peech Enhancement Using Conjugate Symmetric Property of Short Time Fourier Transform

Authors

  • Mahiboob Department of Electronics and Communication Engineering,Basaveshwara Engineering College Bagalkot, India
  • Dr. Shridhar S. K Department of Electronics and Communication Engineering,Basaveshwara Engineering College Bagalkot, India
  • S. R. Bharamagoudar Department of Electronics and Communication Engineering,Basaveshwara Engineering College Bagalkot, India
  • Somashekhar S. Pujar Department of Electronics and Communication Engineering,Basaveshwara Engineering College Bagalkot, India

Keywords:

Speech enhancement, Magnitude spectrum, Phase spectrum, Phase modification.

Abstract

The main objective of speech enhancement is to improve quality and intelligibility. At the same time listener
fatigue should also be reduced. Short Time Fourier Transform (STFT) is employed in the present work. STFT magnitude and
phase spectrum of noisy speech are computed. The magnitude spectrum is kept as it is, whereas phase spectrum is modified
empirically. The modified phase is combined with the unmodified magnitude to get the complex spectrum. The complex
spectrum is converted into time domain signal through inverse STFT. The resulting time domain signal quality and
intelligibility are superior compared to the noisy speech signal. The proposed algorithm is evaluated through subjective
listening tests, objective measures and spectrogram analysis. The results are superior as compared to earlier speech
enhancement methods.

Published

2015-05-25

How to Cite

Mahiboob, Dr. Shridhar S. K, S. R. Bharamagoudar, & Somashekhar S. Pujar. (2015). peech Enhancement Using Conjugate Symmetric Property of Short Time Fourier Transform. International Journal of Advance Engineering and Research Development (IJAERD), 2(5), 1460–1466. Retrieved from https://ijaerd.com/index.php/IJAERD/article/view/1192