支持动态搜索区域的运动估计硬件结构设计与优化  

Architecture design and optimization for motion estimation with dynamic search range

作　　者：陈运必[1] 郭立[1] 李正东[2] 池凌鸿[1] 

机构地区：[1]中国科学技术大学电子科学与技术系,合肥230027 [2]重庆通信学院电子技术教研室,重庆400035

出　　处：《中国科学院研究生院学报》2012年第4期512-517,共6页Journal of the Graduate School of the Chinese Academy of Sciences

基　　金：国家自然科学基金(61071173)资助

摘　　要：提出一种支持动态搜索区域的可变块大小运动估计硬件结构,弥补固定大小搜索区域的不足,可同时降低外存带宽、计算复杂度和功耗.使用循环分布式存储结构来支持动态搜索区域的数据存取.此外,对耗时的SAD(sum of absolute differences)计算阵列进行均衡的流水线划分和加法逻辑优化.实现结果表明,相比同类设计,该设计以少量的吞吐率损失,换取面积效率和功耗效率的明显提高.A VBSME with dynamic search range is proposed to overcome the defects of the engine with fixed search range, and it reduces off-chip bandwidth, computational complexity, and power dissipation. A circularly distributed storage structure is adopted to realize the access to the dynamic search area. Besides, the time-consuming SAD computing array is divided into the balanced and adder-optimized pipelines. The implementation results show that, compared to traditional engines, the proposed engine can achieve significant improvements of the hardware and the power efficiency without much loss of throughput.

关 键 词：运动估计 动态搜索区域 存储带宽 流水线 大规模集成电路 

分 类 号：TN47[电子电信—微电子学与固体电子学]