| 可变树长混合小波和子树自量化分形视频编码 |
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| 引用本文： | 李静英,余兆明. 可变树长混合小波和子树自量化分形视频编码[J]. 南京邮电大学学报(自然科学版), 1999, 0(4) |
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| 作者姓名： | 李静英 余兆明 |
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| 作者单位： | 南京邮电学院信息工程系!江苏南京210003 |
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| 摘 要： | 对可变树长混合小波和子树自量化分形视频编码方案进行了探讨。通过金字塔小波分解,每一视频序列帧被分解为多频率子带,将它们按一定方式组织成小波子树结构来表示视频序列的运动特性。对这些小波子树进行运动检测,分成运动树和非运动树两类。非运动树的编码直接、简单;运动树则采用可变树长混合小波和子树自量化方法来进行编码。实验结果表明:在低比特率情况下,文中所述的方案在PSNR(峰值信噪比)和主观质量两方面均可获得较好的性能
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| 关 键 词： | 金字塔小波分解 可变树长 Range树 Domain树 运动树 非运动树 |
Variable Tree size A daptive Fractal Video Coding Based on Mixed Wavelet Transformation and Subtrees |
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| LIJing ying,YUZhao ming DepartmentofInformationEngineering,NanjingUniversity ofPostsandTelecommunications,Nanjing China. Variable Tree size A daptive Fractal Video Coding Based on Mixed Wavelet Transformation and Subtrees[J]. JJournal of Nanjing University of Posts and Telecommunications, 1999, 0(4) |
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| Authors: | LIJing ying YUZhao ming DepartmentofInformationEngineering NanjingUniversity ofPostsandTelecommunications Nanjing China |
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| Affiliation: | LIJing ying,YUZhao ming DepartmentofInformationEngineering,NanjingUniversity ofPostsandTelecommunications,Nanjing 2 10 0 0 3China |
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| Abstract: | Explorationhasbeenconductedtothevariabletree sizeadapativefractalvideocodingscheme basedonmixedwavelettransformationandsubtrees.Throghpyramidalwavelettransformation ,eachframeof videosequenceisdecomposedintomulti subbands,whicharestructuredintoasetofwaveletsubtreestorepre sentthemotioncharacteristicsofthevideosequence .Aftermotiondetection ,thesewaveletsubtreesareclassified into 2types,motionandnon motionsubtrees.Thecodingofnon motionsubtreesisstraightforwardandsimple , whilethemotionsubtreesareencodedusingvariabletree sizeadaptivefractalcodingbasedonmixedwavelet transformationandsubtrees.Experimentalresultshaveshownthattheproposedschemeprovidessatisfactory performanceintermsofbothPSNRandsubjectivequality . |
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| Keywords: | Pyramidal waveletde composition Variable tree size Rangetree Domain tree Motion sub tree Non motionsubtree . |
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