Television picture and sound scrambler and method
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United States of America Patent
Stats
-
Jul 21, 1987
Grant Date -
N/A
app pub date -
Oct 15, 1984
filing date -
Oct 15, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Television signal scrambling is effected by combining moderate level trap-attenuation of the visual carrier frequency with an injected fm-modulated interfering signal to effect, by adjustment of amplitude and fm-modulation levels, satisfactory picture scrambling and overpowering audio distortion in the user's television receiver.
First Claim
Family
International Classification(s)
Cited Art Landscape
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