Title :
Noise suppression system integration using an analog allpass filter bank
Author :
Rinne, M. ; Jarske, T. ; Tenhunen, H. ; Vainio, O. ; Neuvo, Y.
Author_Institution :
Radio Commun., Nokia Res. Center, Helsinki, Finland
fDate :
30 Apr-3 May 1995
Abstract :
A new method to enhance the quality of a telephone connection by suppressing noise and disturbances in speech signals is presented. As the noise is evenly spread over the entire signal band, a nonlinear filtering algorithm is required to improve the signal-to-noise-ratio. The system is being realized as an analog full custom ASIC using switched capacitor (SC)-substructures and CMOS-technology. The advantages of the analog implementation include low power consumption, small integration area and inexpensiveness of the chip. In this paper, the noise suppression algorithm is described and the SC-circuit implementation is presented
Keywords :
CMOS analogue integrated circuits; all-pass filters; application specific integrated circuits; interference (signal); interference suppression; nonlinear filters; speech processing; switched capacitor networks; telephone interference; telephony; voice communication; CMOS technology; analog allpass filter bank; analog full custom ASIC; integration area; noise suppression system; nonlinear filtering algorithm; power consumption; signal-to-noise-ratio; speech signals; switched capacitor substructures; telephone connection; Circuit noise; Filter bank; Finite impulse response filter; Frequency conversion; Frequency synthesizers; Signal processing algorithms; Speech analysis; Speech enhancement; Speech synthesis; Transfer functions;
Conference_Titel :
Circuits and Systems, 1995. ISCAS '95., 1995 IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2570-2
DOI :
10.1109/ISCAS.1995.520361
