| MPEG-4形状编码研究 |
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| 引用本文： | 刘云鹏.MPEG-4形状编码研究[J].浙江万里学院学报,2006,19(5):26-29. |
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| 作者姓名： | 刘云鹏 |
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| 作者单位： | 浙江万里学院,宁波,315100 |
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| 摘 要： | MPEG-4标准实现了从基于像素的编码向基于对象和内容的编码的转变．标准中引入了视频对象平面（VOP）的概念，每个VOP即是一个语义意义上的对象或感兴趣的对象内容，VOP具有形状、纹理和运动三种属性，其中形状编码是MPEG-4与传统视频编码标准的最大区别．通过对MPEG-4的研究探讨，提出一种基于边缘轮廓的形状编码方法：改进的Freeman链码法，将它与传统的链码方法从码长、链码长度、是否独立于旋转操作、链码总位数四个方面进行了比较，给出比较分析结果．
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| 关 键 词： | 形状编码 链码 |
| 文章编号： | 1671-2250（2006）05-0026-04 |
| 收稿时间： | 2006-03-22 |
| 修稿时间： | 2006年3月22日 |
Research on MPEG-4 Shape Coding |
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| LIU Yun-peng.Research on MPEG-4 Shape Coding[J].Journal of Zhejiang Wanli University,2006,19(5):26-29. |
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| Authors: | LIU Yun-peng |
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| Abstract: | MPEG-4 video compression standard changes the traditional video coding into the new one based on video object and video information. Because of the new concept of VOP. MPEG-4 provides the manipulation of video object. One VOP is one semantic object with the attribute of shape, texture and motion. Among them shape coding is the main difference between MPEG-4 and the traditional standard, A contour-based method -- improved Freeman chain coding is discussed. We compare code length, chain letagth, rolling operation, and whole chain bits with the traditional coding, and provide the results of comparison analysis. |
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| Keywords: | MPEG-4 Freeman |
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