Satellite video multiplexing communications system
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United States of America Patent
Stats
-
Jul 29, 1980
Grant Date -
N/A
app pub date -
Feb 22, 1978
filing date -
Feb 22, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A video multiplexing communications system for distributing two distinct video programs via a single satellite channel utilizes time division principles, transmitting alternating lines of video information for the two programs by a single frequency modulated carrier to increase FM carrier-to-noise, thereby also maintaining each video program signal-to-noise ratio above FM detection threshold. The alternating lines are compacted in time and occupy a substantial portion of the synchronizing pulse period of the video lines; one line is partially repeated to reduce spurious system transient responses upon inter-program line switching; and amplitude expansion/reduction may be employed to maintain a large FM carrier deviation.
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