DECODED IMAGE BUFFER COMPRESSION DEVICE AND COMPRESSION METHOD THEREOF

摘要

Disclosed are a decoded image buffer compression device and a compression method thereof. According to an embodiment of the present invention, the decoded image buffer compression device comprises: an adaptive block size-determining unit which adjusts the size of a block when a decoded image buffer is compressed, on the basis of a local distribution of pixel values of an image; a decoded image buffer-compressing unit which performs an adaptive scaling that reduces bit depth of a decoded image by the size of the block determined by the adaptive block size-adjusting unit; and an additional information storage unit which stores additional information that contains a shift value and a minimum pixel value of the decoded image generated from the decoded image buffer-compressing unit.