Motion picture data encrypting method and computer system and motion picture data encoding/decoding apparatus to which encrypting method is applied
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 1, 2000
Grant Date -
N/A
app pub date -
Oct 14, 1997
filing date -
Nov 14, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Of I, P, and B pictures contained in an MPEG 2 data stream, only the I picture is subjected to encryption such as scramble processing. Scramble rule data used at that time is stored in the lead-in area of an optical disk. A software DVD decoder reads the scramble rule data stored in the lead-in area, and its certification control module descrambles only the I picture. With this processing, the CPU power required for descramble processing can be reduced, and motion picture data can be decoded by the software DVD decoder in real time.
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