发明名称 |
VIDEO CONTROL SYSTEM |
摘要 |
A video recording medium storing a video program includes a series of television fields including a first field containing both a random digital code encrypted according to a code encryption key and program identification data , and a second field containing an unintelligible video signal previously transforme d from an intelligible video signal according to the random digital code.
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申请公布号 |
CA2358691(C) |
申请公布日期 |
2005.08.23 |
申请号 |
CA19912358691 |
申请日期 |
1991.03.26 |
申请人 |
GTE LABORATORIES INCORPORATED |
发明人 |
SIDLO, CLARENCE M.;WALKER, STEPHEN S.;TEARE, MELVIN J. |
分类号 |
H04L9/00;H04N5/913;(IPC1-7):H04N5/913 |
主分类号 |
H04L9/00 |
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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