Disk driving system and disk driving method
First Claim
Patent Images
1. A disk apparatus which rotationally drives disk-shaped recording medium, comprising:
- optical pick-up means;
driving means for rotationally driving said recording medium in accordance with a control signal derived from said pick-up means;
access means for accessing said recording medium; and
control means for controlling said driving means so that when said access means is accessing a first or second area of said recording medium, said recording medium is rotationally driven by a first or second drive method, respectively,wherein said first area is an area from an innermost region of said recording medium to a limit radius, and said second area is an area from said limit radius to an outermost region of said recording medium,said limit radius being a radius of a maximum linear velocity which a signal processing system is capable of handling when said recording medium is rotationally driven by a constant angular velocity (CAV) method.
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Abstract
In a disk recording/reproduction apparatus, the operational limit of each of a mechanical apparatus and signal processing of a disk drive is taken into consideration. When an area from the innermost region of a disk to a predetermined distance is recorded or reproduced, the disk is rotationally driven by a CAV method, and when an area from the predetermined distance of the disk to the outermost region is recorded or reproduced, the disk is rotationally driven by a CLV method.
34 Citations
14 Claims
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1. A disk apparatus which rotationally drives disk-shaped recording medium, comprising:
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optical pick-up means; driving means for rotationally driving said recording medium in accordance with a control signal derived from said pick-up means; access means for accessing said recording medium; and control means for controlling said driving means so that when said access means is accessing a first or second area of said recording medium, said recording medium is rotationally driven by a first or second drive method, respectively, wherein said first area is an area from an innermost region of said recording medium to a limit radius, and said second area is an area from said limit radius to an outermost region of said recording medium, said limit radius being a radius of a maximum linear velocity which a signal processing system is capable of handling when said recording medium is rotationally driven by a constant angular velocity (CAV) method. - View Dependent Claims (2, 3, 4, 5)
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6. A disk driving method for rotationally driving a disk-shaped recording medium, comprising the steps of:
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(a) recognizing an access position on said recording medium; (b) determining whether said access position is in a first or second area of said recording medium, wherein said first area is an area from an innermost region of said recording medium to a limit radius, and said second area is an area from said limit radius to an outermost region of said recording medium, said limit radius being a radius of a maximum linear velocity which a signal processing system is capable of handling when said recording medium is rotationally driven by a constant angular velocity (CAV) method; and (c) rotationally driving said recording medium by a first or second driving method while access to said first or second area of said recording medium is being performed, respectively. - View Dependent Claims (7, 8)
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9. A disk apparatus which rotationally drives disk-shaped recording medium, comprising:
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optical pick-up means; driving means for rotationally driving said recording medium in accordance with a control signal derived from said pick-up means; access means for accessing said recording medium; and control means for controlling said driving means so that when said access means is accessing a first or second area of said recording medium, said recording medium is rotationally driven by a first or second drive method, respectively, wherein said recording medium has time information indicating time recorded thereon and the control means recognizes a position at which said access means is accessing said recording medium on the basis of said time information to determine if the access position is in the first or second area. - View Dependent Claims (10, 11)
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12. A disk apparatus which rotationally drives disk-shaped recording medium, comprising:
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optical pick-up means; driving means for rotationally driving said recording medium in accordance with a control signal derived from said pick-up means; access means for accessing said recording medium; linear velocity detection means for detecting a linear velocity at the position of said recording medium that said access means is accessing; and control means for controlling said driving means so that when said access means is accessing a first or second area of said recording medium, said recording medium is rotationally driven by a first or second drive method, respectively, wherein said control means recognizes the position at which said access means is accessing said recording medium on the basis of said linear velocity detected by said linear velocity detection means to determine if the access position is in the first or second area. - View Dependent Claims (13, 14)
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Specification