JPH1064178A - Method for controlling recording of optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to prevent the breakage of moving mechanism by reading out catalog information from a first recording region, moving a recording means to a second region and recording the catalog information in the second region, then ejecting a disk when an eject instruction enters. SOLUTION: The data of a table-of-content TOC is always recorded in the lead-in part on the innermost periphery of the disk when the DRAW type compact disk 1 is taken out of a recorder body. At the time of reproducing, the signals of the DRAW type compact disk 1 are reproduced by an optical pickup 14 and regenerative RF signals are supplied to an RR amplifier 31. The signal recording of the DRAW type compact disk 1 is demodulated in the RR amplifier 31. The demodulated data is sent to a decoder 32. Various kinds of processing are executed in the decoder 32. At the time of reproducing, the optical pickup 14 is moved to the lead-in part and the data of TOC recorded in the lead-in part is read in.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk recording control method for recording data in the same form as a compact disk, for example.

[0002]

2. Description of the Related Art A conventional write-once optical disc has a reflectivity of 40% or less, whereas a standard for a read-only compact disc (a so-called Red Bo
ok), the reflectance is set to 70% or more. For this reason, in a conventional write-once optical disc, even if its mechanical parameters (external dimensions, center hole diameter, thickness, etc.) match those of a compact disc, its optical parameters (reflectance, refractive index, etc.) meet the standards of the compact disc. Unsatisfactory, it was difficult to reproduce with the current compact disc player.

[0003] However, a write-once optical disc having a reflectivity exceeding 70% has been developed by a new mechanism utilizing, for example, thermal energy. In the case of such a write-once optical disc, it is possible to realize an optical parameter that satisfies the compact disc standard as well as its mechanical parameters. Therefore, if such a write-once optical disc is used, a write-once compact disc that can be reproduced by a current compact disc player can be realized.

[0004]

However, as write-once compact discs that can be played on current compact disc players become popular, TOC (Table
There is a possibility that a disc in which the data of "Of Contents) is not written is mounted on the compact disc player.
When a disc on which TOC data is not recorded is loaded, the optical pickup cannot be set at the initial position at the start of reproduction, which is extremely dangerous.

That is, in a compact disc, a TOC (Table Of Contents) is provided in the innermost lead-in portion, and a time code at the start of each song recorded on the disc, a first song number, The last song number and last recording time are recorded.

In a write-once compact disc, TOC data cannot be rewritten. Therefore, after writing TOC data, data cannot be recorded even if the recording capacity of the disc has a margin.

For this reason, when a write-once compact disc that can be reproduced by a current compact disc player becomes widespread, T until the data recording area becomes full.
It is expected to be used in such a way that data is not recorded in the OC. When used in such a manner, there is a possibility that a disc on which TOC is not recorded is mounted on a compact disc player.

[0008] As is well known, in a compact disc player, when a disc is loaded, first, the pickup is moved to the innermost lead-in section, and control is performed so that TOC data is read. At this time, if a disc without TOC is loaded, the pickup cannot move to the initial position, and continues to move on the disc, and there is a risk that the moving mechanism of the pickup may be destroyed.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a recording control method for an optical disc which can prevent a disc without TOC from being mounted on a player.

[0010]

In order to solve the above-mentioned problems, the present invention provides a first recording area in which a wobbled guide groove is formed in advance and data is recorded, and a first recording area in which data is recorded.
A recording control method for performing recording on a recordable optical disc having a second recording area in which catalog information of data to be recorded in the recording area is recorded. The generated recording data is recorded in the first recording area of the optical disk by the recording means, and the recording data recorded in the first area of the optical disk and the wobbling previously formed in the first area of the optical disk are recorded. Generating catalog information based on the information reproduced from the guide groove, and storing the generated catalog information in a memory; reading an inventory information stored in the memory from the memory when a command to eject the optical disc is input; Is moved to the second area of the optical disc, and the inventory information read from the memory is recorded in the second area of the optical disc, and then the optical disc is read. Which is a recording control method of the optical disc, characterized in that the ejector.

When the eject command is input by pressing the tray open button 36, the recording means is moved to the second area of the optical disk, and the catalog information (TOC) held in the memory is transferred to the second recording area. After recording on the optical disk, the optical disk is ejected. As a result, when the write-once compact disc 1 is taken out of the recording apparatus main body, TOC data is always recorded in the innermost lead-in section 3 of the disc. Thus, it is possible to reliably prevent the optical disk from being ejected out of the apparatus main body without recording the TOC. As a result, upon reproducing a recordable optical disk, the optical disk can be satisfactorily reproduced based on the TOC.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of an optical disk apparatus in which the present invention is implemented. In FIG. 1, reference numeral 1 denotes a write-once compact disc. The write-once compact disc 1 is an optical disc on which data can be written only once. The write-once compact disc 1 satisfies the compact disc standard (the so-called Red Book) in both mechanical parameters and optical parameters. That is, the write-once compact disc 1
As shown in FIG. 2, the diameter φ is, for example, 12 cm,
At its center, for example, a center hole 2 of 15 mm is formed.
The write-once compact disc 1 has a reflectance of 70% or more.

The write-once compact disc 1 has a guide groove formed along a track. Along this guide groove,
Tracking control is performed. In this guide groove, unevenness is formed in the width direction, and time code information can be recorded by wobble.

The write-once compact disc 1 has a tray 1
0. The tray 10 has a tray driving mechanism 11
It is driven by. When the write-once compact disc 1 is mounted on the main body of the recording apparatus, the tray 10 is driven by the tray drive mechanism 11 as shown by the arrow A, and is exposed to the outside. Then, when the write-once compact disc 1 is placed on the tray 10, the write-once compact disc 1 is conveyed into the player main body by the tray 10 as shown by an arrow B, and attached to the rotating shaft of the spindle motor 12.

The spindle motor 12 is controlled and rotated by a spindle servo circuit 13. This allows
The write-once compact disc 1 is rotated at CLV (constant linear velocity).

The optical pickup 14 can be moved in the radial direction of the write-once compact disc 1 by a thread feed mechanism 15. A focus servo circuit 16 and a tracking servo circuit 17 are provided for the optical pickup 14. These focus servo circuit 16, tracking servo circuit 17, and spindle servo circuit 13 are under the control of a system controller 18. A command to the system controller 18 is given from the key switch 19.

At the time of recording, digital data is input from an input terminal 21, and the digital data from the input terminal 21 is sent to an encoder 24 via an input data interface 23. When an external time code is used, time code data is input from the input terminal 22 and the time code data is input to the switch 26.
To the encoder 24. For example, data of another compact disc can be written on a write-once compact disc 1
In such a case, digital audio data reproduced from another compact disc is input to an input terminal 21, and time code data obtained from a subcode of another compact disc is input to an input terminal 22.

When the internal time code is used, the time code data from the time code generation circuit 25 is sent to the encoder 24 via the switch 26. The time code generation circuit 25 is provided with the system controller 18
Is controlled by

A time code is recorded by wobbling the guide groove of the track of the write-once compact disc 1. This time code is obtained from the decoder 32, and the time code is sent to the encoder 24. It is sent to the system controller 18.

A reproduction synchronizing signal is supplied from a decoder 32 to the encoder 24. At the encoder 24, digital data from the input terminal 21 is encoded in a recording format of a compact disc. That is, the digital data from the input terminal 21 is developed into a predetermined frame, an error correction code is added by CIRC (Cross Interleave Reed-Solomon Code), and interleaving of a maximum of 108 frames is performed. Then, subcode data is formed based on the time code data from the input terminal 22 or the time code generation circuit 25, and the subcode data is added.

The data encoded by the encoder 24 is sent to a modulator 28, and the data is
FM modulation is performed. Then, the output of the modulator 28 is supplied to the optical pickup 14. A laser beam modulated by the output of the modulator 28 is output from the optical pickup 14, and the laser beam is applied to the write-once compact disc 1.

From the content of data recorded on the write-once compact disc 1 and its time code, the TOC (Tabl
e Of Content) data is formed. The TOC data is recorded in the memory 27 as needed.

When the recording of the data on the write-once compact disc 1 is completed and the tray open button 36 is pressed, the optical pickup 14 is driven by the command from the system controller 18 so that the innermost lead-in of the write-once compact disc 1 is inserted. It is moved to part 3 (FIG. 2). The lead-in section 3 stores the TO
C data is recorded.

That is, as shown in FIG. 3, when removing the write-once compact disc 1, it is first determined whether or not the tray open button 36 has been pressed (step 51). If it is determined, it is determined whether TOC data is recorded in the innermost lead-in section 3 of the disk (step 52).

The lead-in section 3 on the innermost circumference of the disk
If the data of C is recorded, a drive signal is given to the tray drive mechanism 11, and the tray 10 is opened (Step 53). Lead-in part 3 on the innermost circumference of the disk
If the TOC data is not recorded in the disc, the optical pickup 14 is moved to the innermost lead-in section 3 of the disk, and the TOC data is written in the lead-in section 3 (step 54). Thus, the innermost circumference of the disc
After the OC data is recorded, the tray 10 is opened.

As described above, in one embodiment of the present invention, the TOC data is written into the innermost lead-in section 3 of the disk in conjunction with the pressing of the tray open button 36. Therefore, when the write-once compact disc 1 is taken out from the recording apparatus main body, TOC data is always recorded in the lead-in section 3 on the innermost circumference of the disc.

At the time of reproduction, the write-once compact disc 1
Is reproduced by the optical pickup 14, and the reproduced RF signal is supplied to the RF amplifier / demodulator 31. The RF amplification demodulator 31 demodulates the recording signal of the write-once compact disc 1. The demodulated data is supplied to the decoder 32.
Sent to In the decoder 32, deinterleaving processing,
CIRC error correction processing and the like are performed, and the reproduction data from the write-once compact disc 1 is decoded. Further, time code data is reproduced from the subcode obtained from the reproduction data of the write-once compact disc 1.

The reproduced data decoded by the decoder 32 is
Output terminal 34 via output data interface 33
Output from The time code data reproduced by the decoder 32 is output from the output terminal 35 via the output data interface 33 and sent to the system controller 18.

At the time of reproduction, first, the optical pickup 14
Is moved to the lead-in section 3 on the innermost circumference of the disk. Then, the TOC data recorded in the lead-in unit 3 is read. From the TOC data, recording position information of the data recorded on the write-once compact disc 1 to be reproduced can be obtained.

Therefore, the write-once compact disc 1
If the TOC data is not recorded in the innermost lead-in section 3, the initial position of the optical pickup 14 cannot be determined at the start of reproduction. Therefore, the optical pickup 14
May oscillate, and the moving mechanism of the optical pickup 14 may be damaged.

In one embodiment of the present invention, as described above, TOC data is written to the innermost lead-in section 3 of the disk in conjunction with the pressing of the tray open button 36. Therefore, when the write-once compact disc 1 is taken out of the recording apparatus main body, TOC data is always recorded in the innermost lead-in section 3 of the disc. Accordingly, it is possible to prevent the position of the optical pickup 14 from being determined at the start of the reproduction and the moving mechanism of the optical pickup 14 from being damaged.

After data has been recorded on the write-once compact disc 1, there may be a case where reproduction is attempted before removing the write-once compact disc 1 from the recording apparatus main body in order to confirm the recorded data. At this time, memory 2
The optical pickup 14 is moved to a desired position by referring to the TOC data stored in the optical pickup 14.

In the above-described embodiment, the TOC data is controlled to be written in the innermost lead-in section 3 of the write-once compact disc 1 in conjunction with the pressing of the tray open button 36, and the disc is taken out. Although the TOC data is always recorded on the innermost lead-in section 3 of the write-once compact disc 1, the present invention is not limited to such control. When the write-once compact disc 1 after data recording is removed from the main body of the recording apparatus, TO
Any control may be performed as long as the C data is always recorded. For example, when the end confirmation button is pressed, the TOC
May be recorded such that the tray 10 is not opened unless the end confirmation button is pressed.

[0034]

According to the present invention, when the tray open button 36 is pressed and a command to transport the optical disk out of the apparatus main body is input, the innermost lead-in of the TOC data disk held in the memory is read. Control is performed such that TOC data is written in the unit 3. As a result, when the write-once compact disc 1 is removed from the recording apparatus main body, the lead-in section 3 on the innermost circumference of the disc is
C data is always recorded. Consequently, when reproducing a recordable optical disk, the optical pickup 14
Can reliably move to the innermost lead-in area of the disc,
When the reproduction is started, the initial position of the optical pickup 14 is not determined, and the risk of the moving mechanism of the optical pickup 14 being damaged can be prevented beforehand.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a plan view illustrating a disk according to an embodiment of the present invention.

FIG. 3 is a flowchart used to explain an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Write-once compact disc, 3 ... Lead-in part, 10 ... Tray, 14 ... Optical pickup, 18 ... System controller, 24 ... Encoder, 27 ... Memory, 32 ... Decoders, 36
... Tray open button

Claims (2)

[Claims] 1. A wobbled guide groove is formed in advance, a first recording area in which data is recorded, and a second recording area in which inventory information of data recorded in the first recording area is recorded.
A recording control method for performing recording on a recordable optical disc having a recording area having a first recording area and a first recording area of the optical disc by a recording unit by encoding processing of an input signal and generating the recording data. The recording information is recorded in the recording area of the optical disk and the inventory information is recorded on the basis of the recording data recorded in the first area of the optical disk and the information reproduced from the wobbled guide groove formed in the first area of the optical disk in advance. When the instruction to eject the optical disk is input, the inventory information stored in the memory is read from the memory and the recording means is moved to a second area of the optical disk. After the inventory information read from the memory is recorded in the second area of the optical disc, the optical disc is ejected. Recording control method of the optical disc, characterized in that the bets. 2. The optical disc recording method according to claim 1, wherein an eject operation is prohibited until recording of the inventory information read from the memory in the second area of the optical disc is completed. Control method.