Precoding code list optimization method and precoding method

Abstract

The invention provides a precoding code list optimization method which is used to optimize the code lists which represent a brightness coefficient or a chromaticity coefficient related in a precoding process. The method comprises the following steps: selecting any one code list from the code lists which represent the brightness coefficient or the chromaticity coefficient and making the code list corresponding to a coding order number through a Columbus level corresponding rule of entropy coding; converting each code word in the code lists into a Columbus code information bit length according to a relation of the code word in the code lists, the coding order number and the Columbus code information bit length; converting the code lists into a judgment logic, wherein a query condition of the code lists is the judgment condition of the judgment logic and the Columbus code information bit length corresponding to the query result code word in the code lists is a judgment result of the judgment logic. In the invention, the table used in a precoding process is converted into the judgment logic so that a digital terminal does not need to store the table and a large amount of memory resources can be saved.

Description

technical field [0001] The invention relates to the field of audio and video coding and decoding, in particular to a precoding code table optimization method and a precoding method. Background technique [0002] The AVS standard is a digital audio and video codec technical standard independently formulated by my country proposed by the "Digital Audio and Video Codec Technical Standard Working Group" established by the Ministry of Information Industry of China. This standard is a common basic standard for multimedia industries such as digital TV, broadband network streaming media, mobile multimedia communication, and laser video disc. This standard is very advanced, and its coding efficiency is 2-3 times higher than the existing MPEG2 standard, and comparable to the H.264 / AVC standard in terms of coding efficiency, but the technical implementation is simpler. At the beginning of 2006, the Ministry of Information Industry officially approved AVS to become the national standar...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of using a table for precoding in the prior art that requires a large amount of memory resources and reduce the execution efficiency of the precoding process, thereby providing a precoding code table with high execution efficiency and less memory resource occupation Optimization method and precoding method

Images