一种低复杂度低码率视频压缩方案

摘要

以H．264视频编码的低复杂度低码率应用为研究对象，分别就编码中关键部分如DCT变换量化模块、预测编码模块、降噪及去块效应等进行深入分析、理论研究和实验仿真，给出实现方案。主要有降低编码复杂度的全零DCT系数块预判、运动估计及模式选择早结束、自适应降噪去块效应以提高图像质量的预处理等。仿真结果表明，该方案达到了低码率低复杂度高质量视频压缩的目的。%In this paper we take low-complexity and low bit-rate application of H.264 video coding as the research object, and conduct through study, theoretical analysis and experimental simulation on key components in coding such as DCT conversion quantisation module, prediction coding module, de-noising and de-blocking effect, etc., and propose the implementation scheme.In main there are the all-zero DCT coefficients block (AZB) detection for reducing the complexity of coding, the early termination of motion estimation and mode selection, and pre-processing of adaptive denoising and de-blocking effect for improving image quality, etc.Simulation results demonstrate that this scheme reaches the goal of high quality video compression with low bit-rate and low-complexity.