Digital video copy protection system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 25, 2001
Issued Date -
N/A
app pub date -
Aug 1, 2000
filing date -
Sep 1, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A formatting apparatus authenticates an information signal prior to mass duplication of the signal by analyzing the signal to detect the presence or absence of a security signal therein, inserting a security signal into the information signal, and recording the modified signal only if no security signal was detected.
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