Efficient design of narrowband cosine-modulated filter banks using a two-stage frequency-response masking approach

被引：10

作者：

Netto, SL ^{[1
]}

de Barcellos, LCR ^{[1
]}

Diniz, PSR ^{[1
]}

机构：

[1] Fed Univ Rio De Janeiro, Programa Engn Elet, COPPE, BR-21945900 Rio De Janeiro, Brazil

来源：

JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS | 2003年 / 12卷 / 05期

关键词：

frequency-response masking; cosine-modulated filter banks; spectral estimation; filter banks;

D O I：

10.1142/S0218126603001057

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

A new cosine-modulated filter bank (CMFB) structure is proposed based on the frequency-response masking (FRM) approach using masking filter decomposition. The resulting structure, the so-called FRM2-CMFB, presents reasonable computational complexity (number of arithmetic operations per output sample) and allows one to design filter banks with extremely large number of bands. The examples include the use of M = 1024 bands, where the standard minimax method cannot be employed. These examples indicate that the reduction in computational complexity can be as high as 60% of the original FRM-CMFB structure, which does not use masking filter decomposition.

引用

页码：631 / 642

页数：12

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