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Efficient watermarking approaches of compressed media

  • US 8,995,711 B2
  • Filed: 08/16/2013
  • Issued: 03/31/2015
  • Est. Priority Date: 07/03/2008
  • Status: Active Grant
First Claim
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1. A method of imperceptibly embedding information in a compressed video bitstream, comprising:

  • analyzing the compressed bitstream using a pre-processor to identify locations that can be imperceptibly modified, where the imperceptible modification includes replacing original content using replacement content derived from elsewhere in the compressed bitstream;

    selecting using the pre-processor one or more of the identified locations to be modified;

    generating at least one piece of replacement data for each selected location using the pre-processor, where overwriting a portion of the compressed bitstream at a selected location with a piece of replacement data causes a decoder to decode the replacement data instead of the overwritten portion of the compressed bitstream;

    selecting pieces of replacement data using an embedding device, where each selected piece of replacement data corresponds to a selected location in the compressed bitstream; and

    embedding the payload information in the compressed bitstream in accordance with a predetermined coding scheme by using the embedding device to overwrite the selected locations in the compressed bitstream with the selected pieces of replacement data.

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