JP2006302402A - Disk recording and reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to perform test recording simply based on medium information recorded in an optical disk, compute optimum recording conditions from compatibility of an optical pickup and an optical disk, and raise performance in recording information data on an optical disk. <P>SOLUTION: Recording medium information being recorded on an optical disk is read; and collated with recording conditions of known recording medium of a similar type in parameters of recording conditions for each type of a plurality of stored and set up beforehand and known recording medium; the recording conditions to the optical disk are computed; test recording of predetermined test data is carried out based on computed recording conditions to the optical disk and reproduced; an error rate of an RF signal of reproduced test data and jitters are measured; and when the measured error rate and jitter are within the limits of predetermined values, it is made to be stored as a recording conditions to the optical disk. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a disk recording / reproducing apparatus for recording / reproducing information data on / from an optical disk, and more particularly to a disk recording / reproducing apparatus that can also be applied to an optical disk of a new phase change recording medium.

Conventionally, after a disc recording / playback apparatus is commercialized and shipped to the market, when a new phase change recording medium optical disc is released, the recording conditions for the optical disc are not considered at the time of design. When mounted on a playback device, the optical disk is determined to be an unknown optical disk, and recording conditions are calculated from recording medium information recorded on the optical disk, and information data is recorded on the optical disk. Therefore, when information data is recorded under the recording conditions calculated from the recording medium information, the characteristics of the optical pickup are not necessarily the optimum recording conditions of the optical disc, and the recording performance is deteriorated and the recording quality of the information data is deteriorated. There was a problem of doing.
As a background art, a plurality of data is written on an optical disc with different writing setting values such as a strategy and a laser power setting value for each data, and recording quality such as a jitter value and an error rate of each of the plurality of written data is recorded. There is one in which information is measured and data is written to the optical disc with an optimum write setting value (see, for example, Patent Document 1).
Also, a recording pulse signal is generated based on the test recording data, test recording is performed while changing the level of the cooling pulse in the recording pulse signal, the test recording data is reproduced, the waveform of the reproduction signal is evaluated, There is one in which a cooling level at which an asymmetry value is obtained is set as an optimum cooling level (see, for example, Patent Document 2).
Also, the recording signal pulse width is relatively shortened, the recording power is set to a value that provides an appropriate asymmetry value, recording is performed with relatively reduced jitter, and the recording signal pulse width is relatively reduced. There is one in which the recording power is set to a value that can obtain an appropriate asymmetry value, and recording is performed with relatively reduced crosstalk (see, for example, Patent Document 3).
JP 2004-296068 A JP 2004-55115 A JP 2004-259390 A

However, in the first one described in the background art, a plurality of data is written on the optical disc with different writing setting values such as a strategy and a laser power setting value for each data, and each of the plurality of data written is written. Recording quality information such as jitter value and error rate was measured, and data could be written to the optical disc with the optimum write setting value. However, writing to the optical disc with different write setting values such as strategy and laser power setting value was possible. However, since the recording quality information such as the jitter value and error rate of each piece of data was measured and the optimum write setting value was set, a complicated process was required to write the data. There was a problem.
In the following, a recording pulse signal is generated based on the test recording data, test recording is performed while changing the level of the cooling pulse in the recording pulse signal, the test recording data is reproduced, and the reproduction signal is reproduced. The cooling level at which the waveform was evaluated and the target asymmetry value was obtained could be set as the optimum cooling level, but test recording was performed while changing the cooling pulse level in the recording pulse signal to obtain the target asymmetry value. Since the cooling level to be set is set as the optimum cooling level, there is a problem that it takes time to write data.
Further, in the following, the recording signal pulse width is relatively shortened, the recording power is set to a value that can obtain an appropriate asymmetry value, recording is performed with relatively reduced jitter, and recording is performed. Although the signal pulse width was made relatively long and the recording power was set to a value that would give an appropriate asymmetry value, recording could be performed with relatively reduced crosstalk. If the compatibility does not match, there is a problem that information data cannot be recorded on the optical disc under the optimum condition if the optimum recording condition is not changed even if the recording condition is changed.
The present invention has been made in view of such problems of the background art, and the object of the present invention is to simplify test recording based on medium information recorded on an optical disc, It is an object of the present invention to provide a disc recording / reproducing apparatus that can improve the recording performance of information data on an optical disc by calculating optimum recording conditions from the compatibility with the optical disc.

In order to achieve the above object, in the present invention, a disc recording / reproducing apparatus for recording / reproducing information data on an optical disc, which stores parameters of recording conditions for each type of a plurality of preset known recording media Reading means for reading the recording medium information recorded on the optical disc, and checking the recording medium information read by the reading means against the recording conditions of a similar type of known recording medium stored in the storage means Then, a first calculation means for calculating a recording condition for the optical disc, a predetermined test data is recorded on the optical disc based on the recording condition calculated by the first calculation means and reproduced, and the reproduced test is performed. Measuring means for measuring error rate and jitter of data RF signal, and error rate and jitter measured by said measuring means are predetermined. A first discriminating unit that discriminates whether or not the value is within a range; and the first discriminating unit discriminates that the error rate and jitter measured by the measuring unit are values within a predetermined range. Storage means for storing as recording conditions for the optical disc.
Further, when the first discriminating unit discriminates that the error rate and jitter measured by the measuring unit are not values within a predetermined range, the modulation degree and β value are calculated from the RF signal of the reproduced test data. Second calculation means, modulation degree and β value calculated by the second calculation means, parameters of the recording conditions of the same type of known recording medium stored in the storage means, and β value A second determination means for determining whether or not the same as the first and the second determination means, the modulation degree and β value calculated by the second calculation means are stored in the storage means If it is determined that the modulation degree and β value of the recording condition parameter of the known type recording medium are not the same as the β value, the recording power is set so that the modulation degree and β value of the recording condition parameter of the same type of known recording medium are obtained. Setting means to set Provided.
The storage means may be a flash ROM.
By these means, test recording is simplified based on the medium information recorded on the optical disc, and the optimum recording condition is calculated from the compatibility between the optical pickup and the optical disc, thereby improving the recording performance of information data on the optical disc. Can be made.

According to the disk recording / reproducing apparatus of the first aspect, the recording medium information recorded on the optical disk is read, and the read recording medium information is stored in the flash ROM in a plurality of preset values. A recording condition for an optical disc is calculated by collating with a recording condition of a known recording medium of a similar type among parameters of a recording condition for each type of known recording medium, and a predetermined condition is determined based on the calculated recording condition. Test data is recorded on the optical disc and reproduced, and the error rate and jitter of the RF signal of the reproduced test data are measured to determine whether the measured error rate and jitter are values within a predetermined range. When it is determined that the measured error rate and jitter are values within a predetermined range, they are stored as recording conditions for the optical disc. Therefore, it is possible to simplify the test recording based on the medium information recorded on the optical disc, calculate the optimum recording condition from the compatibility between the optical pickup and the optical disc, and improve the recording performance of the information data on the optical disc. it can. Further, when it is determined that the measured error rate and jitter are not within the predetermined range, the modulation factor and β value are calculated from the RF signal of the reproduced test data, and the calculated modulation factor and β value are calculated. Is the same as the modulation degree and β value of the parameter of the recording condition of a known recording medium of the same type stored in the flash ROM, and the calculated modulation degree and β value are Modulation degree of recording condition parameter of similar recording medium of similar type stored in ROM, if it is determined that it is not the same as β value, modulation degree of recording condition parameter of similar recording medium of similar type Since the recording power is set so as to have a β value, if the measured error rate and jitter are not within the predetermined range, the recording condition parameters of the same type of known recording medium Modulation, by setting the recording power to be β values, it is possible to improve the recording performance of the optical disc information data.
According to the disk recording / reproducing apparatus of the second aspect of the invention, the recording medium information recorded on the optical disk is read out, and a plurality of preset known recordings in which the read recording medium information is stored The recording condition of each type of medium is compared with the recording conditions of a known type of recording medium of the same type, the recording condition for the optical disk is calculated, and predetermined test data is recorded on the optical disk based on the calculated recording condition. Test recording and playback, and measure the error rate and jitter of the RF signal of the reproduced test data to determine whether the measured error rate and jitter are values within a predetermined range, and then measure If the measured error rate and jitter are determined to be within the predetermined range, they are stored as recording conditions for the optical disc. Based on the recorded and media information carried by simplifying the test recording, and calculates the optimum recording condition from compatibility with the optical pickup and the optical disk, it is possible to improve the recording performance of the optical disc information data.
According to the disc recording / reproducing apparatus of the third aspect of the present invention, when it is determined that the measured error rate and jitter are not values within the predetermined range, the modulation factor, β Calculate the value, determine whether the calculated modulation degree and β value are the same as the modulation degree and β value of the parameter of the recording condition of a known recording medium of the same type where the β value is stored. Recording of the same type of known recording medium when it is determined that it is not the same as the modulation degree and β value of the recording condition parameter of the same type of known recording medium in which the β value is stored. Since the recording power is set so that the modulation factor and β value of the parameter of the condition are the same, if the measured error rate and jitter are not values within a predetermined range, a similar type of known recording medium Parameters of recording conditions Other modulation, by setting the recording power to be β values, it is possible to improve the recording performance of the optical disc information data.
According to the disc recording / reproducing apparatus of the fourth aspect of the present invention, the recording condition parameters for each of the plurality of types of preset known recording media are stored. Condition parameters can be easily added or changed.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a block diagram showing the configuration of a disk recording / reproducing apparatus according to an embodiment of the present invention. FIG. 2 shows recording conditions of a plurality of recording media set in advance in the disk recording / reproducing apparatus according to an embodiment of the present invention. FIG. 3 is an explanatory diagram showing an example of a list of parameters, and FIG. 3 is a flowchart showing an operation of setting recording conditions for the optical disc of the disc recording / reproducing apparatus of one embodiment of the present invention.
First, a description will be given based on the block diagram showing the configuration of the disk recording / reproducing apparatus of one embodiment of the present invention shown in FIG.
The disc recording / reproducing apparatus 1 records information data on the optical disc 2 by irradiating the recording surface of the optical disc 2 with laser light, and irradiates the recording surface of the optical disc 2 with laser light to detect the reflected light. An optical pickup 3 for reading information data recorded on the optical disk, a spindle motor 4 for rotating the optical disk 2, a spindle servo circuit 5 for driving the spindle motor 4 to servo-control the rotational speed of the optical disk 2, and the optical pickup 3 for the optical disk. 2, a thread servo circuit 7 that servo-controls the rotation direction and rotation speed of the thread motor 6, and tracking of the optical pickup 3 based on a tracking error signal detected by the optical pickup 3. Tracking servo circuit 8 for servo control and optical pick A focus servo circuit 9 that servo-controls the focus of the optical pickup 3 based on the focus error signal detected by the optical pickup 3 and an RF signal of information data read by the optical pickup 3 are amplified and recorded on the optical disc 2 The RF amplification circuit 10 that amplifies the RF signal of the information data to be amplified, and the RF signal of the information data amplified by the RF amplification circuit 10 is synchronously detected and demodulated based on the reference clock, and the error of the demodulated information data is corrected Then, the information data compressed based on a predetermined compression method is decompressed and decoded to reproduce the information data recorded on the optical disc 2, and the information data is encoded and compressed based on the predetermined compression method. Signal processing circuit 11 and optimum recording power control of the recording power of the laser beam for recording information data on the optical disc 2 A write control circuit 12, a microcomputer 13 for controlling the entire system of the disk recording / reproducing apparatus 1, and parameters of recording conditions (recording power Pw, erasing power Pe, 3T pulse width, 4T pulse width, 5T to 14T pulse width, multi-pulse width Tmp, cooling pulse width Tcl, RF signal modulation factor, RF signal level ratio β value (see FIG. 2). A flash ROM (Read Only Memory) 14 of the memory and a RAM (Random Access Memory) 15 for temporarily storing recording conditions for recording information data on the optical disc 2 are configured.
The operation of the disk recording / reproducing apparatus configured as described above will be described below.
When the optical disk 2 is loaded into the disk recording / reproducing apparatus 1, the microcomputer 13 sends a control signal to the spindle servo circuit 5, drives the spindle motor 4 to rotate the optical disk 2, and sends a control signal to the thread servo circuit 7. , The sled motor 6 is rotated to move the optical pickup 3 to the innermost circumference of the optical disk 2, and control signals are transmitted to the tracking servo circuit 8 and the focus servo circuit 9, and the optical pickup 3 is driven by the optical pickup 3. Is recorded on the same type or similar type, for example, the optical disc 2, in the recording conditions of a plurality of known recording media stored in the flash ROM 14. Recording of type 2 recording medium in which recording medium information is preset and stored in flash ROM 14 If it is similar to the matter, the matching to (see FIG. 2) and the recording conditions of the recording medium type 2 stored in the flash ROM 14, calculates a recording condition with respect to the disk recording and reproducing apparatus the optical disc 2 mounted on the 1.
When the recording conditions for the optical disk 2 mounted on the disk recording / reproducing apparatus 1 are calculated, the microcomputer 13 sends a control signal to the write control circuit 12, and the optical pickup 3 uses the optical pickup 3 based on the calculated recording conditions. 2, predetermined test data is recorded on the test, the test data recorded on the test is reproduced, and the error rate and jitter of the RF signal of the reproduced test data are measured. When the measured error rate and jitter are values within a predetermined range, the microcomputer 13 stores the recording condition in the RAM 15 as a recording condition for the optical disk 2 of the recording medium loaded in the disk recording / reproducing apparatus 1. When the recording of the information data on the optical disk 2 is instructed, the microcomputer 13 records the information data on the optical disk 2 with the optimum recording power based on the recording conditions for the optical disk 2 stored in the RAM 15.
When the measured error rate and jitter are not values within the predetermined range, the microcomputer 13 calculates the modulation degree and β value from the RF signal of the reproduced test data, and calculates the calculated modulation degree and β value. Are compared with the recording conditions of a similar type of recording medium among the recording conditions of a plurality of known recording media stored in the flash ROM 14. If the calculated modulation degree and β value are not the same as the modulation degree and β value of the recording condition of the known recording medium, the microcomputer 13 determines the modulation degree and β value of the recording condition of the same type of known recording medium. The optimum recording power is set so as to become, the control signal is sent to the write control circuit 12, the test recording and reproduction of predetermined test data on the optical disc 2 are repeated, and the recording condition of the optical disc 2 is set, The recording conditions for the optical disc 2 are stored in the RAM 15. As a result of repeating the test recording, when the calculated modulation degree and β value are the same as the modulation degree and β value of the recording condition of the known recording medium, the microcomputer 13 determines the characteristics of the optical pickup 3 and the disc recording / reproduction. It is determined that the characteristics of the optical disk 2 of the recording medium mounted on the apparatus 1 do not match, and recording of information data on the recording medium is stopped.
Further, description will be made based on the flowchart showing the recording condition setting operation for the optical disc of the disc recording / reproducing apparatus of one embodiment of the present invention shown in FIG.
When the optical disc is mounted on the disc recording / reproducing apparatus, the process proceeds from step S1 to step S2, and in step S2, the recording medium information is read from the optical disc and recorded on a plurality of known recording media stored in the flash ROM. The recording conditions for the same type of recording medium in the conditions are compared, the recording conditions for the optical disc mounted on the disc recording / reproducing apparatus are calculated, and the process proceeds to step S3.
In step S3, predetermined test data is test-recorded on the optical disc based on the calculated recording conditions, the test-recorded test data is reproduced, and the error rate and jitter of the RF signal of the reproduced test data are measured. Then, the process proceeds to step S4.
In step S4, it is determined whether or not the measured error rate and jitter are values within a predetermined range. If the measured error rate and jitter are values within a predetermined range, the process proceeds to step S9. If the measured error rate and jitter are not values within the predetermined range, the process proceeds to step S5.
In step S5, the modulation factor and β value are calculated from the RF signal of the reproduced test data, and the process proceeds to step S6.
In step S6, the calculated modulation degree and β value are compared with the recording conditions of a similar type of recording medium among the recording conditions of a plurality of known recording media stored in the flash ROM, and the calculated modulation It is determined whether or not the β value is the same as the modulation degree of the recording condition of the recording medium and the β value, and the calculated modulation degree, the modulation value of the recording condition of the recording medium of which the β value is known, β If it is the same as the value, the process proceeds to step S8, and if the calculated modulation degree and β value are not the same as the modulation degree and β value of the recording condition of the known recording medium, the process proceeds to step S7.
In step S7, the optimum recording power is set so that the modulation value and β value of the recording conditions of a similar type of known recording medium among the recording conditions of a plurality of known recording media stored in the flash ROM are obtained. Returning to step S3, the steps from step S3 are repeated.
In step S8, it is determined that the characteristics of the optical pickup and the characteristics of the recording medium do not match, recording of the information data on the recording medium is stopped, and the process proceeds to step S10 and the process is terminated.
In step S9, the recording conditions for the recording medium loaded in the disk recording / reproducing apparatus are stored in the RAM, and the process proceeds to step S10 to end the process.
Although the best mode for carrying out the present invention has been described in detail above, the present invention is not limited to this, and modifications and improvements can be made within the ordinary knowledge of those skilled in the art. Needless to say.

It is a block diagram which shows the structure of the disc recording / reproducing apparatus of one Example of this invention. It is explanatory drawing which shows the example of a list of the parameters of the recording conditions of the several preset recording medium of the disc recording / reproducing apparatus of one Example of this invention. It is a flowchart which shows the setting operation | movement of the recording condition with respect to the optical disk of the disk recording / reproducing apparatus of one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc recording / reproducing apparatus 2 Optical disc 3 Optical pick-up 4 Spindle motor 5 Spindle servo circuit 6 Thread motor 7 Thread servo circuit 8 Tracking servo circuit 9 Focus servo circuit 10 RF amplifier circuit 11 Signal processing circuit 12 Write control circuit 13 Microcomputer 14 Flash ROM
15 RAM

Claims (4)

A disc recording / reproducing apparatus for recording / reproducing information data on an optical disc,
A flash ROM for storing parameters of recording conditions for each type of a plurality of preset known recording media, a reading means for reading recording medium information recorded on an optical disc, and a recording medium read by the reading means The first calculation means for checking the recording conditions for the optical disc by comparing the information with the recording conditions of a known type of recording medium of the same type stored in the flash ROM, and calculated by the first calculation means Measurement means for recording and reproducing predetermined test data on an optical disc based on recording conditions, measuring the error rate and jitter of the RF signal of the reproduced test data, and the error rate and jitter measured by the measurement means First determining means for determining whether or not is a value within a predetermined range, and the first determining means is determined by the measuring means When it is determined that the determined error rate and jitter are values within a predetermined range, the storage means for storing as a recording condition for the optical disc, and the error rate and jitter measured by the measurement means by the first determination means Is determined not to be a value within a predetermined range, the modulation factor calculated from the RF signal of the reproduced test data, the second calculation means for calculating the β value, the modulation factor calculated by the second calculation means, second discrimination means for discriminating whether or not the β value is the same as the degree of modulation of the parameter of the recording condition of a known recording medium of the same type stored in the flash ROM, and the second value; The modulation degree calculated by the second calculation means, the β value is stored in the flash ROM, and the modulation degree of the parameter of the recording condition of the same type of known recording medium, β value A disc recording / reproducing apparatus comprising: setting means for setting a recording power so as to obtain a modulation factor and a β value of a recording condition parameter of a similar recording medium of a similar type . A disc recording / reproducing apparatus for recording / reproducing information data on an optical disc,
Storage means for storing parameters of recording conditions for each type of a plurality of preset known recording media, reading means for reading recording medium information recorded on the optical disc, and recording medium read by the reading means The first calculation means for calculating the recording condition for the optical disc by comparing the information with the recording condition of a known type of recording medium of the same type stored in the storage means, and calculated by the first calculation means Measurement means for recording and reproducing predetermined test data on an optical disc based on recording conditions, measuring the error rate and jitter of the RF signal of the reproduced test data, and the error rate and jitter measured by the measurement means A first determination means for determining whether or not the value is within a predetermined range, and an error measured by the measurement means by the first determination means Over DOO, if jitter is determined to be a value within a predetermined range, the disk recording and reproducing apparatus characterized by comprising a storage means for storing a recording condition for the optical disk. When the first discriminating unit discriminates that the error rate and jitter measured by the measuring unit are not values within a predetermined range, a second modulation factor and β value are calculated from the RF signal of the reproduced test data. And the modulation degree and β value calculated by the second calculation means are the same as the modulation degree and β value of the parameters of the recording conditions of the same type of known recording medium stored in the storage means. A second type determining unit that determines whether or not the same, and a modulation type and a β value calculated by the second calculating unit by the second calculating unit are stored in the storage unit. When it is determined that the modulation level and β value of the recording condition parameter of the known recording medium are not the same, the recording power is set so that the modulation level and β value of the recording condition parameter of the same type of known recording medium are obtained. And further setting means Disk recording and reproducing apparatus according to claim 2, wherein the was e. 3. The disk recording / reproducing apparatus according to claim 2, wherein the storage means is a flash ROM.

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