The present invention relates to a method for processing an audio signal for spectral refinement of a short-time spectrum of the audio input signal consisting of sub-band short-time spectra, comprising short-time Fourier transforming the audio input signal to obtain the sub-band short-time spectra for a predetermined number of sub-bands, time-delay filtering at least one of the sub-band short-time spectra to obtain a predetermined number of time-delayed sub-band short-time spectra for at least one of the predetermined number of sub-bands, filtering for the at least one of the predetermined number of sub-bands the respective sub-band short-time spectrum and the corresponding time-delayed sub-band short-time spectra by a filtering means, in particular, by a Finite Impulse Response filtering means, to obtain a refined sub-band short-time spectrum for the at least one of the predetermined number of sub-bands.
展开▼
