Patent ID: 6219319
Filing Date: 2001-04-17
Classification: G11B

Abstract:
A method for writing information into an optical disk and reading it therefrom, said method comprising the steps of:rotating an optical disk for writing data transmitted from a higher rank device at a constant rate (disk driving step);producing a variable clock which varies a write or read clock for each of a plurality of storing regions defined from the inner circumference side toward the outer circumference side of the disk driven at a constant rate (variable clock production step); andwriting or reading data according to the clock produced for each storing region in the variable clock production step (write/read step),wherein the write/read step comprises temporarily storing data, to be written or read, according to a difference between the rate of data input into or output from the higher rank device and the data write/read rate determined for each of the plurality of storing regions (buffer step).