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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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.

Key words： TDAC Cosine Modulated Filter（CMF） bank Nonuniform filter bank Audio coding

Received: 28 January 2002

PACS:

TN713

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	Pan Xingde
	Guo Jun

Cite this article:

Pan Xingde,Guo Jun. The equivalence of time-analysis and frequency-analysis of the cosine modulated filter bank and its application[J]. , 2003, 25(5): 619-625 .

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http://jeit.ie.ac.cn/EN/ OR http://jeit.ie.ac.cn/EN/Y2003/V25/I5/619