JPH04114384A - Disk editing device - Google Patents

Abstract

PURPOSE:To easily perform the recording of a disk interchangeable with an existing CD by generating new TOC information based on subcode information, and recording the TOC information after completing the recording. CONSTITUTION:A main signal (a) reproduced in a prescribed order is inputted to a recording means 6, and simultaneously, a reproducing subcode (b) is converted to TNO according to a music order designated by a subcode edit means 3. Generated subcode output (e) for recording is converted to a prescribed format with the main signal (a), and is recorded on a disk 7 as a recording signal (g). Meanwhile, the start position of a track written on TOC is stored in a storage means 5 by conforming to the TNO. After the recording is completed, the TOC information, after being converted to a prescribed format by the recording means 6, is recorded on the read-in area of the disk 7 as the signal (g). Thereby, it is possible to perform the recording of the disk interchangeable with a general CD.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an editing device that edits audio recorded on a disk and records it on another disk.

Conventional Technology In recent years, compact discs (hereinafter referred to as CDs) have been developed in which analog signals are converted into digital signals and recorded on a disc.
is becoming increasingly popular. When using a CD, it is possible to take advantage of the random access feature of the disc to realize functions such as changing the order of songs in a program or skipping unnecessary sections. These functions are realized by using subcodes. The subcode is additional information regarding the program and is recorded on the same disc.

Hereinafter, the format of a CD that is currently in practical use will be explained with reference to the drawings.

FIG. 6 is a diagram showing the frame structure of a CD.

One frame consists of a synchronization signal for frame synchronization, followed by a 1-byte subcode, a 12-byte main signal, a 4-byte parity code, and then a 12-byte main signal and a 4-byte parity code. .

FIG. 7 is a diagram showing the block configuration of the subcode.

Only 1 byte subcodes in the frame shown in FIG. 6 are collected for 98 frames to form one block.

The first two bytes are synchronization signal patterns SO and Sl for identifying blocks of subcodes. A P-W name is assigned to each bit of the subcode, and the meaning of each bit is defined. P is for each program (hereinafter referred to as a track) recorded on the CD.
In other words, it is a subcode indicating between songs, and is 1 between songs and O during a song. Q is the most important subcode information regarding the main signal, and one block of 98 bits is further subdivided and defined. The definition of each bit of Q will be described in the explanation of FIG. R-W is reserved for graphics, etc., but is not used in normal music CDs.

FIG. 8 is an external view showing the area of the CD.

Lead-in area 11 from the inner circumferential side as a signal recording area
, program area 12, and lead-out area 13. In the lead-in area 11, the main signal is silent, and the start position of each trunk within the disc is recorded using subcode Q.
It is called a table of contents (hereinafter referred to as TOC). A main signal and a subcode that changes with the main signal are recorded in the program area 12, a subcode indicating the end of the disc is recorded in the lead-out area 13, and the main signal is silent.

FIGS. 9(A) and 9(B) are diagrams showing block configurations of subcodes Q in the lead-in area and program area. First, the subcode block in the lead-in area of FIG. 3A will be explained. The 2 bits SO and SL are part of the synchronization signal pattern, and the 4 control bits are basic information such as the number of track channels, presence or absence of emphasis, copy prohibition/permission, audio/data discrimination, etc. Valid for tracks indicated by . The 4 bits of the address indicate the format of data after the next TNO, and the format shown in FIG. 9 is when address=1. TNO
The 8 bits originally represent the track number, but in the lead-in area, it is fixed to OO and is used to distinguish it from the program area. The 8 bits of POINT are the track number, which is usually represented by a 2-digit BCD code.

It is possible to indicate tracks from 01 to 99. M
Each 8 bits of IN, SEC, and FRAME is a 2-digit BCD code, and the relative time within the track is minutes, 9 seconds,
Represented by a frame. The subcode is incremented by one frame per block, and 75 frames equals one second. ZER
The 8 bits of O take a fixed value OO. PMIN, PSEC
, PFRAME is a 2-digit BCD code indicating the start position of the track numbered by POINT as an absolute address within the disk area, representing one minute and one second.

Represented by a frame. When POINT is AO, PMI
N indicates the first track number in the program area, and when POINT is AI, indicates the last track number. In this case, PSEC and PFRAME are both 00. Also, when POINT is A2, PSEC, PM
IN and PFRAME indicate the start position of the lead-out area as an absolute address. CRC is a 16-bit error detection code, and is generated as an error detection code for bits from control to PFRAME.

Next, the subcode block Q of the program area shown in FIG. 5(B) will be explained. SO, Sl, control, address, ZERO, and CRC are the same as in the lead-in area. TNO is a track number and indicates the track number of the main signal at that position. INDEX is used to further subdivide the main signal within a track. Values range from 01 to 99 within the same track number, and 0
0 indicates that it is between songs. MIN, SEC, FRAM
E is basically the same as the lead-in area and represents the relative time within the track, but it counts down in the silent portion between songs, and becomes 00 minutes 00 seconds 0071/-m at the beginning of the song. AMIN, ASEC, and AFRAME are absolute addresses that sequentially increase increments until the end of the disk, with the start position of the program area set as OO minutes, OO seconds, and OO frames.

FIG. 10 is an example of a TOC recorded using subcode Q in the lead-in area. Of the blocks of subcode Q, only POINT, PMIN, PSEC, and PFRAME are described. In this example, the number of tracks is 6, and the track numbers are from 1 to
This is an example of the TOC of a disc that has been recorded up to 6. The POINT written in a certain subcode block n in the lead-in area is 01, and the PMIN and PS at that time are
If EC, PFRAME is 00,02.32, the first
The starting position of the track is the absolute address 00002 seconds 32.
This indicates that it is a frame. Three subcode blocks with the same content are recorded in succession. Subsequently, subcode block n+
The start position of the second track is written in blocks 3 to 3. Similarly, after the information up to the 6th track is recorded, POINT=AO and PMIN
is the first track number 01, POINT=A1
The PMIN of the block contains the final track number 06, P
At OINT=A2, the lead-out start position, in this example, 52 minutes, 48 seconds, and 41 frames are written in three blocks each. These TOC information are further written repeatedly during the lead-in area.

FIG. 11 is a diagram visually explaining the state of subcodes in each area of the CD described above.

The disc is divided from the inner circumference into a lead-in area containing the TOC, a program area where tracks (6 tracks in this example) are written, and a lead-out area that indicates when a track has ended. Subcode P becomes 1 between songs and before the start of lead-out. Also, within the lead-out area, 2Hz after 0 for 2 to 3 seconds.
Repeat 110 at intervals of about 20 minutes. Otherwise, it is 0. TNo is OOl for lead-in and A for lead-out.
Al The program area shows the track number including the no-signal section at the beginning of the track.

Also, MIN, SEC, and FRAME move backwards during the silent section, and at the start of the song, oo, oo, o.

and then increases until the end of the track.

AMIN, ASEC, AFRAME are program 11J
7 (7) Start position oo, oo, oo and t and monotonically increase until the end of the disc.

By using the TOC described above and the subcodes added to the tracks in the program area, various functions that take advantage of the access speed unique to the disc can be realized. In other words, since the position of each track on the disc is known in advance from the TOC information, by comparing that value with the current position of the optical pickup, various searches, skips, and program playback with randomly specified track numbers can be performed. etc. can be achieved easily and quickly. Furthermore, various displays regarding time, such as the elapsed time from the beginning of the song, the total elapsed time to the current position, and the remaining time until the end, can be easily performed using the time information of the subcode.

However, CDs can only be played by users;
Therefore, if you do not own a CD, it is common to enjoy it by dubbing it onto a cassette tape.

When dubbing to a cassette tape, the sound quality deteriorates, and since there is no access or skip function using subcodes as described above, the operability is significantly impaired compared to CDs. Therefore, a disk recorder using a disk similar to a CD as a recording medium is being considered. Various methods have been proposed for recordable discs to date, and some of them are commercially available, mainly for commercial use, but for general consumer use, recorded discs can be played in the same way as CDs on existing CD players. , and it is desirable that similar functions can be realized.

Therefore, the recorded disc must also satisfy the above-mentioned CD program format and subcode format.

Problems to be Solved by the Invention However, the above-mentioned subcode format is based on the premise that the subcode information of the program to be recorded is known in advance. For example, in FIG. 11, there is a TNO from track 1 to track 2.
changes at the end point of track 1, and the silent section is subcode P = 1, or -) MIN, SEC, FR
AME becomes a down count, and it needs to become oo, oo, oo when the sound of track 2 is output. However, since it is impossible to predict signals that will be input in the future with a normal recording device that inputs recording signals in real time, these subcodes cannot be recorded. Also, as explained in Figure 6, the subcode is formatted as one byte in the frame, so
It is also impossible to perform so-called post-recording processing in which only the subcode is rewritten after recording the main signal. Therefore, in a professional disk recorder, the main signal to be recorded and its subcode, including the TOC, are stored in an external large-capacity hard disk, etc., and then edited.
A method is adopted in which data is continuously recorded on a recording disk. However, this method requires a large amount of money for peripheral devices, and the subcode editing work itself is complicated, so it is not practical for general consumer use.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a disc editing device capable of recording discs compatible with conventional CDs with simple operation and at low cost.

Means for Solving the Problems In order to achieve the above object, the disk editing device of the present invention includes one or more disks on which a plurality of programs and subcode information which is incidental information regarding the plurality of programs are recorded. a reproduction means capable of selectively reproducing the program from the discs; a reproduction order designation means for specifying the reproduction order of the programs on the one or more discs based on external input; and the reproduction order designation. subcode editing means for reorganizing the subcode information to be reproduced based on the reproduction order specified by the means; storage means for storing the subcode information rearranged by the subcode editing means; and the reproduction order. The apparatus includes a program to be reproduced according to the reproduction order designated by the designation means, and a recording means for recording the reorganized subcode information and the subcode information stored in the storage means on a recording disk.

Operation With the above-described configuration, the present invention sequentially records programs to be reproduced in an externally specified order on a recording disk, and records newly generated subcode information based on subcode information to be reproduced at the same time. Furthermore, new TOC information is generated based on the recorded subcode information, making it possible to easily produce a disc that is format compatible with a CD.

Embodiment Hereinafter, a disc editing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a disc editing device in one embodiment of the present invention. In FIG. 1, IA,
, IB, IC is a reproduction disk, 2 is a reproduction means, a is a reproduced main signal, b is a reproduction subcode signal, 3
4 is a subcode editing means; C is an input for specifying the playback order from the outside; 4 is a playback song order specifying means for instructing the playback means 2 and the subcode editing means 3 to play the song order in accordance with the specification of the external input C; d is a reproduction song order command, e is an edited recording subcode output, 5 is a storage means for temporarily storing edited recording TOC information, f is a recording TOC output, 6 is a recording means, and g is a recording signal. , 7 is a recording disk.

The operation of the disc editing apparatus configured as described above will be explained below with reference to FIGS. 1 to 5.

First, playback discs IA, IB, IC (7)
T.

An example of C is shown in FIG. In this example, the IA disk has 7
It is assumed that five songs (tracks) are recorded on the IB disk and 11 programs are recorded on the IC disk. Next, input C is used to input the playback order of the programs on the playback disks IA to IC. In this example, the first track to be recorded is the 4th track of the disc IC, the second track is the 5th track of the disc IC, the third track is the 6th track of the disc IA, the 4th track, etc. The 2nd song on Disc IB is the 5th song. Assume that the 8th track of the disc IC is specified as the 3rd track and finally the 6th track.

Next, the playback order specifying means 4 instructs the playback means 2 to play the disc according to the specified song order. The main signal a, which is sequentially reproduced in a predetermined order, is input to the recording means 6. On the other hand, the reproduction subcode b to be reproduced at the same time is input to the subcode editing means 3. The processing contents of the subcode editing means 3 are shown in FIGS. 3 to 5.

FIG. 3 shows the processing when recording the first track. The recording operation starts at the time when the specified TNO of the first track and mark is detected (at the time when TNO=n in FIG. 3). Of the subcodes in the program area shown in Figure 9, control, address, and INDEX
, MIN, SEC, FRAME, and ZERO, the reproduced subcodes can be copied as they are. TNO is a TN that follows the specified song order for the TNO to be played.
Convert to O. In the first track, it is 01. AMIN
, ASEC, and AFRAME, the start position of the program area of the recording disk, that is, the recording start time, is set as oo, oo, and oo, and the cumulative recording time from there is written. The CRC is added by generating a predetermined error detection code for the APRAME information from the control generated as described above.

The recording subcode output e generated as described above is directly input to the recording means 6, where it is converted into a predetermined format together with the aforementioned main signal a and recorded in the program area of the recording disk 7 as a recording signal g. . The recording operation is canceled when the TNO (=n) of the reproduction subcode changes to the next TNO (=n+1). On the other hand, the track start position written in the TOC does not indicate the point at which the TNO changes, but indicates the point at which the program for that trunk actually starts. In other words, the silent section at the beginning of the track (INDEX=OO or subcode P=1) ends, and MIN, SEC, FRAME change to oo, oo, o.
This is the point at which the value becomes o, and is the point indicated by a mark in FIGS. 3 to 5. Therefore, the above subcode information to be played is monitored and the start point of each track is set to A.
MIN.

TN detected and recorded by ASEC, AFRAME values
It is stored in the storage means 5 while being associated with O.

FIG. 4 shows the processing when recording intermediate tracks. As in FIG. 3, the recording state is maintained while a predetermined TNO (2 m) is being reproduced, and the recording operation is canceled when the TNO reaches m+1.

FIG. 5 shows the processing when recording the final track. When recording the final track, the recording does not end at the end of the track, but continues to be recorded in the lead-out area. In the lead-out area, the main signal is silent, TNO=AA.

INDEX=01 fixed, MIN, SEC, FR
Restart AME from oo, oo, oo. Further, the transition point to the lead-out area is also stored in the storage means 5.

The TOC information generated inside the storage means 5 is shown at the right end of FIG. Assuming that the first track was recorded 2 seconds from the start of the program area, the PMI with POINT 01
The values of N, PSEC, and PFRAME are 00. 02. 0
0. Next, the start position of the second track and the start positions of each track are written in sequence. Also, POI
NT=AO is the first track number and PM I N= 1
, POI NT=A1 is the last track number and PMIN=
6. POINT=A2 is the start position of the lead-in area.

After all the programs and lead-out areas have been recorded, the recording TOC information stored in the storage means 5 is output to the recording means 6, and after being converted into a predetermined format, the recording signal g is sent to the recording disk 7. is recorded in the lead-in area, and recording to the disc ends.

As described above, according to the present embodiment, the main signal of the program to be played based on the playback order of programs on one or more discs specified from the outside, and the subcode that is reorganized by the subcode editing means. By recording the code on the recording disk by the recording means, generating the recording TOC in the storage means by the subcode editing means, and recording the recording TOC after the recording of the program is completed, simply specifying the playback order of the songs. With this simple operation, it is possible to record on a disc that conforms to the CD format.

In this embodiment, the storage means, playback order designation means, and subcode editing means have been described as independent blocks, but all these functions can be processed by a single-chip microcomputer. Further, in this embodiment, the description has been made using one recording disk, but there is no problem even if there are a plurality of recording disks.

Effects of the Invention As described above, the present invention enables programs to be selectively reproduced from one or more disks on which a plurality of programs and subcode information, which is incidental information regarding the plurality of programs, are recorded. a playback means, a playback order designation means for specifying the playback order of programs on one or more discs based on external input, and a playback order designation means for reproducing subcode information based on the playback order specified by the playback order designation means. A subcode editing means for organizing, a storage means for storing TOC information reorganized by the subcode editing means, and a program to be played according to the playback order designated by the playback order designation means and the rearranged subcodes. By being equipped with a recording means for recording on a recording disc, you can easily record songs on commercially available CDs by simply specifying the order of the songs.
It is easy to manufacture discs that are format compatible with D, and since there is no need for peripheral equipment such as hard discs or special editing equipment, it can be realized at low cost, and the effects are significant. be.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a disc editing device in an embodiment of the present invention, Fig. 2 is an explanatory diagram for explaining an example of an edited TOC, and Fig. 3 is an editing process when recording the first track. An operation explanatory diagram for explaining the operation, FIG. 4 is an operation explanatory diagram for explaining the editing process operation when recording an intermediate track, and FIG. 5 is an operation explanatory diagram for explaining the editing process operation when recording the final track. An explanatory diagram of the operation for
Fig. 7 is a schematic diagram showing the block structure of the subcode, Fig. 8 is an external view showing the CD area, and Fig. 9 is a schematic diagram showing the subcode Q of the lead-in area and program area. Block configuration diagram, Figure 10 is TOC
FIG. 11 is an explanatory diagram for explaining an example of the operation. IA, IB, IC... playback disc,
2... Reproducing means, 3... Subcode editing means,
4... Playback order specifying means, 5... Storage means, 6... Recording means, Name of agent Patent attorney Akira Oguri and two others γ Figure 10 Surfcoat N+2 N13 t1+4 N+S N+6 N+7 y+B Bullfighting 9 N book IQ ~+11 N+t2 N+13 N+14 N+-1g N+16 N++7 ~◆lε 1119 1J+ZQ N groan 2 N+22 N+23 Bullfighting 24 1Pr Wa chase

Claims (1)

[Claims] (1) A reproduction means capable of selectively reproducing a plurality of programs from one or more disks on which a plurality of programs and subcode information which is incidental information regarding the plurality of programs are recorded, and playback order specifying means for specifying the playback order of the programs on the one or more discs based on an input from said subcode information; a storage means for storing the subcode information reorganized by the subcode editing means; a program to be played according to the playback order designated by the playback order designation means; and a storage means for storing the subcode information reorganized by the subcode editing means; A disc editing device comprising: recording means for recording subcode information and subcode information stored in the storage means on a recording disc.