Author(s): Sureshkumar Natarajan
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Volume. 6 - Issue. 01 , February - 2017
In the field of Digital signal processing, the filter plays a vital role to remove unwanted component and to keep only the desired signal. During the transmission of speech signal through the channel, noise which is random in nature will get superimpose with the original signal and to remove those noise from the signal, and also to extract the useful information from the signal, filters are used. Various applications of filter include for example: in audio processing, video processing, image enhancement, pattern recognition, and in the field of biomedical signal processing to analyze heart related problems such ECG signal, to analyze brain related problems such EEG signal and EMG signal filtering is used for extracting useful information from muscles. For military applications radar and sonar processing is used. In the field of instrumentation/control, data compression, noise reduction is possible by using filter. In this paper, comparison of different digital filter such as Butterworth filter, Chebyshev type I & II filter and Elliptic filter have been experimented by using MATLAB software. In this paper, low pass, high pass, band pass and band stop of the above mentioned filter is experimented and also impulse responses, magnitude responses, phase responses and pole-zero plot of Butterworth, Chebyshev type I & II filter and Elliptic filter is observed for Speech Signal Analysis.
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