SCRAMBLE PROCESSOR, DESCRAMBLE PROCESSOR, IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, SCRAMBLE PROCESSING METHOD, DESCRAMBLE PROCESSING METHOD, AND PROGRAM

摘要

PPROBLEM TO BE SOLVED: To apply a scramble process to an image content without violating a description rule of image encoding data. PSOLUTION: In this scramble processor 1, discrete cosine conversion is applied to image data for each block obtained by dividing an image region, and the input of encoding data generated by respectively converting obtained coefficients on a frequency component basis to variable-length code strings is received. A code string selection part 11 selects code strings of an alternate current component in code strings included in the encoding data from a plurality blocks. A code string change part 12 changes the selected code strings selected by the code string selection part 11 among the corresponding blocks. PCOPYRIGHT: (C)2010,JPO&INPIT