amigo@milton.u.washington.edu (The Friend) (05/16/91)
All scrambling entails (in TV use) is to modify the sync signal. If
the sync gets off-set enough from its normal position, it can't be tuned
in. Of the types out there, there seems to be only 3 major types:
gated sync, variable sync, and surpressed sync.
Variable goes all over the place - in a sine-wave pattern
(also affects audio since the sync passes through the audio channel).
Surpressed doesn't contain enough (or none at all) sync for video-alignment
- so it must be recreated by timing clock in a descrambler. My guess with
gated is that it pulses off-set from where the sync should be, so that
video is off-set from where it should be.
What I'm wondering is how each looks in-use on TV?
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Scott Rowin /// amigo@milton.u.washington.edu
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