KR100555667B1 - Optical disk recoding/reproducing apparatus and method for determining optimal power thereof - Google Patents

Abstract

An optical recording / reproducing apparatus and a method for determining optimal recording power thereof are disclosed. According to the present invention, the optimum recording power is determined by applying different methods according to the user's selection. That is, the data can be recorded more accurately when the optimal recording power is determined in consideration of a plurality of parameters by the user's selection, and the optimal recording power can be determined in a short time when considering a small number of parameters. Thereby, it is possible to meet the requirements of the user according to the user's choice.

Optical Disc, Optimal Recording Power, OPC

Description

Optical recording / reproducing apparatus and method for determining optimal power power}

1 is a block diagram schematically showing an optical recording / reproducing apparatus according to a preferred embodiment of the present invention;

2 is a view showing an example of a recording pulse showing a plurality of parameters according to FIG. 1, and

FIG. 3 is a flowchart schematically illustrating a method of determining an optimal recording power according to FIG. 1.

Explanation of symbols on the main parts of the drawings

100: optical recording / playback device 110: pickup unit

120: RF unit 130: digital signal processing unit

140: servo unit 150: drive unit

152: LD drive unit 154: motor drive unit

160: spindle motor 170: storage unit

180: user input unit 190: control unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording / reproducing apparatus and an optimal recording power determining method thereof, and to an optical recording / reproducing apparatus and its optimum recording power for determining an optimal recording power required for data recording by applying different methods according to the user's selection. It is about a determination method.

Generally, an optical recording / reproducing apparatus records data on an optical disc after performing an OPC (Optimal Power Calibration) operation. The OPC operation determines an optimum recording power suitable for data recording. When the optimum recording power is determined, the optical recording / reproducing apparatus records the data on the optical disc using the light having the determined optimal recording power.

At this time, the conventional optical recording / reproducing apparatus considers the characteristics of the loaded optical disk to determine the optimum recording power suitable for data recording. That is, in the OPC operation, the optimum recording power is determined differently depending on the characteristics of the optical disc (for example, the type of the optical disc, the manufacturer of the optical disc, the chemical properties of the recording film, etc.).

The determination of the optimal recording power is made by performing a recording test in the test area of the optical disc (hereinafter referred to as "PCA"). However, as various types of optical discs are commercially available, the number of parameters (e.g., peak power, erase power, bias power, etc.) necessary for determining the optimum recording power also increases. Thus, it takes a long time to perform the recording test in consideration of the value of each parameter for each characteristic of the optical disc.

Therefore, the conventional optical recording / reproducing apparatus determines the optimal recording power in consideration of only the parameter having the highest priority among the plurality of parameters in order to shorten the time required for the recording test. An example of a high priority parameter is peak power.

However, if the optimal recording power is determined by considering only the high priority parameter, the recording test can be performed in a short time, but the more accurate optimal recording power cannot be determined. As a result, a problem arises in that the user's request for optimal data recording is not met.

Accordingly, an object of the present invention is to provide an optical recording / reproducing apparatus capable of satisfying the user's needs by adaptively selecting a method for determining the optimum recording power according to the user's selection, and a method of determining the optimal recording power thereof. To provide.

In order to solve the above technical problem, an optical recording apparatus according to the present invention, the pickup unit for recording data by irradiating light to the optical disk; A storage unit for storing a table in which reference values of a plurality of parameters for determining an optimal recording power of the irradiated light are set; In the data recording, a user input unit for selecting one of a first recording mode for determining the optimal recording power in consideration of the plurality of parameters and a second recording mode for determining the optimal recording power in consideration of less than a predetermined number of parameters. ; And when the first recording mode is selected, changing a reference value of each parameter set in the table at least once in a predetermined order to perform a plurality of recording tests for each of the parameters, and from the results of the plurality of recording tests, And a controller for determining the optimum recording power by determining an optimal value of a parameter.

In detail, when the first recording mode is selected, the controller changes the value of each parameter at least once according to the priority given to each parameter to perform the at least one recording test for each parameter.

More preferably, when the optimum value of the predetermined parameter is determined, the controller performs the recording test on a parameter having a priority immediately after the predetermined priority in consideration of the determined optimal value of the predetermined parameter.

The controller may perform the recording test by changing a value of a predetermined parameter to which a predetermined priority is assigned at least once, and then the predetermined jitter value corresponding to a minimum jitter value of at least one jitter value that is a result of the recording test. The value of the parameter is determined as the optimum value of the predetermined parameter.

When the second recording mode is selected, the control unit performs at least one recording test by changing at least one reference value of the parameter less than the predetermined number of the plurality of parameters, and performs the predetermined test from the at least one recording test result. The optimum recording power is determined by determining an optimal value of less than a number of parameters.

Preferably, the control unit generates a table consisting of the determined optimal values of the respective parameters so as to correspond to the type of the optical disc, and stores the table in the storage unit.

The table is prepared for each type of the optical disc and stored in the storage unit. The controller reads a table corresponding to the type of the optical disc from the storage unit when one of the first and second recording modes is selected. Perform a recording test to determine the optimal recording power.

Here, the majority parameter includes at least one of peak power, bias power, output time of the peak power, and output time of the bias power.

On the other hand, in order to solve the above technical problem, the optimal recording power determining method for recording data on the optical disk according to the present invention, (a) a plurality of parameters for determining the optimal recording power of the light irradiated on the optical disk Storing a reference value in advance; (b) a first recording mode for determining an optimal recording power for light required for data recording in consideration of a plurality of parameters, and a second recording mode for determining the optimum recording power in consideration of less than a predetermined number of parameters in the data recording; Which one is selected; (c) when the first recording mode is selected, performing a plurality of recording tests for each parameter by changing the reference values of the plurality of parameters set in the table at least once in a predetermined order to determine the optimal recording power. ; (d) determining an optimum value of each parameter in the predetermined order from the results of the plurality of recording tests performed for each parameter; And (e) determining an optimal recording power of the light based on the determined optimal value of each parameter.

Preferably, in the step (c), if the first recording mode is selected, the at least one recording test is performed for each parameter by changing the value of each parameter at least once according to the priority given to each parameter. To perform.

In the step (c), when the first recording mode is selected, the optimum value of the predetermined parameter having a predetermined priority is determined, and the priority immediately after the predetermined priority is determined in consideration of the determined optimal value of the predetermined parameter. The recording test is performed on the parameters.

More specifically, the step (d) may be performed by changing the value of the predetermined parameter corresponding to a minimum jitter value among at least one jitter value that is a result of the recording test performed by changing the value of the predetermined parameter at least once. The optimal value of the predetermined parameter is determined.

In the step (d), a table composed of optimum values of the parameters determined in the predetermined order is created and stored so as to correspond to the type of the optical disc.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a block diagram schematically showing an optical recording / reproducing apparatus according to a preferred embodiment of the present invention.

Referring to FIG. 1, the optical recording / reproducing apparatus 100 according to the present invention includes a pickup unit 110, an RF unit 120, a digital signal processing unit 130, a servo unit 140, a driving unit 150, and a spindle. The motor 160, the storage unit 170, the user input unit 180, and the controller 190 are provided.

First, the optical recording / reproducing apparatus 100 shown in FIG. 1 is a device for more precisely determining the optimum recording power determination according to a user's selection. The optical recording / reproducing apparatus 100 shown in FIG. 1 will be described with reference to a block performing a function related to the present invention.

The pickup unit 110 irradiates light onto the optical disc 100a to record data, and reads out data recorded on the optical disc 100a. To this end, the pickup unit 110 includes a laser diode (LD) for irradiating light having a predetermined recording power to the optical disk 100a, an objective lens for connecting light irradiated from the LD to the surface of the optical disk 100a, and focusing. A focusing actuator for vertically driving the objective lens, a tracking actuator for driving the objective lens left and right for tracking, and a photo diode (PD) for detecting light reflected from the surface of the optical disc 100a.

The RF unit 120 amplifies and waveform-forms an RF signal output from the pickup unit 110 and provides a modulated signal, for example, an EFM (Eight to Fourteen Modulation) signal, to the digital signal processor 130. In addition, the RF unit 120 detects a focusing error (hereinafter referred to as "FE") signal and a tracking error (hereinafter referred to as "TE") signal from the RF signal, and detects the detected FE signal and TE. The signal is applied to the servo unit 140 and the control unit 190.

In the regeneration mode, the digital signal processor 130 digitally processes the EFM signal output from the RF unit 120 and outputs the reproducible signal.

In the recording mode, when the recording command signal is received from the control unit 190, the digital signal processing unit 130 converts the test signal for setting the optimal recording power of the light into test data that can be recorded on the optical disc 100a. In addition, in the recording mode, the digital signal processor 130 processes the recording target signal and outputs the signal as a recordable signal. Here, the optimum recording power is the recording power of the light required for data recording, and is determined in consideration of the characteristics of the optical disc 100a, a number of parameters, the ambient temperature, and the like.

The servo unit 140 controls the focusing servo and the tracking servo according to the TE signal and the FE signal output from the RF unit 120. In addition, the servo unit 140 controls the LD driver 152 for driving the LD and the motor driver 154 for driving the spindle motor 160.

The driving unit 150 includes an LD driving unit 152 and a motor driving unit 154.

The LD driver 152 drives the LD under the control of the servo unit 140. In detail, the LD driver 152 drives the LD to irradiate light having a set recording power when data is recorded on the optical disc 100a, and has a predetermined reproduction power when reproducing data recorded on the optical disc 100a. The LD is driven to irradiate light.

The motor driver 154 supplies a drive voltage for rotating / stopping the spindle motor 160 to the spindle motor 160 according to the rotation / stop signal output from the servo unit 140. As a result, the spindle motor 160 rotates or stops at a constant linear velocity (hereinafter referred to as "CLV"). The spindle motor 160 is a motor that rotates or stops the optical disc 100a at a predetermined speed.

The storage unit 170 includes a ROM in which a control program for controlling the operation of the optical recording / reproducing apparatus 100 is stored, and a RAM for temporarily storing data generated during the operation.

In the present invention, the storage unit 170 stores a plurality of combination tables. The combination table is a table in which a write strategy required for determining the optimal recording power of light irradiated from the LD, that is, a reference value of a plurality of parameters is set, and is stored for each type of the optical disc 100a.

Here, as shown in FIG. 2, a plurality of parameters include power elements such as peak power (P _P ) and bias power (Bias Power, P _B ) that form a recording pulse, and delay pulse time. (T _D ), Peak Pulse Time (T _P ), Cooling Pulse Time (T _C ), and Last Pulse Time (T _L ).

In FIG. 2, identification information P is a mark area where data is recorded, peak pulse time T _P is an output time of peak power P _P , and cooling pulse time T _C is an output of bias power P _B. It means time.

The user input unit 180 is a user interface that outputs a signal for selecting or performing a function supported by the optical recording / reproducing apparatus 100 to the controller 190. To this end, the user input unit 180 includes a plurality of operation keys (not shown), for example, a remote controller (not shown).

In the present invention, the user input unit 180 records data after determining the optimal recording power in consideration of a plurality of parameters (P _P , P _B , T _D , T _P , T _C , T _L ) during data recording. The optimum recording power is determined in consideration of the first recording mode and less than a predetermined number of parameters, and then a selection signal for any one of the second recording modes for recording data is output.

In more detail, in the first recording mode, after checking the combination table corresponding to the type of the optical disc 100a, a plurality of parameters P _P , P _B , T _D , T _P , T _C constituting the identified combination table , T _L ) to determine the optimal recording power of light.

In the second recording mode, after confirming the combination table corresponding to the type of the optical disc 100a, the first of the plurality of parameters P _P , P _B , T _D , T _P , T _C , T _L constituting the identified combination table is preferred. In this mode, the optimum recording power is determined in consideration of a parameter having a lower rank than a predetermined number (for example, P _P ).

Thus, the time required for determining the optimum recording power when the first recording mode is selected is longer than the time required for determining the optimum recording power when the second recording mode is selected, but data can be recorded more accurately.

The controller 190 controls the overall operation of the optical recording / reproducing apparatus 100 according to various control programs stored in the storage 170. For example, the controller 190 processes data to be recorded on the loaded optical disc 100a or to reproduce data recorded on the optical disc 100a.

In the present invention, when the optical disc 100a is loaded, the controller 190 determines the type of the loaded optical disc 100a. The type of the optical disc 100a may be determined based on the FE signal output from the RF unit 120 corresponding to the optical disc 100a.

In general, an optical disc is a play-only disc such as a CD-ROM (Compact Disk-ROM) and a DVD-ROM (Digital Versatile Disk-ROM), CD-R (CD-Recordable), DVD-R, etc., depending on whether data can be recorded. Similarly, they can be classified into a disc which can only be written once, and a disc which can be rewritten, such as a CD-RW (CD-Rewritable) or a DVD-RAM.

When the loaded optical disc 100a is capable of recording data, when a predetermined recording mode is selected from the user input unit 180, the controller 190 performs an OPC operation corresponding to the selected recording mode. The OPC operation is an operation for determining an optimal recording power suitable for data recording.

In more detail, when the first recording mode is selected from the user input unit 180, the controller 190 reads the combination table corresponding to the determined type of the optical disc 100a from the storage unit 170. The read combination table has a form as shown in [Table 1].

parameter P _P P _B T _D T _P T _C T _L Combination 1 (Reference Value) 15 mW 6 mW 3ns 6ns 5ns 4ns

In [Table 1], the reference value of each parameter (P _P , P _B , T _D , T _P , T _C , T _L ) set in the combination table includes the type, manufacturer, recording film characteristics, optical recording / This value is calculated in consideration of the optical characteristics and the like of the playback apparatus 100.

The controller 190 performs a plurality of recording tests by changing the reference values of the plurality of parameters P _P , P _B , T _D , T _P , T _C , T _L set in [Table 1] at least once in a predetermined order. do. That is, the controller 190 performs a plurality of recording tests for each parameter P _P , P _B , T _D , T _P , T _C , T _L. The predetermined sequence of changing the reference values of the plurality of parameters (P _P , P _B , T _D , T _P , T _C , T _L ) is given for each parameter (P _P , P _B , T _D , T _P , T _C , T _L Based on the priority given to).

At this time, when the optimum value of the predetermined parameter (for example, P _P ) having a predetermined priority is determined, the controller 190 considers the optimum value of the determined predetermined parameter (for example, P _P ) and has a predetermined priority. A write test is performed on the parameter having a priority immediately after it (for example, P _B ).

That is, the controller 190 of each parameter (P _P, P _B, T _D, T _P, T _C, T _L), the respective parameters from the results of the plurality of the recording test performed by (P _P, P _B, T _D, Determine the optimum values of T _P , T _C , T _L ) in order of priority, taking into account the optimum values of the determined parameters (P _P , P _B , T _D , T _P , T _C , T _L ) and the ambient temperature. Determine the optimal recording power.

Here, the recording test changes the reference value of each parameter (P _P , P _B , T _D , T _P , T _C , T _L ) at least once, and changes each parameter P _P , P _B , T _D , T _P , T _C , T _L ) by recording test data on the optical disc 100a, and then calculating the jitter value from the reproduction signal for the recorded test data.

The controller 190 may determine a value corresponding to the recording test in which the minimum jitter value is calculated among the plurality of recording tests performed for each parameter P _P , P _B , T _D , T _P , T _C , T _L. P _P , P _B , T _D , T _P , T _C , T _L ) The test data is data provided from the digital signal processor 130 and recorded in the PCA of the optical disc 100a.

For example, among the plurality of parameters P _P , P _B , T _D , T _P , T _C , T _L , the peak power P _P is the first priority and the bias power P _B is the second priority. The delay pulse time T _D is the third priority, the peak pulse time T _P is the fourth priority, the cooling pulse time T _C is the fifth priority, and the last pulse time T _L is the sixth priority. The case of changing the value of each parameter (P _P , P _B , T _D , T _P , T _C , T _L ) twice with priority is as follows.

First, the controller 190 reads the combination table shown in Table 1 corresponding to the type of the optical disc 100a from the storage unit 170. In addition, the controller 190 performs a recording test using reference values assigned to each parameter P _P , P _B , T _D , T _P , T _C , T _L. When the first jitter value is calculated by the recording test, the controller 190 changes the value of the peak power P _P having the first priority in a predetermined unit as shown in [Table 2], and other parameters P _B ,. T _D , T _P , T _C , T _L ) is performed while recording test is performed.

parameter P _P P _B T _D T _P T _C T _L Combination 2 16 mW 6 mW 3ns 6ns 5ns 4ns Combination 3 17 mW 6 mW 3ns 6ns 5ns 4ns

Referring to [Table 2], the controller 190 calculates the second jitter value by using the changed value such as 'combination 2'. That is, the controller 190 changes only the peak power P _P value from 15 mW to 16 mW, and keeps other values the same as those set in [Table 1], and then performs a recording test to calculate the second jitter value. do.

When the second jitter value is calculated, the controller 190 performs a recording test while changing the value of the peak power P _P again and maintaining other parameter values. For example, the controller 190 calculates a third jitter value using a value such as 'combination 3'. That is, the controller 190 changes only the value of the peak power P _P from 16 mW to 17 mW and then performs a write test to calculate the third jitter value. At this time, the unit of the changed value is not limited to '1mW'.

Here, the controller 190 sets a value of the peak power P _P applied when the minimum jitter value is calculated among the calculated first to third jitter values as an optimum value of the peak power P _P. For example, if the second jitter value has a minimum value, the controller 190 sets a value (16 mW) of the peak power P _P applied when the second jitter value is calculated to an optimum value of the peak power P _P. do.

When the optimum value of the peak power P _P is determined, the controller 190 determines that the optimum value of the peak power P _P and the reference values of the other parameters P _B , T _D , T _P , T _C , T _L are And a plurality of (for example, three) write tests are performed while changing the reference value of the bias power P _B to which the second priority is given in a predetermined unit.

parameter P _P P _B T _D T _P T _C T _L Combination 4 16 mW 6 mW 3ns 6ns 5ns 4ns Combination 5 16 mW 7 mW 3ns 6ns 5ns 4ns Combination 6 16 mW 8 mW 3ns 6ns 5ns 4ns

That is, the controller 190 calculates the fourth jitter value using the same value as' Combination 4 'in [Table 3], calculates the fifth jitter value using the value of' Combination 5 ', and' Combination 6 The sixth jitter value is calculated using the value of '. In addition, the controller 190 determines a value (eg, 7 mW) of the bias power P _B applied when the minimum jitter value of the fourth to sixth jitter values is calculated, as an optimum value of the bias power P _B. do.

When the optimum value of the bias power P _B is determined, the controller 190 determines the optimum value for the other parameters T _D , T _P , T _C , T _L by the same method as described above.

The controller 190 creates a combination table corresponding to the type of the optical disc 100a by using the determined optimal values of the parameters P _P , P _B , T _D , T _P , T _C , T _L , The created combination table is processed to be stored in the storage unit 170.

Thus, when the recording request signal is received from the user input unit 180 while the currently loaded optical disc 100a is reloaded, the controller 190 stores each parameter P stored in the storage unit 170 as shown in [Table 4]. _P , P _B , T _D , T _P , T _C , T _L )

[Table 4] shows an example of a combination table that stores optimal values of each parameter (P _P , P _B , T _D , T _P , T _C , T _L ).

parameter P _P P _B T _D T _P T _C T _L Optimal value 16 mW 7 mW 3.5ns 6ns 5.5ns 4ns

Referring to [Table 4], the optimum values of each parameter (P _P , P _B , T _D , T _P , T _C , T _L ) suitable for recording data on the loaded optical disc 100a are set. In operation 190, the APC (Auto Laser Diode Power Control) operation is performed in consideration of the optimum value and current ambient temperature of Table 4 to determine the optimum recording power.

The APC operation is an operation of controlling the LD so that the LD outputs light having a constant power even when the ambient temperature changes. The APC operation is implemented in a separate circuit or IC and is not shown in the drawings.

On the other hand, when the second recording mode is selected from the user input unit 180, the controller 190 reads the combination table corresponding to the type of the optical disc 100a from the storage unit 170. When the combination table is read, the controller 190 controls a parameter (for example, less than a predetermined number of parameters P _P , P _B , T _D , T _P , T _C , T _L ) set in the read combination table. Perform a write test on P _P ).

For example, when the second recording mode is selected, the controller 190 reads out a combination table as shown in [Table 1]. The controller 190 changes the reference value of the peak power P _P to which the first priority is given at least once to perform a plurality of recording tests.

That is, the controller 190 performs a recording test by using the reference value of each parameter (P _P , P _B , T _D , T _P , T _C , T _L ) set in [Table 1]. Thereafter, the controller 190 performs a recording test while changing the reference value of the peak power P _P and maintaining the reference value of the other parameters as shown in [Table 2].

The controller 190 determines the optimum value of the peak power P _P from the result of the recording test performed at least once. That is, the controller 190 determines a value of the minimum jitter value of the recording tests corresponding to the combination 1 to the combination 3 as the optimum value of the peak power P _P. The controller 190 determines the optimum recording power in consideration of the determined optimal value of the peak power P _P , the reference value of the other parameters, and the ambient temperature.

FIG. 3 is a flowchart schematically illustrating a method of determining an optimal recording power according to FIG. 1.

1 to 3, first, the controller 190 determines the type of the loaded optical disc 100a (S310). After a predetermined time has elapsed, when the first recording mode is selected from the user input unit 180, the controller 190 determines whether the optical disc 100a is a recordable disc, and then stores the combination table corresponding to the type of the optical disc 100a. 170) (S320, S330). The combination table read in step S330 is a table in which reference values of a plurality of parameters P _P , P _B , T _D , T _P , T _C , T _L are set, and have a form as shown in [Table 1] as an example.

When the step S330 is performed, the controller 190 is a parameter (eg, a first priority given to a plurality of parameters P _P , P _B , T _D , T _P , T _C , T _L ) set in [Table 1] For example, a plurality of write tests are performed on P _P (S340). That is, the controller 190 performs a plurality of recording tests using the values set in [Table 1] and [Table 2].

The controller 190 determines an optimal value of the peak power P _P to which the first priority is given (S350). In this case, the controller 190 determines an optimal value using the jitter value which is the result of the plurality of recording tests performed in step S340.

After the step S350, if the optimal value of each parameter (P _P , P _B , T _D , T _P , T _C , T _L ) is not all determined (S360), the controller 190 controls the remaining parameters (for example, , P _B , T _D , T _P , T _C , and T _L ) are repeated until step S340 and step S350 are performed. For example, the peak power when the optimum value of (P _P) determined, the controller 190 and bias power (P _B) to perform the plurality of recording test for a second prioritized bias power (P _B) Determine the optimal value of.

As a result, when the optimum values of the respective parameters P _P , P _B , T _D , T _P , T _C , and T _L are all determined as shown in [Table 4] (S360), the controller 190 determines each determined parameter (P). _P , P _B , T _D , T _P , T _C , T _L ) is created so that the combination table corresponding to the type of the loaded optical disc 100a is created, and the created combination table is stored in the storage unit 170. The processing is performed (S370).

In addition, the controller 190 determines an optimum recording power by performing APC based on the optimum values of the stored parameters P _P , P _B , T _D , T _P , T _C , T _L and the ambient temperature (S380). ).

When the compensation for the ambient temperature is performed in step S380, the controller 190 processes the data to be recorded using the determined optimal recording power (S390).

On the other hand, if the second recording mode is selected from the user input unit 180 after step S310, the controller 190 checks whether the optical disc 100a determined in step S310 is a recordable disc, and then the combination corresponding to the type of the optical disc 100a. The table is read from the storage unit 170 (S400 and S410). The combination table read in step S410 is a table in which reference values of a plurality of parameters P _P , P _B , T _D , T _P , T _C , and T _L are set, and have a form as shown in [Table 1] as an example.

When step S410 is performed, the controller 190 controls the plurality of parameters P _P , P _B , T _D , T _P , T _C , T _L with respect to the peak power P _P given the first priority. Perform a recording test of (S420). That is, the controller 190 performs a recording test using the values set in [Table 1] and [Table 2]. In addition, the controller 190 determines an optimal value of the peak power P _P using the jitter values that are the result of the plurality of recording tests (S430).

When step S430 is performed, the controller 190 creates a combination table consisting of the determined optimal value of the peak power P _P and reference values of the other parameters P _B , T _D , T _P , T _C , T _L. In operation S440, the created combination table is stored in the storage unit 170. The combination table stored in step S440 corresponds to the type of the loaded optical disc 100a.

The controller 190 performs step S380 based on the determined optimal value of the peak power P _P , the reference value of the other parameters P _B , T _D , T _P , T _C , T _L , and the ambient temperature. After that, data recording is started (S390).

On the other hand, the present invention described above is to determine the optimal recording power for recording the optical disk (100a), of course, can be applied to all devices capable of recording data, such as not only CD and DVD, but also BD.

As described so far, according to the present invention, it is possible to determine the optimum recording power in different ways according to the user's selection. More specifically, when a user wants to record data in a more accurate optimal state, the OPC operation is performed in consideration of a plurality of parameter values required for determining optimal recording power. In addition, when the user wants to record data in a short period of time, the OPC operation is performed in consideration of parameter values less than a predetermined number of the plurality of parameters.

Thus, depending on the user's selection, it is possible to record data in an optimal state even if a large amount of time is required for determining the optimal recording power, or to determine the optimum recording power in a short time although not optimal.

In addition, by storing the optimum values of the determined parameters, the time required for the determination of the optimum recording power can be shortened when recording is requested on the same optical disc afterwards.

Although the present invention has been described in detail with reference to exemplary embodiments above, those skilled in the art to which the present invention pertains can make various modifications to the above-described embodiments without departing from the scope of the present invention. I will understand. Therefore, the scope of the present invention should not be limited to the embodiments described, but should be determined not only by the claims below but also by the equivalents of the claims.

Claims (15)

A pickup unit for recording data by irradiating light onto the optical disc; A storage unit for storing a table in which reference values of a plurality of parameters for determining an optimal recording power of the irradiated light are set; In the data recording, a user selecting one of a first recording mode for determining the optimal recording power in consideration of the plurality of parameters and a second recording mode for determining the optimal recording power in consideration of less than a predetermined number of parameters. An input unit; And When the first recording mode is selected, the reference value of each parameter set in the table is changed at least once in a predetermined order to perform a plurality of recording tests for each of the parameters, and from the results of the plurality of recording tests, And a controller configured to determine an optimal value of a parameter to determine the optimal recording power, and to generate a table including the determined optimal value of each parameter to correspond to the type of the optical disc, and to store the table in the storage unit. Device. The method of claim 1, When the first recording mode is selected, the controller changes the value of each parameter at least once according to the priority given to each parameter to perform the at least one recording test for each parameter. Logger. The method of claim 2, The controller may perform the recording test on a parameter having a priority immediately after the predetermined priority in consideration of the optimum value of the determined parameter when the optimal value of the parameter having the predetermined priority is determined. Optical recording device. The method of claim 3, wherein The controller may be further configured to change the value of the parameter to which the predetermined priority is assigned at least once to perform the recording test, and then to determine the minimum jitter value of the at least one jitter value that is the result of the recording test. And determining a value as said optimum value. The method of claim 1, When the second recording mode is selected, the controller performs at least one recording test by changing at least one reference value of the parameter less than the predetermined number of the plurality of parameters, and performing the at least one recording test from the at least one recording test result. And determining the optimum recording power by determining an optimum value of less than a predetermined number of parameters. delete The method of claim 1, The table is prepared for each type of the optical disc and stored in the storage unit. The controller reads a table corresponding to the type of the optical disc from the storage unit when one of the first and second recording modes is selected. And a recording test for determining an optimum recording power. The method of claim 1, And the plurality of parameters comprises at least one of peak power, bias power, output time of the peak power, and output time of the bias power. In the method for determining optimal recording power for recording data on an optical disc, (a) pre-stored reference values of a plurality of parameters for determining an optimal recording power of light irradiated onto the optical disc; (b) a first recording mode for determining an optimal recording power for light required for data recording in consideration of a plurality of parameters and a second recording mode for determining the optimum recording power in consideration of less than a predetermined number of parameters in the data recording; Any one of is selected; (c) when the first recording mode is selected, performing a plurality of recording tests for each parameter by changing the reference values of the plurality of parameters set in the table at least once in a predetermined order to determine the optimal recording power. step; (d) determining an optimum value of each parameter in the predetermined order from the results of the plurality of recording tests performed for each of the parameters, and storing a table of the optimum values of each parameter determined in the predetermined order of the optical disc. Creating and storing corresponding to a type; And (e) determining an optimal recording power of the light based on the determined optimal value of each parameter. The method of claim 9, In the step (c), when the first recording mode is selected, the at least one recording test is performed for each parameter by changing the value of each parameter at least once according to the priority given to each parameter. Optimal recording power determination method. The method of claim 10, In the step (c), if the first recording mode is selected, after determining an optimal value of a parameter having a predetermined priority, the parameter having a priority immediately after the predetermined priority in consideration of the optimal value of the determined parameter And determining the optimal recording power. The method of claim 11, In the step (d), the optimum value is determined as a value of the parameter corresponding to a minimum jitter value among at least one jitter value which is a result of the recording test performed by changing the value of the parameter at least once. Optimal recording power determination method. delete The method of claim 9, And said table is created and stored for each type of said optical disc. The method of claim 14, In the step (c), when one of the first and second recording modes is selected, a reading test is performed to determine a optimum recording power by reading a table corresponding to the type of the optical disc. How to determine record power.

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