WO2007017936A1 - Dispositif d’enregistrement/reproduction de disque d’informations et son procédé de contrôle de la vitesse d’enregistrement /reproduction - Google Patents

Dispositif d’enregistrement/reproduction de disque d’informations et son procédé de contrôle de la vitesse d’enregistrement /reproduction Download PDF

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Publication number
WO2007017936A1
WO2007017936A1 PCT/JP2005/014649 JP2005014649W WO2007017936A1 WO 2007017936 A1 WO2007017936 A1 WO 2007017936A1 JP 2005014649 W JP2005014649 W JP 2005014649W WO 2007017936 A1 WO2007017936 A1 WO 2007017936A1
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WO
WIPO (PCT)
Prior art keywords
recording
information
speed
reproducing
information disc
Prior art date
Application number
PCT/JP2005/014649
Other languages
English (en)
Japanese (ja)
Inventor
Yorio Takahashi
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to PCT/JP2005/014649 priority Critical patent/WO2007017936A1/fr
Publication of WO2007017936A1 publication Critical patent/WO2007017936A1/fr

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/24—Arrangements for providing constant relative speed between record carrier and head
    • G11B19/247—Arrangements for providing constant relative speed between record carrier and head using electrical means

Definitions

  • the present invention relates to a recording / reproducing apparatus for an information disc and a recording / reproducing speed control method thereof, and more particularly to a recording / reproducing apparatus for an information disc and a recording / reproducing speed thereof for ZCLV recording of a CLV format disc. It relates to a control method.
  • Optical disc recorders are generally formatted using the constant linear velocity (CLV) method.
  • the recording speed can be improved by dividing the disk into multiple areas and recording while changing the CLV recording speed for each area, and CLV format disks at a constant angular velocity (CAV).
  • CAV constant angular velocity
  • a plurality of recording speeds to be supported are determined in advance. For each of these multiple recording speeds, divide the disc into multiple areas, and record while switching the speed for each area so that the maximum rotational speed during recording in each area does not exceed the allowable maximum rotational speed of the system. I do.
  • the linear velocity and track pitch of the disc have a certain allowable range, even if the linear velocity and the track pitch change within the allowable range, the maximum allowable rotational speed of the system is not exceeded.
  • the area is divided in advance based on the time information on the disk.
  • CD-R discs support 8, 16, and 24x recording
  • the maximum allowable rotational speed of the system is 4800 rpm
  • the innermost recording position of the disc is set to a radius of 0.025m and the linear velocity About 1.
  • the area that can be recorded at 8x speed on the innermost circumference must be 4800rpm or less when recording is started at 16x speed.
  • the address range for recording at 8, 16, and 24 times speed is determined in advance so that the rotational speed is not higher than 4800 rpm.
  • Figure 11 shows an example of changes in disk rotation speed and recording speed when this is done.
  • an object of the present invention is to enable speed switching so that recording or reproduction can be completed in the shortest time during ZCLV recording or reproduction.
  • an information disc recording / reproducing apparatus of the present invention records and reproduces information on an information disc having address information that is formatted in a linear recording density constant format while an information track is formed in a spiral shape.
  • An information disc recording / reproducing apparatus capable of controlling the rotation of the information disc and a plurality of predetermined recording / reproducing speeds for recording / reproducing information on the information disc by controlling the rotation control device.
  • the switchable recording / reproducing speed control device and the recording / reproducing speed control device when data is recorded / reproduced to / from the information disc when the rotational speed of the information disc reaches a predetermined value.
  • a control device for controlling and switching the recording / reproducing speed is controlled.
  • the rotational speed of the disc is monitored while recording / reproducing is performed.
  • an information disc recording / playback device capable of performing recording / playback with the shortest recording / playback time for each disk while not exceeding the maximum allowable rotation speed of the system is provided. can do.
  • FIG. 1 is a block diagram of a CD-RZRW recording / reproducing apparatus according to Embodiments 1 and 2 of the present invention.
  • FIG. 2 is a diagram showing an example of changes in disk rotation speed and recording speed when the rotation speed is switched in the apparatus of FIG.
  • FIG. 3 is a diagram showing another example of a change in disk rotation speed and recording speed when the rotation speed is switched in the apparatus of FIG.
  • FIG. 4 is a block diagram of a CD-RZRW recording / reproducing apparatus according to Embodiment 3 of the present invention.
  • FIG. 5 is a diagram showing an example of changes in disk rotation speed and recording speed when the rotation speed is switched in the apparatus of FIG.
  • FIG. 6 is a block diagram of a CD-RZRW recording / reproducing apparatus according to Embodiment 4 of the present invention.
  • FIG. 7 is a block diagram of a CD-RZRW recording / reproducing apparatus according to Embodiment 5 of the present invention.
  • FIG. 8 is a diagram showing an example of changes in disk rotation speed and recording speed when the rotation speed is switched in the apparatus of FIG.
  • FIG. 9 is a block diagram of a CD-RZRW recording / reproducing apparatus according to Embodiment 6 of the present invention.
  • FIG. 10 is a block diagram of a CD-RZRW recording / reproducing apparatus according to Embodiment 7 of the present invention.
  • FIG. 11 is a diagram showing an example of changes in the disk rotation speed and the recording speed when the rotation speed is switched in a conventional apparatus.
  • the present invention is an information disc recording / reproducing apparatus capable of recording / reproducing information on an information disc having address information formatted in a fixed manner with an information track formed in a spiral shape.
  • a rotation control device that controls the rotation of the information disc, and a recording / reproduction speed control device that controls the rotation control device and can switch between a plurality of predetermined recording / reproduction speeds for recording / reproduction on the information disc.
  • a switching control device that controls the recording / reproducing speed control device to switch the recording / reproducing speed when the rotational speed of the information disc reaches a predetermined value is provided.
  • the switching control device when the switching control device records and reproduces data to and from the information disc, it performs recording and reproduction from the inner circumference side to the outer circumference side of the information disc, The recording / reproducing speed is switched when the rotation speed of the information disc becomes a predetermined value or less.
  • the switching control device when the switching control device records and reproduces data on the information disc, the recording control is performed from the outer peripheral side to the inner peripheral side of the information disc, The recording / reproducing speed is switched when the rotation speed of the information disc becomes a predetermined value or more.
  • the rotational speed of the information disc is determined in advance of the disc device after the recording and reproduction speed is switched.
  • the recording / reproducing speed is switched after the rotating speed becomes lower than the maximum rotating speed.
  • the rotational speed of the disc is monitored while recording / reproducing is performed, and the recording / reproducing speed is switched while the maximum allowable rotational speed of the system is not exceeded.
  • an information disc recording / reproducing apparatus capable of performing recording / reproducing with the shortest recording / reproducing time for each disc.
  • the present invention is to record / reproduce information on / from an information disc having address information formatted in a constant manner with a linear recording density in which information tracks are formed in a spiral shape.
  • An information disc recording / reproducing apparatus capable of controlling the rotation of the information disc and a plurality of predetermined recording / reproducing speeds for recording / reproducing information on the information disc by controlling the rotation control device.
  • the switchable recording / reproducing speed control measure, the acceleration detecting device for detecting the acceleration of the information disc recording / reproducing device when the information disc rotates, and the detection result of the acceleration detecting device are below a predetermined value.
  • the information disc recording / reproducing apparatus has a predetermined maximum rotational speed, whichever is smaller, as the maximum rotational speed of the information disc. Recording / reproduction is performed with the inner peripheral force directed to the outer peripheral side, and the information disc rotation speed is changed after the recording / reproduction speed is switched. The after lowered to the rotational speed such that the maximum rotational speed following disk, in which a switching control device for switching the reproducing speed controls the reproducing speed controller
  • the present invention is an information disc recording / reproducing apparatus capable of recording / reproducing information on an information disc having address information formatted in a fixed manner with information tracks formed in a spiral shape.
  • a rotation control device that controls the rotation of the information disc, and a recording / reproduction speed control device that controls the rotation control device and can switch between a plurality of predetermined recording / reproduction speeds for recording / reproduction on the information disc.
  • a vibration detecting device for detecting vibration of the information disc recording / reproducing device when the information disc rotates, and a rotational speed at which a detection result of the vibration detecting device is a predetermined value or less, or the information disc Record the data on the information disk with the maximum rotation speed force of the recording / playback device, which is the maximum rotation speed of the information disk.
  • the recording / reproduction is performed with the inner circumferential side force of the information disc directed to the outer circumferential side, the rotation speed of the information disc becomes lower than the maximum rotation speed of the information disc after switching the recording / reproduction rate.
  • a switching control device for controlling the recording / reproducing speed control device to switch the recording / reproducing speed after the speed is reduced to a speed.
  • the rotational speed of the disk is monitored while the amount of vibration when the disk of the recording / reproducing apparatus is rotated after switching the recording / reproducing speed is less than a predetermined value.
  • the recording / playback speed is switched after the speed that does not exceed the maximum rotational speed of the system, whichever is smaller, is a certain rotational speed or the predetermined maximum rotational speed of the disk unit.
  • the present invention is an information disc recording / reproducing apparatus capable of recording / reproducing information on an information disc having address information formatted in a fixed manner with an information track formed in a spiral shape.
  • a rotation control device that controls the rotation of the information disc, and a recording / reproduction speed control device that controls the rotation control device and can switch between a plurality of predetermined recording / reproduction speeds for recording / reproduction on the information disc.
  • an acceleration detection device for detecting the acceleration of the information disk recording / reproducing device when the information disk rotates
  • a vibration detection device for detecting the vibration of the information disk recording / reproducing device when the information disk rotates.
  • Rotation speed force at which the detection result of the acceleration detection device is less than or equal to a predetermined value, and the detection result of the vibration detection device is less than or equal to a predetermined value When data is recorded / reproduced to / from the information disc, the rotation speed of the information disc is either the maximum rotation speed of the information disc or the maximum rotation speed determined in advance.
  • the inner peripheral side force of the information disk is recorded and reproduced toward the outer peripheral side, and the rotational speed of the information disk is reduced to a rotational speed that is equal to or lower than the maximum rotational speed of the information disk after switching the recording / reproducing speed.
  • a switching control device for controlling the recording / reproducing speed control device to switch the recording / reproducing speed after the decrease.
  • an information disc that can perform recording and playback in the shortest recording and playback time for each disc while preventing troubles in recording and playback due to acceleration due to vibration and preventing the amount of vibration from exceeding a certain level.
  • a recording / reproducing apparatus can be provided.
  • the rotational speed of the disc is monitored while recording / reproducing is performed, and the recording / reproducing speed is switched while the maximum allowable rotational speed of the system is not exceeded.
  • an information disc recording / reproducing apparatus capable of performing recording / reproducing with the shortest recording / reproducing time for each disc.
  • the present invention is an information disc recording / reproducing apparatus capable of recording / reproducing information on an information disc having address information formatted in a fixed manner with an information track formed in a spiral shape. Controls the rotation of the information disc.
  • a control device, a recording / playback speed control device capable of switching a plurality of predetermined recording / playback speeds for recording / playback on the information disc by controlling the rotation control device, and the information disc when the information disc is rotated.
  • An acceleration detection device for detecting the acceleration of the information disc recording / reproducing device, and a rotational speed at which the detection result of the acceleration detection device is equal to or less than a predetermined value.
  • a predetermined maximum rotational speed of the information disc recording / reproducing device is a predetermined maximum rotational speed of the information disc recording / reproducing device.
  • the present invention is an information disc recording / reproducing apparatus capable of recording / reproducing information on an information disc having address information formatted in a fixed manner with an information track formed in a spiral shape.
  • a rotation control device that controls the rotation of the information disc, and a recording / reproduction speed control device that controls the rotation control device and can switch between a plurality of predetermined recording / reproduction speeds for recording / reproduction on the information disc.
  • a vibration detecting device for detecting vibration of the information disc recording / reproducing device when the information disc rotates, and a rotational speed at which a detection result of the vibration detecting device is a predetermined value or less, or the information disc Record the data on the information disk with the maximum rotation speed force of the recording / playback device, which is the maximum rotation speed of the information disk.
  • recording / playback is performed by applying force from the outer circumference side to the inner circumference side of the information disc, and the rotation speed of the information disc is approximately equal to the maximum rotation speed of the information disc.
  • a switching control device for switching the recording / reproducing speed by controlling the recording / reproducing speed control device when the recording / reproducing speed is increased.
  • the rotational speed of the disk is monitored, and the amount of vibration when the disk of the recording / reproducing apparatus rotates after the recording / reproducing speed is switched is less than a predetermined value.
  • the recording / playback speed is switched after the speed that does not exceed the maximum rotational speed of the system, whichever is smaller, is a certain rotational speed or the predetermined maximum rotational speed of the disk unit.
  • the present invention is an information disc recording / reproducing apparatus capable of recording / reproducing information on an information disc having address information formatted in a fixed manner with information tracks formed in a spiral shape.
  • a rotation control device that controls the rotation of the information disc, and a recording / reproduction speed control device that controls the rotation control device and can switch between a plurality of predetermined recording / reproduction speeds for recording / reproduction on the information disc.
  • an acceleration detection device for detecting the acceleration of the information disk recording / reproducing device when the information disk rotates
  • a vibration detection device for detecting the vibration of the information disk recording / reproducing device when the information disk rotates.
  • Rotation speed force at which the detection result of the acceleration detection device is less than or equal to a predetermined value, and the detection result of the vibration detection device is less than or equal to a predetermined value When data is recorded / reproduced to / from the information disc, the rotation speed of the information disc is either the maximum rotation speed of the information disc or the maximum rotation speed determined in advance. In addition, recording / reproduction is performed from the outer peripheral side to the inner peripheral side of the information disc, and the recording / reproduction is performed when the rotational speed of the information disc increases to a rotational speed approximately equal to the maximum rotational speed of the information disc. And a switching control device that controls the speed control device to switch the recording / reproducing speed.
  • the rotation speed at which the detection result of the acceleration detection measure becomes equal to or less than a predetermined value and the detection of the vibration detection device Predetermined and switched so that the lowest rotational speed between the rotational speed at which the result is less than or equal to the predetermined value and the predetermined maximum rotational speed of the disc recording / reproducing device is the maximum rotational speed during operation.
  • a plurality of possible recording speeds are selected and used, and when performing a reproduction operation, a rotation speed at which the detection result of the vibration detection device is equal to or lower than a predetermined value and a predetermined value of the disk recording / reproduction device are determined.
  • a plurality of reproduction speeds that are determined in advance and can be switched are selected and used so that the smaller rotation speed than the maximum rotation speed becomes the maximum rotation speed during operation.
  • the rotational speed of the disk is monitored while recording is performed, and the actual acceleration due to vibration when the disk of the recording / reproducing apparatus rotates after the recording speed is switched is determined in advance.
  • the recording speed is switched after the lowest rotation speed is set to the maximum allowable rotation speed of the system and the speed is not exceeded. Recording can be performed in the shortest recording time for each disk while preventing the value from exceeding a certain level and not exceeding the maximum allowable rotational speed of the set system.
  • the rotational speed force when the amount of vibration when the disk of the recording / playback device rotates is less than or equal to a predetermined value.
  • the predetermined maximum rotational speed force of the disk device whichever is smaller, is allowed by the system. Since multiple playback speeds are selected and switched as the maximum rotation speed, the amount of vibration during playback is prevented from exceeding a certain level, and the maximum rotation speed of the set system is not exceeded.
  • the present invention according to claim 13 is the above-described track cross detection device that generates a track cross pulse based on a reproduction signal when a reference signal for reading Z recording crosses an information track of an information disc;
  • a counting device that counts the track cross pulses detected by the track cross detecting device, and the acceleration detecting device includes a rotation speed of the information disk when the tracking servo is turned off and a result of counting the track cross pulses.
  • the acceleration in the tracking direction between the information track and the reference signal at the current rotational speed is detected.
  • the present invention is a track cross detection device for generating a track cross pulse based on a reproduction signal when a reference signal for reading Z recording crosses an information track of an information disc, and n.
  • a rotation angle detection device for outputting information disk rotation angle information divided into n divided areas per rotation and a reference signal for reading Z recording indicates the direction across the information track of the information disk
  • the track cross pulse output from the track cross detecting device is counted with a sign based on the track cross direction detecting measure for detecting the track cross direction, the detection result of the track cross direction detecting device and the rotation angle information.
  • the vibration detection device is in a state where the tracking servo is turned off and the information disk does not generate vibration.
  • recording / reproduction is performed with a low-cost configuration without special vibration detection means, the rotation speed of the disk is monitored, and the disk of the recording / reproduction device is switched after the recording / reproduction speed is switched.
  • Monitor the rotational speed of the disk whichever is smaller, either the rotational speed force when the amount of vibration when rotating the disk is less than a predetermined value, the maximum rotational speed determined in advance of the disk device, or the power that does not perform recording / playback
  • the actual acceleration due to vibration when the disk of the recording / reproducing device rotates after the recording / reproducing speed is switched is a rotational speed that is equal to or less than a predetermined value, or the disk of the recording / reproducing device is rotated after the recording / reproducing speed is switched.
  • Rotational speed force with a vibration amount of less than or equal to a predetermined value is set as the allowable maximum rotational speed of the system. Since the recording / playback speed is switched after the speed has not been exceeded, the recording / playback based on the acceleration due to vibration is prevented, the vibration level is prevented from exceeding a certain level, and the system is set Thus, it is possible to provide an information disc recording / reproducing apparatus capable of performing recording / reproduction with the shortest recording / reproduction time for each disc while avoiding exceeding the allowable maximum rotational speed.
  • the present invention according to claim 15 is an information disc recording / reproducing apparatus capable of recording / reproducing information on an information disc having address information formatted in a fixed manner with an information track formed in a spiral shape.
  • a recording / reproducing speed for recording / reproducing information on the information disk when the rotation speed of the disk reaches a predetermined value is determined in advance. Switch between multiple recording and playback speeds!
  • the information disc when data is recorded / reproduced on / from the information disc, the information disc is recorded / reproduced from the outer circumference side to the inner circumference side.
  • the recording / playback speed is switched when the rotation speed of the recording medium exceeds a predetermined value.
  • the recording / reproducing operation is performed while the disc rotation speed is monitored and the recording / reproducing speed is switched, so that the maximum allowable rotation speed of the system is not exceeded. Recording and reproduction can be performed with the shortest recording and reproduction time for each disk.
  • the rotation speed of the information disk is not more than a predetermined maximum rotation speed of the disk device after the recording / reproduction speed is switched.
  • the recording / playback speed is switched after the rotation speed reaches
  • the recording / reproducing speed is monitored while the disc rotational speed is monitored, and the recording / reproducing speed is switched while the maximum allowable rotational speed of the system is not exceeded.
  • Recording / reproduction can be performed with the shortest recording / reproduction time for each disc while ensuring that the rotation speed is not exceeded.
  • the present invention is an information disc recording / reproducing apparatus capable of recording / reproducing information on an information disc having address information formatted in a fixed manner with an information track formed in a spiral shape.
  • the rotation speed at which the acceleration of the information disk recording / reproducing apparatus when the information disk rotates is equal to or lower than a predetermined value, or the predetermined maximum rotational speed force of the information disk recording / reproducing apparatus.
  • the force vj is the maximum rotational speed of the information disc.
  • the recording speed for recording playback to broadcasting disc the plurality of recording reproduction speed predetermined also switched to or deviation It is.
  • the present invention is an information disc recording / reproducing apparatus capable of recording / reproducing information on an information disc having address information formatted in a fixed manner with information tracks formed in a spiral shape.
  • the rotation speed at which the vibration of the information disk recording / reproducing apparatus when the information disk rotates is equal to or lower than a predetermined value, or the predetermined maximum rotational speed of the information disk recording / reproducing apparatus, Assuming that the force vj is the maximum rotational speed of the information disc, when recording / reproducing data on the information disc, the inner peripheral side force of the information disc is also directed toward the outer peripheral side, and recording / reproduction is performed.
  • the recording speed for recording playback to broadcasting disc, the plurality of recording reproduction speed a predetermined, also to switch to or deviation.
  • the rotational speed of the disk is monitored while the amount of vibration when the disk of the recording / reproducing apparatus rotates after switching the recording / reproducing speed is below a predetermined value. Since the smaller rotation speed, either a certain rotation speed or the predetermined maximum rotation speed of the disk device, is set as the maximum rotation speed of the system, the recording / playback speed is switched after the speed is not exceeded. Recording / playback can be performed with the shortest recording / playback time for each disc while keeping the maximum allowable rotational speed of the system set so that the value does not exceed a certain level.
  • the information track is formed in a spiral shape, and is recorded and reproduced on an information disc having address information formatted in a constant linear recording density method.
  • the rotation speed of the information disc recording / reproducing apparatus when the information disc is rotated becomes a predetermined rotational speed or less, or the information disc is rotated. Either the rotational speed at which the vibration of the information disk recording / reproducing apparatus is less than a predetermined value or the predetermined maximum rotational speed of the information disk recording / reproducing apparatus, whichever is smaller, is the maximum rotational speed of the information disk.
  • the recording / reproducing speed for recording / reproducing information on the information disc is determined in advance after the rotation speed is reduced to a value equal to or lower than the maximum rotation speed of the information disc. It is used to switch between multiple recording and playback speeds.
  • the recording / playback speed is monitored while the disc rotation speed is monitored, and the recording / playback speed is switched while the maximum allowable rotation speed of the system is not exceeded.
  • Recording / reproduction can be performed with the shortest recording / reproduction time for each disc while ensuring that the rotation speed is not exceeded.
  • the present invention according to claim 23 is an information disc recording / reproducing apparatus capable of recording / reproducing information on an information disc having address information formatted in a fixed manner with an information track formed in a spiral shape.
  • the rotation speed at which the acceleration of the information disk recording / reproducing apparatus when the information disk rotates is equal to or lower than a predetermined value, or the predetermined maximum rotational speed force of the information disk recording / reproducing apparatus. Assuming that the force vj is the maximum rotational speed of the information disc, when data is recorded / reproduced on the information disc, recording / reproduction is performed from the outer circumference side to the inner circumference side of the information disc.
  • the disk rotation speed is monitored while recording / reproduction is performed, and the actual acceleration due to vibration when the disk of the recording / reproduction apparatus rotates after the recording / reproduction speed is switched is determined in advance.
  • Rotational speed force equal to or less than the specified value
  • the maximum rotational speed of the disk unit, whichever is smaller, is set as the maximum rotational speed of the system, and the recording / playback speed is switched after the speed has not been exceeded. Therefore, it is possible to perform recording / reproduction with the shortest recording / reproduction time for each disk while preventing troubles in recording / reproduction based on acceleration due to vibration.
  • the present invention is an information disc recording / reproducing apparatus capable of recording / reproducing information on an information disc having address information formatted in a fixed manner with information tracks formed in a spiral shape.
  • the rotational speed at which the vibration of the information disk recording / reproducing apparatus is below a predetermined value or the predetermined maximum rotational speed of the information disk recording / reproducing apparatus, which is the force Vj is the maximum speed of the information disk.
  • the information disc is recorded / reproduced from the outer peripheral side to the inner peripheral side, and the rotational speed of the information disc is the maximum rotational speed of the information disc.
  • the recording / reproducing speed for recording / reproducing information on the information disc is switched to any of a plurality of predetermined recording / reproducing speeds.
  • the disk rotation speed is monitored while recording / reproducing is performed, and the vibration amount when the disk of the recording / reproducing apparatus rotates after switching the recording / reproducing speed is less than a predetermined value. Since the smaller rotation speed, either a certain rotation speed or the predetermined maximum rotation speed of the disk device, is set as the maximum rotation speed of the system, the recording / playback speed is switched after the speed is not exceeded. Recording / playback can be performed with the shortest recording / playback time for each disc while keeping the maximum allowable rotational speed of the system set so that the value does not exceed a certain level.
  • the present invention according to claim 25 is an information disc recording / reproducing apparatus capable of recording / reproducing information on an information disc having address information formatted in a fixed manner with an information track formed in a spiral shape.
  • the information disc recording / reproducing apparatus when the information disk rotates or the rotational speed at which the acceleration of the information disc recording / reproducing apparatus becomes lower than a predetermined value or the information disk rotates.
  • the information disk is the information disk recording / reproducing apparatus having a rotation speed at which the vibration is less than a predetermined value or a predetermined maximum rotation speed of the information disk recording / reproducing apparatus, whichever is smaller, as the maximum rotation speed of the information disk
  • the information disc is recorded / reproduced from the outer peripheral side toward the inner peripheral side, and the rotational speed of the information disc is
  • the recording / reproducing speed to be recorded / reproduced on the information disk is switched between a plurality of predetermined recording / reproducing speeds! Is.
  • the rotational speed at which the detection result of the acceleration detection device is equal to or less than a predetermined value and the detection result of the vibration detection device are predetermined.
  • a plurality of predetermined and switchable values so that the lowest rotational speed among the rotational speeds below the predetermined value and the predetermined maximum rotational speed of the disk recording / reproducing device is the maximum rotational speed during operation.
  • the recording speed is selected and used for playback, the rotation speed at which the detection result of the vibration detection device is below a predetermined value and the predetermined maximum rotation speed of the disk recording / playback device are small.
  • a plurality of reproduction speeds that are determined in advance and can be switched are selected and used so that one of the rotation speeds becomes the maximum rotation speed during operation.
  • Recording can be performed in the shortest recording time for each disk while ensuring that the maximum allowable rotational speed of the system is not exceeded. Also, during playback, the rotational speed force at which the amount of vibration when the disk of the recording / playback device rotates is less than or equal to a predetermined value.
  • the predetermined maximum rotational speed force of the disk device whichever is smaller, is the maximum allowable rotation of the system Since multiple playback speeds are selected and switched as the speed, the amount of vibration during playback is prevented from exceeding a certain level, and the set Playback can be performed at the maximum playback speed while ensuring that the maximum allowable rotation speed of the stem is not exceeded.
  • a track cross pulse is generated based on a reproduction signal when a reference signal for reading Z recording crosses an information track of an information disc, and the detected track cross
  • the number of pulses and the tracking speed of the information disk when the tracking servo is turned off and the result of counting the track cross pulse indicate the tracking direction between the information track and the reference signal at the current rotational speed. It detects acceleration.
  • a track cross pulse is generated based on a reproduction signal when a reference signal for reading Z recording crosses an information track of an information disc, and n is an arbitrary number
  • the rotation angle information of the information disc is divided into n divided areas per revolution and output, and the track cross direction that indicates the direction in which the reference signal for reading Z recording crosses the information track of the information disc is detected.
  • the track cross pulse is counted with a sign based on the detection result of the track cross direction and the rotation angle information, and the information disk is sufficiently low so as not to generate vibrations with the track kinder servo turned off.
  • the track cross pulse count result when rotating at the first rotation speed and the information disk at the second rotation speed higher than the first rotation speed.
  • the amount of vibration at the second rotational speed is detected by comparing the counting result of the track cross pulse counting device when it is rotated.
  • Rotation speed force at which the amount of vibration when the disk of the recording / playback device rotates after switching the recording / playback speed is less than a predetermined value, whichever is lower Since the speed is the maximum allowable rotation speed of the system, the recording / playback speed is switched after the speed has not been exceeded.
  • the shortest recording / playback for each disc is prevented while preventing disturbance to recording / playback based on acceleration, preventing the amount of vibration from exceeding a certain level, and not exceeding the maximum allowable rotational speed of the system. Recording and playback can be performed in time.
  • Example 1 of the present invention will be described with reference to FIG.
  • FIG. 1 is a block diagram when the present invention is applied to a CD-RZRW recording / reproducing apparatus.
  • Reference numeral 1 denotes an information disc recording / reproducing apparatus.
  • Reference numeral 2 denotes an information disk, in which information tracks are formed in a spiral shape, and have address information formatted by a constant linear velocity method.
  • a recording / reproducing optical disc such as CD-R, CD-RW, DVD-R, DVD-RW, DVD + R, DVD + RW, and the like can be considered.
  • a case where recording is performed on a CD-R or CD-RW disc will be described as an example.
  • a groove called a land Z group is formed in a spiral shape, and address information is pre-recorded in a constant linear velocity format by wobbling the groove.
  • 3 is a disk motor
  • 4 is a disk rotating means such as a disk motor driver.
  • the disk rotating means 4 rotates the information disk 2 installed on the disk motor 3 by rotating the disk motor 3.
  • 5 is a rotation speed detecting means for detecting the rotation speed of the disk motor 3.
  • the rotational speed detection means 5 for example, a method of outputting FG noise for each rotational position using a Hall element, a method of optically detecting the rotational speed by attaching an encoder to the rotating body of the disk motor 3 and the like. There is something used.
  • Reading Z recording means which comprises, for example, a reading Z recording / optical head 12 and a recording data generation circuit 13. Reading of the reproduction signal from the information disk 2 is performed by detecting and calculating the reflected light of the laser emitted to the information disk 2 from the read Z recording / combining optical head 12. At the same time, the tracking Z focus cinder servo is controlled by the signal calculated from the reflected light, but the details for that are omitted in Fig. 1.
  • 7 is an address information generating means for extracting address information from a reproduction signal from the read / recording optical head 12. In the case of CD-RZRW discs, information called ATIP information is extracted from the playback signal from which groove wobbling has been extracted and used as address information on the disc.
  • a recording speed control means 10 is a data rate of the address information generated by the address information generating means 7 according to the value of how many times the predetermined recording data rate is determined by the control means 11.
  • a command is given to the recording speed control means 10 so that is a predetermined multiple of the predetermined recording data rate, and the disk rotation control means 8 controls the disk rotation means 4 to rotate the information disk 2 at a constant linear speed.
  • the recording data generating means 13 of the reading Z recording means 6 is controlled so as to synchronize with the address information generated by the address information generating means 7, so that the recording data is recorded.
  • the generated information is recorded on the recordable information disc 2 by laser beam control from the read / write recording / recording optical head 12.
  • the data rate of the address information generated by the address information generating means 7 is a fixed multiple of the predetermined recording data rate, so the recording speed is also a fixed multiple of the predetermined data rate.
  • the recording speed of the information disc recording / reproducing apparatus 1 being 4, 8, 16, 24 times the predetermined data rate, it is necessary to first determine the recording speed at the innermost circumference.
  • the disk rotation speed V at a certain address position at a certain recording speed is represented by R:
  • the radius of the innermost circumference of the recording area of disk 2 (known by standard: 0.0249 ⁇ 0.002 m for CD-ROM), T: track pitch, AD: number of addresses included in unit time (7 for CD)
  • AD Current address
  • V Linear speed of information disc 2
  • V Recording speed
  • the linear velocity of the information disc 2 can be easily measured without using special hardware. For example, when the information disc 2 is loaded into the device, this linear velocity is read from the current address information near the innermost circumference of the information disc 2, and the reading Z recording / combining optical head 12 is placed on the inner circumference side of one track. It can be obtained by counting the time until it is forcibly transferred to and the same address position is detected again. Various other methods are conceivable. Alternatively, even if the linear velocity is not calculated, the linear velocity value that gives the highest rotational speed of the information disc 2 within the allowable linear velocity range can be used in the same manner. Here, the linear velocity of information disc 2 is calculated as 1.2 mZs, which is the standard value for CD-ROM discs.
  • the innermost recording speed is 8x.
  • the data rate when the information disc 2 is rotated at a recording start position at a rotational speed that is less than or equal to the maximum allowable rotational speed of the system is measured, and the rotational speed with respect to the measured data rate and the recording speed is measured. It is also possible to determine the innermost recording start speed by comparing the ratio of the system to the maximum allowable rotational speed of the system.
  • the control means 11 monitors the current disk rotational speed by the rotational speed detecting means 5 while performing sequential recording, and interrupts the recording when the rotational speed becomes lower than a predetermined rotational speed. Then, after switching the control so that the data rate is 16x, recording is resumed from the point where recording was interrupted at 8x. Next, recording is performed at 16x speed toward the outer circumference, and when the current disc rotation speed falls below the predetermined rotation speed, recording is temporarily suspended again, and the data rate is switched to 24x speed to change the data rate to the outermost circumference. Record until.
  • the rotational speed for switching the recording speed is determined as follows.
  • the upper limit of the rotational speed is determined based on the performance of the disc motor 3. Therefore, when the recording speed is switched to a higher recording speed, the upper limit of the rotational speed must not be exceeded! / After the rotation speed is reached, the speed is switched. Therefore, the rotation speed R at which the speed is switched R
  • 0 is the maximum allowable rotational speed, that is, the upper limit of rotational speed:
  • Fig. 2 shows an example of the change between the disk rotation speed and the recording speed when the rotation speed is switched under the above conditions.
  • the case where recording is performed on the entire surface of the information disc 2 has been described as an example.
  • the present invention can be similarly performed even when the amount of data to be recorded is small and recording is not performed on the entire surface.
  • the case where recording is performed at 4, 8, 16, and 24 times the predetermined data rate has been described as an example, but the same applies to combinations of other data rates and combinations of more data rates. Can be implemented.
  • the CD-RZRW recording / reproducing apparatus has been described as an example. However, if a track is formed in a spiral shape and recording is performed on a disk formatted with a constant linear velocity, the same operation is performed. Is possible.
  • Example 2 of the present invention will be described with reference to FIG.
  • the information disc recording / reproducing apparatus 1 when the information disc recording / reproducing apparatus 1 performs recording at a recording speed that is 4, 8, 16, or 24 times the predetermined data rate, it is necessary to first determine the recording speed at the outermost periphery.
  • the first layer is recorded with the inner peripheral force directed toward the outer periphery
  • the second layer is recorded from the outer periphery toward the inner periphery.
  • the recording operation is already performed at a certain recording speed and a certain rotational speed at the outer peripheral position. For this reason, recording usually starts at the same recording speed.
  • the worst case the highest rotational speed is taken into account), taking into account errors in the track pitch and linear velocity.
  • the recording start speed is determined assuming a combination of Alternatively, at the recording start position, the information disc 2 is loaded at a certain rotational speed below the maximum allowable rotational speed of the system. It is also possible to determine the outermost recording start speed by measuring the data rate when rotating and comparing the ratio between the measured data rate and the recording speed to the maximum allowable rotational speed of the system. is there.
  • the outer peripheral force recording can be started at 24 times speed at the maximum allowable rotational speed force 800 rpm of the predetermined system.
  • the control means 11 monitors the current disk rotation speed with the rotation speed detection means 5, and once stops recording at a predetermined rotation speed. Then, after switching the control so that the data rate is 16 times faster, the continuous force that interrupted the recording at 24 times speed will also resume recording. Similarly, recording is performed at the 16x speed toward the inner circumference, and when the disc 2 reaches a predetermined rotation speed, the recording is temporarily suspended again, and then the data rate is switched to the 8x speed. .
  • the rotational speed at which the recording speed is switched will be described. Normally, in the information disc recording / reproducing apparatus 1, the upper limit of the rotational speed is determined based on the performance of the disk motor 3, so the upper limit of the rotational speed is not exceeded during recording. It will be necessary to change the recording speed. For this reason, the rotation speed when switching the recording speed should be less than the maximum allowable rotation speed of the system! /.
  • Fig. 3 shows an example of the change between the disc rotation speed and the recording speed when the rotation speed is switched based on the present embodiment.
  • the present invention can be similarly performed even when the amount of data to be recorded is small and recording is not performed on the entire surface.
  • the case where recording is performed from the outer periphery to the inner periphery by the CD-RZRW recording / reproducing apparatus has been described as an example.
  • the tracks are formed in a spiral shape, and the outer periphery has a constant linear velocity. The same can be applied to any device that records on a disk formatted so that the address increases toward the inner circumference.
  • the rotational speed is monitored during recording, and the recording speed is switched after reaching a predetermined rotational speed. If it is difficult to constantly monitor the rotational speed during recording, It can be dealt with as follows. In other words, once recording is interrupted near the recording address that is expected to reach the predetermined rotational speed, the current rotational speed at that time is confirmed, and if the predetermined rotational speed is not reached, the recording speed is Without switching, recording is resumed at the original recording speed even at the point where the recording was interrupted. At that time, from the measured rotational speed and the recording address value at which the recording is temporarily suspended, the recording address position that is likely to reach the predetermined rotational speed is calculated again, and the recording is temporarily performed at the same address. The same operation can be performed by interrupting and checking the current rotation speed at that time.
  • the disk rotation speed is monitored while recording, and the recording speed is switched while the allowable maximum rotation speed of the system is not exceeded. It is possible to provide an information disk recording / reproducing apparatus and a recording / reproducing speed control method thereof capable of performing recording with the shortest recording time for each disk without exceeding the allowable maximum rotational speed.
  • Example 3 of the present invention will be described with reference to FIG. However, the detailed description of the same components as those in FIG. 1 for the first embodiment will be omitted to avoid duplication.
  • [0107] 14 is an acceleration detecting means for detecting vibration and eccentric acceleration based on disk rotation in the information disk 2, the disk motor 3, and the reading Z recording means 6.
  • the information disk 2 It can be realized by an acceleration sensor installed integrally with the disk motor 3 and the reading Z recording means 6.
  • the acceleration caused by vibration of the information disc recording / reproducing apparatus 1 can be measured directly or indirectly. Can be used in the same manner.
  • the servo gain in the tracking and focus directions is usually automatically adjusted so as to be a constant gain in a certain frequency band. For this reason, if the amount of servo deviation due to acceleration based on disk rotation exceeds a certain level, the servo may come off.
  • recording Z playback quality may be hindered when tracking Z focus deviation is large. Therefore, by setting the disc rotation speed so that the acceleration does not exceed a certain value for the set servo gain and frequency, the quality of the recording Z playback signal can always be kept above a certain level. For example, the vibration frequency due to the disk rotation is considered to be almost synchronized with the disk rotation, so if the disk rotation speed is 48 OOrpm, it will be 80Hz. Determining the critical acceleration value at this rotational speed from the tracking / focus gain value at 80 Hz and the target tracking Z defocus amount can be easily performed with simple physical calculations. .
  • the allowable maximum rotational speed of the system is determined in advance by the information disc recording / reproducing apparatus 1 as described in the first embodiment, and this rotational speed is assumed to be X.
  • the disk rotation speed at which the acceleration based on the disk rotation is above a certain level is usually determined by the acceleration detection means 14 while the disk rotation speed is increased in advance before the disk is inserted or before recording is started. It is obtained by detecting the rotation speed that exceeds a certain value. If the detection result of the acceleration detecting means 14 does not exceed a certain value even if the rotational speed is accelerated to 3 ⁇ 4, the allowable maximum rotational speed of the system at this time is X. On the other hand, if the predetermined speed value is exceeded halfway, the maximum allowable speed of the system at the time of rotation speed X 1S recording
  • the information disc recording / reproducing apparatus 1 When the information disc recording / reproducing apparatus 1 is capable of recording at a recording speed that is 4, 8, 16, or 24 times the predetermined data rate, first the recording start speed at the innermost circumference is determined.
  • the recording start speed is the rotational speed X force X calculated previously when recording is started on the innermost circumference.
  • the maximum allowable system The rotation speed is 3000rpm. From Table 1 described in Example 1, the rotational speed at the innermost circumference does not exceed 3000 rpm! /, And the recording speed is quadruple speed.
  • the information disc 2 is formatted at a constant linear velocity, so control is performed so that this formatted address information is quadruple the specified data rate.
  • the recording operation is performed while Then, the rotation speed is highest at the innermost circumference, and the rotation speed decreases toward the outer circumference.
  • the control means 11 monitors the current disk rotational speed by the rotational speed detecting means 5 while performing sequential recording, and once suspends the recording when the rotational speed falls below the predetermined rotational speed. Then, after switching the control so that the data rate is 8x speed, the continuous force recording is resumed after the recording was interrupted at 4x speed.
  • the rotation speed for switching the recording speed is the smaller of X or X rotation speed.
  • the maximum allowable rotation speed of the system is 3000 rpm, and the recording speed is 4, 8, and 16 times speed.
  • Fig. 5 shows an example of the change between the disc rotation speed and the recording speed when the rotation speed is switched based on this embodiment.
  • acceleration detection means in order to determine the disk rotation speed at which the acceleration due to disk rotation becomes a certain level or more, acceleration detection means is used while increasing the disk rotation speed when the disk is inserted or before recording is started.
  • a method is used to determine the rotational speed at which the 14 detection results are above a certain value.
  • the present invention is not limited to this, and two or more disk rotation speeds at which acceleration is measured by the acceleration detection means 14 are prepared in advance, and the detection values of the acceleration detection means 14 are acquired at the respective rotation speeds.
  • the method can be similarly implemented by selecting a rotation speed at which the detection result of the acceleration detection means 14 does not exceed a certain value from two or more rotation speeds prepared in advance by comparing with the value.
  • the same operation can be performed by selecting the maximum rotational speed of the information disk recording / reproducing apparatus 1 so that the acceleration during the disk rotation does not exceed a certain value.
  • the present invention can be similarly performed even when the amount of data to be recorded is small and recording is not performed on the entire surface.
  • recording is performed at 4, 8, 16, and 24 times the predetermined data rate, but other combinations of data rates and combinations of more data rates can be similarly implemented.
  • the CD-RZRW recording / reproducing apparatus has been described as an example.
  • the present invention is similarly applied to any apparatus in which tracks are formed in a spiral and recording is performed on a disk formatted with a constant linear velocity. Is possible.
  • the rotational speed is monitored during recording, and the recording speed is switched after reaching a predetermined rotational speed. If it is difficult to constantly monitor the rotational speed during recording, It can be dealt with as follows. In other words, once recording is interrupted near the recording address that is expected to reach the predetermined rotational speed, the current rotational speed at that time is confirmed, and if the predetermined rotational speed is not reached, the recording speed is Without switching, recording is resumed at the original recording speed even at the point where the recording was interrupted. At that time, from the measured rotational speed and the recording address value at which the recording is temporarily suspended, the recording address position that is likely to reach the predetermined rotational speed is calculated again, and the recording is temporarily performed at the same address. The same operation can be performed by interrupting and checking the current rotation speed at that time.
  • the rotational speed of the disk is monitored while recording, and the maximum allowable rotational speed of the system or the acceleration of the drive when the disk rotates is a constant value when switching the recording speed.
  • the rotation speed is the maximum allowable rotation speed during recording, and the recording speed is switched after the above allowable maximum rotation speed is exceeded during recording.
  • the disk rotation speed is monitored while recording, and the recording speed is switched while the system does not exceed the maximum permissible rotation speed of the system during recording.Therefore, the servo error amount is reduced to maintain a good recording state.
  • Information disc recording / reproducing apparatus and recording / reproducing speed capable of performing recording in the shortest recording time for each disc while keeping the value below a certain level It is possible to provide a control method.
  • Example 4 of the present invention will be described with reference to FIG.
  • FIG. 6 is a block diagram of an embodiment in which the present invention is applied to a CD-RZRW recording / reproducing apparatus. However, detailed description of the same constituent elements as those in FIG. 1 for the first embodiment will be omitted in order to avoid duplication.
  • Reference numeral 15 denotes vibration detection means, which is vibration of the information disk recording / reproducing apparatus 1, that is, vibration based on disk rotation in the information disk 2, the disk motor 3, and the reading Z recording means 6. Is detected.
  • the vibration of the information disc recording / playback device 1 is transmitted to devices such as a PC built in the device, causing noise and other problems due to vibrations that only cause discomfort to the user. Is preferred.
  • the vibration detecting means 15 synchronizes with the rotation of the disk 2 based on the detection values of the vibration sensor and the acceleration sensor installed integrally with the information disk 2, the disk motor 3, and the reading Z recording means 6. It is possible to detect by performing integral calculation.
  • other methods can be used in the same manner as long as a means for directly or indirectly measuring the vibration of the information disc recording / reproducing apparatus 1 is used.
  • the maximum allowable rotational speed of the system is determined in advance by the information disc recording / reproducing apparatus 1 as in the case of Example 1, and this rotational speed is X. Also, when determining the disk rotation speed at which the vibration due to disk rotation is above a certain level, the detection of the vibration detection means 15 is usually performed while increasing the disk rotation speed when the disk 2 is inserted or before recording is started. The rotation speed at which the result is a certain value or more is obtained in advance. If the detection result of the vibration detection means 15 does not exceed a certain value even if acceleration is performed until the rotation speed reaches X, the allowable maximum rotation speed of the system at this time is X, and if the vibration value exceeds a predetermined vibration value, When rotation speed X
  • the recording start speed at the innermost circumference is first determined.
  • This recording start speed is equal to the rotation speed X previously determined when recording started on the innermost circumference.
  • the rotation speed is 4100rpm. From Table 1 above, if the rotational speed at the innermost circumference does not exceed 4100 rpm, the recording speed will be 8 times faster.
  • the information disc 2 is formatted at a constant linear velocity, so control is performed so that this formatted address information is 8x the predetermined data rate.
  • the control means 11 monitors the current disk rotational speed from the rotational speed detection means 5 while performing sequential recording, and determines a predetermined rotational speed. Stop recording once the speed falls below. Then, after switching the control so that the data rate is 16 ⁇ , the continuous force recording is resumed after the recording was interrupted at 8 ⁇ .
  • recording is performed sequentially toward the outer periphery at 16 ⁇ speed, and when the current disc rotation speed falls below the predetermined rotation speed, recording is temporarily suspended again, and the data rate is switched to 24 ⁇ speed until the outermost periphery is reached. Make a record.
  • the rotation speed for switching the recording speed is the smaller of X or X rotation speed.
  • the maximum allowable rotation speed of the system is 4100 rpm, and the recording speed is 8, 16, 24 times faster.
  • a disk whose vibration value due to disk rotation is greater than a certain value.
  • the rotation speed we will explain how to determine the rotation speed at which the detection result of the vibration detection means 15 exceeds a certain value while increasing the disk rotation speed when the disk 2 is inserted or before starting recording. did.
  • two or more disk rotation speeds for measuring vibration values by the vibration detection means 15 are prepared in advance, and the detection values of the vibration detection means 15 are acquired at each rotation speed and compared with the threshold values.
  • the method can be similarly implemented by selecting a rotational speed at which the detection result of the vibration detecting means 15 does not exceed a predetermined value from two or more rotational speeds prepared in advance.
  • the maximum rotational speed of the information disk recording / reproducing apparatus 1 is selected so that the vibration value at the time of disk rotation does not exceed a certain value.
  • the present invention can be similarly performed even when the amount of data to be recorded is small and recording is not performed on the entire surface.
  • the force described in the case of recording at a predetermined data rate of 4, 8, 16, and 24 times the speed is the same for other combinations of data rates and combinations of more data rates. Can be implemented.
  • the CD-RZRW recording / reproducing apparatus has been described as an example. However, if the apparatus has a spiral track and records on a disk formatted with a constant linear velocity, the same applies. It can be implemented.
  • the rotational speed is monitored during recording, and the recording speed is switched after reaching a predetermined rotational speed. If it is difficult to constantly monitor the rotational speed during recording, It can be dealt with as follows. In other words, once recording is interrupted near the recording address that is expected to reach the predetermined rotational speed, the current rotational speed at that time is confirmed, and if the predetermined rotational speed is not reached, the recording speed is Without switching, recording is resumed at the original recording speed even at the point where the recording was interrupted. At that time, from the measured rotational speed and the recording address value at which recording was temporarily suspended, the recording address position that is likely to reach the predetermined rotational speed is calculated again, and recording is performed at that address as well. Repeatedly pausing and checking the current rotation speed at that time It can be implemented.
  • the rotational speed of the disk 2 is monitored, and after switching the recording speed, the maximum allowable rotational speed of the system or the vibration of the drive during disk rotation does not exceed a certain value.
  • the lower or lower rotation speed is set as the maximum allowable rotation speed of the system during recording.
  • the recording speed is switched or recording is performed.
  • the external influence of vibration of the information disk recording / reproducing device is kept below a certain level.
  • Example 5 of the present invention will be described with reference to FIG.
  • FIG. 7 is a block diagram of an embodiment when the present invention is applied to a CD-RZRW recording / reproducing apparatus. However, detailed description of the same components as those in FIG. 1 relating to the first embodiment will be omitted in order to avoid duplication.
  • Reference numeral 14 denotes acceleration detection means for detecting vibrations and eccentric acceleration due to disk rotation of the information disk 2, the disk motor 3, and the reading Z recording means 6.
  • the acceleration detecting means 14 can be realized by, for example, an acceleration sensor installed integrally with the information disk 2, the disk motor 3, and the reading Z recording means 6.
  • other methods can be used in the same manner as long as they are means for directly or indirectly measuring the acceleration caused by vibration of the information disc recording / reproducing apparatus 1.
  • the servo gain in the tracking and focus directions is usually automatically adjusted to have a constant gain in a certain frequency band. Therefore, if the amount of servo deviation due to acceleration based on disk rotation exceeds a certain level, the servo will be disengaged, and the tracking Z focus deviation amount will be large, which may affect the recording Z playback quality. Is generally known. Therefore, by setting the disk rotation speed so that the acceleration does not exceed a certain level with respect to the set servo gain and frequency, , Always recording z The quality of the playback signal can be kept above a certain level.
  • the vibration frequency due to disk rotation is considered to be almost synchronized with the disk rotation, so if the disk rotational speed is 800 rpm, it is 80 Hz. Tracking under 80Hz Determining the critical acceleration value at this rotational speed from the Z focus gain value and the target tracking Z defocus amount can be easily performed with simple physical calculations. .
  • Reference numeral 15 denotes vibration detection means, which detects vibration of the information disk recording / reproducing apparatus 1, that is, vibration based on disk rotation in the information disk 2, the disk motor 3, and the read Z recording means 6.
  • the vibration of the information disc recording / playback device 1 is transmitted to devices such as a PC built in the device, causing noise and other problems due to vibrations that only cause discomfort to the user.
  • the vibration detecting means 15 synchronizes with the rotation of the disk 2 based on the detection values of the vibration sensor and the acceleration sensor installed integrally with the information disk 2, the disk motor 3, and the reading Z recording means 6. It is possible to detect by performing integral calculation.
  • other methods can be used in the same manner as long as a means for directly or indirectly measuring the vibration of the information disc recording / reproducing apparatus 1 is used.
  • the allowable maximum rotational speed of the system is determined in advance by the information disc recording / reproducing apparatus 1 as in the case of Example 1, and this rotational speed is assumed to be X. Also, when determining the disk rotation speed at which the acceleration due to disk rotation is above a certain level, the acceleration detection means 14 is usually used while increasing the disk rotation speed when the disk 2 is inserted or before recording is started. The rotation speed at which the detection result is equal to or greater than a predetermined value is obtained in advance. This rotational speed is X and
  • the disk rotation speed at which the vibration due to disk rotation becomes a certain level or more normally, when the disk 2 is inserted or before recording is started, the disk rotation speed is increased while the vibration detection means 15 The rotation speed at which the detection result becomes a certain value or more is obtained in advance. Let this rotational speed be X. Therefore, even if the rotation speed is accelerated to X, the acceleration
  • the allowable maximum rotational speed of the system at this time is X, and an acceleration value determined in the middle Or, if it exceeds a predetermined vibration value, each rotation speed X , X force HS rotation speed is the maximum allowable rotation speed of the system during recording
  • the information disc recording / reproducing apparatus 1 can record at a recording speed 4, 8, 16, or 24 times the predetermined data rate, the recording start speed on the innermost circumference is first determined. This recording start speed is equal to the rotation speed X previously obtained when recording was started on the innermost circumference.
  • the maximum allowable rotation speed of the system is 3800rpm. From Table 1 above, the recording speed at which the rotation speed at the innermost circumference does not exceed 3800 rpm is quadruple speed.
  • the information disc 2 is formatted at a constant linear velocity, so the formatted address information is controlled to a quadruple speed of the predetermined data rate.
  • the rotation speed is highest at the innermost circumference, and the rotation speed decreases toward the outer circumference.
  • the control means 11 monitors the current disk rotation speed from the rotation speed detection means 5 while performing sequential recording, and once stops recording when the rotation speed falls below a predetermined rotation speed. Then, after switching the control so that the data rate is 8 times faster, the recording is resumed even if the recording is interrupted at 4 times faster.
  • recording is performed at the 8x speed sequentially toward the outer circumference, and when the current disc rotation speed falls below the predetermined rotation speed, the recording is temporarily suspended again, and the data rate is switched to the 16x speed. Record until.
  • the rotation speed for switching the recording speed is the smaller of X or X rotation speed.
  • the maximum allowable rotation speed of the system is 3800 rpm, and the recording speed is 4, 8, and 16 times speed.
  • Fig. 5 shows an example of changes in the disk rotation speed and the recording speed when the rotation speed is switched based on the present embodiment.
  • the speed control during reproduction can be determined in the same manner.
  • the speed control during playback differs from that during recording, especially in the case of information recording media such as CD-RZRW. If the acceleration due to vibration is greater than a certain value during recording, the recording quality may deteriorate. Since recording is interrupted, it is necessary to make the acceleration caused by vibrations below a certain value in advance. On the other hand, during playback, there is a strong error correction capability, so there is some signal quality degradation. ⁇ is an acceptable point, and if error correction is not possible, it is sufficient to try reading again at the same speed or at a lower playback speed. For this reason, during playback, it is common to control the vibration value detected by the vibration detection means 15 to be a certain value or less for the purpose of preventing noise caused by disk vibration and vibration of the entire device. It is.
  • the device supports a CD-RZRW playback speed of 8xCAV 16xCA V 20xCAV and the disc rotation speed is 1800rpm at 8xCAV, 3600rpm at 16xCAV, 4000rpm at 20xCAV, it will be detected earlier XX
  • the maximum allowable rotational speed X of the system and the rotational speed X at which the vibration value is above a certain level The lower rotation speed is taken as the maximum allowable rotation speed during playback.
  • X is 4800rpm and X is 4100rpm, so the maximum allowable rotation speed during playback is 4100.
  • vibration detection is performed while increasing the disk rotation speed when a disk is inserted or before recording is started.
  • a method is used in which the rotational speed at which the detection result of means 15 is above a certain value is obtained.
  • the present invention is not limited to this, and two or more disk rotation speeds for measuring vibration values by the vibration detection means 15 are prepared in advance, and the detection values of the vibration detection means 15 are acquired at the respective rotation speeds.
  • the method can be similarly implemented by selecting a rotation speed at which the detection result of the vibration detection means 15 does not exceed a certain value from two or more rotation speeds prepared in advance by comparing with the threshold value. In addition to this, even if the maximum rotation speed of the information disk recording / reproducing apparatus 1 is selected so that the vibration value at the time of disk rotation does not become a certain value or more, it can be similarly implemented.
  • the present invention can be similarly performed even when the amount of data to be recorded is small and recording is not performed on the entire surface.
  • the power described in the case where recording is performed at 4, 8, 16, and 24 times the predetermined data rate is used as an example.
  • Other combinations of data rates and combinations of more data rates are also possible. It can be implemented similarly.
  • the CD-RZRW recording / reproducing apparatus has been described as an example.
  • the present invention is similarly applied to any apparatus in which tracks are formed in a spiral and recording is performed on a disk formatted with a constant linear velocity. Is possible.
  • the case where the recording operation is performed has been described as an example, but the present embodiment can be similarly performed even when the reproducing operation is performed.
  • a separate threshold is used for acceleration because the tracking Z defocus amount required during recording Z playback is different, and a separate threshold is used for the vibration value. It can be similarly implemented by setting. Furthermore, the same can be implemented by setting a combination of separate or common threshold values for each acceleration Z vibration.
  • the rotational speed is monitored during recording, and after reaching a predetermined rotational speed, If the recording speed is switched but it is difficult to constantly monitor the rotation speed during recording, the following measures can be taken. In other words, once recording is interrupted near the recording address that is expected to reach the predetermined rotational speed, the current rotational speed at that time is confirmed, and if the predetermined rotational speed is not reached, the recording speed is The recording is resumed at the original recording speed where the recording was interrupted without switching.
  • the recording address position that seems to reach the predetermined rotational speed is calculated again, and similarly, the recording is temporarily suspended at the address, It can also be implemented in the same way by repeatedly checking the current rotation speed at that time.
  • the rotational speed of the disk is monitored while recording, and after switching the recording speed, the maximum allowable rotational speed of the system or the acceleration of the drive during disk rotation is a constant value.
  • the rotation speed that does not exceed the maximum speed or the drive vibration that does not exceed a certain value is set to the maximum allowable rotation speed of the system during recording. This is because the recording speed is switched after it does not exceed, or the disk rotation speed is monitored while recording and recorded while the maximum allowable rotation speed of the system is not exceeded during recording. Since the recording speed is switched, an information disc recording / reproducing device is used while keeping the servo error amount below a certain level in order to maintain a good recording state.
  • An information disc recording / reproducing device capable of performing recording in the shortest recording time for each disk while keeping the influence of vibration on the outside below a certain level and not exceeding the allowable maximum rotational speed of the system, and its recording / reproducing speed control A method can be provided.
  • Example 6 of the present invention will be described with reference to FIG.
  • FIG. 9 is a block diagram of an embodiment when the present invention is applied to a CD-RZRW recording / reproducing apparatus. However, detailed description of the same components as those in FIG. 1 relating to the first embodiment will be omitted in order to avoid duplication.
  • Reference numeral 16 denotes track cross detection means, which generates a track cross signal based on a reproduction signal when the reference signal 20 from the read Z recording means 6 crosses the track of the information disk 2. 17 is The counting means counts the track cross noise detected by the track cross detection means 16 and outputs it to the control means 11.
  • the tracking servo of the reading Z recording / combining optical head 12 When the tracking servo of the reading Z recording / combining optical head 12 is turned off at a certain rotational speed, the light beam of the reading Z recording / combining optical head 12 causes the eccentricity of the information disc 2 and the disc rotating means 4, and information Due to the self-vibration of the disc recording / reproducing apparatus 1, the track of the information disc 2 reciprocates at the same cycle as the rotation of the information disc 2.
  • the track crossing signal at the time of reciprocation is detected by the track cross detection means 16 and the counting means 17 obtains a total value for one rotation of the disk. Assuming that the reciprocating motion of the light beam can be approximated by a sine wave, the number of traverses of the track for one revolution, m, is 2d.
  • the unit of this function is the number of track crossings.
  • the approximate track pitch is determined by the type of disc. For example, in the case of a CD standard disc, it is 1.5 to 1. Therefore, if this value is T, the acceleration value Is
  • the acceleration value can be obtained from the disk rotation speed ⁇ .
  • the rotational speed of the disk is monitored while recording with an inexpensive configuration without special acceleration detection means, and the maximum allowable rotational speed of the system after switching the recording speed. Does not exceed a certain value ⁇ ⁇ ⁇ ⁇ Rotation speed or drive during disk rotation Of the rotation speeds at which the vibration of the motor does not exceed a certain value, the lower or lower rotation speed is recorded as the maximum allowable rotation speed of the system at the time of recording, after the maximum allowable rotation speed of the system is not exceeded at the time of recording. Since the speed is switched or the recording speed is switched while the recording speed is monitored and the disk rotation speed is not exceeded during recording, the vibration speed of the information disk recording / reproducing device is changed. Information disc recording / reproducing apparatus and recording / reproducing apparatus capable of performing recording in the shortest recording time for each disc while maintaining the maximum allowable rotational speed of the system while keeping the external influence of the system below a certain level. A speed control method can be provided.
  • Example 7 of the present invention will be described with reference to FIG.
  • FIG. 10 is a block diagram of an embodiment when the present invention is applied to a CD-RZRW recording / reproducing apparatus. However, detailed description of the same components as those in FIG. 1 relating to the first embodiment will be omitted in order to avoid duplication.
  • Reference numeral 16 denotes track cross detection means, which generates a track cross signal based on a reproduction signal when the reference signal 20 from the reading Z recording means 6 crosses the track of the information disk 2.
  • Reference numeral 18 denotes a rotation angle detection means, for example, output of rotation angle information of the disk rotation means 4 for each region divided into n per rotation by an FG pulse using a Hall element, an encoder attached to the disk motor 3, etc. .
  • Reference numeral 19 denotes a track cross direction detecting means, for example, a mirror signal obtained by comparing the bright side envelope of the reproduction signal from the reading Z recording / optical head 12 with a threshold value and a reading Z recording / optical head.
  • the track cross direction is compared with the phase of the track cross signal obtained by binarizing the track crossing signal from 12 and the detection result is output to the counting means 17.
  • the counting means 17 counts the track cross pulses detected by the track cross detection means 16 for each of the n-divided areas according to the detection result of the track cross direction detection means 19 and outputs it to the control means 11.
  • the track crossing signal at the time of going back and forth is detected by the track cross detection means 16, track crossing information with a direction sign is obtained according to the detection result of the track cross direction detection means 19, and one rotation is performed according to the detection result of the rotation angle detection means 18 The total value of the count values for each area divided by 6 is obtained.
  • the tracking servo of the read Z recording / optical head 12 is turned off at a second rotational speed that is faster than the first rotational speed, and the count value for each area divided into six in the same manner is divided. Get the total value.
  • the difference in the count value for each corresponding region becomes the track crossing data of the vibration component excluding the eccentric component of the information disk 2 at the second rotational speed.
  • a vibration value can be obtained, and by comparing this with a threshold value, the disk rotation speed at which the vibration value of the information disk recording / reproducing apparatus 1 does not exceed a predetermined value can be obtained.
  • the CD—RZRW disc is rotated at a slow speed of 1435 rpm so as not to generate vibration. Then, with the tracking servo set to Off, the count value of the counting means 17 is obtained for every rotation angle of 60 degrees. As the count value at this time, since no vibration is generated, the count value based only on the eccentric component between the turntables of the disk motor 3 of the information disk 2 is counted. For this count value, for example, measurement is performed for multiple rotations in units of one rotation, and the average value is used as the count value. Similarly, measurement is performed for multiple rotations, and there are few false counts. A method of evaluating a thing and selecting a plurality is possible. [0187] For example, the data measured for 4 rotations with direction detection in each area divided into 6 and the average value are
  • Vibration amount 45.75 tracks
  • this disc is a CD—RZRW disc, so if you multiply the amount of vibration by the standard track pitch 1.6 / z m,
  • Vibration amplitude 73.2 [ ⁇ m]
  • the maximum vibration amplitude allowed in the system is 100 m, which is less than the allowable value, and can be rotated at 3000 rpm.
  • Vibration amount 159 tracks
  • this disc is a CD-R / RW disc, so if you multiply the amount of vibration by a track pitch of 1.6 m,
  • the maximum vibration amplitude allowed in the system is 100 m, which is above the allowable value, so it cannot rotate at 4000 rpm and the maximum rotation speed is set at 3000 rpm.
  • the rotational speed of the disk is monitored while recording with an inexpensive configuration without special vibration detection means, and the disk of the recording / reproducing apparatus is switched after the recording speed is switched.
  • Rotational speed force when the amount of vibration when rotating is below a predetermined value
  • the maximum rotational speed of the disk device, whichever is smaller, or the disk rotational speed is monitored while recording, Whether the actual acceleration due to vibration when the disk of the recording / reproducing device rotates after switching the recording speed is less than a predetermined value or the amount of vibration when the disc of the recording / reproducing device rotates after switching the recording speed is Rotational speed force that is less than or equal to the set value
  • the maximum rotational speed of the disk device which is either vj, or the side, is the system's allowable rotational speed and does not exceed that speed.
  • the information disc recording / reproducing apparatus and the recording / reproducing speed control method of the present invention monitor the rotational speed of the disc while recording / reproducing and switch the recording / reproducing speed, and therefore exceed the maximum allowable rotational speed of the system.
  • An information disc recording / reproducing apparatus capable of performing recording / reproducing with the shortest recording / reproducing time for each disc, and an information disc recording / reproducing apparatus for ZCLV recording a CLV format disc This is useful as a recording / reproducing speed control method.

Landscapes

  • Rotational Drive Of Disk (AREA)

Abstract

La présente invention concerne un dispositif d’enregistrement/reproduction d’informations capable d’effectuer l’enregistrement et la reproduction sur/à partir d’un disque d’informations (2) comportant une piste d’informations en forme de spirale et des informations d’adresse mises en forme avec une densité d’enregistrement linéaire constante. Ce dispositif d’enregistrement/reproduction comprend : un dispositif de contrôle de rotation (8) qui permet de contrôler la rotation du disque d’information (2) ; un dispositif de contrôle de la vitesse d’enregistrement (10) qui permet de contrôler le dispositif de contrôle de rotation (8) pour basculer entre une pluralité de vitesses d’enregistrements prédéterminées pour enregistrer sur le disque d’informations (2) et un dispositif de contrôle de commutation (11) pour contrôler le dispositif de contrôle de la vitesse d'enregistrement (10) afin de basculer cette vitesse lorsque les données doivent être enregistrées sur le disque d'informations (2) et que la vitesse de rotation du disque d'informations (2) a atteint une valeur prédéterminée.
PCT/JP2005/014649 2005-08-10 2005-08-10 Dispositif d’enregistrement/reproduction de disque d’informations et son procédé de contrôle de la vitesse d’enregistrement /reproduction WO2007017936A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/014649 WO2007017936A1 (fr) 2005-08-10 2005-08-10 Dispositif d’enregistrement/reproduction de disque d’informations et son procédé de contrôle de la vitesse d’enregistrement /reproduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/014649 WO2007017936A1 (fr) 2005-08-10 2005-08-10 Dispositif d’enregistrement/reproduction de disque d’informations et son procédé de contrôle de la vitesse d’enregistrement /reproduction

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WO2007017936A1 true WO2007017936A1 (fr) 2007-02-15

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10124993A (ja) * 1996-05-16 1998-05-15 Sanyo Electric Co Ltd 光ディスク再生装置
JP2002197659A (ja) * 2000-12-26 2002-07-12 Sanyo Electric Co Ltd 光ディスク記録再生装置
JP2003297008A (ja) * 2002-03-29 2003-10-17 Matsushita Electric Ind Co Ltd 情報ディスク記録再生装置およびその記録再生速度制御方法
JP2004241114A (ja) * 2004-03-29 2004-08-26 Matsushita Electric Ind Co Ltd 情報ディスク記録再生装置、及び情報ディスク記録再生装置の振動検出方法
JP2004265499A (ja) * 2003-02-28 2004-09-24 Hitachi-Lg Data Storage Inc 光ディスク装置
JP2004280974A (ja) * 2003-03-18 2004-10-07 Matsushita Electric Ind Co Ltd ディスク記録装置
JP2005063495A (ja) * 2003-08-19 2005-03-10 Samsung Electronics Co Ltd 光記録装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10124993A (ja) * 1996-05-16 1998-05-15 Sanyo Electric Co Ltd 光ディスク再生装置
JP2002197659A (ja) * 2000-12-26 2002-07-12 Sanyo Electric Co Ltd 光ディスク記録再生装置
JP2003297008A (ja) * 2002-03-29 2003-10-17 Matsushita Electric Ind Co Ltd 情報ディスク記録再生装置およびその記録再生速度制御方法
JP2004265499A (ja) * 2003-02-28 2004-09-24 Hitachi-Lg Data Storage Inc 光ディスク装置
JP2004280974A (ja) * 2003-03-18 2004-10-07 Matsushita Electric Ind Co Ltd ディスク記録装置
JP2005063495A (ja) * 2003-08-19 2005-03-10 Samsung Electronics Co Ltd 光記録装置
JP2004241114A (ja) * 2004-03-29 2004-08-26 Matsushita Electric Ind Co Ltd 情報ディスク記録再生装置、及び情報ディスク記録再生装置の振動検出方法

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