Optical disk record player with fast access time
First Claim
1. An optical disk record player comprising a means for dividing an optical disk on which digital data signals are recorded;
- a means for detecting said digital signals on said disk;
a signal processing circuit for processing the detected digital signals;
a drive control circuit for controlling said disk drive means in accordance with the output from said signal processing means;
a control circuit for producing a program access mode signal and which receives data position information representing positions of said digital data on said disk in response to an output of said signal detecting means;
a clock generating means for producing a clock signal used for signal processing by said signal processing circuit;
setup means for selecting a disk speed corresponding to a non-normal disk speed and a disk speed control means controlling said clock generating means to vary the frequency of said clock signal by an amount set on said setup means, said clock generating means automatically producing a reference clock signal corresponding to a normal disk speed during the program access mode.
1 Assignment
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Accused Products
Abstract
An optical disk record player including a disk drive motor, a pickup for retrieving information from the surface of the disk, a processing circuit for processing signals provided by the pickup, and a speed control circuit having a clock generator used for the signal processing, wherein when the program access command is entered during the playback mode at an increased or decreased disk speed that is achieved by varying the clock frequency produced by the speed control circuit, the clock frequency is temporarily changed to the normal frequency to cause the normal disk speed in which the program access mode takes place, and thereafter the clock frequency is changed back to the original frequency so that the original disk speed is restored.
42 Citations
11 Claims
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1. An optical disk record player comprising a means for dividing an optical disk on which digital data signals are recorded;
- a means for detecting said digital signals on said disk;
a signal processing circuit for processing the detected digital signals;
a drive control circuit for controlling said disk drive means in accordance with the output from said signal processing means;
a control circuit for producing a program access mode signal and which receives data position information representing positions of said digital data on said disk in response to an output of said signal detecting means;
a clock generating means for producing a clock signal used for signal processing by said signal processing circuit;
setup means for selecting a disk speed corresponding to a non-normal disk speed and a disk speed control means controlling said clock generating means to vary the frequency of said clock signal by an amount set on said setup means, said clock generating means automatically producing a reference clock signal corresponding to a normal disk speed during the program access mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a means for detecting said digital signals on said disk;
Specification