JPH0581992B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an optical disc that allows additional recording on the user side (hereinafter simply referred to as a write-once optical disc).
The present invention relates to a data recording method and apparatus thereof.

[Prior Art] In recent years, optical disks (optical disk-shaped recording media) have attracted attention as a medium that can record high-density and large-capacity information. In order to randomly access and play desired recorded data from among the large amount of recorded data recorded on such an optical disk on each player of different manufacturers, the recorded data and the
It is necessary that lead-in data (address data) corresponding to this be recorded in a compatible format. For example, in a playback-only compact disc (hereinafter simply abbreviated as CD) in an optical digital audio disc, the third
As shown in the figure, a lead-in area 3 is provided at the innermost circumference of the spiral track 2 formed on the CD 1, and a recording area 4 is provided continuously at the terminal end 3a of this lead-in area 3. Record data A, B, C, and D such as music data in the recording area 4,
Lead-in data a, b, c, and d such as time information and frame numbers for recording data A, B, C, and D are recorded in the lead-in area 3. Conventional CD1
is for playback only, so the recording data A, B, C, D and the corresponding lead-in data a, b, c, d to be recorded on CD 1 are known in advance at the time of original cutting on the manufacturer's side, so compatible formats are not possible. There were no particular problems with recording with Matsuto.

[Problems to be solved by the invention] However, the above-mentioned CD can be additionally recorded on the user side (i.e., a write-once CD).
When I tried to do this, the following problems arose.

When the user records multiple types of music data on one CD in several parts, for example, on the first day, Beethoven's music is recorded as the first song.
If you add Schubert's music as the second song on the second day, etc., the lead-in data to be recorded in the lead-in area will change each time you add a song on the first day, second day, etc. Because I end up doing it,
Lead-in data can only be written and recorded after all the songs have been recorded on that CD, and the beginning of the recorded data of all the songs that have been sequentially added to that CD is the end of the lead-in data. There was a problem in that it was very difficult to record continuously.

The present invention was made in view of the above-mentioned problems.
The object of the present invention is to provide a method and apparatus for simply and reliably recording record data and corresponding lead-in data in a compatible format on a write-once optical disc.

[Means for Solving the Problems] A data recording method for a write-once optical disc according to the present invention sets one of the innermost and outermost parts of a spiral track formed on the optical disc as a lead-in area, The other side is set as a store area, and after record data is recorded continuously at the end of the lead-in area, lead-in data corresponding to this record data is recorded in the store area, and the data is recorded in the store area when compatible formatting is performed. The lead-in data is read out and transferred and recorded in the lead-in area.

The data recording device for a write-once optical disk according to the present invention adds lead-in data to recording data inputted from an input circuit, sends this data to an optical head via a recording data line, and emits a laser beam from the optical head. In a recording device that records data in a predetermined area of an optical disk using light, the optical head is provided with a data reproduction function, and a memory for recording lead-in data is coupled to the reproduction output side of the optical head. , connect the normally open contact of a changeover switch to the output side of the memory, insert the normally closed contact/movable side common terminal of the changeover switch into the recording data line, and record the compatible format input from the input circuit. Based on the signal, the lead-in data recorded on the optical disk is transferred to the memory, and the movable piece of the changeover switch is switched from the normally closed contact side to the normally open contact side to transfer the lead-in data in the memory to the optical disk. The present invention is characterized in that it is provided with data transfer recording means for transferring and recording data to the lead-in area of the disc.

[Function] Recorded data input from the input circuit (for example, music data) and lead-in data (for example, time information and frame number of music data) added corresponding to this recorded data are transferred to the optical head for each recording. Additional recording is sequentially performed in the recording area and the outermost or innermost storage area of the optical disc by laser light emitted from the optical disk. After a predetermined amount of recording data is recorded on the optical disc, a compatible format is performed to make the optical disc playable by each manufacturer's player. That is, the data transfer recording means reproduces the lead-in data recorded in the store area of the optical disk based on the compatible format signal input from the input circuit, transfers and records this reproduced data to the memory, Next, the movable switch of the switch is switched from the normally closed contact side to the normally open contact side, reads the lead-in data from the memory, and transfers it to the innermost or outermost lead-in area of the optical disk via the optical head. Record.

[Embodiment] Fig. 1 shows a block diagram of an apparatus for carrying out the data recording method according to the present invention. In this figure, numeral 10 indicates recording data such as audio signals and signals for compatible format from a microphone or a line. This is an input circuit for inputting. The output side of this input circuit 10 is connected to a CD format encoder 12 via an A-D conversion circuit 11. The CD format encoder 12 is
This is a circuit that adds lead-in data such as time data, frame number data, error correction data, etc. corresponding to the recorded data. It is connected via a common terminal 16 and a recording data line 17 to the recording input side of an optical head 18 for recording and reproduction. The reproduction output side of the optical head 18 is connected to an audio signal output terminal 20 via a reproduction circuit 19, and is also connected to the input side of a memory 21 for recording lead-in data and for reverse reading. The output side of is connected to the normally open contact 22 of the changeover switch 13. 1 is a CD (compact disc) of optical digital audio discs as an example of optical discs, and this CD
1 is controlled to a predetermined rotational speed by a motor 24 driven by a drive signal from a motor drive circuit 23. A servo mechanism 25 controls the movement of the optical head 18 in the radial direction of the CD 1, and also controls the focus of the laser beam 26 irradiated from the optical head 18 to the CD 1. 27
is a control circuit mainly composed of a CPU (central processing unit), and this control circuit 27 is configured to control the CD format encoder 12, motor drive circuit 23, and servo mechanism 25. The control circuit 27 further reads the lead-in data recorded in the store area 29 of the CD 1 based on the compatible format signal input from the input circuit 10 via the signal line 28, and reads out the lead-in data recorded in the store area 29 of the CD 1. The data reproducing circuit 19
Then, the movable piece 15 of the changeover switch 13 is connected to the normally closed contact 14.
The memory 21 is switched from the side to the normally open contact 22 side.
The lead-in data recorded on the optical head 18 is outputted to the recording input side of the optical head 18 via the recording data line 17.

Next, the operation of the above embodiment will be explained with reference to FIG. 2.

(B) First, if Beethoven's music data A is to be recorded as the recording data for the first song on the first day, this music data A is input from the input circuit 10 and is input to the CD format encoder 12.
Lead-in data a corresponding to music data A
is added, and these data A, a pass through the normally closed contact 14 and common terminal 16 of the changeover switch 13,
Optical head 1 via recording data line 17
8 to the recording input side of optical head 1.
As shown in FIG. 2, the laser beam 26 irradiated from the CD 1 records a record placed following the terminal end 3a of the lead-in area 3 provided at the innermost circumference of the spiral track 2 of the CD 1. Area 4 and a store area 29 provided at the outermost periphery of track 2
The data is recorded from the inner circumference of the track 2 toward the outer circumference.

(b) Then, on the second, third, and fourth days, music data B, C, and D for the second, third, and fourth songs, respectively.
are additionally recorded, these music data B, C, D and corresponding lead-in data b, c, d are stored in the recording area 4 as shown in FIG. and store area 29, respectively. At this point, nothing is recorded in the lead-in area 3.

(c) When the recording of music data A, B, C, and D and the corresponding lead-in data a, b, c, and d on CD 1 is completed, write a compatible file to make this CD 1 playable on each manufacturer's player. Format. That is, when a compatible formatting signal is input to the control circuit 27 via the signal line 28 by pressing the formatting button of the input circuit 10, the control circuit 2
Based on the control signal from 7, first, the lead-in data a, b, c, d recorded in the store area 29 of the CD 1 is reproduced by the optical head 18.
It is recorded in the memory 21 via the reproduction circuit 19. Next, the movable piece 15 of the changeover switch 13 switches from the normally closed contact 14 side to the normally open contact 22 side, and the lead-in data a, b,
c and d are read in the opposite direction, and the changeover switch 1
3 and recording data line 17, and is recorded in the lead-in area 3 of the CD 1 via the optical head 18. At this time, the CD 1 rotates in the opposite direction to that during recording and playback in (a) and (b) above, and the end portion 3a of the lead-in area 3 following the recording start point of the music data A due to the loss of the RF signal. is detected by the control circuit 27, and the lead-in data d, c,
b and a are recorded in opposite directions. That is, as shown in FIG. 2, lead-in data a, b, c, and d are continuously recorded from the inner circumference side to the outer circumference side of the lead-in area 3, and at the end of the last lead-in data d. This corresponds to the end point a of the lead-in area 3, and is recorded so as to be continuous with the start point of the music data A.

In the above embodiment, in the case of a compatible format in which the innermost circumference of the CD track is the lead-in area, the innermost circumference and the outermost circumference are used as the lead-in area and the store area, respectively. In the case of a compatible format in which the lead-in area is the innermost periphery and the outermost periphery, the store area and the lead-in area may be used, respectively.

In the embodiment described above, a plurality of pieces of recorded data (music data) are recorded on a CD in multiple batches, but the present invention is not limited to this. It can also be used when recording only data) and converting it into a compatible format.

In the above embodiment, a method and an apparatus for recording predetermined data on a CD in an optical digital audio disk have been described, but the present invention is not limited thereto, and the present invention is not limited to this. and its devices can also be used.

[Effects of the Invention] As described above, in the data recording method for a write-once optical disc according to the present invention, one of the innermost circumference and the outermost circumference of the spiral track of the optical disk is used as a lead-in area, and the other is used as a storage area. When recording data, the lead-in data corresponding to the recorded data is first recorded in the store area, and when a predetermined amount of data has been recorded and a compatible format is performed, it is recorded in the store area. Since the read-in lead-in data is transferred and recorded in the original lead-in area, the compatible format of the optical disc becomes simple and reliable. Further, as described above, the write-once optical disc data recording device according to the present invention has a data reproducing mechanism in the optical head of the known optical disc data recording device, and the lead-in data is provided on the reproduction output side of the optical head. The lead-in data recorded in the memory is transferred to the original lead-in area of the optical disc by switching a changeover switch when the optical disc is formatted into a compatible format. Therefore, compatible formats of optical disks can be reliably achieved with a simple structure.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of an apparatus for carrying out the data recording method for a write-once optical disc according to the present invention, and FIG. 2 shows a compact disc ( FIG. 3 is a plan view showing a compatible format state of a playback-only compact disk (CD) manufactured by original cutting. 1... Compact disc (CD) (optical disc), 2... Track, 3... Lead-in area,
4... Recording area, 10... Input circuit, 12...
CD format encoder, 13... Selector switch, 17... Recording data line, 18... Optical head, 19... Playback circuit, 21... Memory,
26... Laser light, 27... Control circuit, 29...
Store area.

Claims (1)

[Scope of Claims] 1. One of the innermost and outermost peripheries of the spiral track formed on the optical disc is a lead-in area, the other is a store area, and the area continues from the end of the lead-in area. After recording the record data, record the lead-in data corresponding to this record data in the store area, read the lead-in data recorded in the store area at the time of compatible formatting, and transfer it to the lead-in area for recording. A recording method for a write-once optical disc characterized by: 2. To record the transfer of lead-in data recorded in the store area to the lead-in area, first transfer and record the lead-in data recorded in the store area to a memory for reverse reading, and then transfer the lead-in data from the memory. 2. The recording method for a write-once optical disc according to claim 1, wherein the read-out data is transferred and recorded from the end of the lead-in area to the start of the lead-in area. 3. Transfer recording of the lead-in data read from the memory for reverse reading from the end to the start of the lead-in area of the optical disc is performed by rotating the optical disc in the opposite direction. A recording method for a write-once optical disc according to scope 2. 4 Add lead-in data to the recording data input from the input circuit, send this data to the optical head via the recording data line, and write the data to a predetermined area of the optical disk using a laser beam irradiated from the optical head. In a recording device configured to record data, the optical head has a data reproduction function, a memory for recording lead-in data is coupled to the reproduction output side of the optical head, and a normally open switch is connected to the output side of the memory. Connect the contacts, insert the normally closed contact/movable side common terminal of the changeover switch into the recording data line, and record on the optical disc based on the compatible format signal input from the input circuit. A data transfer record that transfers lead-in data to the memory, switches the movable piece of the changeover switch from a normally closed contact side to a normally open contact side, and transfers and records the lead-in data in the memory to the lead-in area of the optical disk. 1. A data recording device for a write-once optical disc, characterized in that it is provided with means. 5. The memory for recording lead-in data serves as a memory for reverse reading, and the data transfer recording means rotates the optical disc in the reverse direction based on a detection signal that detects the end of the lead-in area of the optical disc. 5. The write-once optical disc data recording apparatus according to claim 4, wherein the lead-in data read from the reverse read memory is transferred and recorded from the end of the lead-in area to the start of the lead-in area.