JP2007149290A - Optical disk device and method for recording/reproducing information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten time necessary for recording/reproducing information in a hybrid type optical disk having recording layers different in standard. <P>SOLUTION: Error information is learned during setting-up in a recording layer before the recording layer of a hybrid type optical disk 2 is switched or during recording or reproducing, and the result of the learning is saved. When the recording layer is switched, the learning result in the recording layer before the switching is applied to the recording layer after the switching. When there are flaws or stains equal to or more than a reference level, based on the learning result information, the rotation double speed value of the hybrid type optical disk is reduced during the setting-up or recording/reproducing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a technology for recording or reproducing information on a hybrid optical disc having a plurality of recording layers of different standards on the same recording surface side.

  For example, Japanese Patent Application Laid-Open No. 2004-152379 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2004-152379 are related to the present invention and are disclosed in Patent Documents as conventional techniques for dealing with scratches and dirt on the disk surface. There exists what was described in 2001-67883 gazette (patent documents 2). In Japanese Patent Application Laid-Open No. 2004-152379, in an information recording disk reproducing apparatus, in the case of a disk having an area that cannot be read unless it is decelerated due to scratches or dirt on the disk, the address where a reproduction error has occurred is targeted for deceleration. A technique is described in which the same layer of the disc is played back at a reduced speed. Japanese Laid-Open Patent Publication No. 2001-67783 discloses a reproduction error position in an optical disc apparatus in order to shorten the time required for correction by retry or the like when there is an error in read data due to scratches or deposits on the optical disc. Thus, a technique is described in which a deceleration position of an area in the same layer is predicted at the next reproduction.

JP 2004-152379 A JP 2001-67783 A

In recent years, blue laser optical discs have already been put into practical use. Furthermore, blue laser optical discs such as BD (Blu-ray Disc) and HD-DVD with different standards and red laser optical discs such as DVD and CD are integrated. The development of hybrid discs is also underway. In the hybrid disk, when the optical disk apparatus performs recording or reproduction, the disc type is discriminated, the eccentricity is measured, the eccentric center of gravity is determined for each of the blue laser recording layer and the red laser recording layer at the setup stage. It may be possible to perform measurement, correction of surface shake, etc., and at the recording or playback stage, discriminating or detecting the presence / absence of double speed value down of disk rotation, the cause of double speed value down, address where double speed value is down, etc. Depending on the method, it takes a long time for recording or reproduction including setup.
Both the technique described in the above Japanese Patent Application Laid-Open No. 2004-152379 and the technique described in Japanese Patent Application Laid-Open No. 2001-67883 simply reduce the reproduction speed within one same recording layer when the disk is scratched or dirty. Thus, it is a technique that enables information to be reproduced, and is not a technique for performing recording or reproduction by switching recording layers between recording layers having different standards.

In view of the state of the prior art, the problem of the present invention is that the optical disk apparatus is in a deceleration state within a short time after switching the recording layer even if there is a scratch or the like on the hybrid type optical disk having recording layers with different standards. It is possible to shorten the time required for recording or reproduction.
An object of the present invention is to solve such problems, and to provide an optical disc apparatus compatible with a hybrid type optical disc that is easy to use and has high reliability.

  In order to solve the above problems, in the present invention, in an optical disc apparatus, learning of error information at the time of setup in a recording layer and learning of error information at the time of recording or reproduction are performed before the recording layer of the hybrid type optical disc is switched. When the recording layer is switched, the learning result in the recording layer before switching is shared with the recording layer after switching, and scratches or dirt above the reference level are found. In some cases, the rotational double speed value of the hybrid type optical disc is reduced at the time of setup, recording or reproduction based on the learning result information.

  According to the present invention, it is possible to provide an optical disc apparatus that can be recorded or reproduced with good usability and high reliability.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1-5 is explanatory drawing of embodiment of this invention. FIG. 1 is a structural example diagram of an optical disc apparatus as an embodiment of the present invention, FIG. 2 is an operation explanatory diagram of the optical disc apparatus of FIG. 1, and FIG. 3 is an effect of using error information in the optical disc apparatus of FIG. FIG. 4 is an explanatory diagram of the relationship between error information during reproduction and recording layer switching in the optical disc apparatus of FIG. 1, and FIG. 5 is a diagram of error information and recording layer switching during recording in the optical disc apparatus of FIG. It is explanatory drawing of a relationship.

  In FIG. 1, 1 is an optical disk device as an embodiment of the present invention, and 2 is a hybrid having a blue laser recording layer and a red laser recording layer as a plurality of recording layers of different standards on the same recording surface side. 3 is a spindle motor that rotationally drives the hybrid optical disk 2, 4 is an optical pickup, 5 is an objective lens, 6 is a laser diode that generates laser light of a predetermined intensity for recording or reproduction, 7 Is a laser drive circuit for driving the laser diode 6, and 8 is a laser beam received from the recording surface of the hybrid optical disc 2 (hereinafter also referred to as the optical disc surface) via the objective lens 5 and converted into an electrical signal. An output light receiving unit 9 is an actuator that moves and displaces the objective lens 5 with respect to the optical disk surface and changes the posture of the objective lens 5. Reference numeral 0 denotes an actuator drive circuit for driving the actuator 9, and 11 denotes a linear guide member (not shown), a lead screw member (not shown), and the like. A movement / guide mechanism section 12 for moving in the direction, 12 is a slide motor in the movement / guide mechanism section 11 for rotationally driving a lead screw member (not shown), and 13 is for loading the hybrid type optical disk 2 into the apparatus main body. Alternatively, a loading mechanism unit 14 for unloading, a loading motor 14 in the loading mechanism unit 13 for moving and driving a tray (not shown) on which the hybrid optical disc 2 is placed, and a spindle motor 3 and a slide motor 12 are provided. Motor driving to drive the loading motor 14 A reference numeral 16 denotes a recording signal generation unit that generates a recording signal to be recorded on the recording layer of the hybrid optical disc 2, and 17 denotes a reproduction signal from the light receiving unit 8, an RF signal, a tracking error signal, and a focus error signal. A reproduction / error signal processing unit 18 for processing as described above, a focus / tracking control unit 18 for generating and outputting a focus control signal and a tracking control signal, and 20 for generating a servo signal to be supplied to the motor drive circuit 6, A signal for controlling the recording signal generation unit 16 is generated, a reproduction signal (RF signal) is demodulated based on a signal from the reproduction / error signal processing unit 17, and a focus / focus error signal is generated based on a tracking error signal or a focus error signal. As a control means for generating a control signal to be supplied to the tracking control unit 18 and controlling the level of the servo signal DSP (Digital Signal Processor), 30 is a microcomputer as a control means for controlling the DSP 20, 31 is a memory as a storage means for storing information processed by the microcomputer 30, and 40 is an interface for taking in a write request signal , 50 is a host computer that issues a write request by outputting a write request signal to the optical disk apparatus.

  In the above configuration, the laser diode 6 generates and emits blue laser light corresponding to the blue laser recording layer and the red laser recording layer constituting the recording surface of the hybrid optical disc 2. It consists of a laser diode and a red laser diode that generates and emits red laser light. When recording or reproducing information to or from the blue laser recording layer of the hybrid optical disc 2, blue laser light is emitted from the blue laser diode in the laser diode 6 and is recorded through the objective lens 5. When the layer is irradiated and information is recorded on or reproduced from the red laser recording layer, red laser light is emitted from the red laser diode in the laser diode 6, and the red laser light is transmitted through the objective lens 5. Irradiate the recording layer. Switching between the blue laser diode and the red laser diode is performed in response to the laser drive circuit 7 switching between the blue laser recording layer and the red laser recording layer. Switching between the blue laser recording layer and the red laser recording layer, that is, the recording or reproducing operation for the red laser recording layer is changed from the state in which the recording or reproducing operation is performed on the blue laser recording layer. Switching to a state in which recording or reproducing operation is performed on a blue laser recording layer by switching from a state in which recording or reproducing operation is performed on a red laser recording layer to a state in which recording or reproducing operation is performed on a blue laser recording layer is a control means. The microcomputer 30 controls the DSP 20 as control means. The DSP 20 receives a command from the microcomputer 30 and controls the motor drive circuit 15, the recording signal generation unit 16, the laser drive circuit 7, the focus / tracking control unit 18, and the like, and the rotation speed of the hybrid optical disc 2 and the laser diode 6. In addition, the intensity of the laser light, the position of the objective lens 5 and the like are set in a state corresponding to the blue laser recording layer or the red laser recording layer. Further, the microcomputer 30 and the DSP 20 as control means deteriorate the recording or state such as scratches and dirt on the recording surface of the hybrid optical disc 2 (one or both of the blue laser recording layer and the red laser recording layer). If there is a factor that exceeds the reference value, the motor drive circuit 15 is controlled to reduce (down) the rotational speed (double speed) of the hybrid optical disc 2 in order to ensure recording or reproduction performance. The rotation speed of the spindle motor 3 is reduced so that the rotation speed is decreased (= double speed value is decreased).

  In addition to the above control, the microcomputer 30 learns the setup information at the time of setup in the recording layer before the recording layer of the hybrid optical disc 2 is switched, that is, the type discrimination result of the hybrid optical disc 2, the measurement result of the eccentricity, the eccentric gravity center Measurement results, same-surface shake correction results, adjustment results of apparatus parts other than the hybrid type optical disc 2, for example, the level adjustment result of the recording signal output from the recording signal generation unit 16 and the reproduction / error signal processing unit 17 Part or all of the output signal level adjustment results. Further, the microcomputer 30 learns error information at the time of recording or reproduction on the recording layer before switching, that is, whether there is a double speed value down at the time of recording or reproduction, a factor of the double speed value down at the time of recording or reproduction, and at the time of recording or reproduction A part or all of the address that has been doubled down is learned. The microcomputer 30 stores these learning results in a memory 31 as a storage means. Thereafter, when the recording layer of the hybrid type optical disc 2 is switched, the microcomputer 30 uses the information of the learning result in the recording layer before the switching also in the recording layer after the switching to perform the setup operation and the recording or reproducing operation. Let it be done. When the information obtained by reducing the double speed value of the rotation of the hybrid optical disc 2 is stored in the memory 31 as the learning result information, the microcomputer 30 controls the motor drive circuit 15 to control the rotation speed of the spindle motor 3. By lowering, the rotational speed of the hybrid optical disc 2 is reduced.

FIG. 2 is an explanatory diagram of the operation of the optical disc apparatus 1 of FIG.
In FIG.
(1) When a recording or reproduction instruction is issued with the hybrid optical disk 2 mounted on the optical disk apparatus 1, the microcomputer 30 starts the operation of the optical disk apparatus 1 (step S201).
(2) The microcomputer 30 learns error information during setup in the recording layer before the recording layer of the hybrid optical disc 2 is switched (step S202). The error information is a part or all of the information on the type discrimination result of the hybrid type optical disc 2, the information on the measurement result of the eccentricity, the information on the measurement result of the eccentric center of gravity, and the information on the correction result of the surface shake.
(3) Further, the microcomputer 30 learns information on the adjustment result of the apparatus part other than the hybrid optical disc 2 as error information at the time of setup in the recording layer before the recording layer of the hybrid optical disc 2 is switched. (Step S203).
(4) The microcomputer 30 determines whether or not the double speed value of the hybrid optical disc 2 has been reduced during setup (step S204).
(5) If the result of determination in step S204 is that the double speed value has been reduced, the microcomputer 30 stores the error information learned in step S202 and step S203 in the memory 31 (step S205). This completes the setup operation.

(6) Next, the microcomputer 30 causes the optical disc apparatus 1 to start reproduction or recording operation on the recording layer before switching (step S206). As a result of the determination in step S204, the microcomputer 30 also causes the optical disc apparatus 1 to start the reproduction or recording operation even when the double speed value of the hybrid optical disc 2 is not lowered.
(7) The microcomputer 30 determines whether or not the double speed value of the hybrid optical disc 2 has been lowered during the reproduction or recording operation (step S207).
(8) If the result of determination in step S207 is that the double speed value of the hybrid optical disc 2 is down, the microcomputer 30 learns error information related to the double speed value down (step S208). As error information, the presence or absence of double speed value down during reproduction or recording, the cause of double speed value down during reproduction or recording, and part or all of the address where the double speed value was down during reproduction or recording are learned.
(9) The microcomputer 30 stores the error information learned in step S208 in the memory 31 (step S209). This completes the reproduction or recording operation on the recording layer before switching.
(10) Next, the microcomputer 30 instructs the optical disc apparatus 1 to switch the recording layer of the hybrid optical disc 2, and then determines whether or not the recording layer has been switched (step S210). As a result of the determination in step S207, even if the double speed value of the hybrid optical disc 2 has not been reduced, the microcomputer 30 determines whether or not the recording layer has been switched.

(11) If the result of determination in step S210 is that the recording layer of the hybrid optical disc 2 has been switched, the microcomputer 30 reduces the double speed value in the recording layer before the switching of the hybrid optical disc 2. It is determined whether or not (step S211).
(12) If, as a result of the determination in step S211, the hybrid type optical disc 2 has undergone the double speed value reduction in the recording layer before switching, the microcomputer 30 performs the recording in the recording layer after switching of the hybrid type optical disc 2. Information on the adjustment results of the apparatus parts other than the hybrid optical disc 2 is learned as error information (step S212).
(13) Next, the microcomputer 30 reduces the double speed value of the hybrid type optical disc 2, and performs reproduction or recording on the recording layer after the switching (step S213).
(14) Thereafter, the microcomputer 30 ends the reproduction or recording of the optical disc apparatus 1 (step S216).
(15) If the result of determination in step S211 is that the hybrid optical disc 2 has not been subjected to double speed value reduction in the recording layer before switching, the microcomputer 30 performs the recording in the recording layer after switching of the hybrid optical disc 2. Measurement and adjustment of errors (eccentricity, eccentric gravity center, surface runout, etc.) at the time of setup of the hybrid type optical disc 2 and learning of information on the result are performed (step S214), and then the recording layer after switching to the optical disc apparatus 1 is performed. Reproduction or recording is performed (step S215), and then the reproduction or recording operation is terminated (step S216).

FIG. 3 is an explanatory diagram of the effect when the error information is learned and used in the optical disc apparatus 1 of FIG.
In FIG.
(A) When the error information is error information on transfer with the host computer 50 As an error on transfer with the host computer 50, for example, there is an error such as slow writing. When the optical disc device 1 is used as learning information, there is no effect of shortening the setup operation time. However, reading and writing of information is ensured by reducing the double speed value of the rotation of the hybrid optical disc 2, so that reading during reproduction is performed. The effect of reducing errors and writing errors during recording can be obtained.

(B) When the error information is temperature information in the optical disc apparatus 1 When the optical disc apparatus 1 uses the temperature information as learning information, there is no effect of shortening the setup operation time. When the ambient temperature rises above the reference value, playback and recording at a high speed become unstable, so recording performance and playback performance can be ensured by reducing the rotation speed of the hybrid optical disc 2. To. For this reason, the effect of reducing the reading error during reproduction and the writing error during recording can be obtained.

(C) When the error information is eccentricity information of the hybrid type optical disc 2 In the optical disc apparatus 1, the eccentricity of the hybrid type optical disc 2 is learned by measuring and adjusting at the time of setup in the recording layer before switching, and learning result information Is used in the subsequent setup of the switched recording layer, the setup operation time in the switched recording layer can be shortened. Further, when the double speed value of the hybrid optical disc 2 is reduced based on the eccentricity information as the learning result information, reading and writing of information is ensured, so that a reading error during reproduction and a writing error during recording are ensured. Can be reduced.

(D) When the error information is the eccentric gravity center information of the hybrid optical disc 2 In the optical disc apparatus 1, the eccentric gravity center of the hybrid optical disc 2 is measured and adjusted at the time of setup in the recording layer before switching and learned. By using the result information at the time of subsequent setup on the switched recording layer, the measurement and adjustment of the eccentric center of gravity can be made unnecessary, and as a result, the setup operation time on the switched recording layer can be shortened. Can do. In addition, when the double-speed value of the hybrid optical disc 2 is reduced based on the eccentric gravity center information as the learning result information, reading and writing of information is ensured, so reading errors during reproduction and writing during recording Errors can be reduced.

(E) When the error information is the surface shake information of the hybrid type optical disc 2 In the optical disc apparatus 1, the surface shake of the hybrid type optical disc 2 is measured and corrected at the time of setup in the recording layer before switching, and learning is performed. By using the result information at the time of setup in the recording layer that has been switched thereafter, the measurement and correction of the surface shake can be made unnecessary, and as a result, the setup operation time in the switched recording layer can be shortened. Can do. Further, when the double speed value of the hybrid optical disc 2 is reduced based on the surface shake information as the learning result information, reading and writing of information is ensured, so that a reading error during reproduction and a writing during recording are ensured. Errors can be reduced.

(F) When the error information is flaw information on the hybrid type optical disc 2 In the optical disc apparatus 1, the flaw information on the hybrid type optical disc 2 is not used during setup. For this reason, the flaw information does not contribute to shortening the setup time. However, when the optical disc apparatus 1 learns the flaw information as error information at the time of recording or reproduction on the recording layer before switching, and if the double speed value of the hybrid optical disc 2 is reduced based on the learned information, the information is read. Since writing is ensured, reading errors during reproduction and writing errors during recording can be reduced.

(G) When the error information is deviation information of the hybrid type optical disc 2 As in the case of (f) above, in the optical disc apparatus 1, deviation information such as the deviation of the recording film of the hybrid type optical disc 2 and the track distortion is not set up at the time of setup. do not use. For this reason, the deviation information does not contribute to shortening the setup time. However, in the optical disc apparatus 1, when the deviation information is learned as error information at the time of recording or reproduction on the recording layer before switching, and when the double speed value of the hybrid optical disc 2 is reduced based on the learned information, the information is read. Since writing is ensured, reading errors during reproduction and writing errors during recording can be reduced.

FIG. 4 is an explanatory diagram of the relationship between error information during playback and recording layer switching in the optical disc apparatus 1 of FIG.
In FIG. 4, (a) switches the recording layer of the hybrid type optical disc 2 from the recording layer for red laser used for DVD and CD, for example, to the recording layer for blue laser used for BD, for example. In the case (b), the recording layer of the hybrid optical disc 2 is switched from the blue laser recording layer used in, for example, BD to the red laser recording layer used in, for example, DVD and CD. is there.

In FIG.
(A) When the error information is error information for transfer with the host computer 50 In the optical disc apparatus 1, during the playback, the transfer with the host computer 50 is performed in both cases (a) and (b). The above error information is not used for the double speed control of the hybrid optical disc 2. For this reason, the double speed value of the rotation of the hybrid optical disc 2 based on the error information is not reduced.

(B) When the error information is temperature information in the optical disk device 1 In the optical disk device 1, during reproduction, temperature information such as the temperature of the laser diode and its surroundings is a hybrid type in both cases (a) and (b). It is not used for double speed control of the optical disc 2. For this reason, the double speed value of the rotation of the hybrid optical disc 2 based on the error information is not reduced.

(C) When the error information is eccentricity information of the hybrid type optical disc 2 In the optical disc apparatus 1, at the time of reproduction, the eccentricity of the hybrid type optical disc 2 is detected in the recording layer before switching in both cases (a) and (b). Measurement and adjustment are performed at the time of setup, and the learning result information is used at the time of setup on the recording layer after switching. Further, the double speed value of the hybrid optical disc 2 is reduced based on the eccentricity information as the learning result information.

(D) When the error information is the eccentric gravity center information of the hybrid optical disc 2 In the optical disc apparatus 1, during reproduction, the eccentric gravity center of the hybrid optical disc 2 is recorded before switching in both cases (a) and (b). Learning is performed by measuring and adjusting at the time of setup in the layer, and the learning result information is used at the time of setup in the subsequent recording layer. Further, the double speed value of the hybrid optical disc 2 is reduced based on the eccentric gravity center information as the learning result information.

(E) When the error information is the surface shake information of the hybrid type optical disc 2 In the optical disc apparatus 1, during playback, the surface shake of the hybrid type optical disc 2 is recorded before switching in both cases (a) and (b). Learning is performed by measuring and correcting at the time of setup in the layer, and the learning result information is used at the time of setup in the recording layer that is switched thereafter. Further, the double speed value of the hybrid optical disc 2 is reduced based on the surface shake information as the learning result information.

(F) When the error information is flaw information of the hybrid type optical disc 2 In the optical disc apparatus 1, during reproduction, in the cases (a) and (b), the flaw information is error information in the recording layer before switching. And the double speed value of the hybrid optical disc 2 is reduced based on the learning information.

(G) When the error information is deviation information of the hybrid type optical disc 2 As in the case of (f) above, in the optical disc apparatus 1, the hybrid type optical disc 2 is reproduced in both cases (a) and (b) during reproduction. Deviation information such as deviation of the recording film and track distortion is learned as error information in the recording layer before switching, and the double speed value of the hybrid optical disc 2 is reduced based on the learned information.

FIG. 5 is an explanatory diagram of the relationship between error information during recording and recording layer switching in the optical disc apparatus 1 of FIG.
In FIG. 5, (a) switches the recording layer of the hybrid type optical disc 2 from the recording layer for red laser used in, for example, DVD and CD to the recording layer for blue laser used in, for example, BD. In the case (b), the recording layer of the hybrid optical disc 2 is switched from the blue laser recording layer used in, for example, BD to the red laser recording layer used in, for example, DVD and CD. is there.

In FIG.
(A) When error information is error information for transfer to / from the host computer 50 In the optical disc apparatus 1, during recording, transfer to / from the host computer 50 is possible in both cases (a) and (b). The above error information is used for the double speed control of the hybrid optical disk 2. For example, when writing becomes slow, the double speed value of the rotation of the hybrid optical disk 2 is decreased.

(B) When the error information is temperature information in the optical disc apparatus 1 In the optical disc apparatus 1, the temperature information such as the laser diode and its surrounding temperature is a hybrid type in both cases of recording and (b) and (b). It is not used for double speed control of the optical disc 2. For this reason, the double speed value of the rotation of the hybrid optical disc 2 based on the error information is not reduced.

(C) When the error information is eccentricity information of the hybrid type optical disc 2 In the optical disc apparatus 1, at the time of recording, the eccentricity information of the hybrid type optical disc 2 is the double speed of the hybrid type optical disc 2 in both cases (a) and (b). Not used for control. For this reason, the double speed value of the rotation of the hybrid optical disc 2 based on the error information is not reduced.

(D) When the error information is the eccentric gravity center information of the hybrid optical disc 2 In the optical disc apparatus 1, during recording, the eccentric gravity center information of the hybrid optical disc 2 is the hybrid optical disc 2 in both cases (a) and (b). Not used for double speed control. For this reason, the double speed value of the rotation of the hybrid optical disc 2 based on the error information is not reduced.

(E) When the error information is the surface shake information of the hybrid type optical disc 2 In the optical disc apparatus 1, the surface shake of the hybrid type optical disc 2 is recorded before switching in both cases (i) and (b). Learning is performed by measuring and correcting at the time of setup in the layer, and the learning result information is used at the time of setup in the recording layer that is switched thereafter. Further, the double speed value of the hybrid optical disc 2 is reduced based on the surface shake information as the learning result information.

(F) When the error information is flaw information of the hybrid type optical disc 2 In the optical disc apparatus 1, at the time of recording, in the case of (b), the flaw information is learned as error information in the recording layer before switching, Based on the learning information, the double speed value of the hybrid optical disc 2 is reduced. In the case of (b), the flaw information of the hybrid type optical disc 2 is not used for the double speed control of the hybrid type optical disc 2. For this reason, the double speed value of the rotation of the hybrid optical disc 2 based on the error information is not reduced.

(G) When the error information is deviation information of the hybrid type optical disc 2 As in the case of (f) above, in the optical disc apparatus 1, the hybrid type optical disc 2 is recorded both in the case of (A) and (B). Deviation information such as deviation of the recording film and track distortion is learned as error information in the recording layer before switching, and the double speed value of the hybrid optical disc 2 is reduced based on the learned information.

  According to the above-described embodiment of the present invention, even when the hybrid optical disc 2 has scratches or the like in the optical disc apparatus 1, the time required for recording or reproduction is shortened in a short time after switching the recording layer. It becomes possible to do. For this reason, usability can be improved. In addition, since the rotation control of the hybrid type optical disc 2 based on the learning result information is performed and the double speed value of the hybrid type optical disc 2 is lowered to ensure reading and writing of information, highly reliable recording or reproduction is possible. An optical disc device can be provided.

  In the above-described embodiment, the DSP 20 and the microcomputer 30 are used as the control means. However, the present invention is not limited to this, and the control means may be composed of, for example, only a microcomputer or a microcomputer. It may be configured by a DSP that includes or has a microcomputer function. Further, a memory for storing the learning result of the error information may be provided inside the DSP 20 or the microcomputer 30.

1 is a configuration example diagram of an optical disc apparatus as an embodiment of the present invention. FIG. 2 is an operation explanatory diagram of the optical disc apparatus of FIG. 1. It is explanatory drawing of the effect at the time of error information use in the optical disk device of FIG. FIG. 2 is an explanatory diagram of a relationship between error information during reproduction and recording layer switching in the optical disc apparatus of FIG. 1. FIG. 2 is an explanatory diagram of a relationship between error information during recording and recording layer switching in the optical disc apparatus of FIG. 1.

Explanation of symbols

1 ... Optical disk device,
2 ... Hybrid type optical disc,
3 ... Spindle motor,
4 ... Optical pickup,
5 ... Objective lens,
6 ... Laser diode,
7 ... Laser drive circuit,
8: Light receiving part,
9 ... Actuator,
10 ... Actuator drive circuit,
11 ... movement / guide mechanism,
12 ... Slide motor,
13 ... Loading mechanism section,
14 ... loading motor,
15 ... Motor drive circuit,
16: Recording signal generation unit,
17: Reproduction / error signal processing unit,
18: Focus / tracking control unit,
20 ... DSP,
30 ... Microcomputer,
31 ... Memory,
40 ... interface,
50: Host computer.

Claims (6)

An optical disc apparatus capable of recording or reproducing information with respect to a hybrid type optical disc having a plurality of recording layers of different standards on the same recording surface side,
A spindle motor that rotationally drives the hybrid optical disc;
A motor drive circuit for driving the spindle motor;
A plurality of laser diodes that generate and emit laser light corresponding to a plurality of recording layers of the different standards;
A laser driving circuit for driving the laser diode;
Control means for performing control of the motor drive circuit, control of the laser drive circuit, learning of error information in the recording layer before the recording layer of the hybrid optical disc is switched, and
Storage means for storing the learning results;
When the recording layer of the hybrid type optical disc is switched, the control means also shares the learning result in the recording layer before the switching to the recording layer after switching, based on the learning result information, An optical disc apparatus configured to control the motor drive circuit to reduce the rotation speed of the spindle motor and to reduce the rotation speed of the optical disc.   The control means includes at least the type discriminating result information of the hybrid type optical disc, the measurement result information of the eccentricity of the optical disc, the measurement result information of the eccentric center of gravity, and the same surface shake as error information at the time of setup in the recording layer before switching. Correction result information, and adjustment result information of a portion other than the hybrid type optical disc, and error information at the time of recording or reproduction on the recording layer before switching is at least a double speed value down value at the time of recording or reproduction. 2. The optical disc apparatus according to claim 1, wherein the optical disc apparatus is configured to learn one of presence / absence, a factor of a double speed value decrease during recording or reproduction, and an address at which the double speed value is decreased during recording or reproduction.   2. The optical disc apparatus according to claim 1, wherein the hybrid type optical disc includes a red laser recording layer and a blue laser recording layer, and is switched between the recording layers. A method for recording or reproducing information with respect to a hybrid optical disc having a plurality of recording layers of different standards on the same recording surface side,
When recording or reproducing information to or from the second recording layer of a hybrid type optical disc that already has a history of setup, recording or reproduction in the first recording layer,
A first step of performing setup in the second recording layer using error information learned during setup in the first recording layer;
A second step of recording or reproducing information on the second recording layer using error information learned at the time of recording or reproducing on the first recording layer;
A method for recording or reproducing information, comprising: A method for recording or reproducing information with respect to a hybrid optical disc having a plurality of recording layers of different standards on the same recording surface side,
First set up the first recording layer of the hybrid type optical disc to learn error information of the hybrid type optical disc, learn error information of portions other than the hybrid type optical disc, and store the learning result Steps,
A second step of recording or reproducing information with respect to the first recording layer of the hybrid optical disc, learning error information of the hybrid optical disc, and storing the learning result;
A third step of switching the first recording layer of the hybrid optical disc to the second recording layer;
A fourth step for setting up the second recording layer using the error information stored in the first step;
A fifth step of recording or reproducing information on the second recording layer using the error information stored in the second step;
A method for recording or reproducing information, comprising:   In the first step, as the error information, at least the type determination result information of the hybrid type optical disc, the measurement result information of the eccentricity of the optical disc, the measurement result information of the eccentric centroid, the correction result information of the same surface shake, the hybrid One of the adjustment result information of parts other than the type optical disc is learned, and in the second step, as the error information, at least whether there is a double speed value down during recording or reproduction, double speed value down during recording or reproduction, 6. The information recording or reproducing method according to claim 5, wherein any one of the factor and the address at which the double speed value is reduced during recording or reproduction is learned.

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