Pulse or digital communications – Spread spectrum
Reexamination Certificate
2007-10-02
2007-10-02
Tran, Khanh (Department: 2611)
Pulse or digital communications
Spread spectrum
C358S003280, C380S201000
Reexamination Certificate
active
09951143
ABSTRACT:
The disclosure details a method of measuring the quality of service of broadcast media signals by analyzing digital watermarks embedded in the received broadcast signal. This method enables the quality of the broadcast video or audio signal to be measured without having the original version of the signal before broadcast transmission. Instead, the method analyzes the strength or quality of the embedded digital watermark to determine the quality of the received broadcast signal. The degradation of a watermark signal is used to measure quality of service of broadcast signals, such as audio and video.
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Brunk Hugh L.
Levy Kenneth L.
Tian Jun
Digimarc Corporation
Tran Khanh
LandOfFree
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