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US 2006/0133477 A1Published application
Combined video decoder and watermark creator
OwnerJunbiao Zhang, Kumar Ramaswamy +2inventors
InventorsJunbiao Zhang, Kumar Ramaswamy, Jun Li, Jill Boyce
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Abstract
A method and apparatus that inserts watermark signal into decoded video pictures where the watermark creation function is combined with the video decoder and makes use of compressed domain information to create a perceptually adaptive watermark signal.
Claims30
A digital video signal decoding system comprising:
- a video signal decoder for decoding a compressed encoded digital video signal during which at least one piece of compressed domain information is generated;
- and
- a watermark inserter for generating a watermark signal whose strength is derived from the at least one piece of compressed domain information.
A method of watermarking a digital video signal comprising:
- decoding a compressed encoded digital video signal into a decompressed decoded video output during which at least one piece of compressed domain information is generated;
- generating a watermark signal whose strength is derived from the at least one piece of compressed domain information;
- and
- adding the watermark signal to the decompressed decoded video output.
1 more element
A method of watermarking a digital video signal comprising:
- generating a plurality of watermark signals, each watermark signal having different strength;
- storing the plurality of watermark signals in a memory unit;
- decoding a compressed encoded digital video signal into a decompressed decoded video output during which at least one piece of compressed domain information is generated;
- selecting a watermark signal from the plurality of watermark signals stored in the memory unit based on the at least one piece of compressed domain information;
- and
- adding the selected watermark signal to the decompressed decoded video output.
3 more elements
Dependencies are inferred from the claim text.