发明名称 |
Cable subscriber control device using shared jamming modules |
摘要 |
A device is disclosed for controlling access to cable television signals. Jamming oscillators are shifted in frequency, jamming multiple services each. The oscillators are shared between multiple subscriber ports, providing a cost effective, high security control system. A modular approach allows security to be added as additional capacity is required. |
申请公布号 |
EP0504991(B1) |
申请公布日期 |
1997.12.17 |
申请号 |
EP19920200717 |
申请日期 |
1992.03.13 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
GURUSAMI, ARAVANAN;CHAMBERLIN, ROBERT;JACEK, VICTOR;COX, JEFFREY;STRONG, THOMAS |
分类号 |
H04N7/16;H04N7/167;H04N21/2347;H04N21/266 |
主分类号 |
H04N7/16 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|