Information processing method, information processing apparatus, program, and storage medium

摘要

A bitstream of each tile in a code sequence is segmented into bitstreams for respective resolution levels (S 70 ). Image key K_I is generated (S 71 ). Bitstream key K_BS is generated from image key K_I using encoding parameters P (S 72 ). Key K_Ti of tile Ti is generated from bitstream key K_BS using information associated with that tile (S 74 ). Finally, keys corresponding to the segmented bitstreams indicating respective resolutions in tile Ti are generated (S 76 ).