Communication system using digital watermark for synchronizing multiplexed text data to video frames
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United States of America Patent
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Aug 9, 2005
Grant Date -
N/A
app pub date -
Jul 31, 2000
filing date -
Jul 30, 1999
priority date (Note) -
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Abstract
A digital video communication system includes, at a source site, an embedding circuit for embedding a digital watermark in a digital video stream to produce a watermarked digital video stream, and a multiplexer for multiplexing a text data stream with the watermarked digital video stream to produce a multiplexed signal. At a sink site, the system includes a demultiplexer for demultiplexing the multiplexed signal for recovering a watermarked digital video stream and a text data stream. A digital watermark detector is provided for detecting the digital watermark embedded in the recovered digital video stream. A synchronizer responds to the detected digital watermark for synchronizing the recovered text data stream to the recovered video stream.
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