An adaptive noise canceller and its implementation on a DSP

Author

Martins, Carlos R. ; Almeida, Teresa M. ; Piedade, Moises S.

Author_Institution

Radiotecnic Dept., ENIDH, Paco d´´Arcos, Portugal

fYear

1990

fDate

1-3 May 1990

Firstpage

1939

Abstract

An adaptive acoustic noise canceller (ANC) is described, and its implementation on a digital signal processor (DSP) is discussed. The system has a primary input for a noisy speech signal and a reference input for the noise. The reference input is adaptively filtered and subtracted from the primary input. Practical considerations regarding the system implementation and the type and localization of the microphones used to capture the signal and the noise are examined. Experimental results showing the good behavior of the system when it is used in different environments are presented

Keywords

acoustic signal processing; adaptive systems; computerised signal processing; interference suppression; signal processing equipment; speech analysis and processing; DSP; acoustic noise canceller; adaptive filtering; adaptive noise canceller; digital signal processor; microphone localisation; noisy speech signal; reference input; Acoustic noise; Adaptive filters; Digital signal processing; Finite impulse response filter; Microphones; Noise cancellation; Signal processing; Speech enhancement; Speech recognition; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1990., IEEE International Symposium on

Conference_Location

New Orleans, LA

Type

conf

DOI

10.1109/ISCAS.1990.112082

Filename

112082