发明名称 |
Storage of encrypted digital signals |
摘要 |
Digital video signals are encrypted by a broadcaster based on a key stream and transmitted to a receiver. At the receiver, the signals are decrypted using the broadcaster's keys and processed in unencrypted form to improve recording and/or playback operation. The processed signals are then re-encrypted using the broadcaster's keys, with appropriate time-shifting to align key changes with suitable boundaries in the video stream. The resulting encrypted signals are stored on a storage medium.
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申请公布号 |
US2006015750(A1) |
申请公布日期 |
2006.01.19 |
申请号 |
US20050521864 |
申请日期 |
2005.01.21 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
ASHLEY ALEXIS S.R.;MORRIS OCTAVIUS J. |
分类号 |
G06F12/14;G09C1/00;H04L9/14;H04N5/00;H04N5/913 |
主分类号 |
G06F12/14 |
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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