Title :
Direct design of nonuniform filter banks
Author :
Nagai, Takayuki ; Futie, Takaaki ; Ikeh, Masaaki
Author_Institution :
Dept. of Electr. Eng., Keio Univ., Yokohama, Japan
Abstract :
In this research, we propose a direct design method of nonuniform filter banks (NUFBs). This method is based on frequency domain constraints to eliminate the amplitude and the aliasing distortions. Both NUFBs with integer and rational sampling factors can be designed with a common procedure. Here, we also consider the design method which requires only to solve linear equations iteratively. In our proposed method, least square errors of the perfect reconstruction (PR) constraints are minimized without using the nonlinear programming technique
Keywords :
band-pass filters; delay circuits; filtering theory; frequency-domain analysis; frequency-domain synthesis; iterative methods; least squares approximations; minimisation; signal reconstruction; signal sampling; aliasing distortion elimination; amplitude distortion elimination; direct design method; frequency domain constraints; integer sampling factors; iterative solutions; least square errors minimisation; linear equations; linear phase filters; nonuniform filter banks; perfect reconstruction constraints; rational sampling factors; Channel bank filters; Cost function; Design methodology; Filter bank; Frequency domain analysis; Least squares methods; Nonlinear distortion; Nonlinear equations; Sampling methods; Speech coding;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on
Conference_Location :
Munich
Print_ISBN :
0-8186-7919-0
DOI :
10.1109/ICASSP.1997.599547
