Enhanced scrambling method and system for TV signals
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 6, 1988
Grant Date -
N/A
app pub date -
Feb 24, 1987
filing date -
Feb 24, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A television signal transmission system includes a cable head-end having a scrambler for scrambling a television signal and a subscriber decoder having an unscrambler for unscrambling the television signal in response to data signals from the transmitter. The unscrambler in the receiver is operated to unscramble the scrambled signal for authorized subscribers and to further scramble the scrambled signal for unauthorized subscribers.
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Family
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Cited Art Landscape
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