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

• 作者: Ch. V. Rama Rao K. Srinivasa Rao M. B. Rama Murthy
• 来源期刊: 通讯、网络与系统学国际期刊(英文)
• 学科: 医学
• 关键词: Noise Reduction MUSICAL Noise MASKING THRESHOLD
• 年，卷（期）: 2009,（8）
• 页码范围: 742-745
• 页数: 4页
• 分类号: R73

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.