream and the audio stream 5 is equal to the code amount ratio, and one audio sector is allocated every 5 to 6 sectors.

High efficiency coded video as described above and
When playing the audio stream 5, these
Video and audio streams (V ₁, V ₂‥‥‥
V _n) This is read from the beginning of 5 and read
Packet data according to the MPEG1 standard.
So that it can be played back after being converted to moving images and audio signals.
Was made in.

That is, in the case of the audio signal of a video CD conforming to the above-mentioned MPEG1 or the like, if it is desired to hear from a movement in the middle, the song number can be randomly accessed using the PQ channel of the sub-third, but it is a video stream. In terms of moving images, the video stream can always reproduce data only from the beginning. Therefore, there is a problem that the chapter display that is generally performed on a laser disk or the like cannot be performed. This chapter is a chapter number corresponding to a "chapter" of a book or the like, and a frame number corresponding to a page is expressed as an elapsed time from the beginning of the program.

As described above, a video disc is rarely randomly searched especially in karaoke or the like, but when used in a flight simulation as a game using a natural moving image, a car race, a golf, or the like, naturally chapter reproduction is often performed. There was a problem I needed.

The present invention has been made in order to solve the above-mentioned problems, and its purpose is to place a video stream 5 which is highly efficient code-compressed in accordance with MPEG in an appropriate position (for example, in units of chapters). ), An optical disk reproducing apparatus and an optical disk recording method, and an optical disk used therefor are provided.

[0019]

DISCLOSURE OF THE INVENTION Optical disk reproduction of the present invention
The device, as an example of which is shown in FIG.
In addition, an optical disc that records audio data with high efficiency encoding
And video and audio data of this optical disc
Code text provided in the standard information area other than the recording area of
The moving image data can be played back from the appropriate position in the file
The position data is recorded on the optical disc.
Position data reading means ST for reading the data ₁Equipped with
This position data reading means ST ₁Through the light de
Playback ST of moving image data recorded in data from appropriate position _Five
It was made to do.

The recording method of the optical disc of the present invention is such that reference information different from the moving image data and acoustic data recording area of the optical disc, in which the recording is performed by highly efficient encoding as shown in FIG. The reference information data recorded in the code text file in the data recording area is composed of each chapter file data of the moving image data.

As shown in FIG. 3, the optical disc of the present invention records moving image data and sound data by high efficiency coding and records reference information different from the recording area of the moving image data and sound data. Each chapter file data of moving image data is recorded in the code text file of the area.

[0022]

According to the first aspect of the present invention, the chapter address describing the character of the video and audio streams is recorded in the user file of the text file in the karaoke standard information recording data area of the optical disk separately from the video and audio streams. However, since this chapter address is played back, a playable one can be immediately obtained from an appropriate position in the video stream (for example, the Nth position), and a predetermined moving image position can be quickly found and played back. The device can be provided.

According to the second aspect of the present invention, the chapter file data is recorded in the user bit file in the code text file different from the highly efficient encoded compressed video stream conforming to the MPEG standard. Therefore, it is possible to obtain an optical disc recording method and an optical disc that can be randomly accessed from an appropriate position of moving image data without changing the recording format or the like.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk reproducing apparatus and an optical disk recording method according to the present invention and an optical disk used therein will be described below.
An embodiment will be described with reference to FIGS. First, the code text files 1 to n (hereinafter referred to as KARINFO.cc files) 3b to 3n _{+ 1} in the karaoke reference data 3 described with reference to FIGS. 6A and 6B will be described in detail with reference to FIGS. 3A to 3C and FIG.

That is, KARINFO. cc file is M
Data (hereinafter referred to as MU) written in tracks 2 to 99 (1 to n) as the PEG video and audio stream 5.
SICnn. A DAT file) is a text file that represents the character of the file and is a single KARINFO. cc is composed of groups O to N as shown in FIG. 3A,
MUSICnn. Each 1 group 6a in one of the DAT file, though 6b ‥‥ 6 _{n + 1} is assigned, a group O disk item indicated by 6a, Group 1~N sequence # 1 item indicated by 6b~6 _{n + 1} ~ Sequence #N item is shown.

As shown in FIG. 3B, each group 1 to N includes a header indicating a group length 7 and a plurality of item packets 8 ₀ to.
It is composed of 8 ₂₂ to 8 ₆₃ .

Each item packet 8 ₀ shown in FIG. 3B
8 _{22-8 63} and header representing the item packet number 9 as shown in FIG. 3C, a file indicating the item packet length 10, text data 11 up to 254 bytes is made possible recording, each item packet 8 ₀ ~ 8 ₂₂ ~ 8
₆₃ has a meaning as shown in FIG. 4 according to each item number 9. As shown in the table of contents for item packet numbers 0 to 63, M is Mandatory and O is optional.
The item packet numbers ₀ to ₂₁ 8 ₀ to 8 ₂₁ are related to the quick reference table such as the composer name, and the item packet numbers ₂₂ to ₃₁ 8 ₂₂ to 8 ₃₁ are freely used by the user. A possible user file portion, 832 to 863 of the item packet numbers ₃₂ to ₆₃ are reserve (reserved) files.

In this example, such an item packet number 2
The present invention intends to obtain an optical disk reproducing apparatus and an optical disk recording method capable of recording chapter file data in the No. 2 to No. 31 text data 11 and randomly reproducing from a predetermined position of a moving image, and an optical disk used for these.

An example of a format for writing a chapter file in the optical disc and the optical disc recording method of this example will be described with reference to FIG.

FIG. 5 shows a chapter file format written in the text data 11 of the _22nd to _31st item packets 8 ₂₂ to 8 ₃₁ of the user format of FIG. 3B.

That is, each item packet 8 ₂₂ to 8 ₃₁ includes an item number 9, an item length 10 and a text file 11 'as shown in FIG. 3C.
In the 1 ', M at the beginning of the text file 11' as shown in FIG.
USICnn. The total number of chapters 13 of the data recorded in DAT is recorded. The following code shows the address 14 of each chapter. Address is 3 minutes, seconds, and frames
It consists of one data, and the data in the address is separated by ":", and the total number of chapters 13 and the start address and the data between each chapter start address are separated by ",". At the end, an EOF (End of file) code 15 is recorded.

In the example of FIG. 5, it is shown that the total number of chapters is 12, the start address of chapter 1 is 5 minutes 30 seconds 16 frames, and the second chapter is 5 minutes 56 seconds 0 frames .... . The total number of chapters and chapter addresses will be MPEG audio and M audio after the master tape is completed at the software production stage.
The PEG video encoder encodes the audio and video streams and compresses them with high efficiency, then records them in the text data as karaoke dedicated data in the premastering stage, multiplex processing, ROM
Formatting or the like is performed to create a video CD cutting mask for a moving image to manufacture a video CD.

A system diagram of an optical disk reproducing apparatus using an optical disk (video CD) obtained by such an optical disk recording method will be described with reference to FIG.

FIG. 2 shows such a video CD reproducing apparatus. In the figure, 16 is a changer unit, 17 is a main controller unit, and 18 is a monitor unit.

The changer unit 16 is composed of a CD player 19 for a changer and an autochanger controller 20, and is installed independently of the main controller unit 17.

Autochanger controller (hereinafter A-
CPU 20) controls the autochanger function of the CD player for the changer, various servos of the optical pickup, video and audio streams with high code efficiency, and reading of chapter file data recorded in the karaoke reference information recording area. A main controller (hereinafter referred to as M-CPU) 21 including a computer included in the main controller unit 17 is connected via a bus.

In the main controller section 17, M-CP
In addition to U21, it has a video CD playback controller 24, and this video CD playback controller (hereinafter, P-CPU
24) CD-ROM decoder 22, RAM2
3, and controls the MPEG video decoder 25 and the MPEG audio decoder 26. That is, the commander 32
Alternatively, an M which receives a reproduction command from the operation unit 33 such as a ten-key pad
-When the CPU 21 gives a predetermined command command to the A-CPU 20, the A-CPU 20 selects a predetermined video CD, mounts the predetermined video CD on the CD player 19, and starts reproduction. The reproduced CD data is given to the CD-ROM decoder 22 via an EFM decoder (not shown and included in the CD player 19), and when a reproduction start status signal is given to the M-CPU 21, the M-
The CPU 21 gives a command for starting decoding of CD data to the P-CPU 24.

The CD-ROM decoder 22 is a CD-ROM
After decoding into 1-byte unit data according to the format, this decoded data is written in the RAM 23. Since the P-CPU 24 is also configured to control the writing and reading of the RAM, when the predetermined data is stored, it is separated into audio data and video data and supplied to the MPEG video decoder 25 and the MPEG audio decoder 26.

The MPEG video decoder 25 and the MPEG audio decoder 26 are controlled by the P-CPU 24 and decoded into video and audio signals,
The video signal is displayed on the display device 29 such as a CRT via the video amplifier 27, and the audio signal is output by the power amplifier 2.
Sound is emitted from the left and right speakers 30 via 8. In this example, a karaoke mixing circuit from a microphone and the like are omitted.

In the above-mentioned moving picture CD reproducing apparatus, the commander 32
Alternatively, the operation unit 33 is provided with chapter keys. A predetermined chapter can be specified by operating this key and the ten-key pad.

For example, while reproducing a moving image, the chapter 11
If the commander 32 gives an instruction, the M-CPU 21
Give a video instruction command to the controller 20
It The A-CPU 20 is a karaoke standard information device for video CDs.
The code text file described in FIG. 6B in the data area 3
Le 3b-3 _{n + 1}That is, KARINFO. cc file
First step ST in FIG. ₁Lead as shown in.

Next second step ST ₂A-CPU20
Is the KARINFO. cc file
22 item packet to 31 item packet 8 _{twenty two}
~ 8₃₁From the text data 11 of
Read the file.

Next third step ST ₃ These texts
Specified from the chapter file of data 11
The start address of chapter 11 is acquired. In Figure 5,
The address of PT 11 is 7 minutes 4 seconds 56 frames.
Of the specified chapter number and the acquired start address
The comparison is the software in the A-CPU20 (or M-CPU21)
Software, but what you can do with hardware is
it is obvious.

Fourth step ST _Four Then, for example, the specified chapter
For example, read data from the start address of chapter 11.
To start. For this purpose, the A-CPU 20 to the M-CPU
21 based on the data transferred to the M-CPU 21?
The reproduction start data is sent to the P-CPU 24.

Next fifth step ST _Five Then chapter 11
MPEG video stream, that is, MUSCn
n. The reproduction of DAT is performed via the MPEG video decoder 25.
Will be performed.

Next sixth step ST ₆ Then MUSCn
n. Play MPEG video until DAT file ends
Go to the end if not done
Fifth step ST _Five To repeat the flow to return to
It These flows are based on the command of M-CPU21.
Will be performed.

In the video CD reproducing apparatus for moving pictures of the present invention, MUSICnn. Since the reproduction of the designated chapter can be started from the middle of the DAT file, that is, from an appropriate position of the moving image data, it is possible to quickly find the desired moving image position.

Further, one MUSICnn. By dividing the DAT file into a plurality of pieces, it is possible to insert many pieces of video data into one file.

Further, according to the video CD recording method and the video CD of the present invention, an optical disk and an optical disk recording method which can be randomly accessed from an appropriate position of moving image data without changing the recording format or the like can be obtained.

In the above embodiment, the video stream coded with high efficiency in MPEG1 is explained, but MP is used.
Obviously, it can be applied to a video stream in which an interlaced image is highly efficient coded like EG2.

[0051]

As described above, according to the present invention, MUSIC
nn. Since the data can be read from the middle of the DAT file, it is possible to obtain an optical disk reproducing device capable of starting reproduction from the middle of a series of moving images.

[Brief description of drawings]

FIG. 1 is a flow chart of an optical disk reproducing apparatus of the present invention.

FIG. 2 is a system diagram showing an embodiment of an optical disc reproducing apparatus of the present invention.

FIG. 3 is a detailed diagram of a code text file used in the optical disc, the optical disc recording method, and the optical disc reproducing device of the present invention.

FIG. 4 is a code table of item packets used in the optical disc, the optical disc recording method, and the optical disc reproducing apparatus of the present invention.

FIG. 5 is a chapter file format used in the optical disc, the optical disc recording method, and the optical disc reproducing apparatus of the present invention.

FIG. 6 is a block diagram of a conventional video CD.

FIG. 7 is an explanatory diagram of a conventional method of reading compressed video and audio streams.

[Explanation of symbols]

 3 Karaoke standard information data 3b-3 _{n + 1} Code text file (KARINF
O. cc file) 5c Packet data (MUSICnn.DAT) 11 Text data 13 Total number of chapters 14 Chapter address

Claims (5)

[Claims] 1. An optical disc in which moving image data and acoustic data are highly efficiently encoded and recorded, and the moving image in a code text file provided in a reference information area other than the recording area of the moving image data and acoustic data of the optical disc. A moving image recorded on the optical disc through the position data reading unit, which records position data capable of reproducing image data from an appropriate position and reads the position data recorded on the optical disc. An optical disk reproducing apparatus characterized in that data is reproduced from an appropriate position. 2. The optical disk reproducing apparatus according to claim 1, wherein the optical disk is a moving picture CD. 3. The position data recorded in the code text file is user bit file item number 22.
3. The optical disk reproducing apparatus according to claim 1 or 2, wherein each chapter file data of the moving image data is recorded in No. 1 to No. 31. 4. The reference information data recorded in the code text file of the reference information data recording area different from the recording area of the moving image data and the acoustic data of the optical disc which is high efficiency encoded and recorded is the moving image. An optical disk recording method, which is each chapter file data of image data. 5. The chapter files of the moving image data are recorded in the code text file of the reference information area different from the recording area of the moving image data and the sound data while recording the moving image data and the sound data with high efficiency coding. An optical disc characterized by recording data.