A kepstrum approach to real-time speech enhancement : thesis for the degree of Doctor of Philosophy, Information Engineering, Institute of Technology and Engineering, Massey University at Albany
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Date
2007
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Massey University
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Abstract
This research is mainly concerned with a robust method for an improved performance of a real-time speech enhancement and noise cancellation in a real reverberant environment. Therefore, the thesis titled, "A Kepstrum Approach to Real-Time Speech Enhancement" presents an application technique of a kepstrum method to a speech enhancement method. The kepstrum approach is based on a fundamental theory of kepstrum analysis, which gives a mathematical construct to the application of a speech enhancement. kepstrum analysis is applied to the system identification application of unknown acoustic transfer functions between two microphones. This kepstrum method provides a mathematical representation with FFT based processing and is independent of acoustic path model order. The front-end application of the kepstrum method to speech enhancement methods provides an improved performance in speech enhancement and noise cancellation with several favourable effects.
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Conference proceedings (I)
J. Jeong, and T.J. Moir, "Kepstrum approach to real-time speech enhancement methods
using two microphones", Proceedings of the International Conference on Sensing
Technology (ICST), pp 691-695, November 21-23, 2005, Palmerston North, New
Zealand
Conference proceedings (II)
J. Jeong and T. J. Moir, "Two-microphone kepstrum approach to real-time speech
enhancement methods" Proceedings of the IEEE International Conference on
Engineering of Intelligent Systems (ICEIS), pp 392-397, April 22-23, 2006, Islamabad,
Pakistan
Conference proceedings (III)
T. J. Moir and J. Jeong, "Identification of non-minimum phase transfer function
components" Proceedings of the IEEE International Symposium on Signal Processing
and Information Technology (ISSPIT), pp 380-384, August 27-30, 2006, Vancouver,
Canada
Keywords
Noise cancellation, Speech signal, Acoustic transfer