IMAGE DECODING DEVICE, GRAPHIC PROCESSING DEVICE, IMAGE DECODING METHOD, AND GRAPHIC PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a graphic processing technology for efficiently decompressing a compressed texture.SOLUTION: An image decoding device includes a main memory 300 and a graphic processing unit (GPU) 200. The GPU 200 includes a variable length decoding part 30 and an inverse discrete cosine transformation (IDCT) part 40. The variable length decoding part 30 executes variable length decoding on a compressed texture on the basis of an encoding table for allocating a code corresponding to a pair of a range of a run number and a range of a level value together with an immediate field indicating at least either an immediate value of the run number or an immediate value of the level value, and the IDCT part 40 restores the texture by performing inverse discrete cosine transformation on the texture on which the variable length decoding has been performed. The main memory 300 includes a texture pool for partially caching the restored texture.SELECTED DRAWING: Figure 1