Sound demonstration software for teaching DSP

Author

Zhu, J. Jim ; Johnson, Wyatt

Author_Institution

Dept. of Electr. & Comput. Eng., Louisiana State Univ., Baton Rouge, LA, USA

fYear

1995

fDate

12-14 Mar 1995

Firstpage

450

Lastpage

454

Abstract

The purpose of the paper is to demonstrate how teaching a few key concepts in digital signal processing (DSP) can be made easier and more effective by exploiting the sound capabilities of today´s multimedia computer systems, such as the PC. By using DSP concepts, the audible difference in sound quality of a music clip when downsampled with and without an anti aliasing filter can be explained to the students. By the same token, it is easy to explain the difference in quality of an upsampled sound signal when used with and without an interpolation filter. MATLAB (Version 4.2c) is used because of its ease of use, and cross platform portability. Sound data files are read in, processed, and then saved. It is then possible to hear the difference between signals either using MATLAB itself or using an appropriate sound tool

Keywords

antialiasing; audio signals; audio systems; computer aided instruction; computer science education; digital filters; multimedia computing; signal processing; teaching; DSP; MATLAB; PC; anti aliasing filter; cross platform portability; digital signal processing; interpolation filter; multimedia computer systems; music clip; sound data files; sound demonstration software; sound quality; sound tool; teaching; upsampled sound signal; Band pass filters; Bandwidth; Digital signal processing; Education; Filtering; Finite impulse response filter; Fourier transforms; Frequency; Sampling methods; Terminology;

fLanguage

English

Publisher

ieee

Conference_Titel

System Theory, 1995., Proceedings of the Twenty-Seventh Southeastern Symposium on

Conference_Location

Starkville, MS

ISSN

0094-2898

Print_ISBN

0-8186-6985-3

Type

conf

DOI

10.1109/SSST.1995.390541

Filename

390541