Fast adaptive mode decision algorithm for H.264 based on spatial correlation

FENG Bin; LIU Wen-yu; ZHU Guang-xi

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Fast adaptive mode decision algorithm for H.264 based on spatial correlation

更新时间：2024-10-14

- Fast adaptive mode decision algorithm for H.264 based on spatial correlation
- Issue 1, Pages: 75-80(2006)
- 作者机构：
  
  1. 华中科技大学武汉光电国家实验室
  2. 华中科技大学武汉光电国家实验室,湖北,武汉,430074
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN919.81
- Published：2006
- 稿件说明：
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FENG Bin, LIU Wen-yu, ZHU Guang-xi. Fast adaptive mode decision algorithm for H.264 based on spatial correlation[J]. 2006, (1): 75-80.
DOI：

FENG Bin, LIU Wen-yu, ZHU Guang-xi. Fast adaptive mode decision algorithm for H.264 based on spatial correlation[J]. 2006, (1): 75-80. DOI：

摘要

为了减小H.264编码器的复杂度

提出了一种帧间预测模式快速自适应选择算法。该算法首先利用运动补偿后残差宏块的统计信息

将需要计算率失真代价函数的候选模式减少为一个模式组中包含的模式子集;然后根据相邻的左块和上块的模式

从所选择的模式子集中选出出现概率最高的两种模式来计算并比较率失真代价函数

选出代价最小的模式作为最佳模式。实验表明

本算法平均可以节省编码时间约65%

同时PSNR下降约为?0.24dB

有利于实时应用。

Abstract

A fast adaptive inter prediction modes decision method was proposed to reduce the complexity of H.264 encoder.Firstly the candidate inter modes used in rate distortion optimization can be limited in a small mode group（MG）by using the characteristics of the motion compensated residual image.Then the two most probable modes of the chosen MG are obtained based on the modes of the up MB and the left MB.By calculating and comparing the rate distortion cost of the two modes

the optimum mode of the MB is determined.The experimental results show that the proposed method can save the encoding time up to 65% on average with ?0.24dB performance degradation that can be used in real time applications.

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Related Institution

School of Communication and Information Engineering, Shanghai University

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