采用FBMA+EDAZ算法来实现H.263的一种快速算法  

A Fast Algorithm to Implement H.263 Using FDMA with EDAZ

作　　者：沙济彰[1] 吴敏 曹宁[3] 

机构地区：[1]华东理工大学信息科学与工程学院,上海200237 [2]无锡广电网络中心,无锡214061 [3]河海大学电气工程学院,南京210098

出　　处：《华东理工大学学报（自然科学版）》2003年第2期177-180,共4页Journal of East China University of Science and Technology

摘　　要：介绍了采用频域块匹配+预判全零系数运动搜索算法来实现H.263的一种快速算法,分析了预判全零系数运动搜索算法,并在AliceYu算法的基础上提出了改进算法。计算机仿真结果表明:与DSS法相比,本算法的平均搜索次数和平均编码时间大大减少,但码流长度和峰值信噪比基本相当。最后,以该算法实现了软件编码器,它可基本满足可视电话、会议电视等实时通信的要求。A fast motion estimation algorithm to implement the recommendation H.263 is presented using the frequency domain block matching algorithm with early detection of all zero coefficients. The early detection algorithm of all zero coefficients is analyzed and an improved algorithm is proposed based on Alice Yu's algorithm. The results of simulation indicate that the average search times and average encoding time with the algorithm are much less than those with DSS algorithm, with almost similar code length and average PSNR. Finally, a software encoder with the algorithm is implemented, which may basically satisfy the requirements of real time communications such as video phone and video conference.

关 键 词：H.263 运动搜索算法 频域块匹配法 预判全零系数算法 软件编码器 图像编码 图像压缩 FBMA 

分 类 号：TN919.81[电子电信—通信与信息系统]