Optical data storage and retrieval system and method

摘要

A method for storing data on an optical medium, said method comprising the steps of :
converting binary data words to binary code words in which encoded bits have first and second binary values at a predefined clock interval ;generating, during each clock interval in which said encoded bits have said first binary value, energizing pulses having a uniform duration less than said clock interval ;monitoring said encoded bits to detect an occurrence of any of a first predefined set of encoded bit patterns ;shifting selected ones of said energizing pulses earlier in time with respect to the data in response to detecting any one of said encoded bit patterns of said first predefined set ;monitoring said encoded bits to detect an occurrence of any of a second predefined set of encoded bit patterns ;in response to detecting any one of said encoded bit patterns of said second predefined set, extending one of said energizing pulses ; andturning a laser on and off in response to said energizing pulses and recording indicia on an optical medium thereby.