Enhancement of Speech Intelligibility using Binary Mask Based on Noise Constraints
ARamesh Nuthakki1, Sreenivasa Murthy A2
1Ramesh Nuthakki, Research Scholar, Department of Electronics and Communication Engineering, University Visvesvaraya College of Engineering, Bengaluru, India.
2Dr. Sreenivasa Murthy A, Professor, Department of Electronics and Communication Engineering, University Visvesvaraya College of Engineering, Bengaluru, India.
Manuscript received on 4 August 2019. | Revised Manuscript received on 11 August 2019. | Manuscript published on 30 September 2019. | PP: 3509-3516 | Volume-8 Issue-3 September 2019 | Retrieval Number: C5260098319/2019©BEIESP | DOI: 10.35940/ijrte.C5260.098319
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The primary aim of this paper is to examine the application of binary mask to improve intelligibility in most unfavorable conditions where hearing impaired/normal listeners find it difficult to understand what is being told. Most of the existing noise reduction algorithms are known to improve the speech quality but they hardly improve speech intelligibility. The paper proposed by Gibak Kim and Philipos C. Loizou uses the Weiner gain function for improving speech intelligibility. Here, in this paper we have proposed to apply the same approach in magnitude spectrum using the parametric wiener filter in order to study its effects on overall speech intelligibility. Subjective and objective tests were conducted to evaluate the performance of the enhanced speech for various types of noises. The results clearly indicate that there is an improvement in average segmental signal-to-noise ratio for the speech corrupted at -5dB, 0dB, 5dB and 10dB SNR values for random noise, babble noise, car noise and helicopter noise. This technique can be used in real time applications, such as mobile, hearing aids and speech–activated machines.
Keywords: Speech Intelligibility, Noise Estimation, Speech Enhancement, Objective and Subjective Performance Measures, Spectrograms.
Scope of the Article: Signal and Speech Processing