| 整数变换及其在H.263中的应用 |
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| 引用本文： | 欧建平,王展,皇甫堪.整数变换及其在H.263中的应用[J].国防科技大学学报,2003,25(6):50-52. |
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| 作者姓名： | 欧建平 王展 皇甫堪 |
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| 作者单位： | 国防科技大学电子科学与工程学院,湖南,长沙,410073 |
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| 摘 要： | 针对H.263视频编码标准的DCT变换有运算量大、截尾误差等特点,在提升格式的基础上,采用整数变换代替浮点DCT,并且对相应的量化器加以调整,设计了一种适宜于H.263的整数变换。并将这种整数DCT、浮点DCT和定点DCT在结构和性能上进行比较分析,证实其具有消除浮点运算、减少运算量的特点,并且有很好的压缩效果。
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| 关 键 词： | H.263 提升格式 整数变换 量化 |
| 文章编号： | 1001-2486(2003)06-0050-03 |
| 收稿时间： | 4/5/2003 12:00:00 AM |
| 修稿时间： | 2003年4月5日 |
Integer Transform and Its Application in H.263 |
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| OU Jianping,WANG Zhan and HUANGFU Kan.Integer Transform and Its Application in H.263[J].Journal of National University of Defense Technology,2003,25(6):50-52. |
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| Authors: | OU Jianping WANG Zhan and HUANGFU Kan |
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| Institution: | College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China |
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| Abstract: | Great capacity of operations and truncation error are the shortcomings of DCT in video codec recommendation (H.263). An integer transform that is suitable for H.263 is designed based on lifting scheme, float-point DCT being replaced by integer DCT,and the measure of quantization being modified. The structure and performance are compared among integer transform?float-point DCT and fixed-point DCT,showing that integer transform is a nice transform with the advantage of perfect compression effect, free of float-point operations and fewer arithmetic operations. |
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| Keywords: | H 263 lifting scheme integer transform quantization |
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