IMPLEMENTING A NOISE CANCELLATION SYSTEM WITH THE TMS320C31

This paper is concerned with the digital implementation of

spectral subtraction modified algorithm on a Texas Instruments (TI(TM))

TMS320C31 Digital Signal Processor (DSP). The algorithm was

developed to suppress a car noise in speech picked up by one

microphone in a running car for application in mobil hand-free

telephony. The real-time implementation on floating-point processor

is described. The speech activity detector is a limiting part of one

channel spectral subtraction algorithm. In implemented version of

program the cepstral speech/pause detector was used.

This document was part of the first European DSP Education and

Research Conference that took place September 26 and 27, 1996 in

Paris. For information on how TI encourages students from around

the world to find innovative ways to use DSPs, see TI's World Wide

Web site at www.ti.com.

*DISCLAIMER: This document was part of the DSP Solution Challenge

1995 European Team Papers. It may have been written by someone

whose native language is not English. TI assumes no liability

for the quality of writing and/or the accuracy of the information

contained herein.

Go to the Engineering Design Center to locate information on other TI Semiconductor devices.

(c) Copyright 1998 Texas Instruments Incorporated. All rights reserved.
Trademarks, Important Notice!