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Journal of Emerging Trends in Computing and Information Sciences >> Call for Papers Vol. 8 No. 3, March 2017

Journal of Emerging Trends in Computing and Information Sciences

Design and Implementation of Non Real Time and Real Time Digital Filters for Audio Signal Processing

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Author Pranab Kumar Dhar, Mohammand Ibrahim Khan
ISSN 2079-8407
On Pages 149-155
Volume No. 2
Issue No. 3
Issue Date March 01, 2011
Publishing Date March 01, 2011
Keywords Digital Signal Processor, FIR Digital Filter.


Abstract

An analog active filter can not provide a very sharp cut-off for both higher and lower frequency component, while a digital signal processor (DSP) using digital filter effectively reduces the unwanted higher or lower frequency components within an audio signal. In this paper, we present the design and implementation of non real time and real time digital filter for audio signal. Experimental results indicate that digital filters including low-pass, high-pass and band-pass effectively eliminate both low and high frequency components contained in human voice, providing high quality voice. The performances of these implemented digital filters are evaluated both by listening the filtered output and also by analyzing the frequency response curves.  

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