Earticle

초록

영어

In this paper, we present a method for duration and spectral shape transformations of speech based on the combination of pyramidal Discrete Wavelet Transform (DWT) and Synchronized Overlap and Addition (SOLA) technique. The developed scheme is devoted to the diagnosis of hearing problems. The SOLA technique is basically used for duration modifications. The pyramidal DWT gives a semi logarithmic frequency decomposition that represents the frequency scales of human hearing. In addition, it allows a separate manipulation of speech sub-bands. In the proposed scheme, we explore the frame synchronization provided by SOLA technique and the frequency reparation given by the DWT to develop simultaneous time-scale and frequency-magnitude transformations. We have compared the developed method to another scheme that uses the same concept in which the frequency decomposition is based on the Cosine Modulated Pseudo- Quadratic Mirror Filter Bank (CMP-QMF). A software system of speech transformations is implemented. Experimental results show that speech waveforms can be successfully modified to different time-scales and frequency-magnitudes with high quality.

목차

Abstract
 1. Introduction
 2. Spectral Shape and Duration Transformations
  2.1. Pyramidal DWT Representation
  2.2. Pyramidal DWT-SOLA
 3. Software Description
 4. Results and Interpretations
 5. Conclusion
 References

키워드

저자

• F. Ykhlef [ Division MultiMedia, Centre de Développement des Technologies Avancées, Algérie ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Advanced Science and Technology

• 간기

  월간

• pISSN

  2005-4238

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605