Method and apparatus for controlling reproduction speed of an optical disk
AssigneeHitachi-LG Data Storage Korea, Inc.
InventorJum Cho
Life of this patent
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Abstract
A method and apparatus for controlling reproduction speed of an optical disk are provided. The method for controlling reproduction speed of an optical disk includes checking whether a read command has been received, and examining whether the received read command is intended for performance evaluation based on the number of backward track jumps of a laser beam irradiated on the optical disk. The method and apparatus for controlling reproduction speed of an optical disk provide designed read performance when an external host executes a performance test.
Claims24
A method for controlling reproduction speed of an optical disk, comprising:
- (a) checking whether a read command has been received;
- and
- (b) examining whether the received read command is intended for performance evaluation based on the number of backward track jumps of a laser beam irradiated on the optical disk.
A method for controlling reproduction speed of an optical disk, comprising:
- (a) checking whether a read command has been received sequentially more than a predefined number of times;
- and
- (b) reproducing data recorded on the optical disk with a maximum rotational speed depending on the checking result.
A method for controlling reproduction speed of an optical disk, comprising:
- (a) examining whether a received read command is intended for performance evaluation based on how many times the read command has been received sequentially;
- (b) examining whether the received read command is intended for performance evaluation based on a number of backward track jumps of a laser beam irradiated on the optical disk;
- and
- (c) reproducing data recorded on the optical disk with a maximum rotational speed if both step (a) and step (b) confirm that the received read command is intended for performance evaluation.
An apparatus for reproducing an optical disk, comprising:
- a motor configured to rotate the optical disk;
- a reader configured to read signals recorded on the optical disk;
- a servo unit configured to control the reader and drive the motor;
- a signal processor configured to demodulate the signals read by the reader into digital data;
- and
- a controller configured to check whether a read command has been received sequentially more than a predefined number of times and reproduce data recorded on the optical disk with a maximum rotational speed by controlling the servo unit depending on the checking result.
An apparatus for reproducing an optical disk, comprising:
- a motor configured to rotate the optical disk;
- a reader configured to read signals recorded on the optical disk;
- a servo unit configured to control the reader and drive the motor;
- a signal processor configured to demodulate the signals read by the reader into digital data;
- a controller configured to examine whether a received read command is intended for performance evaluation based on how many times the read command has been received sequentially, examine whether the received read command is intended for performance evaluation based on a number of backward track jumps of the reader, and reproduce data recorded on the optical disk with a maximum rotational speed by controlling the servo unit if both said examinations confirm that the received read command is intended for performance evaluation.
Dependencies are inferred from the claim text.