Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2004-10-18
2008-11-04
Vu, KimYen (Department: 2135)
Cryptography
Video cryptography
Video electric signal modification
C382S100000, C382S232000
Reexamination Certificate
active
07447314
ABSTRACT:
A bitstream of each tile in a code sequence is segmented into bitstreams for respective resolution levels (S70). Image key K_I is generated (S71). Bitstream key K_BS is generated from image key K_I using encoding parameters P (S72). Key K_Ti of tile Ti is generated from bitstream key K_BS using information associated with that tile (S74). Finally, keys corresponding to the segmented bitstreams indicating respective resolutions in tile Ti are generated (S76).
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Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Gyorfi Thomas
Vu Kim-Yen
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