Method, apparatus and system for recognizing broadcast segments

Details Method, apparatus and system for recognizing broadcast segments Method, apparatus and system for recognizing broadcast segments

H - Electricity

04

H

325/27, 350/3

H04H 9/00 (2006.01) H04N 7/13 (1990.01)

Patent

CA 1323415

-170- METHOD APPARATUS AND SYSTEM FOR RECOGNIZING BROADCAST SEGMENTS A method, apparatus and system are provided for recognizing broadcast segments, such as commer- cials, in real time by continuous pattern recognition without resorting to cues or codes in the broadcast signal. Each broadcast frame is parametized to yield a digital word and a signature is constructed for segments to be recognized by selecting, in accord- ance with a set of predefined rules, a number of words from among random locations throughout the segment and storing them along with offset infor- mation indicating their relative locations. As a broadcast signal is monitored, it is parametized in the same way and the library of signatures is compared against each digital word and words offset therefrom by the stored offset amounts. A data reduction tech- nique minimized the number of comparisons required while still maintaining a large database.

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