| 完全可伸缩的小波视频编码方法 |
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| 引用本文： | 谭毅华,田金文,柳健,朱光喜.完全可伸缩的小波视频编码方法[J].华中科技大学学报(自然科学版),2005,33(9):9-12. |
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| 作者姓名： | 谭毅华 田金文 柳健 朱光喜 |
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| 作者单位： | 华中科技大学,图像处理与智能控制教育部重点实验室,湖北,武汉,430074;华中科技大学,电子信息与工程系,湖北,武汉,430074;华中科技大学,图像处理与智能控制教育部重点实验室,湖北,武汉,430074;华中科技大学,电子信息与工程系,湖北,武汉,430074 |
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| 基金项目： | 国家高技术研究发展计划资助项目（2004AA119010-6）. |
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| 摘 要： | 提出以小波编码的方法实现适应网络传输的完全可伸缩视频编码．在时间方向完成运动可逆的时域滤波，滤波过程通过提升小波方式实现．为提高编码效率，对运动连接的像素进行分类，分别自适应地选择滤波器系数．给出了基于零系数聚类特性的变零块系数编码方法，以四叉树结构表达零块，大大提高了编码效率．与其他几种可伸缩视频编码方法相比，该方法不仅实现了完全可伸缩性，而且具有更高的编码性能，是一种较好的适应网络传输特点的视频编码方法．
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| 关 键 词： | 视频编码 小波 完全可伸缩 时间滤波 自适应 |
| 文章编号： | 1671-4512（2005）09-0009-04 |
| 收稿时间： | 2005-05-09 |
| 修稿时间： | 2005年5月9日 |
Fully scalable video codec based on wavelet |
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| Tan Yihua,Tian Jinwen,Liu Jian,Zhu Guangxi.Fully scalable video codec based on wavelet[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2005,33(9):9-12. |
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| Authors: | Tan Yihua Tian Jinwen Liu Jian Zhu Guangxi |
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| Abstract: | A wavelet based video coding method was proposed to achieve a full scalability for network transmission. Firstly, the motion invertible time filtering done by lift style was implemented along the time direction. Secondly, to improve the coding efficiency, the filter coefficients of each pixel were adaptively selected according to the result of the motion-connected pixels classification. Thirdly, a coding method with variable size of zero coefficient blocks, in which the zero blocks is represented by quasi-tree to utilize the cluster property, was devised to improve coding efficiency. Compared with the other scalable codecs, the proposed method not only obtains fully scalable property but also has superior performance. The proposed method is a good video codec meeting the requirements of network transmission. |
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| Keywords: | video coding wavelet fully scalable time filtering adaptive |
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