KR100466929B1 - Optical Disc Recording Method and Apparatus - Google Patents

Abstract

According to the present invention, when an optical disc manufactured by a new optical disc manufacturer, which is not previously stored in the system memory, is inserted into the optical disc recording apparatus, a plurality of previously stored discs according to the physical characteristics (cyanine disc and phthalocyanine disc) of the disc may be used. A method of determining an optimal write power and an optimal write strategy using default signal recording characteristic information and using the same to record data on an optical disc. A first step of determining a manufacturer of the medium; A second step of reading out a plurality of preset optimal record information in response to the non-determination when the manufacturer cannot be determined in the first step; And a third step of searching for optimal recording information for data recording on the mounted recording medium by using the read plurality of optimal recording information.

Description

Optimal Recording Information Search Method for Recording Media {Optical Disc Recording Method and Apparatus}

The present invention relates to a method of searching for optimal recording information of a recording medium. More specifically, when an optical disc manufactured by an optical disc manufacturer, which is not stored in a memory, is loaded, the physical characteristics of the optical disc (cyanine or phthalocyanine) are loaded. The present invention relates to a method of determining and recording an optimal write power and an optimal signal write method by using default signal write characteristic information stored in a plurality of memories in the memory.

1 is a diagram showing the configuration of a general optical disc recording / reproducing apparatus. The optical disc recording / reproducing apparatus includes: a digital recording signal processing unit (30a) for adding an error correction code (ECC) or the like to input digital data to convert it into a recording format; A channel bit encoder (40) for reconverting the data converted into the recording format into a bitstream; An optical driver 41 for outputting an optical drive signal according to an input signal; An optical pickup (20) for recording a signal on the optical disc (10) according to the optical drive signal and for detecting a recording signal from the recording surface; An RF unit 50 for filtering the RF (high frequency) signal detected by the optical pickup 20 to output a binary signal; A level detector 51 for detecting the level of the signal reflected by the recording light (the level of the RF signal); A drive unit 70 driving a sled motor (not shown) for moving the optical pickup 20 and a spindle motor 11 for rotating the optical disc 10; A servo unit 60 for controlling the driving of the drive unit 70 from the tracking error (T.E) and focus error (F.E) signals of the optical pickup 20 and the rotational speed of the optical disc 10; A digital reproduction signal processing unit (30b) for restoring the binary signal to original data with its clock synchronized with the binary signal; Information on the signal recording method (write strategy) for each disk manufacturer stored in the memory, and default signal recording characteristic information stored one by one according to the physical characteristics of the disk (cyanine or phthalocyanine). Performing a data recording operation on the optical disc 10 using a target beta range of a signal and a reproduction signal, a reference recording power, and a write strategy], wherein the optical disc 10 Is an optical disc manufactured by a manufacturer not previously stored in the memory, the optimum recording power is determined using the pre-stored default signal recording specific information, and the signal recording method included in the default signal recording characteristic information and the And a microcomputer 80 for controlling data to be recorded using the determined optimum recording power.

Next, a write strategy will be described with reference to FIG. 2.

2 is a diagram showing an example of an EFM (Eight to Fourteen Modulation) signal and a recording pulse. For example, to record an EFM 3T signal as shown in FIG. 2, the control unit 80a of the microcomputer 80 performs data recording using any one of the signal recording methods stored in the memory. DELTA P, DELTA T1, DELTA T2, and DELTA T3 are set to different types. This type (ie, signal recording method) can be set by various simulation results at the manufacturing stage.

FIG. 3 is a view schematically showing the layout of an optical disk to which the present invention is applied. The recordable optical disks CD-R and CD-RW may include a power calibration area (PCA) and a program memory area. PMA), a lead-in area and a lead-out area (not shown). Here, the PCA is composed of a test area in which EFM data is recorded for testing in accordance with an optimum recording power control (OPC), and a count area in which part of the test area is available.

4 is a format of Absolute Time In Pre-groove (ATIP) information recorded on a recordable optical disc. The ATIP information is composed of Minutes, Seconds, and Frames bytes each consisting of 8 bits, and a combination of the most significant bits of each byte ( That is, the contents of the ATIP information are divided by M1, S1, and F1 in FIG. 4.

In general, a write strategy, which is information required for data recording of a recordable optical disc [for example, CD-R (CD-Recordable), CD-RW (CD-ReWritable)], has a value different for each optical disc manufacturer. Different. Therefore, in the manufacturing stage of the optical disc recording apparatus, the device manufacturer simulates recording and reproducing characteristics of a sample of a known optical disc, thereby recording the signal recording characteristic information [target beta range and reference recording power and signal recording method for each optical disc manufacturer]. (write strategy), and the signal recording characteristic information [target beta range and reference recording power and signal recording method] corresponding to each optical disk manufacturer code (A to n) as shown by way of example in FIG. Save it to memory. Then, the physical properties of the optical disc are set to set the signal recording characteristic information (target beta range and reference recording power and signal recording method) as default for the optical disc which is not well known and the sample is not obtained or manufactured after shipment of the device. According to the characteristics [cyanine-based disk and phthalocyanine-based disk], one default signal recording characteristic information (cyanine-based default signal recording characteristic information and phthalocyanine-based default signal recording characteristic information) is also stored in the memory.

As described above, signal recording characteristic information (target beta range, reference recording power, and signal recording method) of optical discs for each optical disc manufacturer stored in the memory is shown in a table form. That is, the beta value range (B_A to B_n), the reference recording power (P_A to P_n), the signal recording method (WS_A to WS_n), and the physical characteristics of the disc (cyanine system and program) for each of a plurality of manufacturers (A to n) codes The target beta range (B_CD to B_PD), the reference recording power (P_CD to P_PD), and the signal recording method (WS_CD to WS_PD) are recorded and stored one by one for each talcyanine.

Next, the operation of the conventional optical disc recording apparatus will be described with reference to the flow of FIG.

First, as shown in FIG. 5, the optical disc is stored in an optical disc recording apparatus in which signal recording characteristic information [target beta range, reference recording power, signal recording method] and default signal recording characteristic information of an optical disc by optical disc manufacturer are stored in a table. When loaded (step S100), the microcomputer 80 determines the manufacturer of the optical disc 10 from the start address ATIP information frame in the lead-in area (or lead-out area) of the loaded optical disc 10. That is, since the start time (START TIME) of the lead-in area (or lead-out area) is different for each optical disc manufacturer, it is possible to easily determine the optical disc manufacturer (steps S110 to S130).

When it is determined in step S130 that the loaded disk 10 is a disk manufactured by a manufacturer previously stored in the memory, the microcomputer 80 stores the corresponding manufacturer in a table previously stored in the memory as shown in FIG. 5. Read signal recording characteristic information [target beta range and reference recording power and signal recording method] corresponding to the code, and perform optimal power control (OPC) using the read reference recording power and signal recording method. To determine the optimal recording power. The method for determining the optimum recording power by this optimum power control is performed through the following steps S150 to S180.

That is, test recording of, for example, 15 ATIP blocks is performed while scanning the recording power in units of a predetermined level based on the reference recording power (step S150).

Thereafter, the microcomputer 80 controls the disc reproducing system to reproduce data of, for example, 15 ATIP blocks recorded during the power scan (step S160).

Subsequently, the microcomputer 80 calculates a beta value, which is an asymmetry of the recording signal and the reproduction signal, with respect to the data of the reproduced, for example, 15 ATIP blocks, and outputs a target value from the signal recording characteristic information of the optical disk manufacturer previously stored in the memory. The bet range is read to determine whether the calculated beta values are within the target beta range. Thereafter, the microcomputer 80 selects recording powers for the calculated beta values within the target beta range (step S170).

Next, the microcomputer 80 obtains reproduction jitter values for the data recorded with the selected recording powers, and selects the recording power for the recording data having the minimum jitter value as the optimal recording power. (Step S180).

Thereafter, the microcomputer 80 writes data to the disk 10 by using the selected optimal recording power and a signal recording method for a manufacturer of the loaded disk 10 (step S190).

On the other hand, if it is determined in step S130 that the loaded optical disk 10 is an optical disk manufactured by a manufacturer that does not have information stored in the memory, the physical characteristics of the loaded optical disk (cyanine-based disk or frame). It is checked whether it is a thalocyanine-based disk (step S140).

Thereafter, the microcomputer 80 corresponds to a code for a cyanine-based default or a phthalocyanine-based default previously stored in the memory as shown in FIG. 5 according to the identified physical characteristics, that is, cyanine-based or phthalocyanine-based. The reference recording power and the signal recording method are read out of the signal recording characteristic information, and the test recording of, for example, 15 ATIP blocks is performed while scanning the recording power by a predetermined level based on the reference recording power (step S200). ).

Thereafter, the microcomputer 80 controls the disc reproducing system to reproduce data of, for example, 15 ATIP blocks recorded during the power scan (step S210).

Subsequently, the microcomputer 80 calculates a beta value for the data of the reproduced, for example, 15 ATIP blocks, and then sets corresponding default signal recording characteristic information (i.e., cyanine system) according to the physical characteristics of the disk previously stored in the memory. Target signal ranges are read from the default signal recording characteristic information or the phthalocyanine-based default signal recording characteristic information to determine whether the calculated beta values are within the target beta range. The microcomputer 80 then selects write powers for the calculated beta values that are within the target beta range (step S220).

Next, the microcomputer 80 obtains the reproduction jitter value for the data recorded with the selected recording powers, and selects the recording power for the recording data having the minimum jitter value as the optimum recording power (step S230). ).

Thereafter, the microcomputer 80 writes data to the disc 10 using the signal recording method among the selected optimal recording power and the corresponding default signal recording characteristic information (step S240).

However, in the conventional data recording method of the optical disk, in the case of the optical disk manufactured by a new manufacturer, data recording is performed by fixing the default signal recording characteristic information unconditionally regardless of the disk characteristics (that is, without undergoing a simulation process). Therefore, the recording data may be severely distorted depending on the optical disc. Therefore, in the conventional method, there is a problem that the quality of the recording data may decrease depending on the optical disc.

Accordingly, the present invention was created to solve the above problems, and stores a plurality of default signal recording characteristic information in the memory according to the physical characteristics of the optical disc, and is manufactured by a new optical disc manufacturer not previously stored. When is loaded, the optimal recording power and the optimal signal recording method are determined using a plurality of stored default signal recording characteristic information, and the signal recording characteristic information including the determined optimal recording power and the optimal signal recording method is newly added to the memory. Recording as signal recording characteristic information of an optical disc type, and performing data recording using the determined optimal recording power and optimal signal recording method;

When an optical disc manufactured by a new optical disc manufacturer, which is not already stored, is loaded, the optimal recording power and the optimal signal recording method are determined using the default signal recording characteristic information which is stored in plural numbers according to the physical characteristics of the optical disc. Use it to record data,

When an optical disc manufactured by a new optical disc manufacturer is inserted into an optical disc recording apparatus, in order to determine an optimal recording power and an optimal signal recording method using default signal recording characteristic information stored in plural numbers according to the physical characteristics of the optical disc. An object of the present invention is to provide a method of searching for optimal recording information of a recording medium for performing an optimal recording power control process of an optical disk.

1 is a schematic block diagram of a general optical disc recording / playback apparatus;

2 illustrates an example of an EFM (Eight to Fourteen Modulation) signal and a recording pulse;

3 schematically shows a layout of a recordable optical disc;

4 is a view showing an example of the format of Absolute Time In Pre-groove (ATIP) information recorded on a recordable optical disc;

FIG. 5 is a table in which signal recording characteristic information of optical discs for each optical disc manufacturer stored in a memory of the apparatus shown in FIG. 1 and default signal recording characteristic information are provided for a new optical disc in which the signal recording characteristic information is not stored in the memory. Drawing,

6 is a flowchart illustrating a method of determining an optimal recording power and an optimal signal recording method in a conventional optical disc recording apparatus and recording data using the same;

FIG. 7 shows signal recording characteristic information of optical discs for each optical disc manufacturer stored in the system memory of the optical disc recording apparatus, and default signal recording characteristic information for a new optical disc in which the signal recording characteristic information is not stored in the memory. And a table showing the extra blank area in the form of a table,

8A and 8B are a flowchart illustrating a first embodiment of a method of searching for optimal recording information of a recording medium according to the present invention;

9A and 9B are views exemplarily illustrating a method of determining an optimum recording power and an optimal signal recording method according to a first embodiment of the present invention;

FIG. 10 is a table for exemplarily describing a mode in which an optimum recording power and an optimal signal recording method determined for a new optical disc in which no signal recording characteristic information is stored in the memory are recorded in the memory according to the present invention;

11 is a flowchart illustrating a second embodiment of a method of searching for optimal recording information of a recording medium according to the present invention, and FIG. 12 illustrates a determination method of an optimum recording power and an optimal signal recording method according to a second embodiment of the present invention. Illustrated as an example.

※ Explanation of code for main part of drawing

10 optical disc 11: spindle motor

20: optical pickup 30a: digital recording signal processing unit

30b: digital reproduction signal processor 40: channel bit encoder

41: optical drive unit 50: high frequency (R / F) signal processing unit

51: level detector 60: servo unit

70: drive unit 80: microcomputer

According to an aspect of the present invention, a method of searching for optimal recording information of a recording medium includes: a first step of determining a manufacturer of a mounted recording medium; A second step of reading out a plurality of preset optimal record information in response to the non-determination when the manufacturer cannot be determined in the first step; And a third step of searching for optimal recording information for data recording on the mounted recording medium by using the read plurality of optimal recording information.

Here, the recording medium is a write-once optical disc, and the optimal recording information includes a target beta range for a beta value which is an asymmetry of the recording signal and the reproduction signal, reference recording power, and a write strategy. It is preferable. The recording medium is a rewritable optical disc, and the optimal recording information preferably includes a target gamma range, a reference recording power, and a signal recording method for a gamma value that is a modulation degree of a recording signal and a reproduction signal.

Best Mode for Carrying Out the Invention A preferred embodiment of a method for searching for optimal recording information of a recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

First, in the optical disc recording apparatus according to the present invention, since the contents of information stored in the system memory and the control flow of the microcomputer are different from those of the conventional optical disc recording apparatus, and other components are the same, only the different components will be described with reference to FIG. Let's do it.

In the optical disc recording apparatus according to the present invention, the microcomputer 80 loads the loaded optical disc 10 by using signal recording characteristic information [target beta range, reference recording power, signal recording method] for each disc manufacturer stored in the memory. If the optical disk 10 is an optical disk manufactured by a manufacturer that is not stored in advance, a plurality of stored default values are respectively stored for each optical disk characteristic [cyanine-based disk and phthalocyanine-based disk]. Using the signal recording characteristic information [target beta range, reference recording power, signal recording method] to determine the optimal recording power and the optimal signal recording method, and storing the result of the determination in the memory together with a separate default code Control is performed to record data using the determined optimal recording power and optimal signal recording method. Here, the memory is preferably a rewritable nonvolatile semiconductor memory such as an EEPROM, and may be built in the microcomputer 80 or may be provided outside the microcomputer 80.

According to the present invention, as shown in the table in Fig. 7, the optical disk manufacturer by simulating the recording and playback characteristics of the sample of the optical disk known by the device manufacturer in the manufacturing step of the optical disk recording apparatus as shown in the table of FIG. Signal recording characteristic information of optical discs by optical disc manufacturers obtained by obtaining and storing signal recording characteristic information [target beta range, reference recording power, signal recording method] for each; Default signal recording characteristic information (i.e., target beta range, reference recording power, and signal recording method) is recorded for each of the cyanine and phthalocyanine series (physical characteristics) of the optical disc, plural (n in the figure). That is, the memory includes target beta ranges B_A to B_n, reference recording powers P_A to P_n, and signal recording methods WS_A to WS_n for each of a plurality of manufacturers (A-n) codes; The target beta range (B_CD to B_PD), the reference recording power (P_CD to P_PD), and the signal recording method (WS_CD to WS_PD) of the default signal recording characteristic information are recorded in plural numbers according to the physical characteristics of the disc (cyanine and phthalocyanine). It is stored.

The memory has a free space (Blank_1 to Blank_n) for recording default signal recording characteristic information (ie, target beta range, reference recording power, and signal recording method) for the optical disk for the manufacturer not stored in the memory. Assigned.

Next, a first embodiment of a method for searching for optimal recording information of a recording medium according to the present invention will be described with reference to the flows of FIGS. 8A and 8B and FIGS. 1 and 9 to 10.

8A and 8B show a flow of a first embodiment of a method of searching for optimal recording information of a recording medium according to the present invention.

First, signal recording characteristic information (target beta range (B_A to B_n), reference recording power (P_A to P_n) and signals corresponding to each disk manufacturer (Company A to n) as shown in FIG. Recording target (WS_A ~ WS_n)] and target beta range (B_CD1 ~ B_CDn), target recording power (P_CD1 to P_CDn), signal recording method (WS_CD1 to WS_CDn), and target beta range (B_PD1 to B_PDn) for the default code (phthalocyanine default 1 to n) as the phthalocyanine default information. ) And reference recording power (P_PD1 to P_PDn) and signal recording method (WS_PD1 to WS_PDn), and also the default information (ie, target beta range) for the optical disc for the manufacturer not stored in the memory. Power, reference record Call recording method] When the optical disc 10 is loaded in the state where the free spaces (Blank_1 to Blank_n) for recording are allocated (step S300), the microcomputer 80 reads the lead-in area of the loaded optical disc 10 ( Or the lead-out area) to determine the manufacturer of the optical disc 10 from the start address ATIP information frame. That is, since the start time (START TIME) of the lead-in area (or the lead-out area) is different for each optical disc manufacturer, the optical disc manufacturer can be easily determined therefrom (steps S310 to S330).

When it is determined in step S320 that the loaded disk 10 is a disk manufactured by a manufacturer previously stored in the memory, the microcomputer 80 stores the corresponding manufacturer from information previously stored in the memory as shown in FIG. 7. The reference recording power and the signal recording method are read out from the signal recording characteristic information corresponding to the code, and the optimal recording power is determined by performing the OPC (Optical Power Control), and then the determined optimal recording power and the signal recording method are determined. Data is recorded using the data (steps S350 to S390). The steps of determining the optimum recording power and the data recording by the optimum power control are the same as those of steps S150 to S190 in Fig. 6, and description thereof will be omitted.

On the other hand, if it is determined in step S330 that the loaded optical disc 10 is an optical disc manufactured by a manufacturer that does not have the signal recording characteristic information previously stored in the memory, the microcomputer 80 of the loaded optical disc The physical property (cyanine-based or phthalocyanine-based) is checked (step S340).

Thereafter, the microcomputer 80 sets any one of the n cyanine-based default signal recording characteristic information previously stored in the memory as shown in FIG. 7 according to the identified physical characteristics, that is, cyanine-based or phthalocyanine-based. Alternatively, the reference recording power and the signal recording method corresponding to any one of the n phthalocyanine-based default signal recording characteristic information are read out. Here, the microcomputer 80 reads, for example, the cyanine-based default 1 for the cyanine-based optical disc. The phthalocyanine-based optical disc 1 is programmed in this preset and phthalocyanine-based optical disc. For the sake of simplicity, the loaded optical disc 10 is a cyanine-based optical disc. Suppose]. The microcomputer 80 reads the signal recording method WS_CD1 and the reference recording power P_CD1 corresponding to the signal recording characteristic information of the cyanine-based default 1 that is set in correspondence with the loaded cyanine-based optical disc 10, and FIG. As shown in FIG. 9A, the first OPC section A in the test area (see FIG. 3) of the optical disc 10 is scanned while recording power is scanned at a predetermined level based on the read reference recording power P_CD1. ), For example, test recording of the 15ATIP block is performed (step S400).

As described above, in the state where the test data of, for example, 15 ATIP blocks recorded in the first OPC area A of the test area of the optical disc 10 is recorded by the optical driving power varying to a predetermined size, the microcomputer ( 80 controls the optical pickup 20 to sequentially read the recorded test data (step S410).

Subsequently, the microcomputer 80 calculates a beta value of the asymmetry of the recording signal and the reproduction signal, respectively, for the data of, for example, 15 ATIP blocks, which are sequentially read out and filtered by the RF unit 50, and stored in the memory. The target beta range B_CD1 of the signal recording characteristic information of the preset cyanine-based default 1 is read as previously stored, and it is determined whether the calculated beta values are within the target beta range B_CD1. Thereafter, the microcomputer 80 selects write powers corresponding to the calculated beta values within the target beta range B_CD1 (step S420).

Next, the microcomputer 80 obtains the reproduction jitter value for the data recorded with the selected recording powers, and selects the recording power P1 for the recording data having the minimum jitter value as the reference recording power. (Step S430).

Thereafter, the microcomputer 80 reads all of the cyanine-based n-type signal recording methods (for example, WS_CD1 to WS_CDn in FIG. 7) corresponding to the physical characteristics of the optical disc 10 stored in the memory. Using the reference recording power P1 selected in step S430, the signal recording method is selected in the test area (see FIG. 3) of the optical disc 10 in sequence, for example, 3ATIP blocks for each type, as shown in FIG. 9B. Test data recording is performed in the recording section B (step S440).

As described above, while the test data of the signal recording method selection recording section B of the test area of the optical disc 10 is recorded, the microcomputer 80 controls the optical pickup 20 to store the recorded test data. Playback is sequentially performed (step S450 of FIG. 8B).

The microcomputer 80 calculates a beta value for data of, for example, (3 × n) ATIP blocks that are sequentially reproduced and filtered by the RF unit 50, and each beta value is the memory. It is judged whether or not it is within the target better range B_CD1 to B_CDn of the cyanine-based default values 1 to n corresponding to the respective signal recording methods WS_CD1 to WS_CDn used in the step S440 (ie, the signal is stored in the above). It is determined whether each beta value for the data of the 3ATIP block recorded using the recording method WS_CD1 is within the target bettor range B_CD1]. Thereafter, the microcomputer 80 selects signal recording methods for the calculated beta values within the target beta range B_CD1 to B_CDn (step S460).

Next, the microcomputer 80 obtains the reproduction jitter value for the data recorded using the selected signal recording methods, and selects the signal recording method for the recording data having the minimum jitter value as the optimal signal recording method. (Step S470).

Thereafter, the microcomputer 80 generates a default A as a new manufacturer code for the optical disc 10, for example, as shown in FIG. 10, and corresponds to the target beta range and the selected reference recording power and the optimum. For example, the signal recording method is stored in the microcomputer as B_DA, P_DA, WS_DA in the table form of FIG. 10 (step S480). Here, in step S470, it is assumed in FIG. 10 that the signal recording method WS_CD2 is selected, for example, and the target beta range B_DA is the target beta range of the cyanine-based default 2 corresponding to the signal recording method WS_CD2. It is preferable to use (B_CD2) as it is.

Subsequently, the microcomputer 80 records data using the selected optimal recording power and optimal signal recording method (step S500).

Next, a second embodiment of a method of searching for optimal recording information of a recording medium according to the present invention will be described with reference to the flow of FIG. 11 and FIGS. 1, 10, and 12.

FIG. 11 is a flowchart showing only a flow different from the above-described first embodiment in the flow of determining and recording an optimum recording power and an optimal signal recording method of an optical disc according to the second embodiment of the present invention. For the sake of simplicity, only the steps S470 to S640 different from the first embodiment will be described.

After the control of step S460 of the first embodiment, the microcomputer 80 obtains the reproduction jitter value for the data recorded using the selected signal recording methods, respectively, and the signal for the recording data having the minimum jitter value. The recording method is selected as the optimal signal recording method (step S470). In this case, it is assumed that the signal recording method WS_CD2 is selected in step S470 for better understanding.

Thereafter, the microcomputer 80 uses the determined optimal signal recording method (for example, WS_CD2) as shown in FIG. 12, and moves the predetermined level unit up and down about the reference recording power P1 selected in step S430. For example, test data is recorded for, for example, 15 ATIP blocks in the second OPC section C in the test area (see Fig. 3) of the optical disc 10 through a power scan that increases or decreases the recording power value (step S600). ).

As described above, while the test data of, for example, 15 ATIP is recorded in the second OPC area C of the test area of the optical disc 10, the microcomputer 80 controls the optical pickup 20 to record the recorded data. The test data is reproduced sequentially (step S610).

Subsequently, the microcomputer 80 calculates jitter values for the data of, for example, 15 ATIP blocks that are sequentially reproduced and filtered by the RF unit 50, and the calculated jitter value is minimum. The recording power for the ATIP block data is selected as the optimal recording power (step S620).

Next, the microcomputer 80 generates a default A as an unknown manufacturer code for the optical disc 10, for example, as shown in FIG. 10, and corresponds to the target beta range and the selected optimum. The recording power and the optimal signal recording method are stored in the microcomputer as B_DA, P_DA, WS_DA, for example, in the table form of FIG. 10 (step S630). Here, in step S470, it is assumed in FIG. 10 that the signal recording method WS_CD2 is selected, for example, and the target beta range B_DA is the target beta range of the cyanine-based default 2 corresponding to the signal recording method WS_CD2. It is preferable to use (B_CD2) as it is.

Subsequently, the microcomputer 80 records data using the selected optimal recording power and optimal signal recording method (step S640).

In the above-described specific embodiments, the write once disc (CD-R) is described as the optical disc 10 as an example, and the present invention also applies to the case where the optical disc 10 is a rewritable optical disc (CD-RW). In this case, the modulation degree (gamma value) of the recording signal and the reproduction signal is used instead of the asymmetry (β value) of the recording signal and the reproduction signal.

On the other hand, the present invention is not limited to the above-described typical preferred embodiments, but can be carried out in various ways without departing from the gist of the present invention, various modifications, alterations, substitutions or additions are common in the art Those who have knowledge will easily understand. If the implementation by such improvement, change, replacement or addition falls within the scope of the appended claims, the technical idea should also be regarded as belonging to the present invention.

In the method of searching for optimal recording information of a recording medium according to the present invention, the signal recording characteristic information (target beta range and reference recording power and write strategy) is not stored in the system memory of the apparatus. In the case of an optical disc manufactured by a new manufacturer, a plurality of default signal recording characteristic information [target beta range, reference recording power, and signal recording method] are respectively stored according to the physical characteristics of the disc (cyanine disc and phthalocyanine disc). Write strategy)] to select the optimal signal recording method for the recording characteristics of the optical disc, and to select the optimal recording power for the recording characteristics of the optical disc, and to select the optimal signal recording method and the optimal recording power. Is stored in the system's memory and can be used for later data recording. It will be useful inventions that can improve the quality of the recorded data.

Claims (12)

delete delete delete delete A first step of determining a manufacturer of the mounted recording medium; A second step of reading out a plurality of preset optimal record information in response to the non-determination when the manufacturer cannot be determined in the first step; And And searching for optimal recording information for data recording on the mounted recording medium by using the read plurality of optimal recording information. delete delete delete delete delete The method of claim 5, The determination of the manufacturer of the first step is made from information recorded on the recording medium. The method of claim 5, And the plurality of optimum recording information is preset for each type determined according to the physical properties of the recording medium.