Interactive video distribution systems – Use surveying or monitoring – By passively monitoring receiver operation
Reexamination Certificate
1996-10-10
2008-01-01
Tran, Hai V. (Department: 2623)
Interactive video distribution systems
Use surveying or monitoring
By passively monitoring receiver operation
C725S009000, C725S010000, C725S012000
Reexamination Certificate
active
07316025
ABSTRACT:
Methods and apparatus for encoding and decoding information in broadcast or recorded segment signals are described. In certain embodiments, an audience monitoring system encodes identification information in the audio signal portion of a broadcast or recorded segment using spread spectrum encoding. A personal monitoring device receives an acoustically reproduced version of the broadcast or recorded signal via a microphone, decodes the identification information from the audio signal portion despite significant ambient noise, and stores this information, automatically providing a diary for the audience member which is later uploaded to a centralized facility. A separate monitoring device decodes additional information from the broadcast signal, which is matched with the audience diary information at the central facility. This monitor may simultaneously send data to the centralized facility using a dial-up telephone line, and receive data from the centralized facility through a signal encoded using a spread spectrum technique and modulated with a broadcast signal from a third-party.
REFERENCES:
patent: 4718106 (1988-01-01), Weinblatt
patent: 5630203 (1997-05-01), Weinblatt
Aijala Victor A.
Cohen Gerald B.
Jensen James M.
Lynch Wendell D.
Urbi Juan C.
Arbitron Inc.
Cowan Liebowitz & Latman P.C.
Flanagan, III Eugene L.
Tran Hai V.
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