Binary arithmetic encoder and encoding method thereof

Abstract

The invention provides an encoding interval update and normalization module, an encoding lower limit update and normalization module, a code stream extraction module, a binary arithmetic encoder and an encoding method thereof. The binary arithmetic encoder comprises an encoding interval update and normalization module, an encoding lower limit update and normalization module and a code stream extraction module, wherein the encoding interval update and normalization module, the encoding lower limit update and normalization module and the code stream extraction module form a parallel three-level stream line structure, and the code stream extraction module can process one or more encoding symbols within one clock cycle. Complete parallel is realized, and the problem of poor parallel in the prior art is solved; in addition, the common use of different encoding modes is realized by a selector to improve the circuit reusability and reduce the hardware cost; and moreover, the code stream extraction operation of the code stream extraction method is simple, and no additional FIFO resource is needed.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a coding interval update and normalization module, a coding lower limit update and normalization module, and a code stream extraction module, and also relates to a coding interval update and normalization module 1. A binary arithmetic coder and a coding method of a coding lower limit update and normalization module and a code stream extraction module. Background technique [0002] Binary arithmetic coder (Context-based Adaptive Binary Arithmetic Coder, referred to as CABAC) is an encoder designed according to the principle of binary arithmetic coding. The binary arithmetic coding technology in CABAC is based on the principle of recursive division of intervals. The coding process of CABAC includes: binarization, context modeling and arithmetic coding. Among them, binarization is to map syntax elements into a series of binary bits through simple variable-length mappin...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a binary arithmetic coder and its encoding method to solve the problem of poor parallelism in existing binary arithmetic coding

[0009] Another object of the present invention is to solve the problem of poor reusability of binary arithmetic coding in the prior art

[0010] Another object of the present invention is to solve the problem of complex code stream extraction operation in the prior art

Images