annotate demo_degradations.m @ 4:053a55a91d20

- pimped the demos
- re-added some missing degradation data

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Audio Degradation Toolbox
%
% Centre for Digital Music, Queen Mary University of London.
% This file copyright 2013 Sebastian Ewert, Matthias Mauch and QMUL.
%
% This program is free software; you can redistribute it and/or
% modify it under the terms of the GNU General Public License as
% published by the Free Software Foundation; either version 2 of the
% License, or (at your option) any later version.  See the file
% COPYING included with this distribution for more information.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Note: Some degradations impose a delay/temporal distortion on the input
% data. The last example shows, given time positions before the
% degradation, how the corresponding time positions after the degradation
% can be retrieved

%%

clear

addpath(fullfile(pwd,'AudioDegradationToolbox'));

pathOutputDemo = 'demoOutput/';
if ~exist(pathOutputDemo,'dir'), mkdir(pathOutputDemo); end

filenames = {
    'testdata/RWC_G39.wav';
    'testdata/RWC_G72.wav';
    'testdata/RWC_G84.wav';
    'testdata/RWC_P009m_drum.wav';
    'testdata/RWC-C08.wav';
    };

createSpectrograms = 0;

%%
% just copying original files to the demo folder
for k=1:length(filenames)
    copyfile(filenames{k}, fullfile(pathOutputDemo,sprintf('00_Original_file%d.wav',k)))
    if createSpectrograms
        [f_audio,samplingFreq]=wavread(filenames{k});
        [s,f,t] = spectrogram(f_audio,hamming(round(samplingFreq*0.093)),round(samplingFreq*0.093/2),[],samplingFreq);
        figure; imagesc(t,f,log10(abs(s)+1)); axis xy; colormap(hot); ylim([0,8000]); colorbar; print('-dpng', fullfile(pathOutputDemo,sprintf('00_Original_file%d.png',k)))
    end
end

%%
for k=1:length(filenames)
    [f_audio,samplingFreq]=wavread(filenames{k});
    
    f_audio_out = applyDegradation('liveRecording', f_audio, samplingFreq);
    
    wavwrite(f_audio_out,samplingFreq,16,fullfile(pathOutputDemo,sprintf('Degr_01_liveRecording_file%d.wav',k)));
    if createSpectrograms
        [s,f,t] = spectrogram(f_audio_out,hamming(round(samplingFreq*0.093)),round(samplingFreq*0.093/2),[],samplingFreq);
        figure; imagesc(t,f,log10(abs(s)+1)); axis xy; colormap(hot); ylim([0,8000]); colorbar; print('-dpng', fullfile(pathOutputDemo,sprintf('Degr_01_liveRecording_file%d.png',k)))
    end
end

%%
for k=1:length(filenames)
    [f_audio,samplingFreq]=wavread(filenames{k});
    
    f_audio_out = applyDegradation('strongMp3Compression', f_audio, samplingFreq);
    
    wavwrite(f_audio_out,samplingFreq,16,fullfile(pathOutputDemo,sprintf('Degr_02_strongMp3Compression_file%d.wav',k)));
    if createSpectrograms
        [s,f,t] = spectrogram(f_audio_out,hamming(round(samplingFreq*0.093)),round(samplingFreq*0.093/2),[],samplingFreq);
        figure; imagesc(t,f,log10(abs(s)+1)); axis xy; colormap(hot); ylim([0,8000]); colorbar; print('-dpng', fullfile(pathOutputDemo,sprintf('Degr_02_strongMp3Compression_file%d.png',k)))
    end
end

%%
for k=1:length(filenames)
    [f_audio,samplingFreq]=wavread(filenames{k});
    
    f_audio_out = applyDegradation('vinylRecording', f_audio, samplingFreq);
    
    wavwrite(f_audio_out,samplingFreq,16,fullfile(pathOutputDemo,sprintf('Degr_03_vinylRecording_file%d.wav',k)));
    if createSpectrograms
        [s,f,t] = spectrogram(f_audio_out,hamming(round(samplingFreq*0.093)),round(samplingFreq*0.093/2),[],samplingFreq);
        figure; imagesc(t,f,log10(abs(s)+1)); axis xy; colormap(hot); ylim([0,8000]); colorbar; print('-dpng', fullfile(pathOutputDemo,sprintf('Degr_03_vinylRecording_file%d.png',k)))
    end
end

%%
for k=1:length(filenames)
    [f_audio,samplingFreq]=wavread(filenames{k});
    
    f_audio_out = applyDegradation('radioBroadcast', f_audio, samplingFreq);
    
    wavwrite(f_audio_out,samplingFreq,16,fullfile(pathOutputDemo,sprintf('Degr_04_radioBroadcast_file%d.wav',k)));
    if createSpectrograms
        [s,f,t] = spectrogram(f_audio_out,hamming(round(samplingFreq*0.093)),round(samplingFreq*0.093/2),[],samplingFreq);
        figure; imagesc(t,f,log10(abs(s)+1)); axis xy; colormap(hot); ylim([0,8000]); colorbar; print('-dpng', fullfile(pathOutputDemo,sprintf('Degr_04_radioBroadcast_file%d.png',k)))
    end
end

%%
for k=1:length(filenames)
    [f_audio,samplingFreq]=wavread(filenames{k});
    
    f_audio_out = applyDegradation('smartPhoneRecording', f_audio, samplingFreq);
    
    wavwrite(f_audio_out,samplingFreq,16,fullfile(pathOutputDemo,sprintf('Degr_05_smartPhoneRecording_file%d.wav',k)));
    if createSpectrograms
        [s,f,t] = spectrogram(f_audio_out,hamming(round(samplingFreq*0.093)),round(samplingFreq*0.093/2),[],samplingFreq);
        figure; imagesc(t,f,log10(abs(s)+1)); axis xy; colormap(hot); ylim([0,8000]); colorbar; print('-dpng', fullfile(pathOutputDemo,sprintf('Degr_05_smartPhoneRecording_file%d.png',k)))
    end
end

%%
for k=1:length(filenames)
    [f_audio,samplingFreq]=wavread(filenames{k});
    
    f_audio_out = applyDegradation('smartPhonePlayback', f_audio, samplingFreq);
    
    wavwrite(f_audio_out,samplingFreq,16,fullfile(pathOutputDemo,sprintf('Degr_06_smartPhonePlayback_file%d.wav',k)));
    if createSpectrograms
        [s,f,t] = spectrogram(f_audio_out,hamming(round(samplingFreq*0.093)),round(samplingFreq*0.093/2),[],samplingFreq);
        figure; imagesc(t,f,log10(abs(s)+1)); axis xy; colormap(hot); ylim([0,8000]); colorbar; print('-dpng', fullfile(pathOutputDemo,sprintf('Degr_06_smartPhonePlayback_file%d.png',k)))
    end
end

%%
% Some degradations delay the input signal. If some timepositions are given
% via timepositions_beforeDegr, the corresponding positions will be returned
% in timepositions_afterDegr. In this case, there is no need for f_audio
% and samplingFreq as above but they could be specified too.
timepositions_beforeDegr = [5, 60];
[~,timepositions_afterDegr] = applyDegradation('radioBroadcast', [], [], timepositions_beforeDegr);
fprintf('radioBroadcast: corresponding positions:\n');
for k=1:length(timepositions_beforeDegr) fprintf('%g -> %g\n',timepositions_beforeDegr(k),timepositions_afterDegr(k)); end