Data search system for searching a data sync pattern in optical disc and method thereof

A data search system for searching a data sync pattern in an optical disc, the system comprising:

• a first data start indicator, generating a first start search signal indicating a first start position of the data in the optical disc by counting a predetermined amount of preceding data to predict a beginning of data;
• a blank detector, detecting a blank area of the optical disc to generate a blank signal;
• a second data start indicator, generating a second start search signal indicating a third start position according to the blank signal;
• a first window generator, generating a first window interval starting from the first start position;
• a second window generator, generating a second window interval starting from the second start position;
• a decision circuit, employing a selected window interval from the first window interval and the second window interval for the data sync pattern search circuit;
• and
• a data sync pattern search circuit, searching the data sync pattern of the data in the selected window interval to search the data sync pattern therein.

A method for searching a data sync pattern in an optical disc, the method comprising the steps of:

• counting a predetermined amount of preceding data to predict a beginning of data and detecting a blank area of the optical disc to generate a blank signal;
• generating a first start search signal indicating a first start position of the data in the optical disc by predicting the beginning of the data, generating a second start search signal indicating a second start position of the optical disc according to the blank signal;
• outputting a selected start search signal selected from the first start search signal and the second start search signal;
• and
• searching the data sync pattern of the data from the selected start position corresponding to the selected start search signal to determine the data following the data sync pattern.

A method for searching a data sync pattern in an optical disc, the method comprising the steps of:

• counting a predetermined amount of preceding data to predict a beginning of data and detecting a blank area of the optical disc to generate a blank signal;
• generating a first start search signal indicating a first start position of the data in the optical disc by predicting the beginning of the data and generating a second start search signal indicating a second start position of the optical disc according to the blank signal;
• generating a first window interval starting from the first start position and a second window interval starting from the second start position;
• employing a selected window interval selected from the first window interval and the second window interval;
• and
• searching the data sync pattern of the data in the selected window interval to determine the data following the data sync pattern.