METHOD FOR REDUCING THE STORAGE AND NUMBER OF COMPUTATIONS REQUIRED FOR INVERSE QUANTIZATION AND INVERSE SCAN IN MPEG VIDEO DECODING

摘要

A method and device for performing inverse quantization and inverse scan on run/level code without expanding the run/level code into a matrix. The run is converted into a coordinate in the matrix. This coordinate can be used to find the inverse quantization value in the inverse quantization matrix. The inverse quantization value is multiplied by the level to produce a dequantized level. The run is replaced by the coordinate and the level is replaced by the dequantized level.