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IEEE Trans Biomed Circuits Syst. 2013 Aug;7(4):389-400. doi: 10.1109/TBCAS.2012.2218104.

Exploiting jump-resonance hysteresis in silicon auditory front-ends for extracting speaker discriminative formant trajectories.

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Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI 48823 USA.


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 [Formula: see text] 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 [Formula: see text] 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.

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