JP2000163751A - Information recorder for optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform recording having an optimal recording characteristic by obtaining optimal recording speed information even at a double recording speed, to which an optical disk is applied, in the information recorder of a recordable optical disk. SOLUTION: By reading ATIP(absolute time in preglove) information recorded in a CD-R disk (draw type optical disk), a corresponding recording speed is determined (S2), recording is carried out in a test area by optimal recording power for each recording speed (S4), an optimal recording speed is extracted from its recording characteristic (S5), and this is stored by a storing means. When a user sets a recording speed, the optimal recording speed information is read, and a recording operation is performed at this recording speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording apparatus for an optical disc which records and reproduces information by irradiating a recording surface of a recordable optical disc such as a CD-R disc with a light beam.

[0002]

2. Description of the Related Art Conventionally, write-once optical disks (CD-ROMs) have been used as optical disks on which data can be written only once.
R (Compact Disk-Recordable) and CD-WO (Compact Di
sk-Write Once)). Also, a rewritable optical disk (CD-RW (Com
pact Disk-Rewritable) is known.

A drive device (information recording device: a CD-R drive device will be described below) for writing or reading data on or from this kind of optical disk is provided with a track format in a user data area called a program area on the CD-R disk. Record various data and reproduce the recorded data. Such an optical disk drive device generally has a power calibration function for detecting an optimum power level of a recording laser beam. When data is recorded, an OPC (Optimum Power Control) is used.
l) A power calibration operation called “(1)” is performed.

On the recording surface of the optical disk, a lead-in area for recording TOC information is provided on the inner side of a data area for storing various data. Prior to the operation, a PCA area (Power Calibration Area) for performing test recording in the OPC operation in order to detect the optimum power of the laser beam is provided. The PCA area includes a test area and a count area, and the test area includes a plurality of partitions, and each partition includes a plurality of frames. In one OPC operation, one partition is used, and a test signal is recorded with 15 levels of laser power for 15 frames. This test signal has an EFM (Eight to Fourteen Moment) composed of a pulse train having a time width 3 to 11 times the reference time width.
dulation) signal, and pits having a plurality of lengths are recorded in the frame.

On the inner peripheral side of the lead-in area, P
An MA area (Program Memory Area) is provided.
In the MA area, the start (start) of the track at the end of the data recording on the track of the optical disk by the CD-R drive device or before the data recording on the track.
Track address information such as time and end (stop) time is written. When a CD-R disc is inserted, the CD-R drive device
By collecting the address information of the tracks existing in the PMA area of the disk, the address information of all the tracks on the disk is grasped, and based on the address information, preparation for additional recording and reproduction on the track is performed. This P
In the MA area, address information of one track is recorded in units of a plurality of sectors.

[0006] Optical discs have TOC (Table of Table).
ATIP information (Absolute Time) which indicates an absolute time composed of an FM-modulated frequency signal as one of the contents) information.
In Pregroove), the ATIP information includes the applicable recording speed (standard double speed, double speed,
(Eg, 4 × speed) and the optimum laser power are recorded in advance by the disc manufacturer.

[0007] By the way, various improvement measures for performing recording with an optimum recording power have been proposed. For example, when a single disc has a plurality of areas in which audio and video are recorded at different linear velocities, an optimum recording power is determined using a test recording area in each area. (See JP-A-7-73470). In addition, control information about a laser modulation method such as recording power is stored in a storage unit of a drive device so that an appropriate recording state can be obtained according to a disc type, and read out according to a disc type to be used. There is one used at the time of recording (see Japanese Patent Application Laid-Open No. 7-57378). Further, at the time of laser output setting operation, there is a laser output setting operation which can be performed quickly by recording a test signal on a disk while varying the laser output at predetermined intervals (Japanese Patent Laid-Open No. 8-45101). Gazette).
Furthermore, when a plurality of different powers are required for the same recording, there is a device for reducing the number of times of trial writing (see Japanese Patent Application Laid-Open No. 9-115200).

However, in the above-mentioned prior art, all of the above are proposals for improving the recording speed at a certain recording speed. ) Does not consider which recording speed is most suitable.
In other words, the recording characteristics of a disc fluctuate due to variations in the operating environment temperature and disc performance, so that the same recording characteristics cannot be obtained at each speed, and there is an optimum recording speed among the applicable speeds. However, it does not extract the optimum recording speed and inform the user of it. Therefore, the user performs recording at an arbitrary double speed,
It is not always possible to take advantage of the most useful properties of the disc used.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has an optimum recording speed among recordable discs or rewritable discs which can be used by a user. It is an object of the present invention to provide an information recording apparatus for an optical disk capable of obtaining recording speed information and performing recording with optimum recording characteristics.

[0010]

According to one aspect of the present invention, there is provided an information recording apparatus for an optical disk for recording and reproducing information by irradiating a recording surface of a recordable optical disk with a light beam. The optimum recording speed extracting means for performing recording on the test area of the optical disc at each speed of the corresponding recording speed information of the disc recorded on the optical disc, and extracting the optimum recording speed from the recording characteristics, and Storage means for storing optimum recording speed information, wherein the optimum speed information is provided from the storage means when the user sets the recording speed.

According to the first aspect of the present invention, when the optical disc is inserted into the information recording apparatus, the information recording apparatus records on the test area of the optical disc at each speed of the corresponding recording speed information of the disc recorded on the optical disc, An optimum recording speed is extracted from the recording characteristics, and the extracted optimum recording speed information is stored in a storage unit. When the user sets the recording speed, the optimum speed information is read from the storage means, and the recording operation can be performed at the optimum speed.

According to a second aspect of the present invention, in the configuration of the first aspect, the optimum recording speed extracting means reads the corresponding recording speed information of the disc recorded on the optical disc by an optical head, and obtains the information by this reading. OP is added to the test area of the optical disc at each speed of the corresponding recording speed information
It has an optimum laser power value extracting means for performing the C operation and extracting the optimum laser power value for each recording speed, and the recording is performed in the test area with the extracted optimum laser power value, and the portion recorded at each recording speed. Is read back, and the speed at which the best recording characteristics are obtained is extracted.

According to a third aspect of the present invention, in the information recording apparatus for an optical disk according to the first or second aspect, the optimum recording speed information provided from the storage means is displayed on the display means. It is.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a system constituting an information recording apparatus for an optical disk. The information recording device is a CD-R which is one of recordable discs.
(CD-Recordable) A CD-R drive (writer) 2 that reads (reproduces) or writes (records) data on a disc 1 (also called a write-once CD) has a core configuration. Is connected to a host computer or a personal computer 5 (hereinafter, referred to as a personal computer) that controls the entire system through the interface 3 and executes predetermined arithmetic processing. The personal computer 5 is connected to a display 6 (display means) such as a liquid crystal and a writing tool 7 composed of a hard disk or the like in which a recording operation program is stored.

The CD-R drive 2 includes a CPU 10 for transferring data, recording and reading (reproducing) data on a CD-R in accordance with an instruction from a personal computer 5. Also,
The CD-R drive 2 includes a motor 11 for driving the table of the CD-R disc 1 to rotate, a drive circuit 12 for the motor,
Includes an optical head 13, a processing unit 14 for processing a reproduction signal from the optical head 13, a processing unit 15 for processing a recording signal for the optical head 13, and a focus servo circuit and a tracking servo circuit 16 for controlling the optical head 13. It is. Further, the CPU 10 is connected to a RAM 17 (storage means) for storing device information and the like necessary for writing data to a disk, a ROM 18 for storing a program, and the like.

The CD-R drive 2 is controlled by a command input from the operation unit (not shown) to the personal computer 5 and a program corresponding thereto, and performs a recording / reproducing operation. Also,
Prior to the recording operation, C is recorded at each speed of the corresponding recording speed information of the CD-R disc 1 recorded in advance on the disc.
A function of performing test recording in a test area of the DR disk 1 and extracting an optimum recording speed from its recording characteristics is provided (optimum recording speed extracting means).

FIG. 2 shows an example of the format of the CD-R disc 1. PCA area (PowerCalibration Area)
22 is an OPC for detecting the optimum power of the laser beam.
This is an area for performing test recording in operation, and is a PMA area (Pr
The gram memory area 23 is an area for recording information about a track before and after recording data on the track. The lead-in area 24 has a TO number including a track number and a track start time as session information.
An area in which C (Table of Contents) information is recorded, a program area (also called a user data area) 25
An area where a plurality of tracks are formed and various types of data are recorded, and a lead-out area 26 is an area indicating the end of a session. In addition, in the lead-in area 24, the applicable recording speed (standard double speed, double speed,
(4 × speed, etc.), optimal laser power, etc. are encoded by the manufacturer as ATIP information.

FIG. 3 is a flowchart of the processing up to the determination of the recording speed by the writing tool 7 of the personal computer 5 and the CPU 10 of the CD-R drive 2. When the CD-R disc 1 is inserted into the CD-R drive 2 (writer) (S1), the CD-R drive 2 reads the ATIP information by the optical head 13, and reads the ATIP information from the CD-R drive 1 according to the manufacturer and corresponding recording. The speed is determined (S2). The OPC operation is performed on the test area in the PCA area of the CD-R disc 1 at each speed of the corresponding recording speed information obtained as described above, and an optimum laser power value for each recording speed is extracted (S3; optimum laser power value extraction). . Recording is performed in the test area for each speed with the optimum laser power value extracted in this manner (S4), and the portion recorded at each recording speed is read back to extract the speed at which the best recording characteristics are obtained (S5; Optimal recording speed extraction). C thus obtained
The CPU 10 stores the optimum recording speed information of the DR disk 1 in the RAM 17. Thereafter, when the user sets the recording speed using the writing tool 7, the personal computer 5 reads out the optimum recording speed information obtained from the previous test recording and stored in the RAM 17 and displays it on the display 6. By this display, the CD-R disc 1 to be used
Of the corresponding recording speeds, the user can be informed of what speed is best.

The present invention is not limited to the configuration of the above embodiment, and various modifications are possible. For example, based on the corresponding speed information and the optimum laser power value obtained from the ATIP information, the optimum laser Recording may be performed on the test area with the power value to extract the optimum recording speed.

[0020]

As described above, according to the present invention, recording is performed on the test area of the optical disk at each speed of the corresponding speed information recorded on the optical disk, and the optimum recording speed is extracted from the recording characteristics, and the extracted recording speed is extracted. The optimum recording speed information stored is stored, and when the user sets the recording speed, the stored optimum speed information is read out, and the recording operation can be performed at the optimum speed. For this reason, the user can write data at a recording speed at which the optimum recording characteristics can be obtained even without prior knowledge of the disc to be used.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a system constituting a CD-R drive device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a format of a CD-R disc.

FIG. 3 is a flowchart of processing up to determination of a recording speed by a personal computer and a CD-R drive.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 CD-R disc 2 CD-R drive 5 Personal computer 6 Display (display means) 10 CPU (optimum recording speed extraction means, optimal laser power value extraction means) 13 Optical head 17 RAM (storage means)

Claims (3)

[Claims] 1. An information recording apparatus for an optical disc, which records and reproduces information by irradiating a recording surface of a recordable optical disc with a light beam, wherein each speed of corresponding recording speed information of the disc recorded on the optical disc is provided. And recording means for recording the optimum recording speed from the recording characteristics of the test area of the optical disk, and storing the optimum recording speed information extracted by the above. An information recording apparatus for an optical disk, wherein optimal speed information is provided from said storage means when setting is made. 2. The optimum recording speed extracting means reads the corresponding recording speed information of the disc recorded on the optical disc by an optical head, and stores an OPC in a test area of the optical disc at each speed of the corresponding speed information obtained by the reading.
It has an optimum laser power value extracting means for performing an operation and extracting an optimum laser power value for each recording speed, and records in the test area with the extracted optimum laser power value, and records a portion recorded at each recording speed. 2. The information recording apparatus for an optical disk according to claim 1, wherein a speed at which the best recording characteristics are obtained by reading back is extracted. 3. The optical disk information recording apparatus according to claim 1, wherein the optimum recording speed information provided from the storage unit is displayed on a display unit.