计算机工程Issue(3)：274-277,4.DOI:10.3969/j.issn.1000-3428.2014.03.058
基于几何结构的自适应空域错误隐藏算法
Adaptive Spatial Error Concealment Algorithm Based on Geometric Structure
摘要
Abstract
Aiming at the characteristic of damage or lose data during video transmission, an algorithm of adaptive spatial error concealment based on geometric structure is proposed, which can recover the quality of image better. The two nearest surrounding layers of pixels are used to extract the local geometric structure. The proposed algorithm makes use of surrounding pixels of a damaged block to distinguish between smooth block and edge block. Bilinear Interpolation(BI) is used to process smooth block, while edge block makes use of the transition point to detect the edge direction and the lost Macro Block(MB) is partitioned into segments. Each pixel in segments directionally interpolated from the boundary pixels are adjacent to the segments. Experimental results show that the value of Peak Signal to Noise Ratio(PSNR) of reconstructed video is higher than that of BI and Directional Interpolation(DI) by 0.5 dB~3 dB for different rates of lost MB and different video sequences. The proposed algorithm can not only achieve good directional interpolation but also avoid fake edges. The image’s subjective effect has great improvement.关键词
几何结构/错误隐藏/转折点/双线插值/方向插值/空域Key words
geometric structure/error concealment/transition point/Bilinear Interpolation(BI)/Directional Interpolation(DI)/spatial domain分类
信息技术与安全科学引用本文复制引用
杨丹,卢桂馥,周鸣争..基于几何结构的自适应空域错误隐藏算法[J].计算机工程,2014,(3):274-277,4.基金项目
国家自然科学基金资助项目(61231002)；安徽省自然科学基金资助项目(1308085MF95)；高维信息智能感知与系统教育部重点实验室(南京理工大学)开放基金资助项目(30920130122005)；中国博士后科学基金资助项目(2013M531251)。 （61231002）
