| 基于提升方案的运动补偿时域滤波技术 |
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| 引用本文： | 王员根,李爱凤.基于提升方案的运动补偿时域滤波技术[J].仲恺农业技术学院学报,2007,20(1):46-48,61. |
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| 作者姓名： | 王员根 李爱凤 |
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| 作者单位： | 1. 仲恺农业技术学,院信息学院,广东,广州,510225
2. 广州大学,实验中心,广东,广州,510006 |
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| 摘 要： | 运动补偿时域滤波(Motion-compensated temporal filtering,MCTF)将若干连续的视频帧组成一个图像组(Group of pictures,GOP)进行时域小波分解,与图像组大小固定的结构相比,自适应图像组结构(Adaptive GOPstructure,AGS)提高了编码效率,但实现复杂度也大大增加.作者提出了一种改进的自适应图像组结构(Im-proved adaptive GOP structure,IAGS),利用帧间预测效果来判断视频序列的时域变化特性,时域变化快的序列采用小尺寸图像组,反之采用大尺寸图像组.结果表明,IAGS的编码性能与AGS基本一致,实现复杂度与固定图像组结构相当.
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| 关 键 词： | 可分级视频编码 运动补偿时域滤波 图像组 自适应图像组结构 |
| 文章编号： | 1006-0774（2007）01-0046-03 |
| 收稿时间： | 2006-11-13 |
| 修稿时间： | 2006-11-13 |
Motion-compensated temporal filtering based on lifting scheme |
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| WANG Yuan-gen,LI Ai-feng.Motion-compensated temporal filtering based on lifting scheme[J].Journal of Zhongkai Agrotechnical College,2007,20(1):46-48,61. |
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| Authors: | WANG Yuan-gen LI Ai-feng |
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| Institution: | 1. College of Information, Zhongkai University of Agriculture and Technology, Guangzhou 510225, China; 2. Experiment Center, Guangzhou University, Guangzhou 510006, China |
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| Abstract: | A group of pictures(GOP) consisted of several successive frames was decomposed by motion-compensated temporal filtering(MCTF) to support temporal scalability by using subband/wavelet transform.Compared with fixed-size GOP,adaptive GOP structure(AGS) could improve the coding performance,but its complexity increased extremely.An improved adaptive GOP structure(IAGS) was proposed in this dissertation.The main idea of IAGS was to estimate the sequence's temporal characters by the aid of inter-prediction,which was to adopt the large size of GOP when its temporal features were changing fast,otherwise the small size of GOP was used.The experimental results showed that,IAGS would be competitive with AGS on the coding efficiency,with the same complexity as the fixed-size GOP had. |
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| Keywords: | SVC MCTF GOP AGS |
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