Methods and apparatus for embedding watermarks

Details Methods and apparatus for embedding watermarks Methods and apparatus for embedding watermarks

G - Physics

06

K

G06K 9/00 (2006.01) G06F 17/14 (2006.01) G10L 19/00 (2006.01)

Patent

CA 2529310

Methods and apparatus for embedding a watermark are disclosed. In an example method, one or more frames associated with a compressed digital data stream (240) is identified. Each of the one or more frames is unpacked to determine a plurality of transform coefficient sets (320). The plurality of transform coefficient sets (320) is modified to embed the watermark (230).

L'invention concerne un procédé et des dispositifs permettant l'incorporation d'un filigrane. Un tel procédé consiste par exemple à identifier une ou plusieurs trames associées à un flot (240) de données numériques compressées, et à dégrouper une ou plusieurs trames afin de définir une pluralité d'ensembles (320) de coefficients de transformation, puis à modifier cette pluralité d'ensembles (320) de coefficients de transformation pour incorporer le filigrane (230).

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