Removal of Pink Noise from Corrupted Speech Signal using Kalman Filter
Mohammed Abrar Ahmed1, Malaya Kumar Hota2

1Mohammed Abrar Ahmed, ECE department, Vellore Institute of Technology, Vellore, India.
2Dr. Malaya Kumar Hota, Professor, Department of communication Engineering, School of Electronics Engineering, Vellore Institute of Technology, Vellore, India.
Manuscript received on January 16, 2020. | Revised Manuscript received on January 23, 2020. | Manuscript published on February 10, 2020. | PP: 2034-2038 | Volume-9 Issue-4, February 2020. | Retrieval Number: C8578019320/2020©BEIESP | DOI: 10.35940/ijitee.C8578.029420
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Abstract: Speech enhancement has been a major challenge in the field of Signal processing. The process of filtering the noise component from the speech signal has achieved many milestones since the early 20th century. Beside many theories Linear prediction coding is one of the best methods for speech, audio signal processing which uses the algorithm of predicting the current estimates based on the past states of an LTI system. Linear prediction is usually used in Speech recognition, Speech enhancement. One of such Kalman filter was introduced and described in 1960 by Rudolf Kalman, which uses the concept of linear quadratic estimation. Kalman filtering is effectively being used in the practical applications like navigation of ships or aircraft, designing motion planning algorithms, in communication area. Kalman filters use the autoregression model of speech for the recursive equations of Kalman filter used in state space model of filter for state estimation. In this paper, we have used Kalman filter to eliminate the pink noise from the corrupted speech signal. Pink noise is very common in electronic devices and occurs in almost all devices. The Speech corrupted with pink noise has been obtained from SpEAR database. We have used MATLAB software for the simulation purpose. Finally, Spectrograms of signals are plotted for a better visual understanding of filtered results. 
Keywords: Kalman Filtering, Linear Prediction Coding MATLAB, Noise Removal, Pink Noise, Speech Enhancement.
Scope of the Article: Signal Control System & Processing