发明名称 |
Partial encryption and PID mapping |
摘要 |
<p>An encryption arrangement for multiple encryption programs. A system according to embodiments of the present invention multiple encrypts only a portion of the data required for full presentation of a television program to permit coexistence of multiple conditional access encryption systems (40, 140) associated with multiple manufacturer's set-top boxes (36, 136) within a single system. PID mapping techniques are used to distinguish between multiple encryptions. By only encrypting a portion of the program, dramatically less bandwidth is consumed than the alternative of multiple encryption of all program data, thus permitting a larger number of programs to be carried over the same bandwidth while permitting coexistence of multiple conditional access systems in a single cable television system (32).</p> |
申请公布号 |
EP2343890(B1) |
申请公布日期 |
2013.09.18 |
申请号 |
EP20110163226 |
申请日期 |
2002.12.13 |
申请人 |
SONY ELECTRONICS INC. |
发明人 |
CANDELORE, BRANT L.;UNGER, ROBERT ALLAN;PEDLOW JR, LEO M. |
分类号 |
H04N7/167;G09C1/00;H04N5/00;H04N7/24 |
主分类号 |
H04N7/167 |
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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