IMAGE RE-ENCODING DEVICE, IMAGE RE-ENCODING METHOD, AND IMAGE ENCODING PROGRAM

摘要

Provided is an image re-encoding method which simultaneously reduces the block distortion and a memory when re-encoding image data which has been encoded by a first encoding method, by using a second encoding method. The image re-encoding method includes: a decoding step for decoding each block of image data which has been encoded by the first encoding method; and an encoding step for encoding each block of the image data which has been decoded by the decoding step, by using the second encoding method. The encoding step includes: a boundary detection step for detecting a block boundary of the image data which has been encoded by the first encoding method by using the image data encoded by the first encoding method; and a deblocking step for performing a deblocking filter process on the block boundary detected by the boundary detection step.