Impulsive Sound Detection Directly in Sigma-Delta Domain

• Autorzy: Miranda I. D. dos S. , Lima A. C. de C.

Identyfikatory

DOI

10.1515/aoa-2017-0028

• Języki publikacji: EN

Abstrakty

EN

Recent implementations of Sigma-Delta (ΣΔ) converters have achieved low cost, low power consumption, and high integration while maintaining resolution as high as in Nyquist-rate converters. However, its usage implies demodulating the source signal delivered from ΣΔ modulation to Pulse-Code Modulation (PCM) on a pre-processing stage. This work proposes an algorithm based on Discrete Cosine Transform for impulsive signal detection to be applied directly on a modulated ΣΔ bitstream, targeting to reduce computational cost in acoustic event detection applications such as gunshot recognition systems. From pre-recorded impulsive sounds in ΣΔ format, it has been shown that the new method presents a similar error rate in comparison with traditional energy-based approaches in PCM, meanwhile, it reduces significantly the number of operations per unit time.

Słowa kluczowe

EN

impulsive signal detection; sigma-delta modulation; discrete cosine transform

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2017
• Tom: Vol. 42, No. 2
• Strony: 255--261
• Opis fizyczny: Bibliogr. 17 poz., rys., tab., wykr.

Twórcy

autor

Miranda I. D. dos S.

• Department of Industrial Engineering Postgraduate, Federal University of Bahia, 2 Aristides Novis Street, 6th Floor, Federação, Salvador, Bahia 40.210-630, Brazil

autor

Lima A. C. de C.

• Department of Industrial Engineering Postgraduate, Federal University of Bahia, 2 Aristides Novis Street, 6th Floor, Federação, Salvador, Bahia 40.210-630, Brazil

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).