A mixed-signal correlator for acoustic transient classification

Author

Edwards, R. Timothy ; Cauwenberghs, Gert ; Pineda, Fernando J.

Author_Institution

Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD, USA

Volume

1

fYear

1997

fDate

9-12 Jun 1997

Firstpage

621

Abstract

Correlation computations are widely used in template-based temporal pattern recognition, but are expensive to compute in real time on DSP systems. We have designed and fabricated a low-power chip which uses current-mode analog circuits to compute the correlation between an auditory input signal in the time-frequency domain and a stored binary template. We use a bucket-brigade device (BED) to accumulate partial column sums over time at rates consistent with the auditory-band input. Experimental results of the correlator demonstrate its correct operation over a wide range of operating frequencies

Keywords

CMOS integrated circuits; acoustic signal processing; correlators; mixed analogue-digital integrated circuits; pattern classification; transient analysis; acoustic transient classification; auditory input signal; bucket-brigade device; current-mode analog circuits; low-power chip; mixed-signal correlator; partial column sums; stored binary template; template-based temporal pattern recognition; time-frequency domain; Acoustical engineering; Analog computers; Correlators; Digital signal processing chips; Equations; Laboratories; Pattern recognition; Physics computing; Real time systems; Time frequency analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on

Print_ISBN

0-7803-3583-X

Type

conf

DOI

10.1109/ISCAS.1997.608882

Filename

608882