| 余弦调制滤波器组的时频分析的等价性及其应用 |
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| 引用本文： | 潘兴德,郭军.余弦调制滤波器组的时频分析的等价性及其应用[J].电子与信息学报,2003,25(5):619-625. |
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| 作者姓名： | 潘兴德 郭军 |
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| 作者单位： | 北京邮电大学信息工程学院,北京,100876 |
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| 摘 要： | 该文通过证明 TDAC余弦调制滤波器组时域和频域分析的 PR条件的等价性,建立了 TDAC和 CMF分析技术的内在联系。并针对音频信号处理中往往根据人耳听觉的临界子带特性对信号进行非等带宽滤波,运用已有的一种 CMF非等带宽余弦调制滤波器组构造技术构造了一个 TDAC非等带宽余弦调制滤波器组。
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| 关 键 词： | 时域混叠消除 余弦调制滤波器组 非等带宽滤波器组 音频编码 |
| 收稿时间： | 2002-1-28 |
| 修稿时间： | 2002年1月28日 |
The equivalence of time-analysis and frequency-analysis of the cosine modulated filter bank and its application |
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| Pan Xingde,Guo Jun.The equivalence of time-analysis and frequency-analysis of the cosine modulated filter bank and its application[J].Journal of Electronics & Information Technology,2003,25(5):619-625. |
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| Authors: | Pan Xingde Guo Jun |
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| Affiliation: | Beijing University of Posts and Telecommunications BOX181 Beijing 100876 China |
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| Abstract: | Cosine Modulated Filter(CMF) bank is a kind of broadly used filter bank. By proving the equivalence of the Perfect Reconstruction(PR) conditions of time-analysis and frequency-analysis, the inherent relationship between Time Domain Aliasing Cancellation(TDAC) and CMF is found. By the means, the useful results of the two methods can be conveniently. Finally, a new kind of nonuniform filter bank is built based on TDAC which can be easily modified to audio coding in accord with psychoacoustics. |
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| Keywords: | TDAC Cosine Modulated Filter(CMF) bank Nonuniform filter bank Audio coding |
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