| MPEG-4中静止图像编码方法的探索与研究 |
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| 引用本文： | 娄东升. MPEG-4中静止图像编码方法的探索与研究[J]. 中国传媒大学学报, 2002, 9(4): 49-55. DOI: 10.3969/j.issn.1673-4793.2002.04.007 |
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| 作者姓名： | 娄东升 |
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| 作者单位： | 北京广播学院,电子信息工程系,北京,100024 |
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| 摘 要： | 在静止图像编码方法中,最著名且应用最广泛的就算是JPEG了,JPEG中所用到的主要技术就是离散余弦变换(DCT)和Huffman熵编码;在最新的视频图像压缩标准MPEG-4中,对于静止图像和纹理的编码,都放弃了DCT变换而代之以离散小波变换(DWT).JPEG2000中也同样的以DWT取代了DCT.本文比较JPEG和MPEG-4所分别编码的图像,并具体说明MPEG-4中静止图像的编码过程.最后得出DWT变换相对于DCT变换的优势结论.
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| 关 键 词： | JPEG MPEG-4 静止图像编码 DCT变换 DWT变换 |
| 文章编号： | 1007-8819(2002)04-0049-07 |
| 修稿时间： | 2002-04-22 |
Research on Still Image Coding Method in MPEG-4 |
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| LOU Dong-sheng. Research on Still Image Coding Method in MPEG-4[J]. Journal of Communication University of China Science and TEchnology, 2002, 9(4): 49-55. DOI: 10.3969/j.issn.1673-4793.2002.04.007 |
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| Authors: | LOU Dong-sheng |
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| Abstract: | Of coding methods about still image,JPEG is widely used and has had a good effect,in which the main technologies is DCT transform and Huffman entropy coding.But in latest international video compression standard such as MPEG-4 and JPEG2000,DCT transform is replaced by DWT transform.In this paper,firstly we'll compare DWT's advantage with DCT,then we'll show the course of still image coding in MPEG-4,finally we'll receive conclusion by comparing the images coded by JPEG and MPEG-4. |
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| Keywords: | JPEG MPEG-4 Still Image Coding DCT DWT |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
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