Moving-picture encipherment method and system, and enciphered mo

Details Moving-picture encipherment method and system, and enciphered mo Moving-picture encipherment method and system, and enciphered mo

1995-08-21

1997-04-15

Cain, David C.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 9, H04N 7167

Patent

active

056217943

ABSTRACT:
Moving-picture data in a frame is encoded without depending on another frame of moving-picture data, and moving-picture data in a frame is encoded depending on another frame of moving-picture data. Whether each frame of moving-picture data is a frame which was encoded without depending on another frame of moving-picture data or which was encoded depending on another frame of moving-picture data is determined. The frame of moving-picture data was thus determined as having been encoded without depending on another frame of moving-picture data. The enciphered moving-picture data includes the frame of moving-picture data and the frame of moving-picture data which was determined as being the frame which was encoded depending on another frame of moving-picture data.

REFERENCES:
patent: 5104310 (1992-04-01), Walker et al.
patent: 5546461 (1996-08-01), Ibaraki et al.

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