DSP technology for a hands-free cellular phone in a car

Author

Oh, Stephen

Author_Institution

Texas Instrum. Inc., Dallas, TX, USA

fYear

1996

fDate

25-27 Jun 1996

Firstpage

27

Lastpage

32

Abstract

We present the development results of an acoustic echo canceller (AEC) and adaptive noise suppresser used for hands-free car phones using the Texas Instruments´ TMS320C5x fixed point DSP processor. A hands-free cellular phone using DSP technology provides full-duplex communication with speech enhancement in a noisy car environment. Thus, our AEC system was designed for an adverse car environment. The implementation and design trade-off of an acoustic echo canceller on a 16-bit fixed point DSP microprocessor caused by the automotive environment, are discussed

Keywords

acoustic noise; acoustic signal processing; adaptive signal processing; automobiles; cellular radio; digital arithmetic; digital signal processing chips; echo suppression; land mobile radio; speech enhancement; 16 bit; 16-bit fixed point DSP microprocessor; DSP technology; Texas Instruments TMS320C5x fixed point DSP processor; acoustic echo canceller; adaptive noise suppresser; adverse car environment; automotive environment; car phones; design; full-duplex communication; hands-free cellular phone; implementation; noisy car environment; speech enhancement; Acoustic noise; Cellular phones; Communications technology; Digital signal processing; Echo cancellers; Instruments; Microprocessors; Noise cancellation; Speech enhancement; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Southcon/96. Conference Record

Conference_Location

Orlando, FL

ISSN

1087-8785

Print_ISBN

0-7803-3268-7

Type

conf

DOI

10.1109/SOUTHC.1996.535038

Filename

535038