MOVING IMAGE DECODING SYSTEM

摘要

PURPOSE:To miniaturize an LSI by using an inexpensive DRAM as a memory for prediction and reducing the mounting area of the memory. CONSTITUTION:An adder 4 restors picture data by adding the output of an inverse DCT section 3 and the output of a prediction value calculating section 5, and outputting them to a macro block buffer 11. The data temporarily stored in the macro block buffer 11 are written in a dynamic memory 12 for prediction by taking one word data consisting of luminance component (Y) 2X2 sample, Cr component 1X2 sample, and Cb component 1X2 sample as a unit through a memory data bus 100. The predicted reference block in the former frame stored in the dynamic memory 12 for prediction is outputted to a reference block buffer 14 through a memory data bus 100. The restored picture data of the former frame in the memory 12 are outputted to a line buffer 18 through the memory data bus 100.