Bilateral anti-copying device for video systems
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United States of America Patent
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-
Jul 28, 1992
Grant Date -
N/A
app pub date -
May 26, 1989
filing date -
May 26, 1989
priority date (Note) -
Expired
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Abstract
A video system anti-copying device in which leading and trailing code sequences are inserted into the luminance portion of a video signal. These code sequences are visually manifested as dropouts on a video monitor. When the sequences match, operation of record circuitry in a video recorder is inhibited.
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