发明名称 |
Partial encryption and PID mapping |
摘要 |
A method of encoding a packetized digital television signal consistent with certain embodiments involves encrypting a portion of the packets containing the digital television signal according to a first encryption algorithm; encrypting the portion of the packets containing the digital television signal according to a second encryption algorithm; leaving a portion of the packets containing the digital television signal unencrypted; assigning a primary packet identifier to the unencrypted packets; assigning a primary packet identifier to the packets encrypted under the first encryption algorithm; and assigning a secondary packet identifier to the packets encrypted under the second encryption algorithm. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
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申请公布号 |
US2006269060(A1) |
申请公布日期 |
2006.11.30 |
申请号 |
US20060474625 |
申请日期 |
2006.06.26 |
申请人 |
CANDELORE BRANT L;UNGER ROBERT A;PEDLOW LEO M JR |
发明人 |
CANDELORE BRANT L.;UNGER ROBERT A.;PEDLOW LEO M.JR. |
分类号 |
H04N7/16;H04N7/167 |
主分类号 |
H04N7/16 |
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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