Method for identifying markers

Apparatus for recognition of identification patterns in data blocks in order to determine signaling frames, having:

• a) a receiver (202) for receiving a series of data blocks (201a-201n);
• b) an analysis device (301) for analysis of a specific data block from the series of data blocks (201a-201n) in order to determine whether the specific data block contains an identification pattern (203);
• c) an identification device (302) for identification of a data block which does not contain an identification pattern (203) as a speech block (204), and for identification of a data block which does contain an identification pattern (203) as a signaling block (205);
• d) a correlation device (303) for searching for identification patterns (203) in a full rate signaling block (206) which is transmitted at a full rate, and for searching for identification patterns (203) which are contained in a half rate signaling block (207) which is transmitted at a half rate, by means of correlation with a reference pattern (104);
• e) a correlation subdivision device (304) for subdividing the correlation into subareas, which in turn are correlated with a predetermined reference pattern, in order to find signaling frames in the full rate signaling blocks (206) and/or in the half rate signaling blocks (207);
• f) an output device (305) for outputting correlation values (307) in order to indicate signaling frames which have been found;
• and
• g) a sequence controller (306) for controlling an operating sequence and for deciding which correlation values (307) are output in a current state.