The Nielsen Comapny (US), LLC

Nielsen Media Research, Inc.

Ronald Schwerer

David Howell Wright

Morris Lee

Kevin Keqiang Deng

Michael Alan Hicks

William H Schilp

Daniel John Nelson

Signature-based program identification apparatus and methods for use with digital audio and/or video systems are disclosed. The disclosed systems and methods develop signatures of digital audio and/or video content from a digital data stream at two or more sites and compare the signatures to one another to identify the content.

Signature-based program identification apparatus and methods for use with digital broadcast systems

Methods and apparatus to extract audio codes are disclosed. An example method includes receiving signals on a plurality of channels and ranking the signals based on at least one characteristic of the signals. A first channel from the plurality of channels is selected based upon the ranking of the signals. The example method further include determining whether a first signal on the first channel includes at least one code and extracting the at least one code from the first signal when the first signal includes the at least one code.

Methods and apparatus to extract codes from a plurality of channels

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Belleair Beach, FL, United States of America

Ronald Schwerer