Abstract:
A data search system for searching a data sync pattern stored in an optical disc by using a physical address is disclosed. The data search system comprises a physical address decoder, a data start indicator and a data sync pattern search circuit. The physical address decoder decodes a physical address signal read from the optical disc to obtain the physical address of a current position. The data start indicator generates a start search signal when the pickup head indicates a predetermined physical address to decide a start position. The data sync pattern search circuit searches the data sync pattern of the data from the start position to determine a cluster area of the data following the data sync pattern. The data search system further comprises a window generator, generating a window interval starting from the start position to search the data sync pattern therein.
Abstract:
Disclosed is a data search system for searching the data sync pattern by using a physical address or by detecting the falling edge of the blank area end. The data search system comprises a first data start indicator, a second data start indicator, a decision circuit, a window generator and a data sync pattern search circuit. The first data start indicator generates a first start search signal indicating a first start position. The second data start indicator generates a second start search signal indicating a second start position. The decision circuit selects to output one of the start search signals. The window generator generates a window interval starting from the start position. The data sync pattern search circuit searches a data sync pattern of the data in the window interval to determine the data following the data sync pattern.
Abstract:
Disclosed is a data search system for searching the data sync pattern by using a physical address or by detecting the falling edge of the blank area end. The data search system comprises a first data start indicator, a second data start indicator, a decision circuit, a window generator and a data sync pattern search circuit. The first data start indicator generates a first start search signal indicating a first start position. The second data start indicator generates a second start search signal indicating a second start position. The decision circuit selects to output one of the start search signals. The window generator generates a window interval starting from the start position. The data sync pattern search circuit searches a data sync pattern of the data in the window interval to determine the data following the data sync pattern.
Abstract:
The present invention discloses an address protection method and circuit capable of efficiently protecting inputting addresses from corruption. The predictable order of a series of original addresses is checked and then the correct addresses are generated by correcting the corrupted addresses within the original addresses. The address protection method and circuit according to the present invention can improve the accuracy of the inputting addresses and increase the validity of data in response to the inputting addresses.