CATV transmission system using scrambled signals
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United States of America Patent
Stats
-
Apr 16, 1991
Grant Date -
N/A
app pub date -
Jun 8, 1989
filing date -
Oct 18, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A CATV system includes a main head end as a system center and a plurality of subhead ends. A baseband TV signal is transmitted from the main head end to the subhead ends through optical fiber cables. A scrambling data generating means is disposed in the main head end to generate scrambling data and transmit those together with the TV signal. A scrambling means is disposed in each subhead end to perform a scrambling operation such that synchronization portions of a video signal is compressed on the basis of the scrambling data.
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Family
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Cited Art Landscape
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