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 (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).