Interdiction method and apparatus with variable dwell time
US5467397A · kind A · utility
7Cited by
9References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1992 |
| Grant date | Nov 14, 1995 |
| Priority date | — |
| Expiry date | Dec 16, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04K2203/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A cable television interdiction apparatus comprises a microprocessor actuation and control means for actuating and controlling one or more frequency agile voltage controlled oscillators. The voltage controlled oscillators selectively jam only unauthorized premium programming transmitted from a headend to a particular subscriber. The method of interdiction comprises the steps of generating and storing voltage control words for operating the oscillators consistent with a headend selected jamming factor for a particular channel to be jammed and addressably transmitted and stored premium programming authorization data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.