Method and system for embedding binary data sequences into video bitstreams
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United States of America Patent
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Feb 28, 2006
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N/A
app pub date -
Jul 12, 2000
filing date -
Jul 12, 2000
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Abstract
The present invention is a method and system which extracts, manipulates and embeds data from a compressed and standard compliant video bitstream which may be used for digital rights management, e.g. controlling access to a bitstream or for authenticating a video bitstream. The method embeds binary data bits into compressed and standard compliant video bitstream with minimal visual artifacts. The method first parses the compressed video bitstream and locates coded blocks. The codeword C for the last triplet in the original block(RUNc,LEVELc, LASTc=1) is replaced by the VLC code word C′ for the last triplet (RUNC,LEVELC, LASTC′=0). A codeword corresponding to a triplet with LAST=1 is placed after C′ whose sign bit 's' can be either 0 or 1 and is an embedded data bit, and can be used for authentication.
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