发明名称 |
Adaptive decoding system for processing encrypted and non-encrypted broadcast, cable or satellite video data |
摘要 |
An adaptive decoder generates a program representative datastream, in selectable, encrypted or decrypted form. A method for adaptively processing input encrypted program data with an associated encryption code provides either an encrypted or a decrypted program output. In an encrypted mode, encrypted program data and an associated encryption code is exported to an output port. In a decrypted mode, input encrypted program data is decrypted using an encryption key derived from the encryption code to provide decrypted program data. The decrypted program data is exported to the output port. Non-encrypted program data is exported to an output port in a selectable non-encrypted mode.
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申请公布号 |
US5933500(A) |
申请公布日期 |
1999.08.03 |
申请号 |
US19960761517 |
申请日期 |
1996.11.27 |
申请人 |
THOMSON CONSUMER ELECTRONICS, INC. |
发明人 |
BLATTER, HAROLD;HORLANDER, THOMAS EDWARD;BRIDGEWATER, KEVIN ELLIOTT;DEISS, MICHAEL SCOTT |
分类号 |
H04N5/92;G11B27/031;G11B27/034;G11B27/10;G11B27/30;G11B27/32;H04N7/16;H04N7/167;(IPC1-7):H04N7/16 |
主分类号 |
H04N5/92 |
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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