| 发明名称 |
SUBSCRIPTION TELEVISION SYSTEM |
| 摘要 |
In a subscription television system, only a video signal for a specific program is scrambled in a television signal in accordance with a predetermined scrambling mode. A key signal, used for unscrambling the scrambled video signal, is generated in response to the scrambling mode. The key signal is transmitted after the scrambled program. |
| 申请公布号 |
DE3275697(D1) |
申请公布日期 |
1987.04.16 |
| 申请号 |
DE19823275697 |
申请日期 |
1982.09.09 |
| 申请人 |
SONY CORPORATION |
发明人 |
FUJIUMURA, YASUSHI C/O. SONY CORPORATION;OKADA, TAKASHI C/O. SONY CORPORATION;YAMAGIWA, KAZUO C/O. SONY CORPORATION |
| 分类号 |
G06F1/00;G11B20/00;H04N5/913;H04N7/167;(IPC1-7):H04N7/16;G11B23/28 |
主分类号 |
G06F1/00 |
| 代理机构 |
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