Importance

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Abstract

A method and apparatus for embedding data in an encoded video bitstream, for example, an MPEG or MPEG-like bitstream, wherein the bitstream includes redundantly coded syntax element values of which one is an overriding value, includes mandatorily coding the syntax element overriding value and replacing the non-overriding syntax element value with the data to be embedded. Apparatus for embedding data in such bitstream includes a coder creating the coded video bitstream with such value mandatorily coded in the overriding syntax element position therein, and a data inserter for inserting the data to be embedded into the non-overriding syntax element position. In an MPEG compressed bitstream, the quantization scale code (QSC) value is mandatorily explicitly coded in the first coded macroblock following a slice header and the embedded data is inserted into the QSC position in the slice header. The invention may be embodied in a computer implemented process and/or in apparatus performing such computer implemented process.

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First Claim