Television system using a marking code superimposed on the picture
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United States of America Patent
Stats
-
Jan 11, 1983
Grant Date -
N/A
app pub date -
Feb 25, 1981
filing date -
Mar 4, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Television system using a marking code superimposed on a picture. According to the invention, this code is constituted by a strip located in the right-hand part of the picture and formed by a periodic sequence of white and black areas constituting a clock and by a strip located in the left-hand part of the picture and formed by a sequence of white or black areas constituting the actual code. A decoder detects the presence of clock signals and compares the code received with stored codes.
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Family
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