发明名称 |
METHOD AND SYSTEM FOR PROTECTING BY WATERMARKING AGAINST NON-AUTHORISED USE ORIGINAL AUDIO OR VIDEO DATA WHICH ARE TO BE PRESENTED |
摘要 |
For protecting by watermarking against non-authorised use, e.g. non-authorised recording or copying, original audio or video data which are to be presented in a digital cinema, a sender site generates from the original signal at least two differently pre-watermarked versions for successive blocks or frames of the signal, wherein these versions are derived by applying a repeated watermark symbol value to a version and different watermark symbol values to the different versions. The pre-watermarked signal versions are encrypted and transferred e.g. as data files to a digital cinema unit in which they are decrypted. According to the values of a desired watermark information word, corresponding frames or blocks from said decrypted and pre-watermarked versions are assembled in a successive manner, so as to provide and present a watermarked version of said original audio or video signal that carries said watermark information word. |
申请公布号 |
WO2012016883(A1) |
申请公布日期 |
2012.02.09 |
申请号 |
WO2011EP62807 |
申请日期 |
2011.07.26 |
申请人 |
THOMSON LICENSING;ARNOLD, MICHAEL;BAUM, PETER GEORG;GRIES, ULRICH;VOESSING, WALTER |
发明人 |
ARNOLD, MICHAEL;BAUM, PETER GEORG;GRIES, ULRICH;VOESSING, WALTER |
分类号 |
H04L9/00;G06T1/00 |
主分类号 |
H04L9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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