Low complexity video decoder

摘要

A low complexity video decoder (100) includes: a fast variable length decoding (VLD) and inverse quantization module (110) arranged to perform fast VLD and inverse quantization on an input bit stream (108) to generate inverse quantization results (118); an inverse transform unit (120) arranged to perform inverse transform on the inverse quantization results (118) to generate inverse transform results (128); a motion compensation module (130) arranged to perform motion compensation according to the input bit stream (108) and generate associated prediction outputs (138); an arithmetic unit (140) arranged to sum up the inverse transform results (128) and the prediction outputs (138) to generate compensated outputs (148); a reconstructed frame output unit (150) arranged to generate reconstructed frames (158) according to the compensated outputs (148); and a frame storage (160) arranged to store some reconstructed frames (158). The low complexity video decoder (100) operates in accordance with a resolution of the reconstructed frames (158), rather than a resolution of a plurality of original frames represented by the input bit stream (108).