Patent ID: 6263087
Filing Date: 2001-07-17
Classification: H03M,H04L

Abstract:
A method of decoding a received vector of two half vectors into a sequence of bits comprising the steps of:a) receiving a received vector of two half vectors, including a first half vector containing a synchronization signal and a first modulation vector, and a second half vector containing the synchronization signal and a second modulation vector which is the negation of the first modulation vector, where the received vector is a signal extracted from media according to a watermark extraction method;b) averaging the first half vector with the second half vector to obtain a received synchronization vector;c) determining an amount by which the received synchronization vector must be shifted to obtain the best match with a reference synchronization vector;d) shifting the received vector by the determined amount to obtain an aligned received vector, ande) demodulating the aligned received vector to obtain the sequence of bits.