A Perceptual Approach to Reduce Musical Noise Using Critical Bands Tonality Coefficients and Masking Thresholds
Ch. V. Rama Rao, M. B. Rama Murthy, K. Srinivasa Rao
DOI: 10.4236/ijcns.2009.28085   PDF    HTML     5,927 Downloads   10,470 Views   Citations


Traditional noise reduction techniques have the drawback of generating an annoying musical noise. A new scheme for speech enhancement in high noise environment is developed by considering human auditory system masking characteristics. The new scheme considers the masking threshold of both noisy speech and the denoised one, to detect musical noise components. To make them inaudible, they are set under the noise masking threshold. The improved signal is subjected to extensive subjective and objective tests. It is ob-served that the musical noise is appreciably reduced even at very low signal to noise ratios.

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C. Rama Rao, M. Rama Murthy and K. Srinivasa Rao, "A Perceptual Approach to Reduce Musical Noise Using Critical Bands Tonality Coefficients and Masking Thresholds," International Journal of Communications, Network and System Sciences, Vol. 2 No. 8, 2009, pp. 742-745. doi: 10.4236/ijcns.2009.28085.

Conflicts of Interest

The authors declare no conflicts of interest.


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