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voicenc_scc.m
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voicenc_scc.m
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%function voicenc(input);
close all
input = [];
path = 'wavs\';
names = dir([path '*.wav']);
nfiles = size(names,1);
Tntsc = 1/60;
% voicebox('rapt_tframe',Tntsc);
% voicebox('rapt_tlpw',Tntsc/2);
% voicebox('rapt_tcorw',Tntsc*0.75);
% v_voicebox('dy_spitch',0.4);
FFS = 22050;
Wl = 32;
fid_p = fopen('data\all_data_files_periods.asm','w');
fid_w = fopen('data\all_data_files_waves.asm','w');
SCCI = [];
TPI = [];
Nbk = zeros(1,nfiles);
%nfiles = 5;
for ii = 1:nfiles
fprintf('file#%d %s\n',ii-1,names(ii).name);
name = [ path names(ii).name ];
[Y,FS] = audioread(name);
if size(Y,2)>1
X = (Y(:,1)+Y(:,2));
else
X = (Y);
end
[P, Q] = rat(FFS/FS);
X = resample(X,P,Q);
FS = FFS;
CX = v_zerotrim(round(256*X))/256; % 8 bit version without ending zeros
X = CX;
% X = CX + randn(size(CX))*max(abs(CX))/64;
Nntsc = fix(Tntsc*FS);
figure;
[fx,tp,pv,fv] = v_fxpefac(X,FS,Tntsc,'G');
% [fx,tp,pv,fv] = v_fxpefac(X,FS,Tntsc);
% [ffx,ttt] = v_fxrapt(X,FS);
Nblk = length(fx);
Nbk(ii) = Nblk;
YY = zeros((Nblk)*Nntsc,1);
XX = zeros((Nblk)*Nntsc,1);
SCC = zeros(Nblk,Wl);
Ndft = 2^16;
for i=1:Nblk
ns = round((tp(i)-Tntsc/2)*FS);
tti = (ns):(ns+Nntsc-1); % choose one window
s = [CX(tti); CX(tti); CX(tti);]; % same window 3 times to avoid edge effects
XX(((i-1)*Nntsc+1):(i*Nntsc)) = CX(tti);
if (fx(i)>max([1/Tntsc, 3579545/(32*2^12)]))
if (pv(i)<=0.05)
XF = abs(fft(s,Ndft)); % for unvoiced segments use the frequency peak
[~,j] = max(XF(1:(Ndft/2)));
fx(i) = max(1/Tntsc,(j-1)/Ndft*FS/Wl);
[P, Q] = rat(fx(i)*Wl/FS);
ss = resample(s,P,Q); % interpolate 3 windows
sx = round(Tntsc*fx(i)*Wl);
dx = round(2*Tntsc*fx(i)*Wl);
np = fix((dx-sx)/Wl);
ss = ss((sx+1):(sx+Wl));
else % for voiced segments use the pitch
[P, Q] = rat(fx(i)*Wl/FS);
ss = resample(s,P,Q); % interpolate 3 windows
sx = round(Tntsc*fx(i)*Wl);
dx = round(2*Tntsc*fx(i)*Wl);
np = fix((dx-sx)/Wl);
ss = mean(reshape(ss((sx+1):(sx+np*Wl)),Wl,np),2);
end
% kk = 1+fix(rem(Tntsc,1/fx(i))*fx(i)*Wl);
% [~,kk] = min(abs(SCC(i-1,kk)-ss));
% SCC(i,:) = [ss(kk:end); ss(1:(kk-1))]';
SCC(i,:) = ss';
y = resample(repmat(SCC(i,:),1,np+2),Q,P);
else
fx(i) = 0;
SCC(i,:) = zeros(1,Wl);
y = zeros(1,Nntsc);
end
YY(((i-1)*Nntsc+1):((i)*Nntsc)) = y(1:Nntsc);
end
SCCI = [ SCCI; SCC];
figure('Name',names(ii).name)
subplot(2,1,1)
plot((1:size(XX,1))/FS,XX,'b.-',(1:size(YY,1))/FS,YY,'r.-');
legend('Org','Rec');
subplot(2,1,2)
plot(tp,fx,'c');
legend('pitch');
% subplot(3,1,3)
% plot(ffx)
% legend('pitch apt');
figure;
spectrogram(XX,kaiser(Nntsc,8),fix(Nntsc/2),(0:1:FS/2),FS)
title('Original');
figure;
spectrogram(YY,kaiser(Nntsc,8),fix(Nntsc/2),(0:1:FS/2),FS)
title('Encoded');
% obj = audioplayer(XX,FS);
% playblocking(obj);
% obj = audioplayer(YY,FS);
% playblocking(obj);
[SNR,glo] = snrseg(YY,XX,FS,'Vq',Tntsc);
disp(SNR)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% write output
% MSX SCC
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
TP = uint16(3579545./(32*fx)-1);
TP(TP>2^12-1) = 2^12-1;
%TP = bitand(uint16(3579545./(32*fx)-1),2^12-1);
TPI = [TPI; TP];
data = round(SCC/(max(max(abs(SCC))))*127);
i = find(data<0);
data(i) = data(i)+256;
data = uint8(data);
fprintf(fid_p,' CODE\nperiod%d:\n dw ',ii);
for j = 1:Nblk-1
fprintf(fid_p,'0x%s,',dec2hex(TP(j),4));
end
fprintf(fid_p,'0x%s\n',dec2hex(TP(end),4));
fprintf(fid_p,' dw -1 ; frame terminator \n');
fprintf(fid_w,' CODE\n');
fprintf(fid_w,'data%d:\n',ii);
for i = 1:Nblk
fprintf(fid_w,' db ');
for j = 1:31
fprintf(fid_w,'0x%s,',dec2hex(data(i,j),2));
end
fprintf(fid_w,'0x%s\n',dec2hex(data(i,32),2));
end
end
fclose(fid_p);
fclose(fid_w);
fid = fopen('data\all_data_files_index.asm','w');
for ii = 1:nfiles
fprintf(fid,' ; %s\n',names(ii).name);
fprintf(fid,' db data%d / 02000h+1,:period%d\n',ii,ii); % warning: data start at page 4!
fprintf(fid,' dw 06000h+(data%d & 01FFFh),period%d\n',ii,ii);
end
fprintf(fid,'nfiles: equ %d \n\n',nfiles);
fclose(fid);
!make.bat
fclose all;
%% Waveform Compression
%
codebook = 2^12;
disp('codebook:'); disp(codebook);
nc = min(size(SCCI,1),codebook);
[IDX, C] = kmeans(SCCI, nc);
Cdata = round(C/(max(max(abs(C))))*127);
i = find(Cdata<0);
Cdata(i) = Cdata(i)+256;
Cdata = uint8(Cdata);
fid_p = fopen('data\compressed_data.asm','w');
fprintf(fid_p,' ; dw period,wavenumber \n\n');
for ii = 1:nfiles
fprintf(fid_p,' ; %s\n',names(ii).name);
t = sum(Nbk(1:ii-1));
ID = IDX(t+1:t+Nbk(ii));
TP = TPI(t+1:t+Nbk(ii));
fprintf(fid_p,' CODE\n');
fprintf(fid_p,'sample%d:\n',ii);
for j = 1:Nbk(ii)-1
fprintf(fid_p,' dw 0x%s,',dec2hex(TP(j),4));
fprintf(fid_p,'0x%s\n',dec2hex(ID(j)-1,4));
end
fprintf(fid_p,' dw 0x%s,',dec2hex(2^15+TP(end),4));
fprintf(fid_p,'0x%s\n',dec2hex(ID(end),4));
% fprintf(fid_p,' dw 0x%s,',dec2hex(2^15,4));
% fprintf(fid_p,'0x%s\n',dec2hex(2^15,4));
end
fclose(fid_p);
fid_w = fopen('data\compressed_data_waves.asm','w');
for i = 1:size(Cdata,1)
fprintf(fid_w,' db ');
for j = 1:31
fprintf(fid_w,'0x%s,',dec2hex(Cdata(i,j),2));
end
fprintf(fid_w,'0x%s\n',dec2hex(Cdata(i,32),2));
end
fclose(fid_w);
fid = fopen('data\compressed_files_index.asm','w');
for ii = 1:nfiles
fprintf(fid,' ; %s\n',names(ii).name);
fprintf(fid,' db ');
fprintf(fid,':sample%d+sample%d/0x2000-3\n',ii,ii);
fprintf(fid,' dw ');
fprintf(fid,'0x6000+(sample%d & 0x1FFF)\n',ii);
end
fprintf(fid,'nfiles: equ %d \n\n',nfiles);
fclose(fid);
!make_VQ.bat