JP2010282695A - Semiconductor integrated circuit which can be mounted on optical disk apparatus and operating method thereof, and optical disk apparatus and operating method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently select an optimal recording strategy. <P>SOLUTION: A semiconductor integrated circuit 4 which can be mounted on an optical disk apparatus includes: a motor control circuit 47, a laser control circuit 46, a pickup position control circuit 45, signal detection circuits 41 and 42, a control unit 43, and a memory 44. The control unit 43 calculates a plurality of initial strategies from one standard initial strategy, and records evaluation data onto an optical disk 1 while varying recording laser power according to the plurality of initial strategies. The control unit 43 executes signal quality evaluation for a plurality of pieces of evaluation data by data reproduction of the signal detection circuits 41 and 42. Based on the result of the evaluation, one of the plurality of initial strategies is selected as an adjustment start strategy, and based on the selected strategy, the optimal recording strategy which is used for actual recording is determined. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a semiconductor integrated circuit that can be mounted on an optical disk device and an operation method thereof, an optical disk device and an operation method thereof, and particularly to a technique effective for efficiently selecting an optimal recording strategy.

  In an optically writable or rewritable optical disk such as a DVD-R (DVD-Recordable) and a DVD-RW (DVD-Recordable) that are currently available on the market, light is irradiated by irradiating a laser beam on the recording surface of the disk. A heat change occurs in the storage medium and information is recorded. The laser beam is modulated by a recording pulse having a time width corresponding to the information to be recorded, and a recording mark having a length corresponding to the information to be recorded is formed on the optical disc.

  On the other hand, as described in the following Patent Document 1, instead of forming one recording mark with one laser pulse, a laser power control method for forming a recording mark with a pulse train including a plurality of short pulses (multipulses). Is used. This method is called a write strategy (recording strategy), and heat accumulation on the recording surface of the optical disc is reduced compared to the method of irradiating a single recording pulse. The temperature distribution of the recording mark can be made uniform, the recording mark can be prevented from becoming a tear film shape, and a recording mark having a preferable shape can be formed.

  However, for multi-pulse recording strategies, there is no problem at normal speed, but during high-speed recording, the amplitude of the pulse changes due to overshoot and undershoot, and the heat quantity of the optical disc cannot be accurately controlled, and a record mark with an appropriate shape is recorded. There is a problem that you can't. In order to solve this problem, Patent Document 1 listed below discloses an intermediate bias portion whose time width changes according to the top pulse for preheating the recording surface of the optical disc and the length of the mark to be recorded, and the rear end portion of the recording mark Another type of recording strategy is described that uses recording pulses, including last pulses that adjust the shape of the recording. Further, in this other recording strategy, the position of the top pulse and the last pulse and the last pulse are considered in consideration of thermal interference during recording and optical interference during reproduction due to a change in the space length before and after the mark to be recorded. The pulse width is changed according to the space length immediately before and after the mark to be recorded. Another type of recording strategy using a uniquely shaped recording pulse including a top pulse, an intermediate bias portion, and a last pulse is called a castle type recording strategy.

  As described above, the optical disc apparatus is configured to be able to generate a recording pulse having an optimum recording power with at least one predetermined recording strategy. However, the optimum recording pulse timing position of the recording pulse varies due to variations in performance of the optical disk device itself, variations in various optical disks mounted on the optical disk device, and the like.

  If the recording strategy such as the recording pulse timing position of the optical disk device is not appropriate for the optical disk mounted in this way, the mark length and edge position of the recording mark recorded on the optical disk will not be appropriate, and jitter characteristics and errors will be lost. Reproduction quality such as rate deteriorates. For this reason, techniques for optimizing the recording strategy have been studied conventionally. For example, Patent Document 2 and Patent Document 3 described below describe techniques for optimizing a recording strategy for recording information on an optical disc.

  First, in the following Patent Document 2, a plurality of different recording strategies per one disk manufacturer ID are stored in the storage means, and one of the recording strategies corresponding to the disk manufacturer ID of the mounted optical disk is Read out from multiple stored recording strategies, perform a recording test with the read recording strategy, determine the suitability of the recording power from the result of this test, and set the recording strategy for recording based on the determination result It is described to do. As a result of the determination of the recording power, when the recording power is appropriate, the recording strategy is set for recording. When the recording power is not appropriate, other recording strategies of the plurality of recording strategies are stored from the storage means. A read test is performed to determine whether or not the recording power is appropriate, and a recording strategy for obtaining an appropriate recording power is set.

Further, in Patent Document 3 below, the system controller performs test data trial writing with various recording strategies using the test area of the optical disc, and evaluates the reproduction signal quality of the test data to determine the optimum recording strategy. The selection is described. The system controller determines the difference between the minimum error rate Eb for each recording strategy, the recording power range We for obtaining the threshold error rate, the recording power Pmb for obtaining the target β value, and the recording power Peb for obtaining the minimum error rate. Accordingly, the evaluation value Hst is calculated by Hst = A · Eb ² + B · We ² + C · (Peb−Pmb) ² , and the recording strategy for obtaining the minimum Hst is set as the optimum recording strategy.

Japanese Patent Laid-Open No. 2003-85753 JP 2005-228418 A JP 2007-287229 A

  Prior to the present invention, the present inventors have made a multi-drive type optical disc apparatus capable of recording optical discs of a plurality of standards such as a CD (Compact Disc), a DVD (Digital Versatile Disc), and a BD (Blu-ray Disc). Engaged in research and development of large scale integrated circuits (LSIs) for signal processing. At the beginning of this research and development, the inventors examined the background techniques described in Patent Document 2 and Patent Document 3. As a result of the examination, it has been clarified that the techniques described in Patent Document 2 and Patent Document 3 have the following problems.

  That is, in the technique described in Patent Document 2, it is necessary to store a plurality of different recording strategies for each disk manufacturer ID in the storage means. When the number of disk manufacturers increases, the use storage portion of the storage means increases. Therefore, there is a possibility that the memory capacity of the non-volatile memory mounted on the optical disk device is insufficient.

  In the technique described in Patent Document 3, after performing trial writing with various recording strategies, it is necessary to evaluate the reproduction signal quality and calculate the size of the recording power range in each recording strategy. Therefore, in order to select the optimal recording strategy, it is necessary to prepare as many recording strategies as possible, and to perform reproduction signal quality evaluation and power range calculation with all recording strategies, so that the selection time is prolonged. There is a possibility to do.

  The present invention has been made as a result of the examination by the present inventors prior to the present invention as described above.

  Therefore, an object of the present invention is to select an optimal recording strategy efficiently.

  The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

  A typical one of the inventions disclosed in the present application will be briefly described as follows.

  That is, a typical embodiment of the present invention includes a motor control circuit (47), a laser control circuit (46), a pickup position control circuit (45), a signal detection circuit (41, 42), a control unit (43), A semiconductor integrated circuit (4) that includes a memory (44) and can be mounted on an optical disk device.

  The motor control circuit (47) supplies a motor control signal (S01) to the motor (2) that rotationally drives the optical disc (1) in response to an instruction from the control unit (43).

  The laser control circuit (46) supplies a laser control signal (S03) to the pickup (3) that irradiates the optical disk (1) with laser light for data recording in response to an instruction from the control unit (43).

  The pickup position control circuit (45) supplies a position control signal (S02) for moving the pickup (3) to the pickup (3) in response to an instruction from the control unit (43).

  The signal detection circuit (41, 42) supplies measurement information (S06) to the control unit (43) in response to a read signal (S04) for data reproduction of the pickup (3).

  The memory (44) stores information of the control unit (43) (see FIG. 1).

  The control unit (43) calculates a plurality of initial strategies from one standard initial strategy (FIG. 3: F0203), and the recording laser power of the laser light during the data recording is changed according to the plurality of initial strategies. Then, a plurality of evaluation data is recorded on the optical disc (1) (FIG. 3: F0204).

  With respect to the plurality of evaluation data of data reproduction of the optical disc (1) by the signal detection circuit (41, 42), the control unit (43) performs signal quality evaluation (FIG. 3: F0204).

  The control unit (43) selects one of the plurality of initial strategies as an adjustment start strategy based on the result of the evaluation of the signal quality (FIG. 3: F0206).

  The control unit (43) determines an optimum recording strategy to be used for actual recording on the optical disc (1) based on the adjustment start strategy (FIG. 2: F05).

  The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows.

  That is, according to the present invention, an optimal recording strategy can be selected efficiently.

FIG. 1 is a diagram showing a configuration of an optical disc apparatus according to Embodiment 1 of the present invention. FIG. 2 is a diagram showing an operation flow when the recording strategy adjustment is executed in the optical disc apparatus according to the first and second embodiments of the present invention shown in FIG. FIG. 3 shows from the start to the end of the adjustment start strategy selection in the process of step F02 of the adjustment start strategy selection (coarse adjustment) of the operation flow of the recording strategy adjustment according to the first and second embodiments of the present invention shown in FIG. It is a figure which shows the flow of. FIG. 4 is a diagram for explaining signal quality evaluation in step F0204 of step F02 of adjustment start strategy selection (coarse adjustment) according to Embodiment 1 of the present invention shown in FIG. FIG. 5 is a diagram for explaining the recording strategy optimization (fine adjustment) in step F03 of the operation flow of the recording strategy adjustment according to the first embodiment of the present invention shown in FIG. FIG. 6 is a diagram for explaining the target beta adjustment in step F05 in the operation flow of the recording strategy adjustment according to the first embodiment of the present invention shown in FIG. FIG. 7 is a diagram showing an example of the initial strategy selected in the initial strategy selection of step F0203 included in step F02 of the adjustment start strategy selection (coarse adjustment) according to the first embodiment of the present invention shown in FIG. . FIG. 8 is also a diagram showing an example of the initial strategy selected by the initial strategy selection of step F0203 included in step F02 of the adjustment start strategy selection (coarse adjustment) according to the first embodiment of the present invention shown in FIG. . FIG. 9 is a diagram showing a configuration of an optical disc device according to Embodiment 2 of the present invention. FIG. 10 is a diagram for explaining signal quality evaluation in step F0204 of the operation flow in step F02 of the adjustment start strategy selection (coarse adjustment) in FIG. 3 in the case of the second embodiment of the present invention. FIG. 11 is a diagram for explaining the operation flow of step F03 of recording strategy optimization (fine adjustment) of the recording strategy adjustment of FIG. 2 in the case of the second embodiment of the present invention. FIG. 12 is a diagram for explaining the operation flow of step F05 in target beta adjustment of recording strategy adjustment in FIG. 2 in the case of the second embodiment of the present invention. FIG. 13 is a diagram showing an outline of edge shift amounts in the multi-pulse type recording strategy and the castle type recording strategy executed by the optical disc apparatus according to Embodiment 1 of the present invention shown in FIG. FIG. 14 shows an operation flow when the recording strategy adjustment of the third embodiment of the present invention is performed in the optical disk device of FIG. 1 according to the first embodiment of the present invention or the optical disk device of FIG. 9 according to the second embodiment of the present invention. FIG. FIG. 15 shows an operation flow when the recording strategy adjustment of the fourth embodiment of the present invention is performed in the optical disk device of FIG. 1 according to the first embodiment of the present invention or the optical disk device of FIG. 9 according to the second embodiment of the present invention. FIG. FIG. 16 shows an operation flow when the recording strategy adjustment of the fifth embodiment of the present invention is performed in the optical disk device of FIG. 1 according to the first embodiment of the present invention or the optical disk device of FIG. 9 according to the second embodiment of the present invention. FIG.

1. First, an outline of a typical embodiment of the invention disclosed in the present application will be described. The reference numerals of the drawings referred to with parentheses in the outline description of the representative embodiments merely exemplify what are included in the concept of the components to which the reference numerals are attached.

  [1] A typical embodiment of the present invention includes a motor control circuit (47), a laser control circuit (46), a pickup position control circuit (45), a signal detection circuit (41, 42), and a control unit (43). And a memory (44), and is a semiconductor integrated circuit (4) that can be mounted on an optical disk device.

  In response to a motor control instruction (S09) from the control unit (43), the motor control circuit (47) performs motor control on the motor (2) that rotationally drives the optical disc (1) mounted on the optical disc apparatus. The signal (S01) can be supplied.

  In response to a laser control instruction (S08) from the control unit (43), the laser control circuit (46) lasers a pickup (3) that irradiates the surface of the optical disc (1) with laser light for data recording. The control signal (S03) can be supplied.

  The pickup position control circuit (45) is a position control for moving the pickup (3) in the radial direction of the optical disc (1) in response to a position control instruction (S07) from the control unit (43). The signal (S02) can be supplied to the pickup (3).

  The signal detection circuit (41, 42) receives measurement information (S06) in response to a read signal (S04) for data reproduction from the pickup (3) that receives the reflected light from the surface of the optical disc (1). It can be supplied to the control unit (43).

  The memory (44) is capable of storing information for the control unit (43) (see FIG. 1).

  The control unit (43) can calculate a plurality of initial strategies from one standard initial strategy (FIG. 3: F0203), and records the laser light during the data recording according to the plurality of initial strategies. A plurality of evaluation data can be recorded on the optical disc (1) by changing the laser power (FIG. 3: F0204).

  With respect to the plurality of evaluation data reproduced from the optical disc (1) by the signal detection circuit (41, 42), the control unit (43) can perform signal quality evaluation (FIG. 3). : F0204).

  The control unit (43) can select one of the plurality of initial strategies as an adjustment start strategy based on the result of the evaluation of the signal quality (FIG. 3: F0206).

  The control unit (43) determines an optimum recording strategy to be used for actual recording on the optical disc (1) based on the adjustment start strategy (FIG. 2: F05).

  According to the embodiment, the optimum recording strategy can be selected efficiently.

  In a preferred embodiment, the optimum recording strategy is the adjustment start strategy itself (see FIG. 16).

  In another preferred embodiment, it is possible to record and evaluate other evaluation data by changing the shift amount of the leading edge or trailing edge of the mark recorded on the optical disc (1) according to the adjustment start strategy. (FIG. 2: F03).

  The control unit (43) determines the optimum recording strategy based on the recording of the other evaluation data and the evaluation (see FIG. 15).

  In a more preferred embodiment, the control unit (43) adds or subtracts a predetermined amount to the shift amount of the leading edge or trailing edge of the mark recorded on the optical disc (1) according to the one standard initial strategy. When executed, the control unit (43) calculates the plurality of initial strategies from the one standard initial strategy (FIG. 3: F0203).

  In another more preferred embodiment, the control unit (43) calculates the one standard initial strategy using a recommended strategy recorded in the disc management information of the optical disc (1). It is what.

  In a specific embodiment, the semiconductor integrated circuit (4) includes the motor control circuit (47), the laser control circuit (46), the pickup position control circuit (45), and the signal detection circuit (41, 42). ), The control unit (43), and the memory (44), each semiconductor chip is configured in the form of a system-in-package (SIP) or a multi-chip module (MCM) built in the package. It is.

  In a more specific embodiment, the signal detection circuit (41, 42) is capable of reading out data reproduction from a plurality of standard optical discs (1), thereby mounting the semiconductor integrated circuit (4). The optical disc apparatus to be configured can be configured as a multi-drive type optical disc apparatus.

  In the most specific embodiment, the control unit (43) includes the motor control circuit (47), the laser control circuit (46), and the pickup position control circuit (software) stored in the memory (44). 45) and a microcontroller for controlling the operation of the signal detection circuits (41, 42).

  [2] A typical embodiment of another aspect of the present invention includes a motor control circuit (47), a laser control circuit (46), a pickup position control circuit (45), a signal detection circuit (41, 42) and a control. This is a method of operating a semiconductor integrated circuit (4) that includes a unit (43) and a memory (44) and can be mounted on an optical disc apparatus.

  In response to a motor control instruction (S09) from the control unit (43), the motor control circuit (47) performs motor control on the motor (2) that rotationally drives the optical disc (1) mounted on the optical disc apparatus. The signal (S01) can be supplied.

  In response to a laser control instruction (S08) from the control unit (43), the laser control circuit (46) lasers a pickup (3) that irradiates the surface of the optical disc (1) with laser light for data recording. The control signal (S03) can be supplied.

  The pickup position control circuit (45) is a position control for moving the pickup (3) in the radial direction of the optical disc (1) in response to a position control instruction (S07) from the control unit (43). The signal (S02) can be supplied to the pickup (3).

The signal detection circuit (41, 42) receives measurement information (S06) in response to a read signal (S04) for data reproduction from the pickup (3) that receives the reflected light from the surface of the optical disc (1). The memory (44) that can be supplied to the control unit (43) can store information for the control unit (43) (see FIG. 1).

  The control unit (43) can calculate a plurality of initial strategies from one standard initial strategy (FIG. 3: F0203), and records the laser light during the data recording according to the plurality of initial strategies. A plurality of evaluation data can be recorded on the optical disc (1) by changing the laser power (FIG. 3: F0204).

  With respect to the plurality of evaluation data reproduced from the optical disc (1) by the signal detection circuit (41, 42), the control unit (43) can perform signal quality evaluation (FIG. 3). : F0204).

  The control unit (43) can select one of the plurality of initial strategies as an adjustment start strategy based on the result of the evaluation of the signal quality (FIG. 3: F0206).

  The control unit (43) determines an optimum recording strategy to be used for actual recording on the optical disc (1) based on the adjustment start strategy (FIG. 2: F05).

  According to the embodiment, the optimum recording strategy can be selected efficiently.

  [3] A typical embodiment of another aspect of the present invention includes a motor control circuit (47), a laser control circuit (46), a pickup position control circuit (45), a signal detection circuit (41, 42) and a control. This is an optical disk device comprising a unit (43) and a memory (44).

  In response to a motor control instruction (S09) from the control unit (43), the motor control circuit (47) performs motor control on the motor (2) that rotationally drives the optical disc (1) mounted on the optical disc apparatus. The signal (S01) can be supplied.

  In response to a laser control instruction (S08) from the control unit (43), the laser control circuit (46) lasers a pickup (3) that irradiates the surface of the optical disc (1) with laser light for data recording. The control signal (S03) can be supplied.

  The pickup position control circuit (45) is a position control for moving the pickup (3) in the radial direction of the optical disc (1) in response to a position control instruction (S07) from the control unit (43). The signal (S02) can be supplied to the pickup (3).

  The signal detection circuit (41, 42) receives measurement information (S06) in response to a read signal (S04) for data reproduction from the pickup (3) that receives the reflected light from the surface of the optical disc (1). It can be supplied to the control unit (43).

  The memory (44) is capable of storing information for the control unit (43) (see FIG. 1).

  The control unit (43) can calculate a plurality of initial strategies from one standard initial strategy (FIG. 3: F0203), and records the laser light during the data recording according to the plurality of initial strategies. A plurality of evaluation data can be recorded on the optical disc (1) by changing the laser power (FIG. 3: F0204).

  With respect to the plurality of evaluation data reproduced from the optical disc (1) by the signal detection circuit (41, 42), the control unit (43) can perform signal quality evaluation (FIG. 3). : F0204).

  The control unit (43) can select one of the plurality of initial strategies as an adjustment start strategy based on the result of the evaluation of the signal quality (FIG. 3: F0206).

  The control unit (43) determines an optimum recording strategy to be used for actual recording on the optical disc (1) based on the adjustment start strategy (FIG. 2: F05).

  According to the embodiment, the optimum recording strategy can be selected efficiently.

  [4] A typical embodiment of another aspect of the present invention includes a motor control circuit (47), a laser control circuit (46), a pickup position control circuit (45), a signal detection circuit (41, 42) and a control. This is an operation method of an optical disc apparatus including a unit (43) and a memory (44).

  In response to a motor control instruction (S09) from the control unit (43), the motor control circuit (47) performs motor control on the motor (2) that rotationally drives the optical disc (1) mounted on the optical disc apparatus. The signal (S01) can be supplied.

  In response to a laser control instruction (S08) from the control unit (43), the laser control circuit (46) lasers a pickup (3) that irradiates the surface of the optical disc (1) with laser light for data recording. The control signal (S03) can be supplied.

  The pickup position control circuit (45) is a position control for moving the pickup (3) in the radial direction of the optical disc (1) in response to a position control instruction (S07) from the control unit (43). The signal (S02) can be supplied to the pickup (3).

  The signal detection circuit (41, 42) receives measurement information (S06) in response to a read signal (S04) for data reproduction from the pickup (3) that receives the reflected light from the surface of the optical disc (1). It can be supplied to the control unit (43).

  The memory (44) is capable of storing information for the control unit (43) (see FIG. 1).

  The control unit (43) can calculate a plurality of initial strategies from one standard initial strategy (FIG. 3: F0203), and records the laser light during the data recording according to the plurality of initial strategies. A plurality of evaluation data can be recorded on the optical disc (1) by changing the laser power (FIG. 3: F0204).

  With respect to the plurality of evaluation data reproduced from the optical disc (1) by the signal detection circuit (41, 42), the control unit (43) can perform signal quality evaluation (FIG. 3). : F0204).

  The control unit (43) can select one of the plurality of initial strategies as an adjustment start strategy based on the result of the evaluation of the signal quality (FIG. 3: F0206).

  The control unit (43) determines an optimum recording strategy to be used for actual recording on the optical disc (1) based on the adjustment start strategy (FIG. 2: F05).

  According to the embodiment, the optimum recording strategy can be selected efficiently.

2. Details of Embodiment Next, the embodiment will be described in more detail. In all the drawings for explaining the best mode for carrying out the invention, components having the same functions as those in the above-mentioned drawings are denoted by the same reference numerals, and repeated description thereof is omitted.

[Embodiment 1]
<< Configuration of optical disk apparatus >>
FIG. 1 is a diagram showing a configuration of an optical disc apparatus according to Embodiment 1 of the present invention.

  The optical disk apparatus according to the first embodiment of the present invention shown in FIG. 1 includes a spindle motor 2 that rotationally drives a removable optical disk 1, an optical pickup 3, and a large-scale semiconductor integrated circuit for signal processing that performs signal processing. (Hereinafter referred to as LSI) 4.

  As the optical disc 1 to be recorded / reproduced by the optical disc apparatus, an optical disc such as a CD, a DVD, or a BD can be used. However, the present invention is not limited to these disks.

  The spindle motor 2 rotates the optical disc 1 at a predetermined rotational speed by being controlled by a motor control signal S01 from the signal processing LSI 4.

  The optical pickup 3 is controlled in position by the position control signal S02 from the signal processing LSI 4 and thereby moves in the radial direction of the optical disc 1 and moves to a predetermined recording / reproducing position. The semiconductor laser of the optical pickup 3 is laser-pulse controlled by a laser pulse control signal S03 from the signal processing LSI 4, and irradiates the surface of the optical disc 1 with a laser pulse for recording or reproduction. The laser pulse emitted from the semiconductor laser of the optical pickup 3 is reflected on the surface of the optical disc 1 and the light receiving portion of the optical pickup 3 receives the reflected light. The light receiving unit converts the reflected light into an electric signal S04 and outputs it to the signal processing LSI 4.

  The signal processing LSI 4 includes an analog front end (AFE) 41, a signal quality measurement circuit 42, a microcontroller (microcomputer) 43, a semiconductor memory 44, a position control circuit 45, a laser pulse control circuit 46, and a motor control circuit 47. Is included.

  In a specific example, the AFE 41, the signal quality measurement circuit 42, the microcomputer 43, the memory 44, the position control circuit 45, the laser pulse control circuit 46, and the motor control circuit 47 are each configured by a semiconductor chip. Therefore, the signal processing LSI 4 in which the plurality of semiconductor chips are built in the package is configured in the form of SIP (System in Package) or MCM (Multi-chip Module).

  The AFE 41 generates an analog signal S05 by performing analog signal processing such as amplification of the electrical signal S04 output from the optical pickup 3, and outputs the analog signal S05 to the signal quality measurement circuit 42.

  The signal quality measurement circuit 42 measures the signal quality such as the beta value, edge shift amount, and jitter amount of the analog signal S05, calculates the measurement result, and outputs the measurement result information S06 to the microcomputer 43.

  The microcomputer 43 executes control of each hardware of the optical disk device. The microcomputer 43 controls hardware control by software stored in the semiconductor memory 44, and the measurement result information S06 from the signal quality measurement circuit 42 is processed by the software of the microcomputer 43 to adjust the recording strategy. The During the recording strategy adjustment, the microcomputer 43 outputs a position control instruction S07, a laser pulse control instruction S08, and a motor control instruction S09 to the position control circuit 45, laser pulse control circuit 46, and motor control circuit 47, respectively. In addition, the microcomputer 43 appropriately reads and writes data from and to the semiconductor memory 44. The memory 44 is a volatile memory such as a synchronous dynamic memory (SDRAM) or a non-volatile memory such as a flash memory, and data and software programs related to data processing of the microcomputer 43 such as a standard initial strategy. Is stored.

  In response to the position control instruction S07 from the microcomputer 43, the position control circuit 45 outputs a position control signal S02 so as to move the optical pickup 3 to the recording position or the reproduction position.

  In response to a laser pulse control instruction S08 from the microcomputer 43, the laser pulse control circuit 46 outputs a laser pulse control signal S03 to the optical pickup 3 so as to record with the recording strategy designated by the microcomputer 43.

  In response to the motor control instruction S09 from the microcomputer 43, the motor control circuit 47 outputs a motor control signal S01 to the spindle motor 2 so as to rotate the optical disc 1 at a speed designated by the microcomputer 43.

<Recording strategy adjustment operation of optical disc apparatus>
FIG. 2 is a diagram showing an operation flow when executing the recording strategy adjustment in the optical disc apparatus according to Embodiment 1 of the present invention shown in FIG.

  In particular, FIG. 2 shows an operation flow from the start to the end of recording strategy adjustment. The operation flow shown in FIG. 2 shows an operation flow by software processing that operates on the microcomputer 43, but part or all of the operation control can be replaced with hardware processing.

  In step F01 of the recording strategy adjustment in the operation flow of FIG. 2, first, the adjustment number counter Nadj is reset to the initial value “1”, and the adjustment number maximum value Nadjmax and the target jitter value Jtarget are determined. An appropriate counter circuit configured as one of hardware resources inside the microcomputer 43 can be used for the adjustment number counter Nadj. The maximum number of adjustments Nadjmax and the target jitter value Jtarget can be stored in advance in a predetermined storage area of the memory 44, and the microcomputer 43 reads out the predetermined storage area in step F01, whereby the maximum number of adjustments Nadjmax is obtained. A target jitter value Jtarget is determined.

  When step F01 is completed, next, adjustment start strategy selection (coarse adjustment) is executed in step F02. In the coarse adjustment, a plurality of initial strategies are generated based on one standard initial strategy, and the recording laser power is changed by the plurality of initial strategies, and random data as evaluation data is recorded on the surface of the optical disc 1, and the recorded data is reproduced. One type of adjustment start strategy is selected based on the signal quality evaluation result. Detailed description of the coarse adjustment will be described later.

  When step F02 is completed, recording strategy optimization (fine adjustment) is executed in step F03.

  On the other hand, FIG. 13 is a diagram showing an outline of edge shift amounts in the multi-pulse type recording strategy and the castle type recording strategy executed in the optical disc apparatus according to Embodiment 1 of the present invention shown in FIG.

  FIG. 13 shows the relationship between the waveform of the channel clock CLK having the period 1T, the shape of the mark MARK to be recorded on the optical disc, the multi-pulse recording laser pulse waveform STR1, and the castle recording laser pulse waveform STR2. Yes.

  As shown in FIG. 13, the edge shift amount Th of the leading edge pulse of the multi-pulse type recording strategy is the time from the rising edge of the channel clock CLK to the first rising edge of the multi-pulse type recording laser pulse waveform STR1, The edge shift Tt of the trailing edge pulse of the pulse type recording strategy is the time from the rising edge of the channel clock CLK after the mark MARK to the last falling edge of the multi-pulse type recording laser pulse waveform STR1.

  As shown in FIG. 13, the edge shift Th of the leading edge pulse of the castle type recording strategy is the time from the rising edge of the channel clock CLK to the first rising edge of the castle type recording laser pulse waveform STR2, and is the castle type. The edge shift Tt of the trailing edge pulse of the recording strategy is the time from the rising edge of the channel clock CLK after the mark MARK to the last falling edge of the castle type recording laser pulse waveform STR2.

  Whether to use the multi-pulse type or the castle type for the recording laser pulse waveform for recording on the optical disc 1 can be determined according to the type of the optical disc 1 or according to the double speed at the time of high-speed recording. However, it is also possible to determine one of the waveforms. In the recording strategy adjustment operation according to the first embodiment of the present invention shown in FIG. 2, the shape of the recording laser pulse waveform is not limited to that shown in FIG.

  In the fine adjustment step F03, random data as evaluation data is recorded while changing the front edge shift amount Th or the rear edge shift amount Tt of each mark of the adjustment start strategy selected in the coarse adjustment step F02. Based on the evaluation result of the signal quality at the time of reproducing the recorded data, the recording strategy is optimized. The jitter value in the evaluation result is assumed to be Jadj. The smaller this jitter value Jadj, the better the signal quality. A detailed description of the fine adjustment in step F03 will be described later.

  When step F03 is completed, the jitter value Jadj is compared with the target jitter value Jtarget in step F04. In this comparison, when the jitter value Jadj is smaller than the target jitter value Jtarget, the jitter value Jadj has reached the target, so the next target beta adjustment is executed with the recording strategy optimized in step F03 as the optimal recording strategy. If the jitter value Jadj is larger than the target jitter value Jtarget in the comparison, the jitter value has not reached the target, and the number of adjustments Nadj is compared in step F06 described later.

  If the jitter value Jadj is smaller than the target jitter value Jtarget in step F04, target beta adjustment is executed in the next step F05. In this target beta adjustment, the optimum recording laser power and the target beta value are determined. The detailed operation of target beta adjustment in step F05 will be described later.

  When step F05 ends, the recording strategy adjustment shown in FIG. 2 ends normally. After this normal end, in response to an actual recording command from a host PC (personal computer) or the like (not shown), the optical disc apparatus shown in FIG. 1 performs predetermined recording on the recording surface of the optical disc 1 according to the optimum recording strategy. To do.

  Further, after obtaining the optimum recording strategy in step F05, the data of this optimum recording strategy can be held in the memory 44. By doing so, the recording strategy adjustment of the operation flow of FIG. 2 is omitted at the time of starting the system such as when the power supply voltage of the optical disk apparatus is turned on next time, while recording is performed using the optimum recording strategy held in the memory 44. It becomes possible. The optimum recording strategy is not held in the memory 44, but the initial strategy selection information in step F02 or the edge shift amount difference information at each mark length / edge after adjustment from the selected initial strategy in step F05 is stored in the memory. 44 can also be held.

  If the jitter value Jadj is larger than the target jitter value Jtarget in step F04, the adjustment number Nadj is compared in step F06. In the comparison of the number of adjustments in step F06, the number of adjustments Nadj is compared with the number of adjustments Nadjmax. Abnormally ends the recording strategy adjustment of the operation flow. After the abnormal end, the optical disk 1 is unloaded from the optical disk device and a buzzer is sounded to notify the user of the abnormal state. When a status detection command for detecting an abnormal state of the optical disk device is sent from the host PC, the optical disk device shown in FIG. 1 adds information indicating the abnormal state to the read data from the optical disk 1. Information is transmitted to the host PC. If the number of adjustments Nadj is less than the maximum number of adjustments Nadjmax in the comparison in step F06, the number of adjustments Nadj is incremented by “1” in step F07.

  When step F07 ends, readjustment determination is executed in step F08. In the readjustment determination at step F08, the adjustment is started again from the adjustment start strategy selection (coarse adjustment) at step F02 according to the degree of the unachieved target jitter value Jtarget of the jitter value Jadj, or the recording strategy at step F03 is optimized. It is determined whether to execute again from conversion (fine adjustment). For example, if the difference between the jitter value Jadj and the target jitter value Jtarget is larger than a predetermined value, it is determined that re-rough adjustment is performed, and the process returns to step F02 to calculate the initial strategy as shown in FIG. Is something else to do. On the other hand, if the difference between the jitter value Jadj and the target jitter value Jtarget is equal to or smaller than a predetermined value, it is determined that the fine adjustment is performed, and the process returns to step F03 to perform the adjustment that changes the procedure for optimizing the recording strategy. The

<Adjustment start strategy selection (coarse adjustment)>
FIG. 3 shows a flow from the start to the end of the adjustment start strategy selection in the process of step F02 of the adjustment start strategy selection (coarse adjustment) of the operation flow of the recording strategy adjustment according to the first embodiment of the present invention shown in FIG. FIG.

  In the first step F0201 of the adjustment start strategy selection (coarse adjustment) in FIG. 3, first, the coarse adjustment counter Neval is reset to “1” to define the coarse adjustment count maximum value Nevalmax. The maximum value Nevalmax of the number of coarse adjustments coincides with the number of initial strategies, and the numerical value varies depending on the calculation method of the initial strategies. The coarse adjustment counter Neval is a counter that is incremented when processing of one initial strategy is completed.

  When the process of step F0201 is completed, the standard initial strategy is read in the next step F0202. In the reading of the standard initial strategy in step F0202, the microcomputer 43 reads the standard initial strategy previously stored in the memory 44. As the standard initial strategy, for example, a statistical average value of recommended strategies recorded in the disc management information of various optical discs can be used as the standard initial strategy, and the most frequently used strategy among the various recommended optical disc strategies. Can be used as the standard initial strategy, and the method of determining the standard initial strategy is not limited to these.

  When step F0202 is completed, a plurality of initial strategies are calculated by executing initial strategy selection in the next step F0203, and the initial strategy of the plurality of initial strategies is selected for signal quality evaluation. This selection is determined by the value of the coarse adjustment counter Neval at that time. In addition, a plurality of initial strategies before selection are, for example, a recording strategy in which the leading edge shift amount Th of each mark is added by a uniform amount (including a negative number) in the standard initial strategy read in step F0202, or It includes a plurality of calculated strategies such as a recording strategy obtained by adding the trailing edge shift amount Tt by a uniform amount (including a negative number) or a standard initial strategy itself. Here, parameters of the recording strategy other than the front edge shift amount Th and the rear edge shift amount Tt of each mark and the reference recording power may be fixed.

  FIG. 7 is a diagram showing an example of the initial strategy selected in the initial strategy selection of step F0203 included in step F02 of the adjustment start strategy selection (coarse adjustment) according to the first embodiment of the present invention shown in FIG. .

  FIG. 8 is also a diagram showing an example of the initial strategy selected by the initial strategy selection of step F0203 included in step F02 of the adjustment start strategy selection (coarse adjustment) according to the first embodiment of the present invention shown in FIG. .

  Note that the initial strategy 1 in FIGS. 7 and 8 represents a standard initial strategy.

  FIG. 7 shows an example of the front edge shift amount Th and the rear edge shift amount Tt of the marks for the combinations of the marks 3M to 6M and the spaces 3S to 6S, and the unit is step. 1step = 1 / 16T; T is the channel clock period). FIG. 7 shows all of the initial strategies. The leading edge shift amount Th and the trailing edge shift amount Tt of the initial strategy 2 to the initial strategy 9 are the leading edge shift amount Th of each mark of the standard initial strategy (initial strategy 1). This is a recording strategy obtained by uniformly adding or subtracting the trailing edge shift amount Tt by 5 steps. In FIG. 7, 3M to 6M and 3S to 6S represent 3T marks to 6T or more marks, and 3T spaces to 6T or more spaces, respectively.

  In FIG. 8, the horizontal axis represents the front edge shift amount Th and the vertical axis represents the rear edge shift amount Tt, and FIG. 8 shows the distribution of combinations of marks and spaces of the initial strategy 1 to the initial strategy 9. . The arrows S2 to S9 in FIG. 8 indicate that 5T is added to or subtracted from the leading edge shift amount Th and the trailing edge shift amount Tt of the standard initial strategy (initial strategy 1) for the 3T mark (3M) -4T space (4S). It shows how it was done. That is, in FIG. 8, the standard initial strategy (initial strategy 1) is used as a reference. The arrow S2 indicates the leading edge shift amount and trailing edge shift amount of the 3T mark (3M) -4T space (4S) of the initial strategy 2 in which the leading edge shift amount Th is +5 step and the trailing edge shift amount Tt is ± 0 step. Is shown. The arrow S3 indicates the leading edge shift amount and trailing edge shift of the 3T mark (3M) -4T space (4S) of the initial strategy 3 in which the leading edge shift amount Th is -5 steps and the trailing edge shift amount Tt is ± 0 steps. It shows the amount. The arrow S4 indicates the leading edge shift amount and trailing edge shift amount of the 3T mark (3M) -4T space (4S) of the initial strategy 4 in which the leading edge shift amount Th is ± 0 step and the trailing edge shift amount Tt is +5 steps. Is shown. The arrow S5 indicates the leading edge shift amount and trailing edge shift of the 3T mark (3M) -4T space (4S) of the initial strategy 5 in which the leading edge shift amount Th is ± 0 step and the trailing edge shift amount Tt is -5 steps. It shows the amount. An arrow S6 indicates the leading edge shift amount and trailing edge shift amount of the 3T mark (3M) -4T space (4S) of the initial strategy 6 in which the leading edge shift amount Th is -5 steps and the trailing edge shift amount Tt is +5 steps. Is shown. The arrow S7 indicates the front edge shift amount and the rear edge shift amount of the 3T mark (3M) -4T space (4S) of the initial strategy 7 in which the front edge shift amount Th is +5 steps and the rear edge shift amount Tt is +5 steps. It is shown. The arrow S8 indicates the leading edge shift amount and trailing edge shift of the 3T mark (3M) -4T space (4S) of the initial strategy 8 with the leading edge shift amount Th as -5 steps and the trailing edge shift amount Tt as -5 steps. It shows the amount. The arrow S9 indicates the front edge shift amount and the rear edge shift amount of the 3T mark (3M) -4T space (4S) of the initial strategy 9 in which the front edge shift amount Th is +5 steps and the rear edge shift amount Tt is −5 steps. Is shown.

  From FIG. 7 and FIG. 8, the relationship between the standard initial strategy (initial strategy 1) and the initial strategies 2 to 9 is understood as follows. That is, the front edge shift amount Th and the rear edge shift amount Tt of each mark of the 3T mark (3M) -4T space (4S) indicated by the arrows S2 to S9 are based on the standard initial strategy (initial strategy 1). , 5 steps are translated in at least one direction up, down, left and right. That is, in the mark formation on the optical disc, it is assumed that the relative relationship between the front end edge shift amount Th and the rear end edge shift amount Tt between the marks does not differ greatly between the optical discs, and the front end edge shift amount between the optical discs. An initial strategy is set on the assumption that a difference occurs in the laser pulse width determined by Th and the trailing edge shift amount Tt, and the difference in distribution of the leading edge shift amount Th and trailing edge shift amount Tt of each mark is set. Is adjusted by recording strategy optimization (fine adjustment) (step F03 in FIG. 2) and target beta adjustment (step F05 in FIG. 2).

  Returning to the description of the adjustment start strategy selection (coarse adjustment) according to the first embodiment of the present invention shown in FIG.

  When the initial strategy selection in step F0203 in FIG. 3 is completed, signal quality evaluation is executed in the next step F0204 using the initial strategy determined by the initial strategy selection in step F0203. In the signal quality evaluation in step F0204, recording of random data as evaluation data is executed while changing the recording laser power, signal quality measurement is executed after recording, and an evaluation value is calculated by a predetermined evaluation function. . Detailed operation will be described later.

  When the signal quality evaluation in step F0204 is completed, the coarse adjustment counter Neval is compared with the coarse adjustment count maximum value Nevalmax in the next step F0205. If the coarse adjustment counter Neval is larger than the coarse adjustment count maximum value Nevalmax in the comparison in step F0205, the adjustment start strategy selection is executed in step F0206. If the coarse adjustment counter Neval is smaller than the coarse adjustment count maximum value Nevalmax in the comparison in step F0205, the coarse adjustment counter Neval is incremented by "1" in step F0207, and then the process returns to the initial strategy selection in the previous step F0203.

  In the adjustment start strategy selection of step F0206, the initial strategy having the largest evaluation value is set as the adjustment start strategy by comparing the evaluation values of the evaluation functions in the initial strategies 1 to 9 obtained in the signal quality evaluation of step F0204. Then, the adjustment start strategy selection in step F0206 of the final process in step F02 of adjustment start strategy selection (coarse adjustment) is completed. Further, by using the adjustment start strategy of step F0206, the recording laser power when performing the recording strategy optimization (fine adjustment) of step F03, which is the next process, is the step of the initial strategy selected by the adjustment start strategy of step F0206. The laser power value is the center of the power margin when the signal quality evaluation of F0204 is performed. Alternatively, it is possible to set the laser power value so that the jitter value becomes the smallest in the power margin.

  If the evaluation value is “0” in all the initial strategies in the comparison of the evaluation values of the evaluation function in the selection of the adjustment start strategy in step F0206, the adjustment start strategy shown in FIG. 3 is not shown. It is determined that re-coarse adjustment similar to the selection (coarse adjustment) is performed, and the calculation method described in the initial strategy selection in step F0203 in FIG. 3 returns to the recording strategy adjustment step F02 in FIG. Can be done in different ways. In addition, by adjusting the target jitter value Jtarget to a large value so that the evaluation value becomes a non- “0” value, this initial strategy can be obtained as an adjustment start strategy so as to obtain the initial strategy.

  In addition, in the adjustment start strategy selection in step F0206, evaluation values are not calculated for the measurement results of all initial strategies, and evaluation values are calculated only for initial strategies in which the power margin is greater than a predetermined threshold in the measurement results. The initial strategy having the largest evaluation value can be set as the adjustment start strategy. The threshold value can also be set as an absolute value, and an evaluation value can be calculated for an initial strategy that is N% or more of the numerical value having the largest power margin in the measurement result.

<< Signal quality evaluation >>
FIG. 4 is a diagram for explaining signal quality evaluation in step F0204 of step F02 of adjustment start strategy selection (coarse adjustment) according to Embodiment 1 of the present invention shown in FIG.

  In the first step F020401 of signal quality evaluation of step F0204 shown in FIG. 4, first, the recording number counter Nrec and the reproduction number counter Nplay are respectively reset to “1” to define the maximum recording / reproduction number Nrpmax. The maximum recording / reproduction number Nrpmax is determined by the recording laser power range and the laser power interval. For example, when the reference power of the standard initial strategy is 100%, the recording laser power range is determined by any laser power of 40% to 150%, and when the recording laser power interval is 10%, the recording laser power range is 40%, 50%, 60%, 70%, 80%, 90%, 100%, 110%, 120%, 130%, 140%, 150% The number of reproductions Nrpmax is defined as 12. Note that the recording laser power range and the laser power interval can be fixed regardless of the optical disk, and can be set to different values depending on the type of the optical disk.

  In the next step F020402, recording laser power determination is executed. In this recording laser power determination, any of the above-described recording laser power ranges of 40%, 50%, 60%, 70%, 80%, 90%, 100%, 110%, 120%, 130%, 140%, 150% The recording laser power is determined to such a value.

  In the next step F020403, motor speed control during recording is executed. In the motor speed control during recording, the microcomputer 43 outputs a motor control instruction S09 to the motor control circuit 47 so that a predetermined recording speed is obtained. Therefore, in response to the motor control instruction S09, the motor control circuit 47 outputs a motor control signal S01 to the spindle motor 2 in order to control the rotation speed of the spindle motor so as to achieve a predetermined recording speed.

  When the control of the rotation speed of the spindle motor 2 to the desired rotation speed is completed in step F020403, the optical pickup position control during recording is executed in the next step F020404. In this optical pickup position control during recording, the microcomputer 43 outputs a position control instruction S07 to the position control circuit 45 so as to move the optical pickup 3 to the area of the optical disc 1 where recording is performed for signal quality evaluation. Then, in response to the position control instruction S07, the position control circuit 45 outputs a position control signal S02 to the optical pickup 3 so as to move the optical pickup 3 to this area.

  When the movement of the optical pickup 3 to a desired position is completed in step F020404, random data as evaluation data is recorded on the optical disc 1 by the initial strategy selected in the previous step F0203 in the next step F020405. In this recording, the microcomputer 43 outputs a laser pulse control instruction S08 to the laser pulse control circuit 46 so as to perform recording with the initial strategy selected in step F0203 in order to execute signal quality evaluation. Then, in response to the laser pulse control instruction S08, the laser pulse control circuit 46 outputs a laser pulse control signal S03 to the optical pickup 3 at a predetermined address position on the optical disc 1, and recording of a predetermined size is executed.

  When recording of a predetermined size is completed in step F020405, a comparison between the recording number counter Nrec and the maximum recording / reproducing number Nrpmax is executed in the next step F020406. If the value of the recording number counter Nrec is larger than the maximum recording / reproducing number Nrpmax in this comparison, the recording in the predetermined laser power range is completed, and then the reproducing is executed after step F020407. When the value of the recording number counter Nrec is smaller than the maximum recording / reproducing number Nrpmax in comparison, the recording number counter Nrec is incremented by “1” in step F02041, and then the process returns to step F020402 to determine a different recording laser power. Further, recording of a predetermined size is performed in an area different from the area previously recorded in steps F020403, F020404, and F020405.

  When the value of the recording number counter Nrec is larger than the maximum recording / reproducing number Nrpmax in the comparison in step F020406, the motor speed control during reproduction is executed in step F020407. In the motor rotation speed control during reproduction, the microcomputer 43 outputs a motor control instruction S09 to the motor control circuit 47 so that a predetermined reproduction speed is obtained. In response to the motor control instruction S09, the motor control circuit 47 outputs a motor control signal S01 to the spindle motor 2 in order to control the rotation speed of the spindle motor 2 so as to achieve a predetermined reproduction speed.

  When the control of the rotation speed of the spindle motor 2 to the desired rotation speed is completed in step F020407, reproduction optical pickup position control is executed in the next step F020408. In this reproduction optical pickup position control, the microcomputer 43 outputs a position control instruction S07 to the position control circuit 45 so as to move the optical pickup 3 to the area of the optical disk 1 on which recording for signal quality evaluation has been performed. Then, in response to the position control instruction S07, the position control circuit 45 outputs a position control signal S02 to the optical pickup 3 so that the optical pickup 3 moves to this area.

  When the processing of optical pickup position control during reproduction in step F020408 is completed, signal quality measurement is performed by reproducing the optical disc 1 in the next step F020409. In this signal quality measurement, the microcomputer 43 outputs a laser pulse control instruction S08 to the laser pulse control circuit 46 so as to execute reproduction for performing signal quality evaluation. In response to the laser pulse control instruction S08, the laser pulse control circuit 46 executes reproduction by outputting a laser pulse control signal S03 to the optical pickup 3 at a predetermined address position on the optical disc 1. The optical pickup 3 irradiates the optical disc 1 with a laser, receives the reflected light from the optical disc 1, converts this reflected light into an electric signal S04, and outputs it to the AFE 41 of the signal processing LSI 4. Then, the AFE 41 generates an analog signal S05 by executing analog signal processing such as amplification of the electric signal S04 and outputs the analog signal S05 to the signal quality measurement circuit 42. The signal quality measurement circuit 42 measures the jitter amount of the analog signal S05, calculates the measurement result, and outputs the measurement result information S06 to the microcomputer 43. Then, the microcomputer 43 stores the measurement result information S06 in the memory 44.

  When the signal quality measurement in step F020409 is completed, in the next step F020410, the reproduction number counter Nplay is compared with the maximum recording / reproduction number Nrpmax. When the value of the reproduction number counter Nplay is larger than the maximum recording / reproduction number Nrpmax, the signal quality measurement has been completed, and therefore the evaluation function calculation is executed in the next step F020411. If the value of the reproduction number counter Nplay is smaller than the maximum recording / reproduction number Nrpmax in the comparison in step F020410, the reproduction number counter Nplay is incremented by “1” in step F020413, and then the process returns to step F020407, and further by steps F020408 and F020409. The signal quality measurement is performed by performing reproduction of an area different from the previously recorded area.

  If the reproduction number counter Nplay is larger than the maximum recording / reproduction number Nrpmax in step F020410, the evaluation function calculation is executed in the next step F020411. The following function Feval is used as the evaluation function of the calculation in step F020411.

  Feval = SUM (Jtarget-J (k))

  Here, k is a sample point in signal quality measurement that satisfies the relationship of J (k) ≦ Jtarget in relation to jitter, and J (k) is a jitter value at the sample point k.

  The evaluation function Feval is such that the greater the power margin and the smaller the jitter value, the greater the value of the computation result, and the greater the value of the computation result, the better the signal quality. The microcomputer 43 stores the calculation result of the evaluation function Feval in the memory 44, and the signal quality evaluation process in step F0204 in FIG.

<Optimization of recording strategy (fine adjustment)>
FIG. 5 is a diagram for explaining the recording strategy optimization (fine adjustment) in step F03 of the operation flow of the recording strategy adjustment according to the first embodiment of the present invention shown in FIG.

  In the first step F0301 of the recording strategy optimization (fine adjustment) process shown in FIG. 5, the microcomputer 43 first determines the mark length and the edge (front edge or rear edge) to be adjusted.

  In the next step F0302, the adjustment range of the edge shift amount for the mark length and the edge determined in step F0301 is determined. For example, the adjustment width is 5 steps before and after the adjustment start strategy. Here, the adjustment width of the edge shift amount is, for example, 1 step = 1 / 16T (T is a channel clock period).

  After the edge shift amount adjustment width is determined in step F0302, the next step F0303 determines the recording strategy by determining the front end edge shift amount or the rear end edge shift amount related to the mark length within the range of the adjustment width. . At this time, the edge shift amount and parameters of the other marks are one type of adjustment start strategy selected by the adjustment start strategy selection (coarse adjustment) described in FIG. 3 at the beginning of the recording strategy optimization shown in FIG. The same thing. The other cases will be described in the description of step F0313. Further, the mark length to be adjusted at this time may be one type, and a plurality of types of mark lengths can be adjusted in parallel.

  After the recording strategy is determined in step F0303, motor speed control during recording is executed in the next step F0304. In this recording motor rotation speed control, the microcomputer 43 outputs a motor control instruction S09 to the motor control circuit 47 so that a predetermined recording speed is obtained. Then, in response to the motor control instruction S09, the motor control circuit 47 outputs to the spindle motor 2 a motor control signal S01 for controlling the rotation speed of the spindle motor 2 so as to achieve a predetermined recording speed.

  When the control of the rotational speed of the spindle motor 2 to the desired rotational speed is completed in step F0304, the optical pickup position control during recording is executed in the next step F0305. In this optical pickup position control during recording, the microcomputer 43 outputs a position control instruction S07 to the position control circuit 45 so as to move the optical pickup 3 to the area of the optical disc 1 where recording for fine adjustment is executed. Then, the position control circuit 45 outputs a position control signal S02 to the optical pickup 3 so that the optical pickup 3 moves to this region.

  When the movement of the optical pickup 3 to a desired position is completed in step F0305, in the next step F0306, random data as evaluation data is recorded on the optical disc 1 according to the recording strategy determined in step F0303. In this recording, the microcomputer 43 outputs a laser pulse control instruction S08 to the laser pulse control circuit 46 so as to record with the recording strategy determined in step F0303. Then, in response to the laser pulse control instruction S08, the laser pulse control circuit 46 outputs a laser pulse control signal S03 to the optical pickup 3 at a predetermined address position on the optical disc 1, thereby executing recording of a predetermined size. .

  When the execution of recording of a predetermined size is completed in step F0306, it is determined in the next step F0307 whether or not all the recording has been completed for the adjustment width determined in the previous step F0302. If it is determined in step F0307 that all recording has been completed, reproduction is executed by the processing in step F0308 and subsequent steps. If it is determined in step F0307 that all recording has not been completed, the process returns to the previous step F0303, the recording strategy is changed, and recording of a predetermined size is performed in an area different from the area previously recorded by steps F0304 to F0306. Executed.

  If it is determined in step F0307 that all recording has been completed, motor speed control during reproduction is executed in step F0308. In this motor speed control during reproduction, the microcomputer 43 outputs a motor control instruction S09 to the motor control circuit 47 so that a predetermined reproduction speed is obtained. Then, in response to the motor control instruction S09, the motor control circuit 47 outputs a motor control signal S01 for controlling the rotation speed of the spindle motor 2 to the spindle motor 2 so as to achieve a predetermined reproduction speed.

  When the control of the rotation speed of the spindle motor 2 to the desired rotation speed is completed in step F0308, reproduction optical pickup position control is executed in step F0309. In this optical pickup position control during reproduction, the microcomputer 43 outputs a position control instruction S07 to the position control circuit 45 so as to move the optical pickup 3 to the area of the optical disc 1 where recording has been completed. Then, in response to the position control instruction S07, the position control circuit 45 outputs a position control signal S02 to the optical pickup 3 so that the optical pickup 3 moves to this region.

  When the position control process in step F0309 is completed, the optical disc 1 is reproduced in step F0310, and signal quality measurement is executed. In this signal quality measurement, the microcomputer 43 outputs a laser pulse control instruction S08 to the laser pulse control circuit 46 so as to execute reproduction for performing signal quality evaluation. In response to the laser pulse control instruction S08, the laser pulse control circuit 46 outputs a laser pulse control signal S03 to the optical pickup 3 at a predetermined address position on the optical disc 1, and reproduction is executed. That is, the optical pickup 3 irradiates the optical disc 1 with a laser, receives the reflected light from the optical disc 1, converts the reflected light into an electric signal S04, and outputs it to the AFE 41 of the signal processing LSI 4. The AFE 41 generates an analog signal S05 by executing analog signal processing such as amplification of the electric signal S04 and outputs the analog signal S05 to the signal quality measurement circuit 42. The signal quality measurement circuit 42 measures the jitter amount of the analog signal S05, calculates the measurement result, and outputs the measurement result information S06 to the microcomputer 43. Then, the microcomputer 43 stores the measurement result information S06 in the memory 44.

  When the signal quality measurement process in step F0310 ends, it is determined in step F0311 whether all signal quality measurements within the adjustment range determined in the previous step F0302 have been completed. If it is determined that all signal quality measurements within the range of the adjustment width have been completed, the edge shift amount is determined in the next step F0312. If it is determined in step F0311 that all signal quality measurements in the adjustment range are not completed, the process returns to step F0308, step F0309, and step F0310, and signal quality measurement in another region is performed.

  In the determination of the edge shift amount in step F0312, the measurement result information stored in the memory 44 is read out, the shift position with the smallest jitter amount is obtained, and the edge shift amount at that time is determined for the mark length and the edge. Determined as the optimal recording strategy. Also, in determining the edge shift amount, the characteristics of jitter amount vs. edge shift amount are acquired, and the edge shift amount having the minimum value in the approximate curve approximating the characteristic is determined as the mark length and the optimum recording strategy of the edge. You can also

  When the edge shift amount determination processing in step F0312 is completed, it is determined in the next step F0313 whether or not adjustment has been completed for all mark lengths and edges. If it is determined in step F0313 that the adjustment has been completed for all the mark lengths and edges, the recording strategy optimization (fine adjustment) processing in FIG. 5 is terminated with the recording strategy at that time as the optimum recording strategy. Otherwise, in order to adjust the mark length and the edge that have not been adjusted, the process returns to the processing after Step F0301, and the same fine adjustment is executed.

《Target beta adjustment》
FIG. 6 is a diagram for explaining the target beta adjustment in step F05 in the operation flow of the recording strategy adjustment according to the first embodiment of the present invention shown in FIG.

  In the first step F0501 of target beta adjustment shown in FIG. 6, first, the recording number counter Nbetarec and the reproduction number counter Nbetaplay are respectively reset to “1” to define the maximum recording / reproduction number Nbetarpmax.

  In the next step F0502, recording laser power determination is executed. In this recording laser power determination, any power within the recording laser power range described in step F020401 of the signal quality evaluation process shown in FIG. 4 is determined. The recording laser power range can be the same as the range determined in step F020402 of the signal quality evaluation process shown in FIG. 4, or can be a different range.

  In the next step F0503, motor speed control during recording is executed. In this recording motor rotation speed control, the microcomputer 43 outputs a motor control instruction S09 to the motor control circuit 47 so as to achieve a predetermined recording speed. Then, in response to the motor control instruction S09, the motor control circuit 47 outputs a motor control signal S01 for controlling the rotation speed of the spindle motor 2 to the spindle motor 2 so as to achieve a predetermined recording speed.

  When the control of the rotation speed of the spindle motor 2 to the desired rotation speed is completed in step F0503, the optical pickup position control during recording is executed in the next step F0504. In this optical pickup position control during recording, the microcomputer 43 outputs a position control instruction S07 so that the optical pickup 3 moves to the area of the optical disc 1 where recording is performed for the target control circuit 45 to execute target beta adjustment. In response to the position control instruction S07, the position control circuit 45 outputs a position control signal S02 to the optical pickup 3 so that the optical pickup 3 moves to this area.

  When the movement of the optical pickup 3 to the desired position in Step F0504 is completed, Step F03 determined by comparing the jitter value Jadj and the target jitter value Jtarget in Step F04 of the recording strategy adjustment in FIG. 2 in the next Step F0505. Recording of random data as evaluation data is performed on the optical disc 1 with the optimum recording strategy optimized in (1). In this recording, the microcomputer 43 outputs a laser pulse control instruction S08 to the laser pulse control circuit 46 so as to perform recording with the optimum recording strategy determined in the recording strategy adjustment step F04 in FIG. In response to the laser pulse control instruction S08, the laser pulse control circuit 46 outputs a laser pulse control signal S03 to the optical pickup 3 at a predetermined address position on the optical disc 1, and recording of a predetermined size is executed.

  When the recording of a predetermined size is completed in step F0505, the recording number counter Nbetarec and the maximum recording / reproducing number Nbetarpmax are compared in the next step F0506. In this comparison, if the recording number counter Nbetarec is larger than the maximum recording / reproducing number Nbetarpmax, recording in the predetermined laser power range has been completed, and therefore reproduction is executed in the next step F0507 and subsequent steps. If the recording number counter Nbetarec is smaller than the maximum recording / reproducing number Nbetarpmax in the comparison in step F0506, the recording number counter Nbetarec is incremented by “1” in step F0512, and then the recording laser power is determined by returning to the previous step F0502. Further, recording of a predetermined size is executed in an area different from the area previously recorded in steps F0503, F0504, and F0505.

  If the recording number counter Nbetarec in the comparison in step F0506 is larger than the maximum recording / reproducing number Nbetarpmax, reproduction motor speed control is executed in step F0507. In this motor rotation speed control during reproduction, the microcomputer 43 outputs a motor control instruction S09 to the motor control circuit 47 so as to achieve a predetermined reproduction speed. Then, in response to the motor control instruction S09, the motor control circuit 47 outputs a motor control signal S01 for controlling the rotation speed of the spindle motor 2 to the spindle motor 2 so as to achieve a predetermined reproduction speed.

  When the control of the rotation speed of the spindle motor 2 to the desired rotation speed is completed in step F0507, reproduction optical pickup position control is executed in the next step F0508. In this reproduction optical pickup position control, the microcomputer 43 outputs a position control instruction S07 so as to move the optical pickup 3 to the area of the optical disc 1 where recording for target beta adjustment has been performed. In response to the position control instruction S07, the position control circuit 45 outputs a position control signal S02 to the optical pickup 3 so that the optical pickup 3 moves to this region.

  When the pickup position control process in step F0508 is completed, the optical disk 1 is reproduced in the next step F0509, and signal quality measurement is executed.

  In the signal quality measurement in step F0509, the microcomputer 43 outputs a laser pulse control instruction S08 to the laser pulse control circuit 46 so as to execute reproduction for performing signal quality evaluation. In response to the laser pulse control instruction S08, the laser pulse control circuit 46 outputs a laser pulse control signal S03 to the optical pickup 3 at a predetermined address position on the optical disc 1, and reproduction is executed. The optical pickup 3 irradiates the optical disc 1 with a laser, receives the reflected light from the optical disc 1, converts the reflected light into an electric signal S04, and outputs it to the AFE 41 of the signal processing LSI 4. The AFE 41 performs analog signal processing such as amplification of the electric signal S04 to generate an analog signal S05 and outputs it to the signal quality measurement circuit 42. The signal quality measurement circuit 42 measures the jitter amount and beta value of the analog signal S05, calculates the measurement result, and outputs the measurement result information S06 to the microcomputer 43. Then, the microcomputer 43 stores the measurement result information S06 in the memory 44.

  When the signal quality measurement in step F0509 is completed, in the next step F0510, the reproduction number counter Nbetaplay and the maximum recording / reproduction number Nbetarpmax are compared. If it is determined in this comparison that the reproduction number counter Nbetaplay is larger than the maximum recording / reproduction number Nbetarpmax, the signal quality measurement is completed, so the target beta is determined in the next step F0511. If it is determined in the comparison of step F0509 that the playback count counter Nbetaplay is smaller than the maximum recorded playback count Nbetarpmax, the playback count counter Nbetaplay is incremented by “1” in step F0513, and then the processing in steps F0507, F0508, and F0509 is performed. Returning to, signal quality measurement is performed by performing reproduction of a region different from the previously measured region.

  When it is determined in the comparison of step F0510 that the reproduction number counter Nbetaplay is larger than the maximum recording reproduction number Nbetarpmax, the target beta is determined in step F0511. In this target beta determination, the microcomputer 43 reads the measurement result information stored in the memory 44, and the characteristic of jitter amount versus recording laser power is acquired. The recording power at the location with the best jitter value is set to the recording power at the time of recording the actual data, and the beta value at the location with the best jitter value is stored in the memory 44 as the target beta. This beta value is recording quality or signal quality, and is a ratio of the sum of the maximum value and the minimum value of the AC component to the peak-to-peak amplitude value in the AC component of the reproduced signal waveform by the processing of steps F0507, F0508, and F0509. Yes, the target beta is the target value of the beta value. Therefore, when the recording laser power is adjusted by the operation of optimum power calibration (OPC), the adjustment can be executed using the beta value stored in the memory 44 as the target beta. In determining target beta, when the characteristics of jitter amount vs. recording laser power are acquired, the power that becomes the center of the power margin is set to the recording laser power, and the beta value at this recording laser power is set as the target beta. You can also.

  Thus, according to the first embodiment described above, one recording strategy (standard initial strategy) is prepared, and the leading edge shift amount Th or trailing edge shift amount Tt of each mark of the standard initial strategy is prepared. Multiple recording strategies (initial strategies) that are uniformly added or subtracted are selected, and a recording strategy (adjustment start strategy) with excellent reproduction signal quality is selected from these initial strategies, and the leading edge shift is performed with this adjustment start strategy. It is possible to efficiently adjust the recording strategy by measuring the reproduction signal quality while changing the amount Th or the trailing edge shift amount Tt and performing the adjustment to the optimum recording strategy.

[Embodiment 2]
<< Configuration of other optical disk apparatus >>
FIG. 9 is a diagram showing a configuration of an optical disc device according to Embodiment 2 of the present invention.

  The optical disk apparatus according to the second embodiment of the present invention shown in FIG. 9 is different from the optical disk apparatus according to the first embodiment of the present invention shown in FIG. 1 in that an interface circuit 48 is included. As a result, the optical disk apparatus shown in FIG. 9 can communicate with the external host PC 5 via the interface circuit 48 using the communication path S10 of the standard communication system. The communication path S10 of the standard communication system is, for example, SATA (Serial ATA), USB (Universal Serial Bus), IEEE 1394, or the like. 9 is the same as that of the optical disk apparatus according to the first embodiment of the present invention shown in FIG.

<< Recording strategy adjustment operation of other optical disk apparatus >>
The optical disc apparatus according to the second embodiment of the present invention shown in FIG. 9 is also the optimum recording strategy according to the operation flow of the recording strategy adjusting operation shown in FIG. 2 in the same manner as the optical disc apparatus according to the first embodiment of the present invention shown in FIG. Selection is possible.

  The operation flow of FIG. 2 for the optical disc device according to the second embodiment of the present invention shown in FIG. 9 is different from the operation for the optical disc device according to the first embodiment of the present invention shown in FIG. Only the explanation will be omitted by omitting the explanation.

  Before the determination of the maximum number of adjustments Nadjmax and the target jitter value Jtarget in step F01 in FIG. 2, initial values of the maximum number of adjustments Nadjmax and the target jitter value Jtarget are stored in a memory (not shown) of the host PC 5. Has been. At the time of these determinations in step F01, a central processing unit (CPU) of the host PC 5 reads an initial value stored in a memory (not shown) and, if necessary, the determined value is corrected after the correction. Stored in a memory (not shown).

  In recording with a plurality of initial strategies in step F02 of FIG. 2, the host PC 5 changes the recording laser power with a plurality of initial strategies and records random data as evaluation data on the optical disc 1 via the communication path S10. Command data is transmitted to the optical disk device. After this recording, one type of adjustment start strategy is selected using the host PC 5 based on the evaluation result of the signal quality when reproducing the recording data from the optical disk apparatus.

  When step F02 in FIG. 2 is completed, recording strategy optimization (fine adjustment) is executed in step F03 in FIG. In the fine adjustment step F03, random data as evaluation data is recorded while changing the front edge shift amount Th or the rear edge shift amount Tt of each mark of the adjustment start strategy selected in the coarse adjustment step F02. Command data is transmitted to the optical disc apparatus via the communication path S10. After this recording, the optimization of the recording strategy is executed using the host PC 5 based on the evaluation result of the signal quality at the time of reproducing the recording data from the optical disk device.

  If it is determined in step F04 in FIG. 2 that the jitter value Jadj is smaller than the target jitter value Jtarget, then target beta adjustment is executed in step F05 in FIG. In the target beta adjustment in step F05, command data is transmitted to the optical disc apparatus via the communication path S10 so as to record random data as evaluation data on the optical disc 1 with the optimum recording strategy. After this recording, the optimum recording laser power and the target beta value are determined using the host PC 5 based on the evaluation result of the signal quality at the time of reproducing the recording data from the optical disk apparatus. When step F05 is completed, the host PC 5 transmits command data to the optical disc apparatus via the communication path S10 so that the recording strategy adjustment is normally completed and the optimum recording strategy is stored in the memory 44. Then, the microcomputer 43 receives the command data via the interface circuit 48, and records the optimum recording strategy in the memory 44. After the normal end, in response to the reception of the actual recording command from the host PC 5, the optimum recording strategy recorded in the memory 44 is read and predetermined recording is executed.

<< Adjustment start strategy selection (coarse adjustment) for other optical disk devices >>
The optical disc apparatus according to the second embodiment of the present invention shown in FIG. 9 is also operated by the adjustment start strategy selection (coarse adjustment) operation flow shown in FIG. 3 in the same manner as the optical disc apparatus according to the first embodiment of the present invention shown in FIG. Adjustment start strategy selection (coarse adjustment) is possible.

  In the following, the operation flow of FIG. 3 for the optical disc device according to the second embodiment of the present invention shown in FIG. 9 is different from the operation for the optical disc device according to the first embodiment of the present invention shown in FIG. Only the explanation will be omitted by omitting the explanation.

  In the first step F0201 of the adjustment start strategy selection (coarse adjustment) in FIG. 3, the host PC 5 first resets the coarse adjustment counter Neval to “1” and defines the coarse adjustment count maximum value Nevalmax.

  When the processing in step F0201 is completed, in the next step F0202, the host PC 5 reads out the standard initial strategy from its own memory (not shown).

  When step F0202 ends, in next step F0203, the host PC 5 executes initial strategy selection to calculate a plurality of initial strategies and to select which initial strategy of the plurality of initial strategies is used for signal quality evaluation. To do.

  When the initial strategy selection is completed, signal quality evaluation is executed in the next step F0204 using the initial strategy determined by the initial strategy selection in step F0203. In the signal quality evaluation in step F0204, the host PC 5 transmits a command to the optical disc apparatus via the communication path S10 so as to execute recording of random data as evaluation data while changing the recording laser power. The host PC 5 transmits a command to the optical disc apparatus via the communication path S10 so as to execute signal quality measurement after recording, and calculates an evaluation value by a predetermined evaluation function based on the signal quality data from the optical disc apparatus.

  When the signal quality evaluation in step F0204 is completed, in the next step F0205, the host PC 5 compares the coarse adjustment counter Neval with the coarse adjustment count maximum value Nevalmax. If the coarse adjustment counter Neval is larger than the coarse adjustment count maximum value Nevalmax in the comparison in step F0205, the host PC 5 executes the adjustment start strategy selection in step F0206. If the coarse adjustment counter Neval is smaller than the coarse adjustment count maximum value Nevalmax in the comparison in step F0205, the host PC 5 increments the coarse adjustment counter Neval by “1” in step F0207 and then returns to the initial strategy selection in the previous step F0203. .

  Similar to the operation flow of FIG. 3 in the case of the first embodiment, also in the operation flow of FIG. 3 in the case of the second embodiment, the evaluation values of all the initial strategies for selecting the adjustment start strategy in step F0206 are “0”. If "," the process returns to step F02 of the recording strategy adjustment in FIG. 2 to calculate the initial strategy by a method different from the calculation method described in the initial strategy selection in step F0203 in FIG. In addition, by adjusting the target jitter value Jtarget to a large value so that the evaluation value becomes a non- “0” value, this initial strategy can be obtained as an adjustment start strategy so as to obtain the initial strategy.

  Similar to the operation flow of FIG. 3 in the case of the first embodiment, in the operation flow of FIG. 3 in the case of the second embodiment, the measurement results in all initial strategies are selected in the adjustment start strategy selection in step F0206. It is also possible to calculate an evaluation value only for an initial strategy whose power margin is greater than a predetermined threshold in the measurement result without calculating an evaluation value for the measurement result and set the initial strategy having the largest evaluation value as the adjustment start strategy. . An evaluation value can also be calculated for an initial strategy that is N% or more of the numerical value with the largest power margin in the measurement result.

<< Signal quality evaluation of other optical disk devices >>
FIG. 10 is a diagram for explaining signal quality evaluation in step F0204 of the operation flow in step F02 of the adjustment start strategy selection (coarse adjustment) in FIG. 3 in the case of the second embodiment of the present invention.

  Therefore, in the case of the second embodiment of the present invention shown in FIG. 10, the signal quality evaluation in step F0204 of the operation flow in step F02 of the adjustment start strategy selection (coarse adjustment) in FIG. 3 is the same as that of the present invention shown in FIG. This corresponds to the signal quality evaluation in step F0204 of the operation flow in step F02 of the adjustment start strategy selection (coarse adjustment) in FIG. 3 in the case of the first embodiment.

  In the first step F020421 in FIG. 10 (corresponding to the first step F020401 in FIG. 4), the host PC 5 first resets the recording number counter Nrec and the reproduction number counter Nplay to “1”, and sets the maximum recording / reproduction number Nrpmax. Define.

  In the next step F020422 in FIG. 10 (corresponding to step F020402 in FIG. 4), the host PC 5 determines the recording laser power, and in the next step F020423 in FIG. 10, the host PC 5 transfers the recording command data to the optical disk apparatus. Execute.

  In this recording command data transmission, the host PC 5 is set so that recording is performed in a constant linear velocity (CLV) mode by specifying recording laser power, recording data, recording speed, recording position, recording size, and recording strategy. Transmits command data to the optical disc apparatus. The recording data can be specified by generating random data as evaluation data. In addition, when the optical disk apparatus is equipped with a mode for recording random data as evaluation data, a random data recording mode as evaluation data can be designated. The recording position and recording size can be specified by specifying a recording start address and a recording end address. Such a recording strategy can be specified by the host PC 5 determining an initial strategy at the stage of step F0203 prior to the signal quality evaluation of step F0204 of FIG.

  When the transmission of the recording command data by the host PC 5 in step F020423 is completed, the microcomputer 43 of the optical disc apparatus receives the recording command data via the communication path S10 and the interface circuit 48 in the next step F020424.

  When reception of the recording command data in step F020424 is completed, motor speed control during recording is executed in step F020425 (corresponding to step F020403 in FIG. 4) in FIG. In this motor speed control during recording, the rotational speed of the spindle motor 2 is set from the recording speed designated by the recording command data transmitted from the host PC 5 to the optical disk apparatus.

  When the control of the rotational speed of the spindle motor 2 to the desired rotational speed is completed in step F020425, optical pickup position control during recording is executed in step F020426 (corresponding to step F020404 in FIG. 4) in FIG. With this optical pickup position control during recording, the recording position of the optical pickup 3 is set from the recording position designated by the recording command data transmitted from the host PC 5 to the optical disc apparatus.

  When the movement of the optical pickup 3 to a desired position is completed in step F020426, recording of recording data is executed in step F020427 in FIG. 10 (corresponding to step F020405 in FIG. 4). In this recording, the microcomputer 43 records random data as evaluation data on the optical disc 1 according to the initial strategy specified by the host PC 5 in the stage of step F0203 prior to the signal quality evaluation of step F0204 in FIG.

  When the recording is completed in step F020427, the microcomputer 43 transmits reply data including information indicating whether the recording is successful or unsuccessful to the host PC 5 through the interface circuit 48 and the communication path S10 in step F020428 of FIG.

  When the reply data transmission by the optical disc apparatus in step F020428 is completed, the host PC 5 receives the reply data in step F020429 in FIG.

  When reception of the return data by the host PC 5 in step F020429 is completed, the host PC 5 compares the recording number counter Nrec with the maximum recording / reproduction number Nrpmax in step F020430 (corresponding to step F020406 in FIG. 4) in FIG. . If it is determined in this comparison that the value of the recording number counter Nrec is larger than the maximum recording / reproducing number Nrpmax, the recording in the predetermined laser power range is completed, so the host PC 5 next executes reproduction in step F020432 and subsequent steps. To do. If it is determined by comparison that the value of the recording number counter Nrec is smaller than the maximum recording / reproducing number Nrpmax, the host PC 5 increments the recording number counter Nrec by “1” in step F020431, and then returns to step F020422. The recording laser power is determined, and recording of a predetermined size is performed in an area different from the area previously recorded in steps F020423 to F020427.

  If it is determined in step F020430 that the recording number counter Nrec is larger than the maximum recording / reproduction number Nrpmax, signal quality measurement command data is transmitted from the host PC 5 to the optical disc apparatus in the next step F020432. In this signal quality measurement command data transmission, command data specifying a measurement speed and a measurement position is transmitted to the optical disc apparatus.

  When the transmission of the signal quality measurement command data of the host PC 5 is completed in step F020432, the microcomputer 43 of the optical disc apparatus receives the signal quality measurement command data via the communication path S10 and the interface circuit 48 in the next step F020433.

  When reception of the signal quality measurement command data by the optical disk apparatus is completed in step F020433, motor speed control during reproduction is executed in the next step F020434 (corresponding to step F020407 in FIG. 4) in FIG. In this motor rotation speed control during reproduction, the rotation speed of the spindle motor 2 is set from the measurement speed designated by the signal quality measurement command data transmitted from the host PC 5 to the optical disk apparatus.

  When the control of the number of revolutions of the spindle motor 2 to the desired number of revolutions is completed in step F020434, reproduction optical pickup position control is executed in the next step F020435 in FIG. 10 (corresponding to step F020408 in FIG. 4). In this reproduction optical pickup position control, the reproduction position of the optical pickup 3 is set from the measurement position designated by the signal quality measurement command data transmitted from the host PC 5 to the optical disc apparatus.

  When the reproduction optical pickup position control process in step F020435 is completed, signal quality measurement is performed by reproducing the optical disc 1 in the next step F020436 in FIG. 10 (corresponding to step F020409 in FIG. 4). In this signal quality measurement, the microcomputer 43 stores the measurement result information in the memory 44 as in step F020409 of FIG.

  When the storage of the measurement result information in the memory 44 in step F020436 is completed, in the next step F020437, the microcomputer 43 reads the measurement result information stored in the memory 44 to create signal quality data, and the interface circuit 48 and the communication The data is transmitted to the host PC 5 via the path S10.

  When the transmission of the signal quality data by the optical disc apparatus in step F020437 is completed, the host PC 5 receives the signal quality data in the next step F020438.

  When the reception of the signal quality data in step F020438 is completed, the reproduction number counter Nplay and the maximum recording / reproduction number Nrpmax are compared by the host PC 5 in the next step F020439 (corresponding to step F020410 in FIG. 4) in FIG. When the value of the reproduction number counter Nplay is larger than the maximum recording / reproduction number Nrpmax, the evaluation function calculation is executed in the next step F020441 (corresponding to step F020411 in FIG. 4). If the value of the reproduction counter Nplay is smaller than the maximum recording reproduction number Nrpmax in the comparison in step F020439, the reproduction counter Nplay is incremented by “1” in step F020440 (corresponding to step F020413 in FIG. 4), and then the step Returning to F020432, signal quality measurement is performed by performing reproduction of an area different from the area previously recorded in steps F020434, F020435, and F020436 (corresponding to steps F020407, F020408, and F020409 in FIG. 4).

  When the reproduction counter Nplay is larger than the maximum recording reproduction number Nrpmax in step F020439, the evaluation function calculation (Feval = SUM (Jtarget−J (k)) is performed in step F020441 in FIG. 10 (corresponding to step F020411 in FIG. 4). )).

<< Optimization of recording strategy (fine adjustment) for other optical disk devices >>
FIG. 11 is a diagram for explaining the operation flow of step F03 of recording strategy optimization (fine adjustment) of the recording strategy adjustment of FIG. 2 in the case of the second embodiment of the present invention.

  Therefore, the recording strategy optimization (fine adjustment) of the recording strategy adjustment of FIG. 2 in the case of the second embodiment of the present invention shown in FIG. 11 is the case of the first embodiment of the present invention shown in FIG. This corresponds to the recording strategy optimization (fine adjustment) of the recording strategy adjustment in FIG.

  In the first step F0321 (corresponding to step F0301 in FIG. 5) of the recording strategy optimization (fine adjustment) process shown in FIG. 11, the host PC 5 determines the mark length to be adjusted and the edge (front edge or rear edge). decide.

  In the next step F0322 (corresponding to step F0302 in FIG. 5), the host PC 5 determines the adjustment length of the edge shift amount for the mark length and the edge determined in step F0321.

  After the edge shift amount adjustment width is determined in step F0322, in the next step F0323 (corresponding to step F0303 in FIG. 5), the host PC 5 sets the front edge shift amount or rear edge shift amount related to the mark length to the adjustment width. Determine the recording strategy by deciding within limits.

  In the next step F 0324, the host PC 5 executes recording command data transmission to the optical disc apparatus. In the recording command data transmission in this step F0324, the host PC 5 executes recording command data transfer to the optical disc apparatus in the same manner as in step F020423 in the signal quality evaluation of FIG. The recording strategy at this time is specified by the recording strategy determined by the host PC 5 in step F0323.

  When the recording command data transmission in step F 0324 is completed, in the next step F 0325, the microcomputer 43 of the optical disc apparatus receives the recording command data via the communication path S 10 and the interface circuit 48.

  When the recording command data transmission is completed in step F 0324, the microcomputer 43 of the optical disc apparatus receives the recording command data via the communication path S 10 and the interface circuit 48 in the next step F 0325.

  When reception of the recording command data is completed in step F0325, the microcomputer 43 executes the motor speed control during recording in the next step F0326 (corresponding to step F0304 in FIG. 5). In this recording motor rotation speed control, the rotation speed of the spindle motor 2 is set from the recording speed designated by the recording command data transmitted from the host PC 5 to the optical disk apparatus, as in step F020425 of signal quality evaluation in FIG.

  When the motor speed control during recording is completed in step F0326, the microcomputer 43 performs optical pickup position control during recording in the next step F0327 (corresponding to step F0305 in FIG. 5). In the recording optical pickup position control, the recording position of the optical pickup 3 is set from the recording position designated by the recording command data transmitted from the host PC 5 to the optical disc apparatus, as in step F020426 of signal quality evaluation in FIG.

  When the optical pickup position control during recording is completed in step F0327, in the next step F0328 (corresponding to step F0306 in FIG. 5), the microcomputer 43 is designated by the recording command data on the optical disc 1 with the recording strategy determined by the host PC 5 in step F0323. Record the recorded data. In this recording, the microcomputer 43 records random data as evaluation data on the optical disc 1 in accordance with the recording strategy designated by the host PC 5 in the same manner as the signal quality evaluation step F020427 in FIG.

  When the recording is completed in step F0328, the microcomputer 43 executes reply data transmission in the next step F0329. As for the transmission of the reply data, the microcomputer 43 transmits the reply data to the host PC 5 through the interface circuit 48 and the communication path S10 in the same manner as the signal quality evaluation step F020428 in FIG.

  When the reply data transmission by the optical disk device in step F0329 is completed, the host PC 5 receives the reply data in the next step F0330. As for the reception of the reply data, the host PC 5 receives the reply data in the same manner as the signal quality evaluation step F020429 in FIG.

  When reception of return data by the host PC 5 is completed in step F0330, it is determined whether or not all recording has been completed for the adjustment width determined in step F0322 in the next step F0331 (corresponding to step F0307 in FIG. 5). Is done. If it is determined that all recordings for the adjustment width have been completed, reproduction is executed in the next step F0332 and thereafter. If it is determined that not all recording has been completed with respect to the adjustment width, the process returns to step F0323, and the recording command data is recorded so as to execute recording with a different recording strategy in an area different from the area previously recorded with a predetermined size. Generate and send to the optical disc device.

  If it is determined in step F0331 that all the recordings relating to the adjustment width have been completed, the host PC 5 executes signal quality measurement command data transmission in the next step F0332. In this signal quality measurement command data transmission, the signal quality measurement command data transmission is executed by the host PC 5 to the optical disc apparatus in the same manner as the signal quality evaluation step F020432 in FIG. With this signal quality measurement command data transmission, command data specifying the measurement speed and measurement position is transmitted to the optical disc apparatus.

  When the transmission of the signal quality measurement command data by the host PC 5 is completed in step F0332, the microcomputer 43 of the optical disc apparatus executes reception of the signal quality measurement command data in the next step F0333. In this signal quality measurement command data reception, the microcomputer 43 of the optical disk apparatus receives the signal quality measurement command data via the communication path S10 and the interface circuit 48 in the same manner as the signal quality evaluation step F020433 in FIG.

  When reception of the signal quality measurement command data by the microcomputer 43 is completed in step F0333, in the next step F0334 (corresponding to step F0308 in FIG. 5), the microcomputer 43 executes motor speed control during reproduction. In this motor speed control during reproduction, the rotational speed of the spindle motor 2 is determined from the measurement speed designated by the signal quality measurement command data transmitted from the host PC 5 to the optical disc apparatus, as in the signal quality evaluation step F020434 in FIG. Is set.

  When reception of the motor speed control during reproduction in step F0334 is completed, optical pickup position control during reproduction is executed in the next step F0335 (corresponding to step F0309 in FIG. 5). In this reproduction optical pickup position control, the reproduction position of the optical pickup 3 is set from the measurement position designated by the signal quality measurement command data transmitted from the host PC 5 to the optical disc apparatus, as in the signal quality evaluation step F020435 in FIG. .

  When the reproduction optical pickup position control is completed in step F0335, the optical disk 1 is reproduced in the next step F0336 (corresponding to step F0310 in FIG. 5), and signal quality measurement is executed. In this signal quality measurement, the microcomputer 43 stores the measurement result information in the memory 44 in the same manner as the signal quality evaluation step F020436 in FIG.

  When the signal quality measurement is completed in step F0336, the microcomputer 43 executes signal quality data transmission in the next step F0337. In the transmission of the signal quality data, the microcomputer 43 reads the measurement result information stored in the memory 44 and creates the signal quality data in the same manner as the signal quality evaluation step F020437 in FIG. To the host PC 5 via.

  When the signal quality data transmission by the optical disk device is completed in step F0337, the host PC 5 receives the signal quality data in the next step F0338. In the reception of the signal quality data, the host PC 5 receives the signal quality data in the same manner as the signal quality evaluation step F020438 in FIG.

  When the reception of the signal quality data in step F0338 is completed, the recording strategy is changed in the next step F0339 (corresponding to step F0311 in FIG. 5), and the recording location recorded in step F0328 is adjusted at all locations regarding the adjustment width. It is determined whether the signal quality measurement is complete. If it is determined that the signal quality measurement has been completed at all locations with respect to the adjustment width, the signal quality measurement has been completed, and therefore the edge shift amount is determined in the next step F0340 (corresponding to step F0312 in FIG. 5). . If it is determined that the signal quality measurement has not been completed at all points with respect to the adjustment width, the host PC 5 returns to step F0332, and the host PC 5 performs the signal quality measurement so as to execute the reproduction of the area different from the previously measured area. Command data is transmitted to the optical disk device.

  In the determination of the edge shift amount in step F0340, the edge shift value that is about the minimum value is determined as the adjustment mark length / edge shift amount of the edge in the optimum recording strategy from each measurement result information about the adjustment width. Also, in determining the edge shift amount, the characteristics of jitter amount vs. edge shift amount are acquired, and the edge shift amount having the minimum value in the approximate curve approximating the characteristic is determined as the mark length and the optimum recording strategy of the edge. You can also

  When the edge shift amount determination processing in step F0340 is completed, it is determined in the next step F0341 whether or not adjustment has been completed for all mark lengths and edges. If it is determined in step F0341 that the adjustment has been completed for all the mark lengths and edges, the recording strategy optimization (fine adjustment) process of FIG. 11 is terminated with the recording strategy at that time as the optimum recording strategy. Otherwise, in order to adjust the mark length and the edge that have not been adjusted, the process returns to the processing after Step F0321 and the same fine adjustment is executed.

<< Target beta adjustment of other optical disk devices >>
FIG. 12 is a diagram for explaining the operation flow of step F05 in target beta adjustment of recording strategy adjustment in FIG. 2 in the case of the second embodiment of the present invention.

  Therefore, the target beta adjustment of the recording strategy adjustment of FIG. 2 in the second embodiment of the present invention shown in FIG. 12 is the same as the recording strategy adjustment of FIG. 2 in the first embodiment of the present invention shown in FIG. It corresponds to the target beta adjustment.

  In the first step F0521 of the target beta adjustment in FIG. 12 (corresponding to step F501 in FIG. 6), the host PC 5 first resets the recording number counter Nbetarec and the reproduction number counter Nbetaplay to “1” respectively, and performs maximum recording / reproduction. Define the number Nbetarpmax.

  In the next step F0522 (corresponding to step F502 in FIG. 6), the host PC 5 executes recording laser power determination.

  In the next step F0523, the host PC 5 executes recording command data transmission to the optical disc apparatus. In this recording command data transmission, the host PC 5 executes recording command data transfer to the optical disc apparatus in the same manner as the signal quality evaluation step F020423 in FIG. 10, but the recording strategy is optimized for the storage strategy in the recording strategy adjustment step F03 in FIG. Use the optimum recording strategy obtained in the conversion (fine adjustment).

  When the transmission of the recording command data by the host PC 5 in step F0523 is completed, the microcomputer 43 of the optical disc apparatus receives the recording command data via the communication path S10 and the interface circuit 48 in the next step F0524.

  When reception of the recording command data in step F0524 is completed, in the next step F0525 (corresponding to step F503 in FIG. 6), the microcomputer 43 executes the motor speed control during recording.

  When the recording motor rotation speed control in step F0525 is completed, in the next step F0526 (corresponding to step F504 in FIG. 6), the microcomputer 43 executes optical pickup position control during recording.

  When the optical pickup position control during recording is completed in step F0526, recording is performed in the next step F0527 (corresponding to step F505 in FIG. 6).

  When the recording in step F0527 is completed, in the next step F0528, the microcomputer 43 transmits reply data to the host PC 5 via the interface circuit 48 and the communication path S10.

  When the reply data transmission by the optical disk device in step F0528 is completed, the host PC 5 receives the reply data in the next step F0529.

  When the reception of return data by the host PC 5 in step F0529 is completed, a comparison between the recording number counter Nbetarec and the maximum recording / reproducing number Nbetarpmax is executed in the next step F0530 (corresponding to step F506 in FIG. 6). If it is determined in this comparison that the recording number counter Nbetarec is larger than the maximum recording / reproducing number Nbetarpmax, recording in a predetermined laser power range is completed, and therefore signal quality measurement command data transmission is executed in step F0532. However, if it is determined in this comparison that the recording number counter Nbetarec is smaller than the maximum recording / reproducing number Nbetarpmax, the recording number counter Nbetarec is incremented by “1” in step F0531, and the process returns to step F0522 to return the recording laser power. Recording is performed in an area that is determined and different from the area previously recorded with a predetermined size.

  If it is determined in the comparison in step F0530 that the recording number counter Nbetarec is larger than the maximum recording / reproduction number Nbetarpmax, in the next step F0532, the host PC 5 executes signal quality measurement command data transmission. In the signal quality measurement command data transmission in step F0532, command data specifying the measurement speed and the measurement position is transmitted to the optical disc apparatus in the same manner as the signal quality evaluation step F020432 in FIG.

  When the transmission of the signal quality measurement command data by the host PC 5 in step F0532 is completed, the microcomputer 43 of the optical disc apparatus receives the signal quality measurement command data via the communication path S10 and the interface circuit 48 in the next step F0533.

  When reception of the signal quality measurement command data by the microcomputer 43 in step F0533 is completed, motor speed control during reproduction is executed in the next step F0534 (corresponding to step F507 in FIG. 6).

  When the control of the rotation speed of the spindle motor 2 to the desired rotation speed is completed in step F0534, reproduction optical pickup position control is executed in the next step F0535 (corresponding to step F508 in FIG. 6).

  When the reproduction optical pickup position control in step F0535 is completed, the optical disk 1 is reproduced in the next step F0536 (corresponding to step F509 in FIG. 6), and signal quality measurement is executed.

  When the signal quality measurement in step F0536 is completed, the microcomputer 43 executes signal quality data transmission in the next step F0537. In the transmission of the signal quality data, the microcomputer 43 transmits the signal quality data to the host PC 5 through the interface circuit 48 and the communication path S10 as in the signal quality evaluation step F020437 in FIG.

  When the transmission of the signal quality data by the optical disk device in step F0537 is completed, the host PC 5 receives the signal quality data in the next step F0538.

  When the reception of the signal quality data in step F0538 is completed, in the next step F0539 (corresponding to step F510 in FIG. 6), the host PC 5 compares the reproduction number counter Nbetaplay with the maximum recording / reproduction number Nbetarpmax. If it is determined by this comparison that the reproduction counter Nbetaplay is larger than the maximum recording / reproduction number Nbetarpmax, the signal quality measurement is completed, and therefore the host PC 5 determines the target beta in the next step F0541. If it is determined in the comparison that the playback count counter Nbetaplay is smaller than the maximum recorded playback count Nbetarpmax, after the playback count counter Nbetaplay is incremented by “1” in step F0540, the process returns to step F0532 and is the previously measured area. Different regions are played back and signal quality measurements are performed.

  If it is determined in the comparison in step F0539 that the reproduction number counter Nbetaplay is larger than the maximum recording reproduction number Nbetarpmax, the host PC 5 determines the target beta in step F0541 (corresponding to step F0511 in FIG. 6).

  According to the second embodiment described above, as in the first embodiment, one recording strategy (standard initial strategy) is prepared, and the leading edge shift amount Th of each mark of the standard initial strategy is prepared. Alternatively, a plurality of recording strategies (initial strategies) obtained by uniformly adding or subtracting the trailing edge shift amount Tt are calculated, and a recording strategy (adjustment start strategy) with excellent reproduction signal quality is selected from the initial strategies. It is possible to efficiently adjust the recording strategy by measuring the reproduction signal quality while changing the leading edge shift amount Th or the trailing edge shift amount Tt in the adjustment start strategy, and executing the adjustment to the optimum recording strategy. It becomes.

[Embodiment 3]
FIG. 14 shows an operation flow when the recording strategy adjustment of the third embodiment of the present invention is performed in the optical disk device of FIG. 1 according to the first embodiment of the present invention or the optical disk device of FIG. 9 according to the second embodiment of the present invention. FIG.

  The operation flow of the recording strategy adjustment shown in FIG. 14 according to the third embodiment of the present invention is different from the operation flow shown in FIG. 2 according to the first embodiment and the second embodiment of the present invention in FIG. In this operation flow, the recording strategy optimization (fine adjustment) processing in step F03 and the readjustment determination processing in step F08, which are included in the operation flow in FIG. 2, are omitted.

  That is, in the operation flow of FIG. 14, when the signal quality Jadj in the initial strategy selected in the adjustment start strategy selection (coarse adjustment) in step F02 is smaller than the target jitter value Jtarget, this initial strategy is changed. The recording strategy adjustment is terminated as the optimum recording strategy. On the other hand, if the jitter value Jadj is larger than the target jitter value Jtarget, the number of adjustments is compared in step F06. If the number of adjustments Nadj is less than the maximum adjustment number Nadjmax, the number of adjustments Nadj is set in step F07. After counting up “1”, the process returns to the adjustment start strategy selection (coarse adjustment) in step F02 in order to perform coarse adjustment again.

  Thus, according to the third embodiment described above, one recording strategy (standard initial strategy) is prepared, and the leading edge shift amount Th or trailing edge shift amount Tt of each mark of the standard initial strategy is prepared. By calculating multiple recording strategies (initial strategies) that are uniformly added or subtracted, select a recording strategy (adjustment start strategy) with excellent playback signal quality from these initial strategies, and optimize this adjustment start strategy itself. By using the recording strategy, the recording strategy can be adjusted efficiently.

[Embodiment 4]
FIG. 15 shows an operation flow when the recording strategy adjustment of the fourth embodiment of the present invention is performed in the optical disk device of FIG. 1 according to the first embodiment of the present invention or the optical disk device of FIG. 9 according to the second embodiment of the present invention. FIG.

  The operation flow of the recording strategy adjustment shown in FIG. 15 according to the fourth embodiment of the present invention is different from the operation flow shown in FIG. 2 according to the first embodiment and the second embodiment of the present invention in FIG. In the operation flow, the target beta adjustment process of step F05 included in the operation flow of FIG. 2 is omitted.

  That is, in the operation flow of FIG. 15, when it is determined that the jitter value Jadj is smaller than the target jitter value Jtarget in the comparison in step F04 and the optimum recording strategy is acquired, the recording strategy optimization process is performed in the previous step F03. The beta value at the actual recording laser power is used as the target beta by using the recording laser power at the time of recording in the above as the actual recording laser power.

  As described above, according to the fourth embodiment described above, one recording strategy (standard initial strategy) is prepared, and the leading edge shift amount Th or trailing edge shift amount Tt of each mark of the standard initial strategy is prepared. Multiple recording strategies (initial strategies) that are uniformly added or subtracted are selected, and a recording strategy (adjustment start strategy) with excellent reproduction signal quality is selected from these initial strategies, and the leading edge shift is performed with this adjustment start strategy. It is possible to efficiently adjust the recording strategy by measuring the reproduction signal quality while changing the amount Th or the trailing edge shift amount Tt and performing the adjustment to the optimum recording strategy.

[Embodiment 5]
FIG. 16 shows an operation flow when the recording strategy adjustment of the fifth embodiment of the present invention is performed in the optical disk device of FIG. 1 according to the first embodiment of the present invention or the optical disk device of FIG. 9 according to the second embodiment of the present invention. FIG.

  The operation flow of the recording strategy adjustment shown in FIG. 16 according to the fifth embodiment of the present invention is different from the operation flow shown in FIG. 14 according to the third embodiment of the present invention in that the operation flow of FIG. The point beta adjustment process of step F05 included in the operation flow is omitted.

  As described above, according to the fifth embodiment described above, one recording strategy (standard initial strategy) is prepared, and the leading edge shift amount Th or trailing edge shift amount Tt of each mark of the standard initial strategy is prepared. By calculating multiple recording strategies (initial strategies) that are uniformly added or subtracted, select a recording strategy (adjustment start strategy) with excellent playback signal quality from these initial strategies, and optimize this adjustment start strategy itself. By using the recording strategy, the recording strategy can be adjusted efficiently.

  As mentioned above, the invention made by the present inventor has been specifically described based on various embodiments. However, the present invention is not limited thereto, and various modifications can be made without departing from the scope of the invention. Needless to say.

  For example, in the first embodiment, the AFE 41, the signal quality measurement circuit 42, the microcomputer 43, the memory 44, the position control circuit 45, the laser pulse control circuit 46, the motor control circuit 47, and the like are built in the signal processing LSI 4. However, the present invention is not limited to this configuration, and a part of them may be formed separately from the signal processing LSI 4.

  Furthermore, in the first embodiment, the microcomputer 43 executes data processing and various instructions by software control, but at least a part of them can also be executed by hardware control.

  In the first embodiment, the standard initial strategy is stored and held in advance in the memory 44. However, the recommended initial strategy recorded in the disc management information of the optical disc 1 can be used as the standard initial strategy.

  Furthermore, in the first embodiment, the jitter amount is used as a signal quality index in coarse adjustment and fine adjustment. However, the present invention is not limited to this, and an error rate or a shift value can be used as a signal quality index, and an index indicating the reproduction signal quality and an index indicating the edge shift amount can be used. In the case of a shift value, a shift value whose absolute value is close to “0” has good signal quality. Therefore, the same effect can be obtained by appropriately changing the evaluation function or the like.

  In the first embodiment, the data to be recorded on the optical disc 1 is random data as evaluation data. However, the present invention is not limited to this, and all combinations of mark length and space length can be recorded. Data patterns can be used.

  In the first embodiment, the readjustment determination in step F08 is executed to determine whether to perform coarse readjustment or fine readjustment. However, only one of the adjustments can be executed.

  In the first embodiment, the number of adjustments Nadj is reset to “1” in the process of step F01, incremented by “1” in the process of step F07, and the number of adjustments Nadj and the number of adjustments Nadjmax in the process of step F06. Are compared. However, the present invention is not limited to this, the number of adjustments Nadj is reset to the maximum number of adjustments Nadjmax in the process of step F01, the count is decreased by “1” in the process of step F07, and the process of step F06 is performed. The number of adjustments Nadj is compared with “1”, and when the number of adjustments Nadj is “1”, the recording strategy adjustment is terminated abnormally. If the number of adjustments counter Nadj is “2” or more, “1” is set in Step F07. "Countdown can also be performed, and means for limiting the number of adjustments to a finite number can be used.

  In the first embodiment, the coarse adjustment counter Neval is reset to “1” in the process of step F0201, incremented by “1” in the process of step F0207, and the coarse adjustment counter Neval in the process of step F0205. The maximum number of adjustments Nevalmax is compared. However, the present invention is not limited to this, and the coarse adjustment counter Neval is reset to the coarse adjustment count maximum value Nevalmax in the process of step F0201, and the process is incremented by "1" in the process of step F0207. The coarse adjustment counter Neval and “1” are compared in the process of step 1. When the coarse adjustment counter Neval becomes “1”, the adjustment start strategy selection is executed in the process of step F0206, and Neval is “2” or more. For example, “1” can be counted down in the process of step F0207, and means for limiting the number of adjustments to a finite number can be used.

  Further, in the first embodiment, the recording number counter Nrec is reset to “1” in the process of step F020401, is incremented by “1” in the process of step F020401, and is recorded with the recording number counter Nrec in the process of step F020406. The reproduction number Nrpmax is compared. However, the present invention is not limited to this, the recording number counter Nrec is reset to the maximum recording / reproducing number Nrpmax in the process of step F020401, the count is decreased by “1” in the process of step F020204, and the process of step F020406 is performed. The recording number counter Nrec is compared with “1”. When the recording number counter Nrec becomes “1”, the process proceeds to the next step F020407. If the recording number counter Nrec is “2” or more, the process proceeds to step F02041. “1” can be counted down by the processing, and means for limiting the number of recordings to a finite number can be used.

  Further, in the first embodiment, the reproduction number counter Nplay is reset to “1” in the process of step F020401, is incremented by “1” in the process of step F020413, and is increased to the maximum number of reproductions counter Nplay in the process of step F020410. This is to compare the recording / reproduction number Nrpmax. However, the present invention is not limited to this, the playback number counter Nplay is reset to the maximum recording / playback number Nrpmax in step F020401, the count is decreased by “1” in the process of step F020413, and the playback number counter is processed in the process of step F020410. Nplay is compared with “1”, and when the reproduction number counter Nplay becomes “1”, the process proceeds to the next step F020411. If the reproduction number counter Nplay is “2” or more, the process at step F020413 is performed. It is possible to count down by 1 ″ and use means for limiting the number of reproductions to a finite number.

  In the process of step F02 of FIG. 3 in the re-rough adjustment of the first embodiment, when calculating a plurality of initial strategies in the process of step F0203, the front edge shift amount Th or the rear edge shift amount Tt is constant only for a certain mark. An initial strategy that is added to the standard initial strategy by the amount (including the case of a negative number) is calculated, and the processing of Step F0204 to Step F0207 is executed for those initial strategies, and the initial strategy with the best signal quality at that mark is calculated. The shift amounts Th and Tt can be acquired, and the shift amounts Th and Tt of the initial strategy with the best signal quality can be acquired for other marks as well. In that case, the mark is adjusted using the values of the initial strategy shift amounts Th and Tt with good signal quality, while the previously obtained mark is obtained when other marks are adjusted later. Adjustment is performed using the values of the shift amounts Th and Tt.

  In the second embodiment, the AFE 41, the signal quality measurement circuit 42, the microcomputer 43, the memory 44, the position control circuit 45, the laser pulse control circuit 46, the motor control circuit 47, and the interface circuit 48 are built in the signal processing LSI 4. . However, the present invention is not limited to this configuration, and a part of them may be formed separately from the signal processing LSI 4.

  Further, in the second embodiment, the microcomputer 43 executes data processing and various instructions by software control, but at least a part of them can also be executed by hardware control.

  In the second embodiment, the standard initial strategy is stored and held in the memory of the host PC 5 in advance, but the recommended strategy recorded in the disc management information of the optical disc 1 can also be the standard initial strategy.

  Furthermore, in the second embodiment, a jitter amount is used as a signal quality index in coarse adjustment and fine adjustment. However, the present invention is not limited to this, and an error rate or a shift value can be used as a signal quality index, and an index indicating the reproduction signal quality and an index indicating the edge shift amount can be used. In the case of a shift value, a shift value whose absolute value is close to “0” has good signal quality. Therefore, the same effect can be obtained by appropriately changing the evaluation function or the like.

  In the second embodiment, the data to be recorded on the optical disc 1 is random data as evaluation data. However, the present invention is not limited to this, and all combinations of mark length and space length can be recorded. Data patterns can be used.

  In the second embodiment, the readjustment determination in step F08 is executed to determine whether to perform the coarse adjustment or the fine readjustment. However, only one of the adjustments can be executed.

  In the second embodiment, the number of adjustments Nadj is reset to “1” in the process of step F01, incremented by “1” in the process of step F07, and the number of adjustments Nadj and the number of adjustments Nadjmax in the process of step F06. Are compared. However, the present invention is not limited to this, the number of adjustments Nadj is reset to the maximum number of adjustments Nadjmax in the process of step F01, the count is decreased by “1” in the process of step F07, and the process of step F06 is performed. The number of adjustments Nadj is compared with “1”, and when the number of adjustments Nadj is “1”, the recording strategy adjustment is terminated abnormally. If the number of adjustments counter Nadj is “2” or more, “1” is set in Step F07. "Countdown can also be performed, and means for limiting the number of adjustments to a finite number can be used.

  In the second embodiment, the coarse adjustment counter Neval is reset to “1” in the process of step F0201, incremented by “1” in the process of step F0207, and the coarse adjustment counter Neval in the process of step F0205. The maximum number of adjustments Nevalmax is compared. However, the present invention is not limited to this, and the coarse adjustment counter Neval is reset to the coarse adjustment count maximum value Nevalmax in the process of step F0201, and the process is incremented by "1" in the process of step F0207. The coarse adjustment counter Neval and “1” are compared in the process of step 1. When the coarse adjustment counter Neval becomes “1”, the adjustment start strategy selection is executed in the process of step F0206, and Neval is “2” or more. For example, “1” can be counted down in the process of step F0207, and means for limiting the number of adjustments to a finite number can be used.

  In the second embodiment, the recording number counter Nrec is reset to “1” in the process of step F020421, incremented by “1” in the process of step F020431, and the recording number counter Nrec and the maximum recording are processed in the process of step F020430. The reproduction number Nrpmax is compared. However, the present invention is not limited to this, the recording number counter Nrec is reset to the maximum recording / reproducing number Nrpmax in the process of step F020421, the count is decreased by “1” in the process of step F020431, and the process of step F020430 is performed. The recording number counter Nrec is compared with “1”, and when the recording number counter Nrec becomes “1”, the process proceeds to the next step F020432, and when the recording number counter Nrec is “2” or more, the process proceeds to step F020431. “1” can be counted down by the processing, and means for limiting the number of recordings to a finite number can be used.

  In the second embodiment, the processing operation flow of the host PC 5 is the operation flow of software that operates the host PC 5. However, the present invention is not limited to the operation control by this software, and part or all of the processing operations can be controlled by hardware.

  In the process of step F02 of FIG. 3 in the second rough adjustment of the second embodiment, when calculating a plurality of initial strategies in the process of step F0203, the front edge shift amount Th or the rear edge shift amount Tt is constant only for a certain mark. An initial strategy that is added to the standard initial strategy by the amount (including the case of a negative number) is calculated, and the processing of step F0204 to step F0207 is executed for those initial strategies, and the initial strategy with the best signal quality at that mark is obtained. The shift amounts Th and Tt can be acquired, and the shift amounts Th and Tt of the initial strategy with the best signal quality can be acquired for other marks as well. In that case, the mark is adjusted using the values of the initial strategy shift amounts Th and Tt with good signal quality, while the previously obtained mark is obtained when other marks are adjusted later. Adjustment is performed using the values of the shift amounts Th and Tt.

DESCRIPTION OF SYMBOLS 1 ... Optical disk 2 ... Spindle motor 3 ... Optical pick-up 4 ... Signal processing LSI
41 ... AFE
42 ... Signal quality measurement circuit 43 ... Microcomputer 44 ... Memory 45 ... Position control circuit 46 ... Laser pulse control circuit 47 ... Motor control circuit 48 ... Interface circuit 5 ... Host PC
S01 ... Motor control signal S02 ... Position control signal S03 ... Racer pulse control signal S04 ... Electric signal S05 ... Analog signal S06 ... Measurement result information S07 ... Position control instruction S08 ... Laser pulse control instruction S09 ... Motor control instruction S10 ... Communication path

Claims (32)

A semiconductor integrated circuit comprising a motor control circuit, a laser control circuit, a pickup position control circuit, a signal detection circuit, a control unit, and a memory, and can be mounted on an optical disc apparatus,
The motor control circuit is capable of supplying a motor control signal to a motor that rotationally drives an optical disc mounted on the optical disc device in response to a motor control instruction from the control unit,
In response to a laser control instruction from the control unit, the laser control circuit is capable of supplying a laser control signal to a pickup that irradiates the surface of the optical disc with laser light for data recording.
The pickup position control circuit is capable of supplying a position control signal for moving the pickup in the radial direction of the optical disc to the pickup in response to a position control instruction from the control unit,
The signal detection circuit is configured to be able to supply measurement information in response to a read signal of data reproduction from the pickup that receives reflected light from the surface of the optical disc to the control unit,
The memory is capable of storing information for the control unit;
The control unit is capable of calculating a plurality of initial strategies from one standard initial strategy, and the recording laser power of the laser light during the data recording is changed according to the plurality of initial strategies to the optical disc. It is possible to record multiple evaluation data,
With respect to the plurality of evaluation data reproduced from the optical disc by the signal detection circuit, the control unit can perform signal quality evaluation,
The control unit can select one of the plurality of initial strategies as an adjustment start strategy based on the result of the evaluation of the signal quality,
The semiconductor integrated circuit according to claim 1, wherein the control unit determines an optimum recording strategy to be used for actual recording on the optical disc based on the adjustment start strategy.   The semiconductor integrated circuit according to claim 1, wherein the optimum recording strategy is the adjustment start strategy itself. According to the adjustment start strategy, it is possible to record and evaluate other evaluation data by changing the shift amount of the leading edge or trailing edge of the mark recorded on the optical disc,
2. The semiconductor integrated circuit according to claim 1, wherein the control unit determines the optimum recording strategy based on the recording of the other evaluation data and the evaluation.   The control unit performs addition or subtraction of a predetermined amount to the shift amount of the leading edge or trailing edge of the mark recorded on the optical disc according to the one standard initial strategy, and the control unit performs the one standard initial strategy. The semiconductor integrated circuit according to claim 1, wherein the plurality of initial strategies are calculated from   2. The semiconductor integrated circuit according to claim 1, wherein the control unit calculates the one standard initial strategy by using a recommended strategy recorded in disk management information of the optical disk.   The semiconductor integrated circuit is a system-in-package or multichip in which each semiconductor chip of the motor control circuit, the laser control circuit, the pickup position control circuit, the signal detection circuit, the control unit, and the memory is built in a package. 2. The semiconductor integrated circuit according to claim 1, wherein the semiconductor integrated circuit is configured in a module form.   The signal detection circuit is capable of reading data from a plurality of standard optical discs, whereby the optical disc device on which the semiconductor integrated circuit is mounted can be configured as a multi-drive type optical disc device. A semiconductor integrated circuit according to claim 1.   The control unit is a microcontroller that controls operations of the motor control circuit, the laser control circuit, the pickup position control circuit, and the signal detection circuit by software stored in the memory. The semiconductor integrated circuit according to claim 7. A method of operating a semiconductor integrated circuit, which includes a motor control circuit, a laser control circuit, a pickup position control circuit, a signal detection circuit, a control unit, and a memory, and can be mounted on an optical disc device,
The motor control circuit is capable of supplying a motor control signal to a motor that rotationally drives an optical disc mounted on the optical disc device in response to a motor control instruction from the control unit,
In response to a laser control instruction from the control unit, the laser control circuit is capable of supplying a laser control signal to a pickup that irradiates the surface of the optical disc with laser light for data recording.
The pickup position control circuit is capable of supplying a position control signal for moving the pickup in the radial direction of the optical disc to the pickup in response to a position control instruction from the control unit,
The signal detection circuit is configured to be able to supply measurement information in response to a read signal of data reproduction from the pickup that receives reflected light from the surface of the optical disc to the control unit,
The memory is capable of storing information for the control unit;
The control unit is capable of calculating a plurality of initial strategies from one standard initial strategy, and the recording laser power of the laser light during the data recording is changed according to the plurality of initial strategies to the optical disc. It is possible to record multiple evaluation data,
With respect to the plurality of evaluation data reproduced from the optical disc by the signal detection circuit, the control unit can perform signal quality evaluation,
The control unit can select one of the plurality of initial strategies as an adjustment start strategy based on the result of the evaluation of the signal quality,
The method for operating a semiconductor integrated circuit, wherein the control unit determines an optimum recording strategy to be used for actual recording on the optical disc based on the adjustment start strategy.   10. The method of operating a semiconductor integrated circuit according to claim 9, wherein the optimum recording strategy is the adjustment start strategy itself. According to the adjustment start strategy, it is possible to record and evaluate other evaluation data by changing the shift amount of the leading edge or trailing edge of the mark recorded on the optical disc,
10. The method of operating a semiconductor integrated circuit according to claim 9, wherein the control unit determines the optimum recording strategy based on the recording of the other evaluation data and the evaluation.   The control unit performs addition or subtraction of a predetermined amount to the shift amount of the leading edge or trailing edge of the mark recorded on the optical disc according to the one standard initial strategy, and the control unit performs the one standard initial strategy. The operation method of the semiconductor integrated circuit according to claim 9, wherein the plurality of initial strategies are calculated from the equation.   10. The method of operating a semiconductor integrated circuit according to claim 9, wherein the control unit calculates the one standard initial strategy using a recommended strategy recorded in disc management information of the optical disc.   The semiconductor integrated circuit is a system-in-package or multichip in which each semiconductor chip of the motor control circuit, the laser control circuit, the pickup position control circuit, the signal detection circuit, the control unit, and the memory is built in a package. 10. The semiconductor integrated circuit operating method according to claim 9, wherein the semiconductor integrated circuit is configured in a module form.   The signal detection circuit is capable of reading data from a plurality of standard optical discs, whereby the optical disc device on which the semiconductor integrated circuit is mounted can be configured as a multi-drive type optical disc device. A method of operating a semiconductor integrated circuit according to claim 9.   The control unit is a microcontroller that controls operations of the motor control circuit, the laser control circuit, the pickup position control circuit, and the signal detection circuit by software stored in the memory. The operation method of the semiconductor integrated circuit according to claim 15. An optical disc apparatus comprising a motor control circuit, a laser control circuit, a pickup position control circuit, a signal detection circuit, a control unit, and a memory,
The motor control circuit is capable of supplying a motor control signal to a motor that rotationally drives an optical disc mounted on the optical disc device in response to a motor control instruction from the control unit,
In response to a laser control instruction from the control unit, the laser control circuit is capable of supplying a laser control signal to a pickup that irradiates the surface of the optical disc with laser light for data recording.
The pickup position control circuit is capable of supplying a position control signal for moving the pickup in the radial direction of the optical disc to the pickup in response to a position control instruction from the control unit,
The signal detection circuit is configured to be able to supply measurement information in response to a read signal of data reproduction from the pickup that receives reflected light from the surface of the optical disc to the control unit,
The memory is capable of storing information for the control unit;
The control unit is capable of calculating a plurality of initial strategies from one standard initial strategy, and the recording laser power of the laser light during the data recording is changed according to the plurality of initial strategies to the optical disc. It is possible to record multiple evaluation data,
With respect to the plurality of evaluation data reproduced from the optical disc by the signal detection circuit, the control unit can perform signal quality evaluation,
The control unit can select one of the plurality of initial strategies as an adjustment start strategy based on the result of the evaluation of the signal quality,
The optical disc apparatus, wherein the control unit determines an optimum recording strategy to be used for actual recording on the optical disc based on the adjustment start strategy.   The optical disc apparatus according to claim 17, wherein the optimum recording strategy is the adjustment start strategy itself. According to the adjustment start strategy, it is possible to record and evaluate other evaluation data by changing the shift amount of the leading edge or trailing edge of the mark recorded on the optical disc,
18. The optical disc apparatus according to claim 17, wherein the control unit determines the optimum recording strategy based on the recording of the other evaluation data and the evaluation.   The control unit performs addition or subtraction of a predetermined amount to the shift amount of the leading edge or trailing edge of the mark recorded on the optical disc according to the one standard initial strategy, and the control unit performs the one standard initial strategy. The optical disk apparatus according to claim 17, wherein the plurality of initial strategies are calculated from the plurality of initial strategies.   18. The optical disc apparatus according to claim 17, wherein the control unit calculates the one standard initial strategy using a recommended strategy recorded in disc management information of the optical disc.   Each of the motor control circuit, the laser control circuit, the pickup position control circuit, the signal detection circuit, the control unit, and the memory semiconductor chip is configured in the form of a system-in-package or multichip module in which the semiconductor chip is built. The optical disk apparatus according to claim 17, wherein   18. The optical disc apparatus can be configured as a multi-drive optical disc apparatus by enabling the signal detection circuit to read data read from a plurality of standard optical discs. The optical disc device according to any one of 22.   The control unit is a microcontroller that controls operations of the motor control circuit, the laser control circuit, the pickup position control circuit, and the signal detection circuit by software stored in the memory. The optical disk apparatus according to claim 23. An operation method of an optical disc apparatus comprising a motor control circuit, a laser control circuit, a pickup position control circuit, a signal detection circuit, a control unit, and a memory,
The motor control circuit is capable of supplying a motor control signal to a motor that rotationally drives an optical disc mounted on the optical disc device in response to a motor control instruction from the control unit,
In response to a laser control instruction from the control unit, the laser control circuit is capable of supplying a laser control signal to a pickup that irradiates the surface of the optical disc with laser light for data recording.
The pickup position control circuit is capable of supplying a position control signal for moving the pickup in the radial direction of the optical disc to the pickup in response to a position control instruction from the control unit,
The signal detection circuit is configured to be able to supply measurement information in response to a read signal of data reproduction from the pickup that receives reflected light from the surface of the optical disc to the control unit,
The memory is capable of storing information for the control unit;
The control unit is capable of calculating a plurality of initial strategies from one standard initial strategy, and the recording laser power of the laser light during the data recording is changed according to the plurality of initial strategies to the optical disc. It is possible to record multiple evaluation data,
With respect to the plurality of evaluation data reproduced from the optical disc by the signal detection circuit, the control unit can perform signal quality evaluation,
The control unit can select one of the plurality of initial strategies as an adjustment start strategy based on the result of the evaluation of the signal quality,
The operation method of the optical disc apparatus, wherein the control unit determines an optimum recording strategy to be used for actual recording on the optical disc based on the adjustment start strategy.   26. The method of claim 25, wherein the optimum recording strategy is the adjustment start strategy itself. According to the adjustment start strategy, it is possible to record and evaluate other evaluation data by changing the shift amount of the leading edge or trailing edge of the mark recorded on the optical disc,
26. The operation method of the optical disc apparatus according to claim 25, wherein the control unit determines the optimum recording strategy based on the recording of the other evaluation data and the evaluation.   The control unit performs addition or subtraction of a predetermined amount to the shift amount of the leading edge or trailing edge of the mark recorded on the optical disc according to the one standard initial strategy, and the control unit performs the one standard initial strategy. 26. The operation method of the optical disc apparatus according to claim 25, wherein the plurality of initial strategies are calculated from the information.   26. The method according to claim 25, wherein the control unit calculates the one standard initial strategy using a recommended strategy recorded in disc management information of the optical disc.   Each of the motor control circuit, the laser control circuit, the pickup position control circuit, the signal detection circuit, the control unit, and the memory semiconductor chip is configured in the form of a system-in-package or multichip module in which the semiconductor chip is built. 26. A method of operating an optical disk device according to claim 25.   26. The optical disc apparatus can be configured as a multi-drive type optical disc apparatus by enabling the signal detection circuit to read data reproduction from a plurality of standard optical discs. 30. An operation method of the optical disc device according to any one of 30.   The control unit is a microcontroller that controls operations of the motor control circuit, the laser control circuit, the pickup position control circuit, and the signal detection circuit by software stored in the memory. 32. A method of operating an optical disc apparatus according to claim 31.

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