面向MPEG-4编码器自适应多样性搜索及优化设计  

Adaptive Diversity Search and Optimization Design for MPEG-4 Coder

作　　者：宋昌平[1] 

机构地区：[1]大连职业技术学院,辽宁大连116037

出　　处：《装备制造技术》2011年第1期78-81,共4页Equipment Manufacturing Technology

摘　　要：针对MPEG-4中运动估计的精度和效率的要求,提出了一种基于可变大小块的自适应多样性快速搜索算法。对相同宏块的不同子块,应用两种不同类型的搜索算法——菱形搜索和三步搜索;算法的多样性和子块的自相似性,克服了单个搜索策略的缺点,使得搜索点数大大减少;同时分析和研究了开源MPEG-4视频编码软件XVID,并给出将XVID移植到ADSP-BF533处理器上,完成MPEG-4实时编码的优化设计。实验结果表明,所实现的MPEG-4编码器能够满足实时性要求。To meet motion estimation＇s accuracy and efficiency,an adaptive diversity rapid search algorithm based on variable size block is proposed.Two kinds of search algorithm,diamond search and three step search,are applied to different sub-block of the same macro block.The disadvantages of single search strategy is overcome by algorithm＇s diversity and sub-blocks＇ similarity,which reduce search points obviously.XVID,one of open source software of MPEG-4,is analyzed and researched,and optimization design of transporting XVID into ADSP-BF533 processor is given to achieve real time MPEG-4 encoding.Results show that the MPEG-4 coder implemented by this paper can reach the requirement of real time.

关 键 词：视频压缩 快速搜索 MPEG-4 优化设计 

分 类 号：TP202.7[自动化与计算机技术—检测技术与自动化装置]