| 摘要 |
<p>The invention concerns a method which is applied to a noise abatement process of a sound signal starting with a digitisation followed by a splitting (4a, 4b) of the noisy signals (u(t) into two frame sequences. The frames (Tei) of the first sequence are all identical. The first frame of the second sequence has a length equal to a half-frame, the other frames (T'ei) being of the same length as those of the first sequence (Tei), so as to obtain a half-frame shift. The frames of each sequence (Tei, Tei) are noise-corrected by applying a Fourier transform (50a, 50b), a Wiener filtering (51a, 51b), and an inverse Fourier transform (52a, 52b). It consists in weighting the frames of the two sequences (60a, 60b) through a cosine window and summing them (61) so as to reconstruct the noise-free signals (s'(t).</p> |
