A process for the reduction of faults of acoustic signals by means of the adaptive filter - method of spectral subtraction

摘要

A process for the reduction of faults of acoustic signals by means of the adaptive filter - method of spectral subtraction,– in the case of which the noise-affected signals x (k, i) in time segments k and of the discrete frequency i in segments by means of an adaptive filter function h (k, i) to be filtered, and– in the case of which for each time segment k and frequency i a real noise - input - ratio nir (k, i) is determined in such a way,– that it is the case of signals with a low noise, proportion of small values, and– that it is the case of signals with a high interference noise proportion of large values, and– in the case of which the adaptation of the filter function h (k, i) takes place in such a manner,– that for the calculation of the actual characteristic value h (k, i) of the filter function information via an a priori signal - to - rausch - distance be taken into account,characterized by the,– that the characteristic curve of the filter function is divided into two parts and a terminating edge, such,– that the filtering for strongly disturbed signals x (k, i) with a high..