Patent ID: 7228274

Claim:
A method for recognizing identification patterns in data blocks to determine signaling frames, the method comprising: receiving a series of data blocks in a receiver, the series of data blocks including at least one data block that includes speech information and at least one data block that includes signaling information; analyzing a specific data block from the series of data blocks to determine whether the specific data block contains an identification pattern; identifying a data block lacking an identification pattern as a speech block; identifying a data block containing an identification pattern as a signaling block; searching for identification patterns in a full rate signaling block; searching for identification patterns in a half rate signaling block; providing a predetermined reference pattern for correlation; sub-dividing the correlation into subareas; correlating the subareas by a predetermined reference pattern, to find signaling frames in at least one of the full rate signaling blocks and-the half rate signaling blocks; and outputting correlation values to indicate signaling frames have been found.