A Perceptual Approach to Reduce Musical Noise Using Critical Bands Tonality Coefficients and Masking Thresholds  

作　　者：Ch. V. Rama Rao M. B. Rama Murthy K. Srinivasa Rao 

机构地区：[1]不详

出　　处：《International Journal of Communications, Network and System Sciences》2009年第8期742-745,共4页通讯、网络与系统学国际期刊（英文）

摘　　要：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.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.

关 键 词：Noise Reduction MUSICAL Noise MASKING THRESHOLD 

分 类 号：R73[医药卫生—肿瘤]