| 发明名称 |
Scrambling, descrambling, coding and decoding of videosignals using an encryption key and watermarking |
| 摘要 |
<p>The video signal scrambling method has a video signal (S) with an encryption key (KT) controlling audiovisual information access. Video signal scrambling is applied (38) by a watermark function with a masking key (36) issued from the encryption key. The watermarking has an adjustment parameter allowing adjustment of the signal visibility level.</p> |
| 申请公布号 |
EP1365589(A1) |
申请公布日期 |
2003.11.26 |
| 申请号 |
EP20030291205 |
申请日期 |
2003.05.21 |
| 申请人 |
FRANCE TELECOM |
发明人 |
BODO, YANN;LAURENT, NATHALIE;LAURENT, CHRISTOPHE |
| 分类号 |
H04N21/8358;G06T1/00;H04L9/18;H04N7/167;H04N7/50;H04N21/2347;H04N21/4405;(IPC1-7):H04N7/167 |
主分类号 |
H04N21/8358 |
| 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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