Video copy-control with plural embedded signals
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United States of America Patent
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Dec 17, 2002
Issued Date -
N/A
app pub date -
Jun 29, 1999
filing date -
Nov 18, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Video is processed to imperceptibly convey two or more auxiliary data (i.e., watermarks). In particular embodiments, the auxiliary data are independent and/or encoded at different strengths. The encoding may be performed by transforming the auxiliary data into a two-dimensional array, and combining this two-dimensional array with corresponding pixels of a video frame. Embodiments of the technology are particularly useful in implementing video copy control systems.
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