De-quantization Audio Signal
5 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
This my audio record code and quantization code :
%record code
Fs = 1000;
nBits = 8;
nChannels = 1;
t = 3;
recObj = audiorecorder(Fs,nBits,nChannels);
set(handles.edit4,'String','Start Record');
recordblocking(recObj,t);
set(handles.edit4,'String','Finish');
myRecording = getaudiodata(recObj);
axes(handles.axes1)
plot(myRecording);
grid on;
title('Record Signal')
set(gca, 'YLim', [-2 2])
legend('Audio Signal');
handles.Fs = Fs;
handles.myRecording = myRecording;
guidata(hObject,handles);
soundsc(myRecording, Fs);
%quantization code
normal_sound = (myRecording - min(myRecording))./(max(myRecording)-min(myRecording));
level = 255;
range = 1/level;
quantized_sound = floor(normal_sound ./ range);
My question is how to do de-quantization based on my quantization code? Thanks before
0 Commenti
Risposte (1)
Pavel Zaviska
il 15 Apr 2021
Hi, several algorithms for Audio dequantization based on signal sparsity have been proposed in the paper "Audio Dequantization Using (Co)Sparse (Non)Convex Methods". The MATLAB source codes are freely available on Github: https://github.com/zawi01/audio_dequantization
Even though the quantization scheme used in the paper is slightly different (standard Mid-riser quantizer), the codes can be easily edited (especially the projection functions) to work for arbitrary quantization scheme, assuming that quantization levels are known.
0 Commenti
Vedere anche
Categorie
Scopri di più su Multirate Signal Processing in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!