基于H．264的多模式自适应环路滤波算法

传统基于块的视频编码系统在码率相对较低的视频编码时总会产生块效应现象.本文在详细分析了H.264环路滤波的基础之上,提出了一种基于多模式的快速环路滤波算法.该算法根据H.264中特有的编码信息,将图像块边界分为五种不同的滤波模式,针对每种模式的特点采用相应的滤波技术,并且利用图像的空间相关性提出了一种快速的边缘强度判别方法.实验结果表明,该算法降低了滤波过程的复杂度,在保持图像客观质量不变或略有降低的同时更好地降低了块效应,大大提高了图像的主观质量.

H.264-based Adaptive In-loop Filter Algorithm with Multi-modes

Traditional block-based video coders suffer from annoying blocking artifacts when they are applied in low bit-rate coding cases.Based on the particular analysis of H.264 in-loop filter,a fast in-loop filter algorithm with multi-modes is proposed in this paper.According to the peculiar coding information in H.264,block boundaries are divided into five filter modes and a corresponding filter technology is adopted for every mode.A fast boundary strength judgment adequately exploiting the spatial correlation in...