Patent ID: 6707626
Filing Date: 2004-03-16
Classification: G11B

Abstract:
An apparatus for detecting synchronous (SYNC) signals written on a recording medium adapted to reproduce data including a SYNC pattern therefrom, the SYNC pattern comprises a predetermined number of symbols written in a predetermined recording unit of said record medium, comprising:a data reproducing mechanism for reproducing the data including the SYNC pattern; a data dividing mechanism for dividing the reproduced SYNC pattern into a plurality of divided groups, each of the divided groups including at least one symbol contained in another divided group so as to overlap the symbols within the divided groups; a comparison mechanism for comparing the symbols of the SYNC pattern with the symbols of each of the divided groups to detect a match between the SYNC pattern and at least one of the divided groups; and an output mechanism for outputting a SYNC detected signal when said at least one of the divided groups matches said SYNC pattern; wherein, when the SYNC pattern comprises (n) symbols; and said data dividing mechanism divides the SYNC pattern into a number of divided groups to satisfy the formula nCk, each of the divided group comprises (nâˆ’k) symbols in order to detect the SYNC detected signal even when k symbols of the reproduced SYNC pattern include errors (here, (k) is a natural number that satisfies the condition, k