首页>
外国专利>
Method of bias compensation for cepstro-temporal smoothing of spectral filter gain
Method of bias compensation for cepstro-temporal smoothing of spectral filter gain
展开▼
机译:用于频谱滤波器增益的倒时平滑的偏差补偿方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
Many speech enhancement algorithms that modify short-term spectral magnitudes of the noisy signal are plagued by annoying spectral outliers that are perceived as musical noise. Techniques can reduce these outliers by means of a temporal smoothing in the cepstral domain. This cepstro-temporal smoothing increases the quality of the enhanced output signal, as it affects only spectral outliers caused by estimation errors, while the speech characteristics are well preserved. However, due to the cepstral transform, the temporal smoothing is done in the logarithmic domain rather than the linear domain, and hence results in a certain bias. Thus, the invention claims a method for a general bias compensation (º G ) for a cepstro-temporal smoothing of spectral filter gain functions that is only dependent on the lower limit (G min ) of the spectral filter-gain function (G). The bias-compensation increases the performance in terms of instrumental measures.
展开▼