Abstract: The present invention provides a method and system for audio data retrieval from an optical media. The method includes reading a sector of audio data from the optical media, the sector comprising a sector data and a sector sub-code; collecting the sector sub-code; correcting any errors in the sector data in a fixed time period; calculating a time offset between a time for the collecting of the sector sub-code and the fixed time period; and matching the corrected sector data to the sector sub-code based on the calculated time offset. A method and system for retrieving audio data from an optical media has been disclosed. The present invention uses a fixed time period for the sector data error correction process. By using a fixed correction time, the sector data and the sector sub-code can be automatically matched based upon an offset calculated from the fixed correction time.

Abstract: The present invention provides a method and system for error correction in optical media data processing. The method includes demodulating a data using a conversion table; marking errors which occur during the demodulation; utilizing estimated values for the marked errors; and performing error correction. The method and system marks errors which occur during demodulation. A logic array is used to obtain estimated values for the marked errors. The marking of errors and the use of values from the logic array for the marked errors increases the probability of the C1 and C2 correction processes being able to correct the errors. Fewer “not correctable” data results. This increases the integrity of the read data.

Abstract: The present invention provides a method and system for providing timing adjustments to perform reliable optical recording at high speeds. The present invention includes performing a timing adjustment in a coarse increment to a write control signal using a clock with a cycle less than T, where T is a fundamental unit of time for a data mark; and performing a timing adjustment in a fine increment to the write control signal using a time delay technique. The method and system in accordance with the present invention provides a write control logic which allows for multiple levels of time adjustment for each type of mark. In the preferred embodiment, a dual level timing adjustment technique is provided. The first level provides coarse timing adjustments using a clock with a cycle less than T and parameters to control the power level and time duration of each mark. The second level provides fine timing adjustments using time delay techniques.