发明名称 |
CONDITIONAL ACCESS INFORMATION ARRANGEMENT |
摘要 |
Apparatus in a receiver, for processing transmitted entitlement control information, includes a packet transport processor (13-15, 19) for selecting signal packets having payloads containing a conditional access payload header and a remaining payload of entitlement data. Respective payload headers include groups of bytes which are coded in a manner to allow or disallow the respective receiver from processing the entitlement data. A conditional access filter (30) preprogrammed with a subscriber specific conditional access codeword examines respective byte groupings of the conditional access header for a match with the subscriber specific conditional access codeword. Only if a match occurs is the processor peemitted to process (17, 18, 21-24) the entitlement data. The entitlement data is thereafter utilized to generate (31) decryption keys for descrambling (16) portions of the transmitted signal. |
申请公布号 |
CA2188127(A1) |
申请公布日期 |
1995.11.02 |
申请号 |
CA19952188127 |
申请日期 |
1995.03.15 |
申请人 |
THOMSON CONSUMER ELECTRONICS, INC. |
发明人 |
TAMER, GREGORY GEORGE;DEISS, MICHAEL SCOTT;CHANEY, JOHN WILLIAM;HAILEY, JAMES EDWIN |
分类号 |
H04N5/00;H04N5/44;H04N7/16;H04N7/167;H04N21/266;H04N21/418;H04N21/426;H04N21/4385;H04N21/4405;H04N21/4623;H04N21/4627 |
主分类号 |
H04N5/00 |
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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