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IJEETC 2022 Vol.11(5): 363-372
doi: 10.18178/ijeetc.11.5.363-372

Speech Enhancement in Wireless Communication System Using Hybrid Spectral-Kalman Filter

Olawole E. Toyin 1, Akande D. Oluwole 2, and Adeyemo Z. Kayode2
1. Computer Engineering, University of Ilorin, Ilorin, Nigeria
2. Electronic and Electrical Engineering, Ladoke Akintola University of Technology, Ogbomosho, Nigeria

Abstract—Speech enhancement is of paramount importance in improving the intelligibility and audibility of speech signals in an uncontrolled noisy environment over wireless communication systems. However, the existing techniques used to achieve this such as spectral subtraction are characterized by remnant noise or musical note, while Kalman filter which can remove the remnant noise is associated with instability and non-linear characteristics. Therefore, this paper proposes speech enhancement model in noisy environment using hybrid spectral-Kalman filter over wireless communication system. The proposed model was carried out using acquired noisy speech signals by the Samsung Android mobile phone. The phone call was made in an uncontrolled noisy environment. The signal received was processed by the hybrid spectral-Kalman filter which was achieved by using the output speech signal from the spectral subtraction in time domain as the input of the Kalman filter. The proposed hybrid spectral-Kalman filtering technique was evaluated using Signal-to-Noise Ratio (SNR), Mean Square Error (MSE), Perceptual Evaluation of Speech Quality (PESQ) and Short-Time Objective Intelligibility (STOI). Comparison was then performed with the existing techniques and validation was performed using corrupted speech signals obtained from the NOIZEUS corpus data set. The result revealed that the proposed technique performed better than the existing techniques in a noisy environment.
Index Terms—Kalman filter, Mean Square Error (MSE), spectral-Kalman, spectral subtraction, speech enhancement, Signal-to-Noise Ratio (SNR)

Cite: Olawole E. Toyin, Akande D. Oluwole, and Adeyemo Z. Kayode, "Speech Enhancement in Wireless Communication System Using Hybrid Spectral-Kalman Filter," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 11, No. 5, pp. 363-372, September 2022. Doi: 10.18178/ijeetc.11.5.363-372

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