Video data transfer control system and method
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United States of America Patent
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May 8, 2007
Grant Date -
Oct 10, 2002
app pub date -
Apr 4, 2002
filing date -
Apr 4, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A video data transfer control system allowing secure protection of video data from unauthorized copying is disclosed. A scrambling key used to scramble video data is stored in a key register and a new scrambling key is stored in a register. At the timing of a vertical sync signal of the video data, the scrambling key is changed to the new one. As a result, the scrambling key can be frequently changed while transferring the video data, achieving enhanced protection of the video data from unauthorized copying.
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