Pay TV system
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United States of America Patent
Stats
-
Jan 13, 1981
Grant Date -
N/A
app pub date -
Aug 3, 1978
filing date -
Nov 18, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for coding video information arranged in a plurality of lines comprises means for selectively inverting video information in groups of lines. A random timing device controls the number of lines in successive groups. The video signals in one group are inverted and the video signals in the succeeding group are non-inverted.
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Cited Art Landscape
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