Patent ID: 6711107
Filing Date: 2004-03-23
Classification: G11B

Abstract:
A system using CAV (Constant Angular Velocity) control format for recording data on a disk where the existing recorded data is recorded with CLV (Constant linear Velocity) format, the system comprising:a spindle, used for rotating the disk; a spindle control, used for taking control of the spindle rotating; a PUH (Pick-Up Head), used for reading and recording on the disk; a laser driver, generating and outputting a laser driver signal to the PUH for causing the PUH to generating a feed signal and a wobble signal, the wobble signal reflected by the optical disk and then read by the PUH; an automatic power control, used for receiving the feed signal and generating a first control signal used for causing the laser driver to adjust the laser driver signal; a write pulse generator, used for generating a write pulse signal to control the laser driver signal of laser driver; a clock synthesizer, used for providing a clock signal with the write pulse generator; an ATIP (Absolute Time In Pre-grooves) decoder, used for collecting the wobble signal and generating an ATIP decoded data; a CLV value detector, used for receiving the ATIP decoded data and generating a CLV decoded data; a laser power control, used for receiving the CLV decoded data and generating a second control signal, which is used for causing the automatic power control to adjust the first control signal; and a dynamic write strategy table, used for receiving the CLV decoded data, providing a third control signal, and causing the write pulse generator to adjust the write pulse signal.