Marking a digitally encoded video and/or audio signal

J.P. Linnartz (Inventor)

Research output: PatentPatent publication

12 Downloads (Pure)

Abstract

An electronic watermarking scheme is proposed that can significantly increase the security of copy protection mechanisms. The watermarking methods works at high level in the hierarchy of the (MPEG) source signal. This ensures that the watermark is easily detectable, but difficult to erase without significant transcoding effort. Such transcoding is considered a difficult and expensive task that may furthermore lead to loss of quality or increase in bit rate.
Original languageEnglish
Patent numberUS6131161
Filing date3/10/96
Publication statusPublished - 10 Oct 2000

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