In-loop filter algorithm based on content pre-analysis

LU Wen; GAO Xin-bo; HE Li-huo; ZHANG Hua

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In-loop filter algorithm based on content pre-analysis

更新时间：2024-10-14

- In-loop filter algorithm based on content pre-analysis
- Vol. 30, Issue 6, Pages: 95-102(2009)
- 作者机构：
  
  西安电子科技大学电子工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN919.81
- Published：2009
- 稿件说明：
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LU Wen, GAO Xin-bo, HE Li-huo, et al. In-loop filter algorithm based on content pre-analysis[J]. 2009, 30(6): 95-102.
DOI：

LU Wen, GAO Xin-bo, HE Li-huo, et al. In-loop filter algorithm based on content pre-analysis[J]. 2009, 30(6): 95-102. DOI：

摘要

传统基于块的视频编码系统

在较低码率情形下进行编码时总会遇到块效应现象。针对H.264中去块滤波中边缘强度判断的高计算复杂度问题

提出了一种基于内容预分析的快速环路滤波算法。该算法在光流方程的基础之上

充分利用帧间的相关性

采用STGS(spatial-temporal gradient scale)图进行不同区域特征的划分

将块效应强度的划分由以像素为单位转化为以块为单位。实验结果表明

该算法大大降低了滤波算法的复杂度

且主观效果与H.264环路滤波系统的结果相当。

Abstract

Traditional block-based video coders suffered from annoying blocking artifacts in low bit-rate coding.Aiming to high complexity for determining the block edge strength of deblocking filter

a fast in-loop deblocking filter based on content pre-analysis was proposed

which utilized STGS-image to partition character of different regions and measured the block effect intension in blockwise based on optical flow equation and relativity of interframe.Experimental results show that the proposed greatly reduces the complexity of filter algorithm

and then the subjective image quality of the proposed is approximate to that of the H.264 in-loop filter.

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Related Author

Xin-zi ZHENG

Bing-qing LUO

Zhi-xin SUN

Xin-zi ZHENG

ZHOU Wei

LU Lu

YANG Gao-bo1

Related Institution

College of Internet of Things,Nanjing University of Posts and Telecommunications

State Key Laboratory for Novel Software Technology, Nanjing University

Key Laboratory of Broadband Wireless Communication and Sensor Network Technology,Nanjing University of Posts and Telecommunications,Ministry of Education

Institute of Computer Science, South China University of Technology

华南理工大学计算机科学与工程学院

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