| 提升格式的小波变换及在视频压缩中的应用 |
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| 引用本文： | 刘学勇,王汇源,杨大成. 提升格式的小波变换及在视频压缩中的应用[J]. 信息技术与信息化, 2004, 0(5): 32-34,53 |
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| 作者姓名： | 刘学勇 王汇源 杨大成 |
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| 作者单位： | 北京邮电大学无线通信中心,100826;山东大学信息科学与工程学院,济南,250061;北京邮电大学电信工程学院,100826 |
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| 摘 要： | 提升方法是计算离散小波变换的有效手段，将提升三维小波变换用于视频信号压缩。时间方向小渡变换选用Haar滤波器组，空间小波变换则在常规的图像编码所常用的D9/7滤波器组基础上，对其参数进行调整，进一步减少运算量。实验表明这种调整取得了与D9/7双正交小波基本一致图像编码效果，但提高了运算速度。
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| 关 键 词： | 小波变换 提升格式 视频压缩 |
Lifting Scheme for 3-D Wavelet Transform and its Application to Video Compression |
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| LIU Xue-yong WANG Hui-yuan YANG Da-cheng. Lifting Scheme for 3-D Wavelet Transform and its Application to Video Compression[J]. Information Technology & Informatization, 2004, 0(5): 32-34,53 |
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| Authors: | LIU Xue-yong WANG Hui-yuan YANG Da-cheng |
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| Affiliation: | LIU Xue-yong WANG Hui-yuan YANG Da-cheng |
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| Abstract: | Lifting Scheme can be used t o calculate Discrete Wavelet Transform(DWT) efficiently. In this paper, lifting Sc heme of 3-D DWT is applied to video compression. In time dimension, Haar wavele t filters are used, and optimized parameters of D9/7 wavelet filters which reduc e the calculation is used in spatial wavelet transform. The experimental results presented in this paper show that the compression performance of our improved m ethod is almost the same as the general D9/7 wavelet. But the speed of our meth od is higher than that of general D9/7 wavelet. |
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| Keywords: | Wavelet transform Lifting scheme Video compres sion |
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