Matching Pursuits视频编码中原子匹配块搜索中的权值设计
Weighted Atom Searching Algorithm in Video Coding Based on Matching Pursuits
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摘要: 基于Matching Pursuits的误差图像编码算法因其基函数的灵活性,是一种在低码率视频编码应用中较为理想的算法,块能量搜索算法被用于减少该算法的编码复杂度.针对固定权值加权块搜索算法的不足之处,提出了一种自适应加权块搜索算法,在不增加算法复杂度的情况下,对不同的被编码序列采用不同的权值表完成加权块能量算法;在各种情况下均得到了较理想的编码效果.Abstract: Matching Pursuits is an ideal method in very low bit rate video coding application for its larger, more flexible basis set. Energy-based block searching algorithm is used to reduce the complexity of its coding process. To better distinguish video frames with different motion features, an adaptive weighted energy searching algorithm is put forward in the paper, which uses adaptive weight value for different frames and gets ideal coding effects in most video sequences.
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