Patent ID: 9711165
Date: 2017-07-18
CPC Classifications: G10L

Claim:
1. A non-transitory computer readable medium containing computer executable instructions for separating a dry acoustic signal x(t) from a mixture acoustic signal w(t), the mixture acoustic signal w(t) comprising a dry acoustic signal affected by reverberation y(t) and a background acoustic signal z(t), the medium comprising: computer executable instructions for obtaining from the computer readable medium the mixture acoustic signal w(t), the mixture acoustic signal w(t) being an audio data structure comprising the dry acoustic signal affected by reverberation y(t) and the background acoustic signal z(t), the dry acoustic signal affected by reverberation v(t) being an audio data structure comprising the dry acoustic signal x(t) and echoes; computer executable instructions for applying a time-frequency transform to the mixture acoustic signal w(t) to obtain a spectrogram of the mixture acoustic signal V; computer executable instructions to obtain a model of a spectrogram of the mixture acoustic signal {circumflex over (V)} computer executable instructions to produce iteratively an estimation of the model of the spectrogram of the background acoustic signal {circumflex over (V)} computer executable instructions to obtain the spectrogram of the dry acoustic signal by filtering the spectrogram of the mixture acoustic signal V using the estimated model of the spectrogram of the dry acoustic signal {circumflex over (V)} computer executable instructions to obtain the dry acoustic signal x(t) by using an inverse time-frequency transformation on the spectrogram of the dry acoustic signal; and computer executable instructions to store the dry acoustic signal x(t).