Descrambler apparatus
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United States of America Patent
Stats
-
Sep 30, 1986
Grant Date -
N/A
app pub date -
Dec 13, 1983
filing date -
Dec 13, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A descrambler apparatus for use with a video transmitter which transmits scrambled video transmission without detectable horizontal or vertical synchronizing pulses but with a descramble signal which occurs at a random time in each frame and which is coded with information indicating the length of time that the signal precedes a fixed preselected point in the transmitted frames. The descrambler apparatus detects the coding of each descramble signal and, after a length of time corresponding to the coding, generates a full frame sequence of horizontal and vertical sync pulses starting at the preselected point in a frame. The generated sync pulses are combined with the received video signals to produce a properly synchronized video signal.
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Cited Art Landscape
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