Watermarking encoding and decoding

David Lowe (Inventor)

Research output: Patent

Abstract

A method of watermark encoding for embedding payload data within carrier data, the method comprising: transforming the carrier data into a plurality of corresponding source vectors using a separating matrix for an independent component analysis for the carrier data; selecting one of the source vectors based, at least in part, on a robustness criterion for the sources; modifying one or more elements of the selected source vector so that the modified one or more elements represent the payload data; and transforming the modified source vector and the plurality of source vectors other than the selected source vector using a mixing matrix for the independent component analysis for the carrier data to generate an output watermarked version of the carrier data.
Original languageEnglish
Patent numberGB 0903570.0
IPCG06T1/00
Publication statusPublished - 2 Mar 2009

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