H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 1/32 (2006.01) G06T 1/00 (2006.01) G09C 5/00 (2006.01) H04L 12/18 (2006.01) H04L 29/06 (2006.01) H04N 1/387 (2006.01) H04N 7/08 (2006.01) H04N 7/081 (2006.01)
Patent
CA 2367880
A method and apparatus for watermarking an information signal to generate multiple different watermarked copies of the information signal is disclosed. The information signal is segmented into information segments. The plurality of differently watermarked versions of each information segment is then generated and one of the watermarked versions for each segment is selected for each one of the multiple different copies to be generated to generate a sequence of differently watermarked segments which is different for each copy.
L'invention concerne un procédé et un dispositif permettant de marquer un signal d'information d'un filigrane afin de générer des copies multiples filigranées différentes les unes des autres du signal de données. Le signal de données est divisé en segments de données. On génère ensuite les versions multiples de chaque segment de données portant chacune un filigrane distinct et on sélectionne une des versions filigranées de chaque segment pour chaque copie distincte devant être produite, de manière à générer une séquence de segments marqués de filigranes différents, qui varie pour chaque copie.
Brown Ian
Crowcraft Jon
Perkins Colin
Mccarthy Tetrault Llp
University College London
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