Digital watermarking of low bit rate video
First Claim
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1. A method for embedding a digital watermark in a compressed video stream, the method comprising:
- receiving a compressed video stream;
extracting prediction information from the compressed video stream, the prediction information including motion vectors;
computing a strength of an adaptive watermark signal based on the prediction information; and
embedding the adaptive watermark signal with the computed strength into the compressed video stream.
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Abstract
Methods for embedding digital watermarks in compressed video include perceptual adapting a digital watermark in predicted and non-predicted data based on block activity derived from the compressed video stream, embedding in predicted objects in a video stream having separately compressed video objects, and bit rate control of watermarked video.
155 Citations
11 Claims
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1. A method for embedding a digital watermark in a compressed video stream, the method comprising:
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receiving a compressed video stream; extracting prediction information from the compressed video stream, the prediction information including motion vectors; computing a strength of an adaptive watermark signal based on the prediction information; and embedding the adaptive watermark signal with the computed strength into the compressed video stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11)
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9. A non-transitory computer-readable medium on which is stored instructions, wherein the instructions comprise:
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instructions to receive a compressed video stream; instructions to extract prediction information from the compressed video stream, wherein the prediction information includes motion vectors; instructions to compute a strength of an adaptive watermark signal based on the prediction information; and instructions to embed the adaptive watermark signal with the computed strength into the compressed video stream.
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Specification