Least squares design of nonuniform filter banks with evaluation in speech enhancement

Author

De Haan, Jan Murk ; Claesson, I. ; Gustafsson, Hurald

Author_Institution

Dept. of Telecommun., Blekinge Inst. of Technol., Ronneby, Sweden

Volume

6

fYear

2003

fDate

6-10 April 2003

Abstract

This paper presents a method for least squares design of nonuniform filter banks for application in subband signal processing. Design objectives aim to optimize the filter bank frequency response while minimizing subband and output aliasing. Aliasing is minimized although magnitude and phase changes affect the aliasing terms. Filter banks with increasing bandwidth are designed with the proposed method and evaluated in speech enhancement using a spectral subtraction algorithm. When using a nonuniform frequency resolution approximating that of the human auditory system it is shown that an increased noise reduction and SNR improvement is achieved while maintaining the speech quality for a fixed number of frequency-bands.

Keywords

channel bank filters; frequency response; least squares approximations; minimisation; signal reconstruction; spectral analysis; speech enhancement; SNR improvement; filter bank frequency response; fixed frequency-bands; human auditory system; least squares design; noise reduction; nonuniform filter banks; nonuniform frequency resolution; optimization; output aliasing minimization; perfect reconstruction filter banks; spectral subtraction algorithm; speech enhancement; speech quality; subband signal processing; Algorithm design and analysis; Bandwidth; Design optimization; Filter bank; Frequency response; Least squares methods; Process design; Signal design; Signal processing algorithms; Speech enhancement;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on

ISSN

1520-6149

Print_ISBN

0-7803-7663-3

Type

conf

DOI

10.1109/ICASSP.2003.1201630

Filename

1201630