Title :
Frequency warping and subband merging for approximating the critical bands with cosine-modulated filter banks
Author :
Parfieniuk, Marek ; Petrovsky, Alexander ; Wan, Wanggen
Author_Institution :
Dept. of Real-Time Syst., Bialystok Tech. Univ., Bialystok
Abstract :
A novel approach to designing nonuniform cosine-modulated filter banks is presented. Frequency warping and subband merging are used together to obtain more freedom of frequency partitioning, and thus to approximate the critical bands of hearing more accurately. On the other hand, for a given accuracy, different compromises between warping strength and the number of channels can be investigated to minimize the computational complexity of the system.
Keywords :
computational complexity; digital filters; modulation; signal processing; computational complexity; critical band approximation; frequency partitioning; frequency warping; nonuniform cosine-modulated filter banks; subband merging; Auditory system; Delay estimation; Design engineering; Filter bank; Finite impulse response filter; Frequency estimation; Merging; Prototypes; Real time systems; Wavelet transforms;
Conference_Titel :
Audio, Language and Image Processing, 2008. ICALIP 2008. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1723-0
Electronic_ISBN :
978-1-4244-1724-7
DOI :
10.1109/ICALIP.2008.4590274
