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.
|Patent number||GB 0903570.0|
|Publication status||Published - 2 Mar 2009|
Lowe, D. (2009). IPC No. G06T1/00. Watermarking encoding and decoding. (Patent No. GB 0903570.0). http://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20100910&DB=EPODOC&locale=en_EP&CC=WO&NR=2010100398A1&KC=A1&ND=4