An enhanced RF television scrambling system using phase modulation

Author

Long, Michael E. ; Citta, Richard

Volume

34

Issue

2

fYear

1988

fDate

5/1/1988 12:00:00 AM

Firstpage

302

Lastpage

309

Abstract

A novel system for scrambling and descrambling RF television signals for CATV service security is presented. The system has been designed to be low cost, easily manufactured, reliable, and more secure than conventional RF technology. The system uses RF carrier phase modulation to enhance the economy of the RF sync suppression techniques with some of the video and audio signal security attributes of baseband systems. Surface-acoustic-wave filters are used to implement the modulation. The encoding system provides a means of reliable, noise-insensitive addressable data communication to subscribers´ descramblers without the use of a separate data channel

Keywords

community antenna television; data communication systems; decoding; encoding; phase modulation; video signals; CATV service security; RF sync suppression techniques; RF television scrambling system; RF television signals; SAW filters; addressable data communication; audio signal security; baseband systems; descrambling; encoding system; phase modulation; Baseband; Communication system security; Costs; Data security; Filters; Manufacturing; Phase modulation; RF signals; Radio frequency; TV;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.2945

Filename

2945