ADAPTIVE SPEECH BEAMFORMING USING THE TMS320C40 MULTI-DSP

This application report describes the process of designing an adaptive speech beamformer using the Graphical Rapid Prototyping Environment (GRAPE-II). The GRAPE-II environment simplifies programming, compiling, simulation, debugging, and testing of real-time digital signal processor (DSP) algorithms. This project demonstrates the feasibility of this approach by actually designing a functioning beamformer.

A multiprocessor consisting of four Texas Instruments (TI(TM)) TMS320C40 DSP processors, mounted on PC plug-in cards, is used for signal processing. The output of the beamformer is sent to a dual digital-to-analog (D/A) converter. The result is a real-time prototype working at a sampling rate of 8 kHz.

This report includes beamforming theory, broadband filter-and-sum beamforming, implementing the spatial selector algorithm, beamformer design, and a description of the hardware used in the design.

This document was an entry in the 1995 DSP Solutions Challenge, an annual contest organized by TI to encourage students from around the world to find innovative ways to use DSPs. For more information on the TI DSP Solutions Challenge, 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!