基于Gabor字典的低速率视频编码  

Low Bit-Rate Video Coding Based on Gabor Dictionary

作　　者：刘利雄[1] 贾云得[1] 廖斌[2] 

机构地区：[1]北京理工大学计算机科学技术学院,北京100081 [2]华北电力大学电气与电子工程学院,北京102206

出　　处：《北京理工大学学报》2007年第7期594-598,共5页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(60473049);国家"八六三"计划项目(2005AA737072)

摘　　要：针对匹配跟踪冗余信号分解的视频编码器搜索最佳匹配误差结构的原子函数时,实现所需运算量复杂的问题.提出基于可分离Gabor字典的匹配跟踪算法,利用一种改进的最佳时频原子搜索策略,使实现算法的计算量显著下降.实验结果表明,在保持原有编码性能的基础上,该算法在视频编码应用中有效地降低了算法复杂度.The computation complexity of the video coders based on matching pursuit is much higher, because of laboriously searching optimal atoms in a redundant dictionary. This paper proposes a video coding algorithm based on discreted Gabor dictionary, which incorporates an improved searching scheme using optimal time-frequency atoms, thus reduces the computation complexity of the original algorithm greatly. Experiment results show the algorithm can keep original coding efficiency and reduce the computation complexity efficiently.

关 键 词：视频编码 匹配跟踪 Gabor字典 原子搜索 

分 类 号：TN919.81[电子电信—通信与信息系统]