DocumentCode :
60152
Title :
Exploiting Jump-Resonance Hysteresis in Silicon Auditory Front-Ends for Extracting Speaker Discriminative Formant Trajectories
Author :
Aono, K. ; Shaga, R.K. ; Chakrabartty, Shantanu
Author_Institution :
Dept. of Electr. & Comput. Eng., Michigan State Univ., East Lansing, MI, USA
Volume :
7
Issue :
4
fYear :
2013
fDate :
Aug. 2013
Firstpage :
389
Lastpage :
400
Abstract :
Jump-resonance is a phenomenon observed in non-linear circuits where the amplitude of the output signal exhibits an abrupt jump when the frequency of the input signal is varied. For Gm-C filters used in the design of analog auditory front-ends (AFEs), jump-resonance is generally considered to be undesirable and several techniques have been proposed in literature to avoid or alleviate this artifact. In this paper we explore the use of jump-resonance based hysteresis in Gm-C band-pass filters for encoding speech formant trajectories. Using prototypes of silicon AFEs fabricated in a 0.5 μm CMOS process, we demonstrate the benefits of the proposed approach for extracting speaker discriminative features. These benefits are validated using speaker recognition experiments where consistent improvements in equal-error-rates (EERs) are achieved using the jump-resonance based features as compared to conventional features.
Keywords :
CMOS integrated circuits; band-pass filters; biomedical electronics; feature extraction; hearing; hysteresis; medical signal processing; prototypes; speaker recognition; speech coding; AFE design; CMOS process; EER improvement; Gm-C band-pass filter; Gm-C filter; abrupt amplitude jump; analog auditory front-end; equal-error-rate; input signal frequency variation; jump-resonance hysteresis; nonlinear circuit; output signal amplitude; silicon AFE prototype; silicon auditory front-end; size 0.5 mum; speaker discriminative feature extraction; speaker discriminative formant trajectory extraction; speaker recognition experiment; speech formant trajectory encoding; Band pass filters; Feature extraction; Hysteresis; Silicon; Speaker recognition; Speech; Trajectory; ${rm G}_{m}{mathchar"702D }{rm C}$ filter; jump-resonance; silicon auditory front-ends; speaker recognition; Artifacts; Female; Humans; Male; Nonlinear Dynamics; Probability; Signal Processing, Computer-Assisted; Silicon; Sound Spectrography; Speech;
fLanguage :
English
Journal_Title :
Biomedical Circuits and Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
1932-4545
Type :
jour
DOI :
10.1109/TBCAS.2012.2218104
Filename :
6336801
Link To Document :
بازگشت