Title :
Low delay IIR QMF banks with high perceptive quality for speech processing
Author :
Kleinmann, Thomas ; Lacroix, Arild
Author_Institution :
Inst. fur Angewandte Phys., Frankfurt Univ., Germany
Abstract :
It is well-known that low delay IIR QMF banks induce phase distortions which restrict their suitability for communications, speech processing and audio systems. We describe investigations of the perceptive quality of different IIR QMF bank structures and propose structural means to reduce the subjective perception of phase distortions. The filterbanks are implemented in a special DSP32C signal processor environment enabling the real time processing of sufficiently large speech records
Keywords :
IIR filters; band-pass filters; delays; filtering theory; quadrature mirror filters; speech intelligibility; speech processing; DSP32C signal processor environment; audio systems; communications; filterbanks; high perceptive quality; large speech records; low delay IIR QMF banks; phase distortions; real time processing; speech processing; speech quality; subjective perception; Channel bank filters; Delay; Filter bank; Frequency; IIR filters; Phase distortion; Prototypes; Speech processing; Testing; Tree data structures;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.540407