Watermark embedding
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Oct 17, 2002
app pub date -
Apr 9, 2002
filing date -
Apr 12, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to a watermark embedding method and to transcoding and digital recording apparatus including a facility for watermark embedding. A first embodiment incorporates a watermark embedding system with a cascaded decoder/encoder transcoder of the type commonly found in digital recording apparatuses. An input data stream in a first format is received by a decoder (10) of the transcoder. Coding parameters are fed from a first output of the decoder (10) to a first input of an encoder (30) of the transcoder. A second output of the decoder (10) comprises a baseband video signal which is passed to a first input of an adder (24). An output of a watermark generator (22) is fed to a second input of the adder (24). An output of the adder (24) is fed to a second input of the encoder 30. The output of the encoder (30) comprises the information to be recorded in a second format which is compatible with a storage medium.
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