JP2003272148A - Optical disk recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restore data when recording a new user file on an optical disk based on a UDF (Universal Disc Format) in the case that a file management information becomes unreproducible and a user file becomes unreadable in recording the new user file. <P>SOLUTION: The optical disk is provided with a user file region on which the user file is recorded, and a file management information region with which an address where the user file is recorded is managed. After recording to the optical disk the new user file and new file management information associated with the new user file (S8) the data of the management information region are promptly reproduced (S9), and the existence/non-existence of an error occurrence is verified (S10). The data of the user file region are promptly reproduced on the basis of new file management information (S11) when there is the occurrence of the error. These reproduced data are recorded on a recording medium other than the optical disk. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc recording system, and more particularly to a UDF (Universal Disc).
The present invention relates to a recording method capable of recovering a user file when recording on a rewritable optical disk having a file management information area such as recording (hereinafter UDF recording) by a packet writing method in c Format).

[0002]

2. Description of the Related Art In recent years, a CD-RW has been used as a CD (compact disc) in which data can be erased and rewritten any number of times.
(CD-Rewritable) has become popular. CD
-The mainstream recording method for RW is the phase change recording method using the "principle that the reflectance changes depending on the crystal state of the substance", and for recording / reproducing of CD-RW, general-purpose optical disk recording is used. UDF is often used as the format.

As shown in FIG. 3, a file management information area 110 is formed on the inner peripheral side of the optical disc 100, and a user area 120 is formed on the outer side thereof. In the file management information area 110, file management information is recorded concentrically. Here, the file management information is information of an address where user data (user file) is recorded in the user area 120, and is the most important information in recording / reproducing the data (user file).

In the case of conventional UDF recording, recording was performed on the optical disk in the following order. (1) OPC (Optimum Power Cont)
The optimum recording power (Po) is calculated by "roll; optimum recording power calibration". (2) Read the file management information into the memory. (3) Data is additionally written in the recordable portion of the user area under the condition of the optimum recording power calculated in (1). (4) After additionally writing data, the file management information is recorded with the optimum recording power (overwriting the file management information).

[0005]

However, when direct overwriting (DOW, a recording method that does not require an erasing process at the time of recording: the above-mentioned overwrite) is applied to an optical disk of the phase change recording method, some recording is performed. If the signal recorded with power is DOWed with lower power than that, there is a problem that the error rate becomes high. Especially, overwrite with extremely low recording power (DO
W) causes a problem that the file management information cannot be read and the data cannot be read.

Further, in UDF recording, since file management information is rewritten by overwriting each time data is added, there is a problem that the frequency of DOW becomes high, and as a result, the factors that increase the error rate increase.

On the other hand, a phase change recording type drive has an O
Some drives have large variations in the optimum recording power that can be obtained with a PC. Also, due to differences in the pick-up between drive manufacturers, variations in the recording mark shape due to differences in the recording strategies, and factors that cause individual differences in the drives, recording under different conditions If the DOW characteristic is deteriorated,
There is a problem that the error rate of the file management information area having a high W frequency becomes high.

Further, in the optical disk proposed by the applicant of the present invention, a plurality of file management information areas are provided in order to improve the reliability of the file management information area. Also,
Recording is performed by changing the recording power for recording the file management information, and the DOW signal deterioration due to the variations in the recording power and the recording mark shape described above is repaired. Furthermore, a recording method is proposed in which the file management information is recorded on a medium different from the optical disc being recorded, in preparation for data recovery when the file management information cannot be reproduced and the user file cannot be read. .

However, the above-mentioned recording method is different from the current UDF format because it has a plurality of file management information areas, and the data recovery work is separately performed when the file management information cannot be reproduced and the user file cannot be read. There is a problem that it needs to be done.

Therefore, in the present invention, the UDF is used for the optical disk.
When a new user file is recorded according to the format, the file management information becomes unreproducible, and when the user file becomes unreadable, the data recovery is performed at the time when the new user file is recorded. To propose.

[0011]

According to a first aspect of the present invention, there is provided an optical disk comprising a user file area for recording a user file and a file management information area for managing an address at which the user file is recorded. In the optical disc recording method for recording the user file area and the file management information area, immediately after recording a new user file and recording new file management information associated with the recording, the data in the management information area is reproduced, and an error occurs. The presence / absence of an error is verified, and if an error is found, the data in the user file area is immediately reproduced based on the new file management information, and the reproduced data is recorded on a recording medium other than the optical disc. It is characterized by doing.

According to a second aspect of the invention, in the first aspect of the invention, when the new user file is recorded and the new file management information is recorded along with the recording, the data in the management information area is reproduced immediately after the recording. The presence or absence of an error is verified, and if there is an error, the new user file is recorded again with a power stronger than the recording laser power at the time of the recording, or a plurality of times. The feature is that the file management information is recorded.

According to a third aspect of the invention, in the second aspect of the invention, the reset value of the recording laser power is 1.1 to 1.2 times the optimum recording power.

The invention of claim 4 is characterized in that, in the invention of any one of claims 1 to 3, the recording medium other than the optical disk is a hard disk.

[0015]

1 is a block diagram of an optical disc recording apparatus applied to the present invention. As shown in the figure, the optical disc recording apparatus includes a computer 10 for performing various processes, and a display 11 attached thereto. , Record on optical disc
An optical disk drive 20 for reproducing and a hard disk drive 30 are provided.

FIG. 2 is a block diagram of the optical disk drive 20 shown in FIG. 1, which is an optical disk 10 of the phase change recording system.
Drive system 21 equipped with a spindle motor for rotating 0
A pickup 22 for reading / writing data from / on the optical disc 100, a laser drive circuit 23 using a laser beam emitted from a semiconductor laser as a light source, and a recording power setting circuit 24 for setting an optimum recording power (Po). I have it.

First, the basic operation of the optical disk recording apparatus will be described. The optical disc 100 is rotationally driven by the drive system 21. Through the optical system (not shown) of the recording / playback pickup 22 and the laser drive circuit 23, the optical disc 1
00 is irradiated with laser light. The recording layer of the optical disc 100 is changed by the irradiation of the laser beam, and the optical disc 1
The reflected light from 00 is received by the recording / reproducing pickup 22 to record or reproduce information on the optical disc 100. The optimum recording power of the recording / reproducing pickup 22 is calculated and set by the recording power setting circuit 24 using OPC (optimum recording power calibration). As a method of calculating the optimum recording power by OPC, for example, the optimum recording power (P
The γ method for obtaining o) is preferable.

Next, the control processing of the present invention will be described with reference to the schematic diagram of the optical disk shown in FIG. 3 and the flow chart shown in FIG. In the UDF format, as shown in FIG. 3, there is a file management information area 110 on the inner circumference of the optical disc 100. When the optical disc 100 is mounted in the drive, the file management information data in the file management information area 110 is reproduced (S1) and saved in the computer memory (host memory) (S2). Next, a new user file to be newly recorded is saved in the host memory (S3), and new file management information data is set based on the capacity of the new user file and the file management information data saved in the host memory. (S4),
Save to host memory (S5). Next, the optimum recording power Po is set by OPC (S6), the new user file is recorded in the user file area of the optical disc in the UDF format (S7), and the new file management information data is stored in the file management information area. Record (S
8).

Next, the file management information area is reproduced (S
9) If an error occurs (S10-YES), all user file areas on the optical disk are reproduced based on the new file management information data saved in the host memory (S11), and the reproduced data is stored in the host memory. The data is saved (S12), and then the data is saved to the hard disk (S13).

Next, a message "The writing to the optical disk is impossible and the user file has been saved on the hard disk" is displayed on the computer display (S14). If no error occurs during the reproduction of the file management information area (S10-NO), the process ends normally.

When an error occurs during the reproduction of the file management information area (S10-YES), O
It is also possible to set a recording power higher than the optimum recording power set by the PC, record the new user file and new file management information data again, and execute the processing flow for verifying the presence or absence of an error again. The re-recording with the recording power set high is not limited to one time, but the power may be increased stepwise and may be performed a plurality of times. The process after re-recording is the same as the flow in FIG.

The reset value of the recording power is set to 1.1 times to 1.2 times the optimum recording laser power value. The upper limit of 1.2 times was set because the recording signal deteriorates when it is too strong.

The user file saved in the hard disk can be recorded on another optical disk by using ordinary writing software, and the data can be easily restored on the optical disk.

[0024]

According to the invention of claim 1, the user file is recorded on an optical disk having a user file area for recording the user file and a file management information area for managing an address at which the user file is recorded. In the optical disc recording method of recording the area and the file management information area, immediately after the recording of a new user file and the recording of the new file management information accompanying the recording, the data in the management information area is immediately reproduced to determine whether an error has occurred. If there is an error, the data in the user file area is immediately reproduced based on the new file management information, and the reproduced data is recorded on a recording medium other than the optical disc. As a result, the rewritten file management information data cannot be played back and the user file cannot be read. Because even if it becomes, automatically user file is recorded on another medium, can solve the problem of loss of user files, also it is very convenient because repair of the user file is automatically performed.

According to the second aspect of the present invention, in recording the new user file and recording new file management information associated with the recording, the data in the management information area is reproduced immediately after recording to check whether or not an error has occurred. If it is verified and an error occurs, recording of the new user file and recording of new file management information accompanying the recording are performed again with a power stronger than the recording laser power at the time of recording, or a plurality of times. Therefore, in addition to having the effect of claim 1, writing the user file to the optical disc,
You can save more reliably.

According to the invention of claim 3, the reset value of the recording laser power is 1.1 to 1.2 times the optimum recording power, so that it has the effect of claim 2, and the user file data and file management. Overwriting of information data can be surely performed without causing signal deterioration.

According to the invention of claim 4, since the recording medium other than the optical disk is a hard disk, a user file on the optical disk can be backed up most easily and can be restored onto another optical disk most easily. Is.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an optical disk recording apparatus applied to the present invention.

FIG. 2 is a block diagram of the optical disk drive shown in FIG.

FIG. 3 is a schematic diagram of an optical disc.

FIG. 4 is a flowchart showing a control process of the present invention.

[Explanation of symbols]

10 ... Computer, 11 ... Display, 20 ... Optical disk drive, 30 ... Hard disk drive, 21
... Drive system, 22 ... Recording / reproducing pickup, 23 ... Laser drive circuit, 24 ... Recording power setting circuit, 100 ... Optical disk, 110 ... File management information area, 120 ... User area.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G11B 20/18 572 G11B 20/18 572C 572F 574 574H 27/00 27/00 DF term (reference) 5B082 DE06 EA01 JA12 5D044 BC01 BC06 DE03 DE38 DE57 DE68 EF05 GK12 5D090 AA01 BB04 CC02 DD03 FF36 FF43 GG17 GG36 GG38 KK03 5D110 AA13 AA17 AA19 DA11 DB03 DB10 DF01

Claims (4)

[Claims] 1. An optical disk comprising a user file area in which a user file is recorded and a file management information area for managing an address in which the user file is recorded, and the user file area and the file management information area. In the optical disc recording method for recording, immediately after recording a new user file and new file management information associated with the recording, the data in the management information area is immediately reproduced, and it is verified whether an error has occurred. If there is, an optical disk recording method characterized by immediately reproducing the data in the user file area based on the new file management information and recording the reproduced data in a recording medium other than the optical disk. 2. In the recording of the new user file and the recording of new file management information accompanying the recording, the data in the management information area is reproduced immediately after the recording, the existence of the error is verified, and the occurrence of the error is detected. If there is, recording of the new user file and recording of new file management information associated with the recording are performed again or a plurality of times with a power stronger than the recording laser power at the time of recording. The optical disc recording method according to claim 1. 3. The optical disk recording method according to claim 2, wherein the reset value of the recording laser power is 1.1 to 1.2 times the optimum recording power. 4. The optical disk recording method according to claim 1, wherein the recording medium other than the optical disk is a hard disk.