JP4120984B2 - Disc recording / reproducing apparatus and method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk recording / reproducing apparatus and a disk recording / reproducing method. Related In particular, a disk recording / reproducing apparatus and a disk recording / reproducing method for performing an OPC (Optimum Power Control) operation for obtaining optimum recording conditions (that is, optimum recording laser power conditions) for recording information on the disk as well as Disc recording / playback program Related To do. For example, a disc recording / reproducing apparatus and a disc recording / reproducing method for performing an OPC operation for obtaining an optimum recording condition for a rewritable disc represented by CD-RW and DVD-RW as well as The present invention relates to a disc recording / reproducing program and a program recording medium.
[0002]
[Prior art]
Recently, recordable magneto-optical disks and optical disks are widely used as recording media having a disk shape. In order to ensure the reliability of information recorded on such a magneto-optical disk or optical disk (hereinafter abbreviated as a disk), a disk recording / reproducing apparatus that performs an operation of recording information on the disk, Prior to the information recording operation on the disc, an OPC (Optimum Power Control) operation, which is an operation for obtaining an optimum recording laser power (that is, an optimum recording condition for recording information on the disc), is performed. It is often configured so that it can be performed.
[0003]
Here, the OPC operation changes a recording condition for a sector provided in a predetermined position on the disk, that is, a sector at a predetermined position formed in a recording area on the disk (hereinafter referred to as an OPC area). OPC information consisting of a random pattern or a specific fixed pattern (that is, a pattern specified in advance by the disc manufacturer or the manufacturer or user of the disc recording / reproducing apparatus) is recorded, and thereafter various recording conditions are set immediately. Based on this, the OPC information recorded in the OPC area is reproduced, and a predetermined predetermined parameter is measured using a predetermined measurement method, thereby obtaining an optimum recording laser power ( That is, an operation for detecting and determining an optimum recording condition for recording information on the disc.
[0004]
By performing such an OPC operation, the optimum recording laser power variation generated based on the difference in characteristics between the disc and the pickup of the disc recording / reproducing apparatus, and the optimum recording laser power variation caused by the radial position of the disc. Alternatively, it is possible to compensate for a change factor such as an optimal change in recording laser power caused by a change in ambient temperature, and to ensure the reliability of information recorded on the disc.
[0005]
For example, in order to compensate for the variation in the optimum recording laser power due to the difference in characteristics between the disk and the pickup, the disk is recorded on the disk as in the prior art disclosed in Patent Document 1 or Patent Document 2 below. It is sufficient to perform the OPC operation after the preparation for mounting the information on the reproducing apparatus and the completion of the information recording, that is, after the “disc loading” operation is completed. On the other hand, in order to compensate for the change in the optimum recording laser power due to the change in the ambient temperature, as in the prior art disclosed in Patent Document 1, Patent Document 2, or Patent Document 3, information on the disc is recorded. The OPC operation may be performed when the recording operation is started or when an error is detected, or when a temperature change equal to or greater than a predetermined threshold value is detected.
[0006]
[Patent Document 1]
JP-A-10-112076 (page 5)
[Patent Document 2]
Japanese Patent Laid-Open No. 11-144249 (page 7, FIG. 6)
[Patent Document 3]
Japanese Patent Laid-Open No. 11-045440 (page 7-4, FIG. 8)
[0007]
[Problems to be solved by the invention]
In a disk typified by an optical disk such as a DVD-R, DVD-RW, CD-R, and CD-RW, an OPC area that is a dedicated area for OPC operation having a fixed size is prepared in advance on the inner periphery of the disk. Yes. Since the size of the OPC area is naturally finite, the number of OPC operations that can be performed on one disk is of course limited to a finite number.
[0008]
Therefore, in such a disk to which the OPC area having a finite fixed size is allocated, an optimum recording laser power and an optimum recording pulse width are output in order to ensure the reliability of information recorded on the disk. As much as possible, it is not necessary to acquire the optimum recording conditions (optimum recording laser power and optimum recording pulse width), and unnecessary OPC operations that can be performed every time each information recording operation is started are performed. It is necessary to reduce the number of executions of the OPC operation as much as possible so that the OPC operation can be surely performed when it is suppressed and truly necessary. In particular, in a rewritable disc such as a DVD-RW or CD-RW that can be rewritten (overwritten) or erased, the number of times of recording on one disc is very large, so care must be taken.
[0009]
However, for example, in the prior art as described in Patent Documents 1 and 2, etc., every time a disc is loaded into a disc recording / reproducing apparatus, regardless of the number of times information is recorded on one disc. Since the OPC operation is automatically performed, the amount of consumption of the OPC area becomes intense, and the OPC area already exists in the scene where the recording operation that really requires the OPC operation is not performed. There is a problem that the OPC operation for detecting and determining the optimum recording condition cannot be performed because the state is used up.
[0010]
On the other hand, in the case of a disc recording / reproducing apparatus that records consumer video information, audio information, etc., the recording operation is actually performed after a user's recording request is made (for example, pressing of the recording request button “Rec button”) In order to set the time lag until starting to an ideal state (that is, approximately 0 seconds), the disc is between the time when the recording request is generated and the time when the recording preparation is completed and the actual recording operation starts. Recording information input to the recording / reproducing apparatus (that is, moving picture information and audio information to be recorded requested by the user) is temporarily stored in a buffer memory provided in the disk recording / reproducing apparatus. It is configured as follows. In addition, even when the recording operation is interrupted for some reason, the recording operation input to the disc recording / playback apparatus between the user's recording resumption request and the preparation for resuming the recording operation is completed and the recording operation is started. It is necessary to temporarily store information in the buffer memory in the disk recording / reproducing apparatus.
[0011]
Here, the execution time of a normal OPC operation performed as part of the recording preparation operation at the start of recording information or the resumption of recording is required to be about 100 to 200 msec. Thus, in order to set the time lag from the time when the recording request or the recording resumption request is generated to the time when the recording operation is started to an ideal state (that is, approximately 0 seconds), 100 to 200 msec is set in the disk recording / reproducing apparatus. It is necessary to provide a buffer memory capable of storing moving image information and audio information. Furthermore, not only in such a case, but also during the operation of recording information on the disc, the OPC area provided in the inner periphery of the disc is prepared in case the OPC operation is required as the ambient temperature rises. In addition, a huge amount of buffer memory of several hundred msec to several seconds is required including the access time (seek time that is the moving time from the recording position of the pickup).
[0012]
As described above, when the conventional method of performing the OPC operation at the start or resumption of recording or during the recording operation is also applied to a disc recording / reproducing device for recording consumer video information and audio information, the disc recording / reproducing device The size of the buffer memory to be provided in the disk causes a significant increase, and as a result, the cost of the disk recording / reproducing apparatus increases significantly.
[0013]
Furthermore, in order to perform the OPC operation, a mechanical operation such as access to the OPC area, for example, movement of a pickup between the OPC area and the recording area on the inner periphery of the disc is required. Therefore, the operation time of the OPC operation is likely to vary. In particular, when an access error to the OPC area accompanied by such mechanical operation frequently occurs, the operation time required for the OPC operation becomes extremely long, so that the buffer memory in the disk recording / reproducing apparatus overflows, and the disk Video information and audio information to be recorded in the recording medium are lost, and there is a problem that the recording is interrupted during recording, or that recording is not performed immediately after the recording is started.
[0014]
Also, prior to the operation of recording information (user data) on the disc, physical or logical format information is recorded on the disc, so-called disk initialization operation, or once recorded format. In many cases, so-called reformatting operation is performed to rewrite information.
[0015]
However, in the case of the prior art as described above, in which an OPC operation is performed during an information (user data) recording operation, a recording resuming operation, or a recording operation, prior to such disc initialization operation or reformatting operation, In many cases, the OPC operation for acquiring the optimum recording condition is not performed, and the disk initialization operation or the reformatting operation is executed based on the recommended recording condition recommended by the disk manufacturer. Therefore, as described above, for example, when there is a change in the recording characteristics due to a difference in characteristics between the disk and the pickup of the disk recording / reproducing apparatus or a change in ambient temperature, the disk initialization using the recommended recording conditions is performed. Depending on the operation, the physical and logical format information cannot be recorded correctly on the disc, and in the worst case, the initialization of the disc fails and the disc cannot be used. There is a problem of becoming.
[0016]
The present invention has been made in view of such a problem, and by performing an OPC operation for detecting and determining an optimum recording condition prior to a disc initialization operation and / or a reformatting operation, the initial state of the disc is improved. The reformatting operation (i.e., the initial recording operation of physical or logical format information) and / or the reformatting operation (i.e., the rewriting operation of logical format information recorded on the disc) is reliably performed. In addition, the OPC operation is performed only in advance of the disc initialization operation and / or the reformatting operation, and when the disc is loaded, the information (data) is recorded on the disc, the recording is resumed, During the recording operation, the OPC operation is not performed at all, so that a wasteful OPC operation for one disk is performed. By reducing the number of executions, reduce the frequency of occurrence of a situation to overflow the OPC area, in which only St. feasible reliably OPC operation when truly necessary.
Thus, it is possible not only to ensure the reliability of the information (data) recorded on the disc, but also to greatly increase the capacity of the buffer memory to be provided in the disc recording / reproducing apparatus for recording / reproducing information on the disc. It is possible to reduce the manufacturing cost of the disk recording / reproducing apparatus associated therewith.
[0017]
[Means for Solving the Problems]
A first aspect of the present invention is a disc recording / reproducing apparatus capable of condensing laser light on a disc-shaped recording medium (hereinafter referred to as a disc) and recording / reproducing information in order to detect optimum recording conditions. OPC pattern generating means for generating OPC (Optimum Power Control: hereinafter referred to as OPC) information having a pattern designated in advance, and the OPC information generated by the OPC pattern generating means at a predetermined position on the disk The OPC pattern recording means for recording in the OPC area provided in advance while changing the recording conditions, and the state of the reproduction signal when the OPC information recorded by the OPC pattern recording means is reproduced are determined in advance. Based on the measurement result of the reproduced signal state measuring means and the reproduced signal state measuring means for measuring using the predetermined measurement method. With the optimum recording condition determining means for determining an optimal recording condition, the physical or logical on a recordable said disk Nahu Record format information first De Only in the case of prior to the disk initialization operation and / or in the case of prior to the reformatting operation to rewrite the logical format information recorded on the recordable disc by the instruction from the user. The disc recording / reproducing apparatus performs an OPC operation for detecting and determining an optimum recording condition when information is recorded on the disc.
[0021]
Thus, said No. 1's According to the present invention, when a recordable disc is loaded and the OPC operation is performed only at the start of the disc initialization operation and / or the reformatting operation, the optimum recording condition for the disc is obtained, and the disc The information (data) recording operation is performed based on the optimum recording condition obtained in the disk initialization operation and / or the reformatting operation without performing the OPC operation every time the data is loaded or each time the information (data) recording operation is performed. By doing so, it is possible not only to reduce wasteful consumption of the OPC area on the disk required for the OPC operation, but to ensure that the OPC operation is performed when it is truly necessary, as well as to record the disc. Memory of buffer memory for temporary storage of playback information (data) provided in the playback device The amount greatly reduced, with, it is possible to achieve a cost reduction of the disc recording and reproducing apparatus effectively.
[0022]
First 2 The invention of the above 1 The disc recording / reproducing apparatus according to the invention is characterized in that the OPC information generated by the OPC pattern generation means is a disc recording / reproducing apparatus in which the pattern is a predetermined fixed pattern or an arbitrary random pattern. It is.
[0023]
First 3 The invention of the above 2 In the disc recording / reproducing apparatus according to the invention, the pattern of the OPC information generated by the OPC pattern generation unit is a predetermined fixed pattern as the predetermined measurement method used by the reproduction signal state measurement unit. Includes measuring the amplitude information of the reproduction signal. When the pattern of the OPC information generated by the OPC pattern generation means is an arbitrary random pattern, the jitter value of the reproduction signal and / or Alternatively, a disk recording / reproducing apparatus that measures the data error rate is used.
[0024]
First 4 The invention of the above 3 In the disc recording / reproducing apparatus according to the invention, the predetermined measurement method used by the reproduction signal state measurement unit measures amplitude information of the reproduction signal as the optimum recording condition determined by the optimum recording condition determination unit. If it is, select a recording condition in which the measurement result of the reproduction signal state measuring means matches or is closest to a predetermined reference value, and the selected recording condition is left as it is or close to the reference value. When the recording condition corrected based on the degree is applied and the predetermined measurement method used by the reproduction signal state measurement means is to measure the jitter value and / or the data error rate of the reproduction signal, Disc recording playback in which the measurement result of the reproduction signal state measuring means is below a predetermined reference value and the recording condition indicating the minimum value is applied. It is characterized in that the apparatus.
[0025]
Thus, said No. 2 Thru 4 According to any of the inventions described above, the OPC operation for obtaining the optimum recording conditions according to the recording characteristics of the disc recording / reproducing apparatus and the disc to be applied can be more reliably performed. The effect of the OPC operation can be further improved.
[0026]
First 5 The disc recording / reproducing apparatus according to any one of the first to sixth inventions, wherein the disc is made of a phase change material that records information depending on whether a recording film is in a crystalline state or an amorphous state. The present invention is characterized in that the recording / reproducing apparatus is a recording medium.
[0027]
Thus, the second 5 According to the invention, the disk initialization operation and / or the reformatting can be performed by using the disk having the recording film as the phase change material for recording / reproducing information (data) based on the high melting point or the crystallization temperature. When performing an information (data) recording operation based on an optimum recording condition obtained by performing an OPC operation only in the operation, recording at an ambient temperature different from the disc initialization operation and / or the reformatting operation Even when the operation is performed, the reliability of the information (data) recorded on the recording film made of the phase change material can be ensured.
[0031]
A sixth aspect of the invention relates to a disc recording / reproducing method capable of condensing laser light on a disc-shaped recording medium (hereinafter referred to as a disc) and recording / reproducing information in order to detect optimum recording conditions. An OPC pattern generation step for generating OPC (Optimum Power Control: hereinafter referred to as OPC) information having a predesignated pattern, and the OPC information generated by the OPC pattern generation step at a predetermined position on the disk The OPC pattern recording step in which recording is performed while changing the recording conditions and the state of a reproduction signal when the OPC information recorded by the OPC pattern recording step is reproduced are determined in advance. A reproduction signal state measurement step for measuring using the predetermined measurement method, and a reproduction signal state measurement step. Tsu and an optimum recording condition determining step of determining an optimum recording condition based on the flop measurement results, the physical or logical on a recordable said disk Na Record format information first Ru Only in the case of prior to the disc initialization operation and / or the case of prior to the reformatting operation for rewriting the logical format information recorded on the recordable disc by the instruction from the user. An OPC operation for detecting and determining an optimum recording condition for recording information on the disc is performed. Features disc recording and playback method .
[0032]
Thus, said No. 6 According to the invention, when a recordable disc is loaded, the OPC operation is performed only at the start of the disc initialization operation and / or the reformatting operation, thereby obtaining the optimum recording condition for the disc. Recording of information (data) based on the optimum recording conditions obtained in the disk initialization operation and / or the reformatting operation without performing the OPC operation every time the disc is loaded or each time the information (data) is recorded. By performing the operation, not only can the wasteful consumption of the OPC area on the disk necessary for the OPC operation be reduced, and the OPC operation can be surely performed when it is really necessary, A buffer memory for temporarily storing playback information (data) provided in the disk recording / playback apparatus. Greatly reduces the re capacity, has, it is possible to achieve a cost reduction of the disc recording and reproducing apparatus effectively.
[0033]
First 7 The present invention relates to a disc recording / reproducing program for controlling an operation of recording and reproducing information by condensing a laser beam on a disc-shaped recording medium (hereinafter referred to as a disc). The disc recording / reproducing method described above is a disc recording / reproducing program provided as a control program that can be executed by a computer.
[0034]
Thus, said No. 7 According to the invention, the disk recording / reproduction having the operational effects of the eighth to tenth aspects can be achieved by rewriting only the control program of the disk recording / reproducing apparatus without changing the hardware of the disk recording / reproducing apparatus. The apparatus can be realized, and can be applied not only to a new disk recording / reproducing apparatus but also to an existing disk recording / reproducing apparatus.
[0037]
DETAILED DESCRIPTION OF THE INVENTION
An example of specific embodiments of a disk recording / reproducing apparatus, a disk recording / reproducing method, a disk recording / reproducing program, and a program recording medium according to the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing an example of the configuration of a disc recording / reproducing apparatus according to the present invention. In the disc recording / reproducing apparatus 100 shown in FIG. 1, the configuration example of the optical disc recording / reproducing apparatus is exemplified by taking the case where the disc 1 is an optical disc that records and reproduces information (data) only by laser light from the pickup 2 as an example. However, the present invention is not limited to such a case, and any method may be used as long as information is recorded and reproduced on a disk-shaped recording medium (that is, a disk) using laser light. For example, a magneto-optical disk recording / reproducing apparatus using a magneto-optical disk for recording / reproducing information by a laser beam from a pickup and a magnetic field from a magnetic head as the disk 1 may be used.
[0038]
That is, the disc 1 can be recorded using laser light, such as a write-once / rewritable optical disc such as CD-R / RW, DVD-R / RW, DVD-RAM, DVD + RW, or a magneto-optical disc such as MO. Any recording medium may be used as long as it is a disc.
[0039]
Next, an outline of the recording / reproducing operation of the disc recording / reproducing apparatus 100 shown in FIG. 1 will be described. When the user loads the disc 1 on the disc recording / reproducing apparatus 100 and loads it, the disc 1 attached to a spindle motor (not shown in FIG. 1) has a constant angular velocity (CAV) or constant linear velocity. It will be in the state which rotates based on (CLV: Constant Linear Velocity). The laser beam emitted from the pickup 2 is focused on the sector position on the designated track on the disk 1 that has reached the state of being rotated at any rotational speed as described above, so that the disk 1 is Information is recorded or information is reproduced from the disk 1. A normal recording / reproducing operation for information on the disc 1 will be briefly described below.
[0040]
First, a normal reproduction operation for reproducing information on the disc 1 will be described.
When a reproduction request is input from the user, the CPU 7 operates the information reproduction unit 8 i of the control program in the memory 8 to operate the analog signal processing circuit 3, the demodulation circuit 4, and the ECC circuit 5 connected to the main bus 11. A command for shifting to the reproduction mode is issued to each of the I / F circuit 6, the recording pulse generation circuit 9, and the modulation circuit 10. Thereafter, the CPU 7 moves the pickup 2 to the target track / sector position on the disk 1 with respect to the pickup drive circuit (not shown) in combination with the operation of the information reproducing unit 8i of the control program. Command seek operation.
[0041]
Here, normally, an address indicating a track / sector position to which the pickup 2 is to be moved is recorded on the disk 1 in advance using physical means (for example, prepits or FM-modulated wobbles). . Accordingly, in order to move the pickup 2 to the target track / sector position, the output of the analog signal processing circuit 3 is input to an address detection circuit (not shown), and the address (track / sector position) on the disk 1 is set. The pickup 2 is moved while detecting and comparing with the target address.
[0042]
The reproduction signal on the disk 1 output from the pickup 2 moved to a predetermined address is input to the analog signal processing circuit 3 where waveform equalization, clock detection by PLL (Phase Locked Loop), etc. are performed and detected. The result is input to the demodulation circuit 4. The demodulation circuit 4 first detects a synchronization signal from the input signal to generate a timing signal for information (data) demodulation, and demodulates the information according to a predetermined modulation rule based on the demodulation timing signal. To do. The demodulated information is input to the ECC circuit 5 to detect and correct data errors caused by noise during reproduction, scratches / dirt on the disk 1, and the like. Information reproduced by correcting the data error by the ECC circuit 5 is output to a subsequent circuit such as an A / D converter or an MPEG decoder via the I / F circuit 6. In many cases, the I / F circuit 6 has a built-in buffer memory, and can absorb an instantaneous transfer rate difference from a subsequent circuit.
[0043]
Next, a normal recording operation for recording information on the disk 1 will be described.
When a recording request is input from the user, the CPU 7 operates the information recording unit 8h of the control program in the memory 8 to operate the analog signal processing circuit 3, the modulation circuit 4, and the ECC circuit 5 connected to the main bus 11. A command for shifting to the recording mode is issued to each circuit unit of the I / F circuit 6, the recording pulse generation circuit 9, and the modulation circuit 10. Thereafter, the pickup 2 is moved to the target address on the disc 1 and performs a still operation at the position indicated by the address until the recording preparation is completed, as in the case of the reproducing operation.
[0044]
The error correction data is added to the recording data (information) input to the I / F circuit 6 by the operation of the CPU 7 that operates according to the recording request from the user and the operation of the information recording unit 8h of the control program. Is then input to the modulation circuit 10. The modulation circuit 10 modulates input data (information) in accordance with a predetermined modulation rule, adds a synchronization signal, and outputs it to the subsequent recording pulse generation circuit 9. The recording pulse generation circuit 9 converts the input modulation data (information) into a recording pulse for recording on the disk 1 on the basis of a recording pulse width, recording laser power, etc. set in advance as optimum recording conditions. And output to the pickup 2. The pickup 2 starts recording information from the target address in accordance with the input recording pulse, and sequentially emits a pulse-modulated laser beam for the specified size specified as the recording request. The recorded information (data) is recorded on the disk 1.
[0045]
Next, an OPC (Optimum Power Control) operation for obtaining an optimum recording laser power (recording condition) will be described.
As described above, the OPC operation is to set a recording condition for a predetermined area (that is, an OPC area) on the disc 1 using OPC information having a pattern designated in advance in order to detect an optimum recording condition. This is an operation for detecting and determining an optimum recording condition (optimum recording laser power) by performing recording after changing and performing a reproducing operation after recording. The pattern constituting such OPC information is a disc. Depending on the recording characteristics of the recording / reproducing apparatus 100 and the disc 1 to be applied, either a unique fixed pattern predetermined for OPC operation or an arbitrary random pattern generated at random is used.
[0046]
Here, when a fixed pattern is used as the OPC information, the optimum recording condition is determined based on the amplitude information of the reproduction signal obtained by reproducing the fixed pattern recorded in the OPC area on the disc 1. When a random pattern is used as the OPC information, an optimum recording condition is determined based on a jitter value and / or a data error rate of a reproduction signal obtained by reproducing the random pattern recorded in the OPC area on the disc 1. Become. When determining the optimum recording condition, for example, the recording condition in which the amplitude information (for example, the asymmetry degree and the modulation degree) of the reproduction signal matches or approaches a predetermined reference value, or the jitter value and / or the reproduction signal This is determined by appropriately selecting from the recording conditions when the data error rate is equal to or lower than a predetermined reference value.
In the following description, the case of using the former fixed pattern will be described, but a substantially similar technique can be applied to the case of using the latter random pattern.
[0047]
First, a condition set in advance as a condition for performing the OPC operation has occurred in the disk recording / reproducing apparatus 100 (that is, as described later, an instruction to start a disk initialization operation or a reformat operation is issued. When the CPU 7 detects that the CPU 7 is based on the operation of the OPC operation control unit 8a of the control program in the memory 8, the CPU 7 is connected to the main bus 11 in combination with the operation of the OPC operation control unit 8a. A command is issued to each of the analog signal processing circuit 3, modulation circuit 4, ECC circuit 5, I / F circuit 6, recording pulse generation circuit 9, and modulation circuit 10 so as to be in the OPC recording mode. . Thereafter, in combination with the operation of the OPC operation control unit 8a of the control program, the CPU 7 moves the pickup 2 to the target sector position in the OPC area on the disk 1 with respect to the pickup drive circuit (not shown). Command seek operation to move to. Further, in combination with the operation of the OPC operation control unit 8a of the control program, the CPU 7 activates the OPC pattern generation unit 8b of the control program in the memory 8 and fixes it as OPC information to be recorded in the OPC area. Pattern data is created and set in the OPC information area 8j of the memory 8.
[0048]
Further, the CPU 7 starts the OPC pattern recording unit 8c of the control program in the memory 8 in combination with the operation of the OPC operation control unit 8a of the control program. After the pickup 2 moves to the target sector position in the OPC area on the disk 1, the CPU 7 combines with the operation of the OPC pattern recording unit 8c, a plurality of pre-registered in the recording condition area 8k of the memory 8. Is output to the recording pulse generation circuit 9 and the OPC information set in the OPC information area 8j of the memory 8 is output to the modulation circuit 10. The modulation circuit 10 modulates the input OPC information including the fixed pattern according to a predetermined modulation rule, adds a synchronization signal, and outputs the synchronization signal to the recording pulse generation circuit 9.
[0049]
The recording pulse generation circuit 9 converts the input modulated OPC information with a synchronization signal into a recording pulse according to the recording conditions designated by the CPU 7 based on the operation of the OPC pattern recording unit 8c. It should be noted that the CPU 7 specifies that the recording conditions specified by the CPU 7 are sequentially changed and set every time the OPC information having a fixed pattern is recorded in the OPC area on the disc 1 by a predetermined size. This is configured in combination with the operation of the recording unit 8c.
The pick-up 2 emits a pulse-modulated laser beam based on the input recording pulse, so that the OPC area on the disc 1 is sequentially shifted from the fixed pattern based on the recording conditions different for each predetermined size. OPC information is recorded.
[0050]
Next, when the CPU 7 detects the end of the operation of recording the OPC information in the OPC area on the disk 1 by the operation of the OPC pattern recording unit 8 c based on the operation of the OPC operation control unit 8 a of the control program in the memory 8. The CPU 7 is coupled with the operation of the OPC operation control unit 8a, and the analog signal processing circuit 3, the modulation circuit 4, the ECC circuit 5, the I / F circuit 6, and the recording pulse generation circuit 9 connected to the main bus 11. A command is issued to each circuit unit of the modulation circuit 10 so as to be in the OPC playback mode. Thereafter, in combination with the operation of the OPC operation control unit 8a, the CPU 7 moves the pickup 2 to the target sector position in the OPC area on the disk 1 with respect to the pickup drive circuit (not shown). Command seek operation.
[0051]
Further, the CPU 7 starts the reproduction signal state measurement unit 8d of the control program in the memory 8 in combination with the operation of the OPC operation control unit 8a of the control program. After the pickup 2 has moved to the target sector position in the OPC area on the disk 1, the pickup 2 performs a sequential reproduction operation from the recording information of the target sector in the OPC area, and the reproduction signal is sent to the analog signal processing circuit 3. Entered. The analog signal processing circuit 3 performs A / D conversion on the reproduction signal output from the pickup 2 based on the later-described timing instructed by the CPU 7 in combination with the operation of the reproduction signal state measurement unit 8d. The digitized reproduction signal is output to the CPU 7. Further, the analog signal processing circuit 3 performs waveform equalization and clock detection by PLL as in the case of normal reproduction operation for reproducing normal information (data) on the disk 1, and then the detection result is demodulated by the demodulation circuit 4 Output to.
[0052]
The demodulation circuit 4 detects a synchronization signal from the input signal and outputs the detection result of the synchronization signal to the CPU 7. In combination with the operation of the reproduction signal state measuring unit 8d, the CPU 7 generates a timing pulse for A / D conversion performed in the analog signal processing circuit 3 based on the synchronization signal detection result from the demodulation circuit 4, Output to the signal processing circuit 3. Thereafter, the CPU 7 combines with the operation of the reproduction signal state measuring unit 8d based on the A / D conversion result output from the analog signal processing circuit 3 and the synchronization signal detection result output from the demodulation circuit 4. Thus, the amplitude information of the OPC information composed of the fixed pattern recorded in the target sector of the OPC area on the disk 1, for example, the asymmetry degree and the modulation degree is measured in correspondence with the recording position of the OPC area.
[0053]
Here, as described above, in combination with the operation of the OPC pattern recording unit 8c, the CPU 7 records the OPC information including the fixed pattern in the OPC area on the disk 1 for every predetermined size. Since the conditions are sequentially changed and recorded in the order registered in advance, if the recording position of the OPC area is known, the recording condition for the reproduced signal (the reproduced signal of the OPC information consisting of a fixed pattern) can be easily determined. be able to. Therefore, it is possible to measure amplitude information (for example, asymmetry degree and modulation degree) corresponding to each recording position in the OPC area. As a result, amplitude information corresponding to each recording condition can be measured. It turns out that.
[0054]
When the measurement of the amplitude information regarding all the recording positions to be measured by the operation of the reproduction signal state measurement unit 8d is completed, the CPU 7 operates the OPC operation control unit 8a and the reproduction signal state measurement unit 8d of the control program of the memory 8. When detected based on the above, the CPU 7 activates the optimum recording condition determination unit 8e of the control program in the memory 8 in combination with the operation of the OPC operation control unit 8a, and the operation of the reproduction signal state measurement unit 8d From the measured amplitude information of each reproduction signal, a recording condition when a value that matches a predetermined reference value or indicates the closest value is selected, and the selected recording condition (that is, If the amplitude information of the reproduced signal matches, the recording condition itself when the matched reproduced signal is recorded) or a corrected recording condition that corrects the recording condition (the amplitude information is the highest). In the case where a close value is indicated, one of the recording conditions corrected based on the degree of proximity) is determined as the optimum recording condition, notified to the recording pulse generation circuit 9, and the physical condition of the disk 1 Is stored in the optimum recording condition area 8 l of the memory 8. Thus, the subsequent recording operation for the disc 1 is performed based on the optimum recording condition recorded in the physical format information of the disc 1 or stored in the optimum recording condition area 8 l of the memory 8. As a result, the reliability of the recorded information can be ensured.
[0055]
When the CPU 7 detects that the above series of OPC operations (operations for searching for and determining the optimum recording conditions) is completed based on the operation of the OPC operation control unit 8a of the control program in the memory 8, the CPU 7 In combination with the operation of the OPC operation control unit 8a, the analog signal processing circuit 3, the modulation circuit 4, the ECC circuit 5, the I / F circuit 6, the recording pulse generation circuit 9, and the modulation circuit 10 connected to the main bus 11 are connected. A command is issued to each of the circuit units so as to enter the standby mode in which the OPC reproduction mode is canceled and a new instruction is waited.
[0056]
Next, regarding the disk loading operation, a disk loading sequence in the prior art and an example of the disk loading sequence in the present invention will be described.
First, the disk loading sequence in the prior art will be described with reference to FIG. FIG. 2 is a flowchart for explaining the disc loading sequence in the conventional disc recording / reproducing apparatus. As described above, the conventional disk recording / reproducing apparatus is set to perform the OPC operation every time the disk is loaded, and the flowchart of FIG. 2 shows the disk recording / reproducing which employs the OPC operation method. It shows the loading sequence of the device.
[0057]
When the disc is loaded in the disc recording / reproducing apparatus (step S1), the disc is attached to the spindle motor and starts rotating (step S2), the laser beam from the pickup is condensed on the disc (step S3). ) The disc type is determined based on the reflected light from the disc (step S4). As a result of determining the disc type, if it is determined that the disc is a recordable disc (YES in step S5), an OPC operation for obtaining the optimum recording condition is started (step S6). As described above, in the conventional disc recording / reproducing apparatus, the OPC operation is always performed when a recordable disc is loaded, regardless of whether the user next instructs to record information on the disc. Is set. When acquisition (detection / determination) of the optimum recording condition is successful by the OPC operation (YES in step S7), a physical or logical format information reading operation necessary for the information recording / reproducing operation is executed. (Step S8), the loading operation of the disc is completed.
[0058]
Here, as the OPC area on the disk used for the OPC operation, as described above, only a finite size (number of sectors) is provided. Therefore, if the OPC area is used wastefully, an information recording operation is performed. As in the case, when the OPC operation result is truly confirmed, there is a possibility that the usable OPC area is consumed and the OPC operation cannot be performed.
[0059]
Next, the disc loading sequence in the present invention will be described. FIG. 3 is a flowchart for explaining an example of a disc loading sequence in the disc recording / reproducing apparatus according to the present invention. As in the case of the conventional disk recording / reproducing apparatus, when the disk 1 is loaded in the disk recording / reproducing apparatus 100 (step S11), the CPU 7 is notified and the disk loading unit 8f of the control program in the memory 8 is activated. Is done. In combination with the operation of the disk loading unit 8f, the CPU 7 attaches the disk 1 to the spindle motor, starts rotation by the spindle motor (step S12), and condenses the laser light from the pickup 2 on the disk 1. (Step S13). Further, the CPU 7 determines the type of the disk 1 based on the reflected light from the disk 1 in combination with the operation of the disk loading unit 8f (step S14).
[0060]
Here, in the present invention, even if the type of the disc 1 is a recordable disc, the OPC operation is not performed at the time of disc loading, unlike the case of the prior art as shown in FIG. Then, only the physical or logical format information acquisition operation necessary for the subsequent recording / reproducing operation is performed, and the process is terminated (step S15).
That is, the OPC operation in the present invention is a case where a recordable disc is loaded, and when a disc initialization operation described later is activated (for example, a new recordable disc is loaded, And / or when it is detected that no logical format information has been recorded yet, or when an instruction is given to record physical or logical format information from the user) and / or When the user instructs a reformatting operation to rewrite the recorded format information (for example, rewriting that restores the logical format information recorded on the disc 1 to the initial state according to the user's instruction Only when the instruction is issued).
[0061]
Next, a disk initialization operation in the prior art and an example of a disk initialization operation in the present invention will be described.
First, the disk initialization operation in the prior art will be described with reference to FIG. FIG. 4 is a flowchart for explaining the disc initialization operation in the conventional disc recording / reproducing apparatus. Note that, not only in the prior art, but also in the case of the present invention, the disc recording / reproducing apparatus determines that a new disc or a disc on which no physical format information is recorded has been loaded, or if the disc is initially recorded by the user. When an instruction for making a disc is issued, a disk initialization operation is started. The disc initialization operation referred to here means physical format information on the disc (for example, PMA (Program Memory Area) in CD-R / RW, RMA (Recording Management Area) in DVD-R / RW). , And Physical format Information Zone) and / or logical format information (Volume Descriptor, File System, etc.).
[0062]
When the disk initialization operation is started, the conventional disk recording / playback apparatus immediately builds physical format information indicating the disk format and records it in a predetermined sector on the disk (step S21). The recording conditions at this time are set based on conditions read from pits and wobbles recorded in advance or conditions registered and stored in advance in the disk recording / reproducing apparatus when the disc is manufactured. Here, if the physical format information recorded on the disc cannot be read, the disc cannot be recorded / reproduced. Therefore, immediately after recording the physical format information, the recorded physical format information is read. To check whether there is any error in the read physical format information, and if error correction is possible even if there is an error, check the read physical format information against the original information. .
[0063]
If the collation results match (YES in step S22), the process proceeds to the next step S24. If the read data (that is, the physical format information recorded on the disc) does not match the original information, or if the physical format information cannot be corrected (NO in step S22), the predetermined data The number of repetitions of recording, that is, whether or not the number of recording retries is exceeded, and if it is within the number of recording retries (NO in step S23), recording of physical format information is repeated again. If the recording time retry count limit is exceeded (YES in step S23), the disk initialization operation is unsuccessfully terminated.
[0064]
On the other hand, if the physical format information has been normally recorded (YES in step S22), the disc recording / reproducing apparatus constructs the logical format information of the disc and records it in a predetermined sector of the disc (step). S24). As for the logical format information, if the logical format information cannot be read, it becomes a disc that cannot be recorded / reproduced. As in the case of the physical format information, the logical format information is read immediately after recording. And the recorded logical format information is collated with the original information (step S25). If the collation result is abnormal (NO in step S25), the predetermined number of repetitions, that is, the Retry limit number has not been reached. If so (NO in step S26), re-recording on the logical format information is performed, and if the predetermined number of repetitions, that is, the retry limit number is exceeded (YES in step S26), the disk initialization operation has failed as a failure. finish. On the other hand, when the logical format information can be normally recorded (YES in step S25), the disk initialization operation is normally completed.
[0065]
Next, the disk initialization operation in the present invention will be described. FIG. 5 is a flowchart for explaining an example of the disc initialization operation in the disc recording / reproducing apparatus according to the present invention.
In the present invention, when the CPU 7 is notified that the start condition of the disk initialization operation is satisfied (for example, it is detected that a disk on which no physical format information is recorded is loaded) In such a case, or when the user instructs, the CPU 7 activates the disk initialization unit 8g of the control program in the memory 8 to activate the initialization operation shown in FIG.
[0066]
In the present invention, as described above, first, in order to obtain the optimum recording condition that can surely execute the initialization operation of the disc 1, the OPC operation control unit 8a of the control program of the memory 8 is operated to perform the OPC operation. The optimum recording condition is obtained (step S31). When the OPC operation is completed and the optimum recording condition is obtained (YES in step S32), the recording pulse is based on the obtained optimum recording condition set in the optimum recording condition area 8l of the memory 8. The output level of the recording laser power and the recording pulse width of the generation circuit 9 are set, and the physical or logical format information of the disc 1 is determined in the same manner as in the conventional disc recording / reproducing apparatus shown in FIG. Recording is performed on the sector (steps S33 to S38).
[0067]
Thus, in the present invention, after the recordable disc 1 is loaded, as shown in FIG. 5, the OPC operation is performed for the first time when the disc initialization operation which is the first writing operation to the disc 1 is started. As shown in FIG. 2 in the conventional disc recording / reproducing apparatus, the OPC area on the disc is unnecessarily consumed as compared with the case where the OPC operation is automatically performed each time the disc is loaded. Without any problem, the optimum recording condition can be obtained effectively when it is truly necessary.
[0068]
Further, as described in the flowchart of FIG. 4 described above, in the conventional disk recording / reproducing apparatus, recording conditions written in the disk in advance by the disk manufacturer or registered in the disk recording / reproducing apparatus in advance. Since physical or logical format information is recorded based on the recording conditions, the disk manufacturer performs the disk initialization operation for the pickup and the disk used to write the recording conditions to the disk. If the characteristics of the pickup of the disk recording / playback apparatus to be implemented are different from each other, or if the disk initialization operation is performed by loading a disk of a type not registered in the disk recording / playback apparatus, Logical format information cannot be recorded accurately If it is also generated.
[0069]
However, in the disc recording / reproducing apparatus 100 according to the present invention, the OPC operation is always performed prior to the initialization operation of the disc 1 as shown in the flowchart of FIG. The recording operation of the format information is performed based on optimum recording conditions, and the reliability of the recorded physical or logical format information can be greatly improved.
[0070]
In FIG. 5, in the case of the disc initialization operation for recording the format information for the first time on the disc 1, the OPC operation for acquiring the optimum recording condition is performed prior to the format information recording operation. In the disc recording / reproducing apparatus 100 according to the present invention, the reformatting operation for rewriting the logical format information recorded on the disc 1 according to the user's instruction as described above is not limited to this case. In this case, the OPC operation is performed prior to the reformatting operation. Thus, in both the disc initialization operation and the reformatting operation, the format information can be reliably recorded and rerecorded based on the acquired optimum recording condition.
[0071]
In the present invention, when the recordable disc 1 is loaded, the OPC operation is only performed prior to the disc initialization operation and / or the reformatting operation. It is also possible to prevent the OPC operation from being performed each time or whenever information (data) is recorded on the disk 1 or when recording is resumed, or when an error occurs during the recording operation or whenever the ambient temperature changes. It is possible.
[0072]
Next, a sequence at the start of recording in the prior art and an example of a sequence at the start of recording in the present invention will be described.
First, a sequence at the start of recording in the prior art will be described with reference to FIG. FIG. 6 is a flowchart for explaining a disc recording start sequence in the conventional disc recording / reproducing apparatus.
In the conventional disc recording / reproducing apparatus, when the user gives an instruction to start recording, first, an OPC operation is performed (step S41). When the OPC operation is normally performed and the optimum recording condition is acquired (YES in step S42), the optimum recording condition obtained as a result of the OPC operation is set as the recording condition and required for the recording operation. After various recording preparations are made (step S43), information recording operation on the disc is started based on the recording conditions set by the recording preparations (step S43).
[0073]
Here, as described above, the OPC operation includes an access operation to the OPC area and a recording operation and a reproduction operation of OPC information including a fixed pattern. Therefore, the worst OPC execution time is about several seconds. There are cases where this is necessary. In addition, since the OPC operation is executed after a recording instruction is given from the user, for example, the buffer memory built in the disk recording / reproducing apparatus (that is, in the case of the disk recording / reproducing apparatus 100 according to the present invention). The memory (corresponding to the buffer memory incorporated in the I / F circuit 6) is the time required for executing the OPC operation, that is, the information (data) for several seconds, in other words, until the OPC operation is completed. A memory capacity is required to store recording information (data) input to the disk recording / reproducing apparatus during the period.
[0074]
Next, the sequence at the start of recording in the present invention will be described. FIG. 7 is a flowchart for explaining an example of a disc recording start sequence in the disc recording / reproducing apparatus according to the present invention.
In the disc recording / reproducing apparatus 100 according to the present invention, as described in the flowchart of FIG. 5, the OPC operation is performed only prior to the initialization operation or the reformatting operation of the disc 1, and information (data) is recorded on the disc 1. At the start, the OPC operation is not performed. Therefore, when the user gives an instruction to start recording, the CPU 7 activates the information recording unit 8h of the control program in the memory 8 and immediately makes various recording preparations necessary for the recording operation (step S51). Thereafter, an information (data) recording operation is started (step S52).
[0075]
Thus, it takes a relatively short time to start the recording operation of information (data) onto the disk 1 from the user's recording start instruction. As a result, as shown in FIG. Compared to a conventional disk recording / reproducing apparatus that performs an OPC operation prior to the recording operation, the memory capacity of the buffer memory built in the I / F circuit 6 of the disk recording / reproducing apparatus 100 shown in FIG. 1 is greatly reduced. Therefore, the cost of the disc recording / reproducing apparatus 100 can be reduced.
[0076]
Further, the optimum recording condition as a result of the OPC operation is recorded not only in the optimum recording condition area 8l of the memory 8 but also in the physical format information of the disc after the OPC operation is completed. Thus, when the initialized disc (that is, the disc for which the initialization operation shown in FIG. 5 has been completed) is loaded onto the disc recording / reproducing apparatus 100 and recording is to be started, FIG. As described in FIG. 3, the optimum recording condition as the result of the previous OPC operation is acquired from the physical format information read when the disk 1 is loaded, and the information is recorded based on the obtained optimum recording condition. If the recording operation is performed, information (data) can be reliably recorded on the disk 1 based on the optimum recording laser power and the optimum recording pulse width.
[0077]
On the other hand, as a recording film of a rewritable optical disc such as DVD-RW or CD-RW, an alloy film made of a phase change material is adopted, and the recording film is brought to a melting point or a crystallization temperature by condensing laser light. By raising, the state of the alloy film made of the phase change material is changed between a crystalline state and an amorphous state, and information (data) is recorded and erased. In the recording / erasing operation of information (data) using such an alloy film of phase change material, the temperature of the recording film reaches as high as several hundred to several hundreds of degrees Celsius. Compared to a conventional magneto-optical disk that records and erases information (data) by utilizing a change in the magnetization direction of the film, the influence of a change in ambient temperature is reduced. Therefore, as in the prior art, when the recording operation is started, the OPC operation is performed again, so that the initialization operation of the disk can be performed without performing the operation for obtaining the optimum recording condition accompanying the change in the ambient temperature every time. Even if the recording operation is performed based on the optimum recording condition acquired at the time of the reformatting operation, the reliability of the recorded information (data) can be maintained.
[0078]
Furthermore, information recording margins for slight variations in recording laser power and recording pulse width have been greatly improved due to recent improvements in the phase change material constituting the recording film and the film formation technology of the recording film. Not only changes in optimum recording conditions due to changes in ambient temperature, but also effects on the reliability of information (data) recorded on the disc, even if there are slight variations in the optimum recording conditions depending on the radial position of the disc Is getting very few.
[0079]
Therefore, by using a disk in which the phase change material is a recording film material, an optimal recording condition is obtained by performing the OPC operation only in the disk initialization operation or the reformatting operation. Even if the information (data) recording operation is not performed every time the information (data) recording operation is performed, the information (data) recording operation may be performed based on the optimum recording condition acquired in the disc initialization operation or the reformatting operation. The reliability of the information (data) recorded on the recording film made of the changing material can be ensured.
[0080]
As described above, in the disc recording / reproducing apparatus 100 according to the present invention, disc initialization operation (format information recording operation in response to loading of a new disc that has not been disc initialization or a user instruction) and / or Alternatively, prior to the start of the reformatting operation (the rewriting operation of the recorded logical format information), the OPC operation for obtaining the optimum recording conditions is performed, thereby formatting in the disc initialization operation and / or the reformatting operation. It is possible to reliably perform the information recording operation, and it is possible to greatly reduce the frequency of the disk unusable that may occur due to the failure of the disk initialization operation or the reformatting operation.
[0081]
Further, when a recordable disc 1 is loaded, an optimal recording condition for the disc 1 is obtained by performing an OPC operation only at the start of the disc initialization operation and / or the reformatting operation. Information (data) is recorded on the basis of the optimum recording conditions acquired in the disk initialization operation and / or the reformatting operation without performing the OPC operation every time the disk 1 is loaded or each time information (data) is recorded. By performing the operation, wasteful consumption of the OPC area on the disk 1 required for the OPC operation is reduced, and not only the OPC operation can be surely performed when it is really necessary. , A buffer memo for temporarily storing reproduction information (data) provided in the disk recording / reproducing apparatus 100 Of the memory capacity is greatly reduced, with, it is possible to achieve a cost reduction of the disc recording and reproducing apparatus 100 effectively.
[0082]
Further, in the disk recording / reproducing apparatus 100 according to the present invention, the disk recording / reproducing apparatus does not change the hardware of the conventional disk recording / reproducing apparatus at all, as shown in the flowcharts of FIGS. It can be realized only by changing 100 control programs, and is effective not only for a new disk recording / reproducing apparatus but also for an existing disk recording / reproducing apparatus by simply rewriting the control program. Can be applied.
[0083]
In the above-described embodiment, the OPC operation has been described as a method for recording the OPC information including a fixed pattern and determining the optimum recording condition from the amplitude information of the reproduction signal of the OPC information including the fixed pattern. In the invention, an OPC operation using another method may be used. For example, as described above, the OPC information including a random pattern is recorded, and the jitter value and / or the data error rate of the reproduced signal of the OPC information including the random pattern is equal to or smaller than a predetermined reference value. A method may be used in which the recording condition indicating the value of is used as the optimum recording condition.
[0084]
【The invention's effect】
As described above, according to the disk recording / reproducing apparatus, the disk recording / reproducing method, the disk recording / reproducing program, and the program recording medium according to the present invention, the following operational effects can be obtained.
That is, in the disc recording / reproducing apparatus, the disc recording / reproducing method, the disc recording / reproducing program, and the program recording medium according to the present invention, the disc initialization operation (when a new disc not yet initialized is loaded or the disc initialization from the user is performed). Before the start of the format information recording operation according to the instruction (or the like) or reformatting operation (format information rerecording operation due to the occurrence of a request to rewrite the recorded logical format information, etc.). By performing the OPC operation, it is possible to reliably perform the recording operation of the format information in the disc initialization operation or the reformatting operation, and there is a possibility of using the disc that may be caused by the failure of the disc initialization operation or the reformatting operation. Impossible It is possible to significantly reduce the raw frequency.
[0085]
Further, when a recordable disc is loaded and the OPC operation is performed only at the start of the disc initialization operation and / or the reformatting operation, the optimum recording condition for the disc is obtained. The information (data) recording operation is performed based on the optimum recording condition acquired in the disk initialization operation and / or the reformatting operation without performing the OPC operation at every loading or information (data) recording operation. As a result, the unnecessary consumption of the OPC area on the disk required for the OPC operation can be reduced, and not only the OPC operation can be surely performed when it is really necessary, but also the disk recording / reproduction. Memory capacity of buffer memory for temporary storage of playback information (data) provided in the device Greatly reduced, with, it is possible to achieve a cost reduction of the disc recording and reproducing apparatus effectively.
[0086]
Further, in the disk recording / reproducing apparatus according to the present invention, the above-described effects can be obtained by changing the control program of the disk recording / reproducing apparatus without changing the hardware of the conventional disk recording / reproducing apparatus. The present invention can be effectively applied not only to a new disk recording / reproducing apparatus but also to an existing disk recording / reproducing apparatus.
[0087]
Further, by using a disk having a recording film made of an alloy film made of a phase change material that performs information (data) recording / reproducing operation based on a high melting point or crystallization temperature, the disc initialization operation and / or re-operation is performed. When performing a recording operation at an ambient temperature different from that at the time of the disc initialization operation when performing the information (data) recording operation based on the optimum recording condition obtained by performing the OPC operation only in the formatting operation. Even if it exists, the reliability of the information (data) recorded on the recording film made of the phase change material can be ensured.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an example of the structure of a disk recording / reproducing apparatus according to the present invention.
FIG. 2 is a flowchart for explaining a disk loading sequence in a conventional disk recording / reproducing apparatus.
FIG. 3 is a flowchart for explaining an example of a disc loading sequence in the disc recording / reproducing apparatus according to the present invention.
FIG. 4 is a flowchart for explaining a disc initialization operation in a conventional disc recording / reproducing apparatus.
FIG. 5 is a flowchart for explaining an example of the disc initialization operation in the disc recording / reproducing apparatus according to the present invention;
FIG. 6 is a flowchart for explaining a disc recording start sequence in a conventional disc recording / reproducing apparatus.
FIG. 7 is a flowchart for explaining an example of a disc recording start sequence in the disc recording / reproducing apparatus according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Disk, 2 ... Pickup, 3 ... Analog signal processing circuit, 4 ... Demodulation circuit, 5 ... ECC circuit, 6 ... I / F circuit, 7 ... CPU, 8 ... Memory, 8a ... OPC operation control part, 8b ... OPC Pattern generation unit, 8c ... OPC pattern recording unit, 8d ... reproduction signal state measurement unit, 8e ... optimum recording condition determination unit, 8f ... disc loading unit, 8g ... disc initialization unit, 8h ... information recording unit, 8i ... information reproduction 8j: OPC information area, 8k: Recording condition area, 8l: Optimal recording condition area, 9: Recording pulse generation circuit, 10: Modulation circuit, 11: Main bus, 100: Disc recording / reproducing apparatus.

Claims (7)

  A pattern designated in advance for detecting optimum recording conditions in a disk recording / reproducing apparatus capable of condensing laser light on a disk-shaped recording medium (hereinafter referred to as a disk) and recording / reproducing information. OPC pattern generation means for generating OPC (Optimum Power Control: hereinafter referred to as OPC) information, and the OPC information generated by the OPC pattern generation means is provided in a predetermined position on the disk. OPC pattern recording means for recording in the OPC area while changing the recording conditions, and a predetermined measurement method for determining the state of the reproduction signal when the OPC information recorded by the OPC pattern recording means is reproduced. Reproducing signal state measuring means for measuring using the Prior to a disc initialization operation for first recording physical or logical format information on the recordable disc, and / or according to an instruction from the user. Detects and determines the optimum recording conditions for recording information on the disc only in any case prior to the reformatting operation to rewrite the logical format information recorded on the recordable disc. A disc recording / reproducing apparatus characterized in that an OPC operation is performed.   2. The disk recording / reproducing apparatus according to claim 1, wherein the pattern of the OPC information generated by the OPC pattern generating means is a predetermined fixed pattern or an arbitrary random pattern. .   3. The disc recording / reproducing apparatus according to claim 2, wherein the pattern of the OPC information generated by the OPC pattern generation unit is a predetermined fixed pattern as the predetermined measurement method used by the reproduction signal state measurement unit. In this case, amplitude information of the reproduction signal is measured, and when the pattern of the OPC information generated by the OPC pattern generation means is an arbitrary random pattern, a jitter value of the reproduction signal and A disc recording / reproducing apparatus for measuring a data error rate.   4. The disc recording / reproducing apparatus according to claim 3, wherein the predetermined measurement method used by the reproduction signal state measurement unit measures the amplitude information of the reproduction signal as the optimum recording condition determined by the optimum recording condition determination unit. If it is to be performed, select the recording condition in which the measurement result of the reproduction signal state measuring means matches or is closest to a predetermined reference value, and the selected recording condition is left as it is or the same as the reference value. When the recording condition corrected based on the proximity degree is applied, and the predetermined measurement method used by the reproduction signal state measurement unit is to measure the jitter value and / or data error rate of the reproduction signal, The measurement result of the reproduction signal state measurement means is equal to or less than a predetermined reference value, and a recording condition indicating a minimum value is applied. That disk recording and reproducing apparatus.   5. The disc recording / reproducing apparatus according to claim 1, wherein the disc is a recording medium made of a phase change material for recording information depending on whether a recording film is in a crystalline state or an amorphous state. A disc recording / reproducing apparatus. A pattern pre-designated for detecting optimum recording conditions in a disk recording / reproducing method capable of condensing laser light on a disk-shaped recording medium (hereinafter referred to as a disk) and recording / reproducing information. OPC pattern generation step for generating OPC (Optimum Power Control: hereinafter referred to as OPC) information, and the OPC information generated by the OPC pattern generation step is provided in a predetermined position on the disc. An OPC pattern recording step for recording in the OPC area while changing the recording conditions, and a state of a reproduction signal when the OPC information recorded by the OPC pattern recording step is reproduced is determined by a predetermined measurement method. And a measurement result of the reproduction signal state measurement step. Optimum and a optimum recording condition determining step of determining a recording condition, if prior to physical or logical recording to Lud disk initialization operation of the formatting information first on a recordable said disk on the basis of And / or in the case of prior to a reformatting operation to rewrite logical format information recorded on the recordable disc in accordance with an instruction from the user, information is only transferred onto the disc. A disc recording / reproducing method characterized in that an OPC operation for detecting and determining an optimum recording condition for recording is performed.   7. The disc recording / reproducing method according to claim 6, wherein the disc recording / reproducing program controls the operation of recording / reproducing information by condensing a laser beam on a disc-shaped recording medium (hereinafter referred to as a disc). A disc recording / reproducing program, comprising: a control program that can be executed by the program.

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