samples = wavread('onsei3'); nsamples = length(samples); nframes = floor((nsamples-N)/(N/4))+1; samples2D = zeros(N,nframes); for frame=1:nframes ns = 1+(N/4)*(frame-1); ne = N+(N/4)*(frame-1); samples2D(:,frame) = samples(ns:ne); end spectrum2D = zeros(N,nframes); for frame=1:nframes spectrum2D(:,frame) = fft(samples2D(:,frame).*hamming(N)); end mag_fft2D = abs(spectrum2D); arg_fft2D = angle(spectrum2D); spectrum2D = mag_fft2D.*exp(j*arg_fft2D); output2D = zeros(N,nframes); for frame=1:nframes output2D(:,frame) = real(ifft(spectrum2D(:,frame))); output2D(:,frame) = output2D(:,frame).*hamming(N); end output = zeros(nsamples,1); for frame=1:nframes ns = 1+(N/4)*(frame-1); ne = N+(N/4)*(frame-1); output(ns:ne) = output(ns:ne)+output2D(:,frame); end output = output/max(abs(output))*0.95; wavwrite(output, 16000, 'onsei3_enh.wav')
About Keiichi Yasu
音声・音響・聴覚情報処理に興味がある研究者。現在は吃音についての研究を行っている。Linuxを1998年より嗜む。
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