Patent ID: 7755996
Filing Date: 2010-07-13
Classification: G11B

Abstract:
1. A method for adjusting a write strategy of an optical recording/reproducing apparatus for writing data into an optical disc, comprising steps of: writing data into the optical disc according to a first write strategy wherein the data is stored in the optical disc in forms of a first type of data storage structures with variable lengths and a second type of data storage structures with variable lengths; locating a plurality of the first type of data storage structures corresponding to a specified reference length and calculating the differences between the recording lengths of the plurality of the first type of data storage structures and the specified reference length to obtain a first averaged deviation; locating a plurality of the second type of data storage structures formed next to a first side of the first type of data storage structures and calculating the differences between the recording lengths of the second type of data storage structures at the first side and respective reference lengths to obtain a second averaged deviation; locating a plurality of the second type of data storage structures formed next to a second side of the first type of data storage structures and calculating the differences between the recording lengths of the second type of data storage structures at the second side and respective reference lengths to obtain a third averaged deviation; and adjusting a parameter of the first write strategy so as to generate a second write strategy for subsequently writing data into the optical disc; wherein a laser power pulse signal is generated to write data into the optical disc according to the first write strategy or the second write strategy, and the parameter to be adjusted is a rising time point resulting in a rising edge of the laser power pulse signal or a falling time point resulting in a falling edge of the laser power pulse signal, and the rising time point is adjusted at following situations: (a1) if all the first, second and third averaged deviations are greater than zero, and the third averaged deviation is greater than the second averaged deviation, (a2) if all the first, second and third averaged deviations are less than zero, and the third averaged deviation is less than the second averaged deviation, (a3) if the first and third averaged deviations are greater than zero, and the second averaged deviation is less than zero, (a4) if the first and third averaged deviations are less than zero, and the second averaged deviation is greater than zero, (a5) if the second and third averaged deviations are less than zero, the first averaged deviation is greater than zero, and the third averaged deviation is greater than the second averaged deviation, and (a6) if the second and third averaged deviations are greater than zero, the first averaged deviation is less than zero, and the third averaged deviation is less than the second averaged deviation.