The Removal of Environmental Noise in Cellular Communications by Perceptual Techniques (1999)
Abstract / truncated to 115 words
This thesis describes the application of a perceptually based spectral subtraction algorithm for the enhancement of non-stationary noise corrupted speech. Through examination of speech enhancement techniques, explanations are given for the choice of magnitude spectral subtraction and how the human auditory system can be modelled for frequency domain speech enhancement. It is discovered, that the cochlea provides the mechanical speech enhancement in the auditory system, through the use of masking. Frequency masking is used in spectral subtraction, to improve the algorithm execution time, and to shape the enhancement process making it sound natural to the ear. A new technique for estimation of background noise is presented, which operates during speech sections as well as pauses. ...
Information
- Author
- Tuffy, Mark
- Institution
- University Of Edinburgh
- Supervisor
- Publication Year
- 1999
- Upload Date
- July 3, 2008
First few pages / click to enlarge
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