基于敏感度的H.264视频容错编码算法  

Error-resilient Coding Algorithm Based on Sensitivity for H. 264 Video

作　　者：胡琳娜[1,2] 曹宁[2] 康艳萍 

机构地区：[1]南京理工大学紫金学院南京210046 [2]河海大学计算机与信息学院,南京211100 [3]江苏省水利科学研究院,南京210017

出　　处：《科学技术与工程》2013年第28期8479-8482,8491,共5页Science Technology and Engineering

摘　　要：针对视频图像传输中数据丢失和误码而导致的图像质量下降问题,结合灵活宏块排序(FMO)技术和冗余编码的优缺点,提出了一种基于错误敏感度的H.264冗余片编码算法。该算法首先确定运动敏感区域中的错误敏感宏块,然后利用FMO自定义模式进行冗余编码。仿真测试结果表明,该算法能够有效提高视频码流的抗误码能力,重构图像的主观和客观质量有明显提高。Aiming at the decline of quality caused by data loss and error in video image transmission, combined with the characteristics of the Flexible Macro-block Ordering （FMO） technology and redundant coding, a redun- dant encoding algorithm based on error sensitivity for H. 264 is proposed. The proposed algorithm can determine er- ror sensitive macro-block within motion sensitive area firstly before coding, then carries out redundant slices coding by adopting a dynamic Flexible Macro-block Ordering. The simulation results show that the proposed algorithm can enhance the error resilience ability of the video stream, at the same time effectively improve both subjective and ob- jective quality of the decoded picture.

关 键 词：H 264 运动敏感区 错误敏感宏块 灵活宏块排序 FMO 冗余编码 

分 类 号：TN919.81[电子电信—通信与信息系统]