vt_plt.m

来自「这是一个用于语音信号处理的工具箱」· M 代码 · 共 54 行

% Function : plot the voicetype on figure(Vtset_f) and figure(Vtdis_f) 
%    It has the following features:
%     (1) shifts the display to left by npts when sf_flag=1; The reverse if sf_flag=-1
%     (2) undo the correction, redraw the plot

figure(Vtset_f);
plot_flag=1;
   %--------------%
   % SHIFT EFFECT %
   %--------------%

if exist('sf_flag')
 
   if sf_flag==1  % shift to left
       cfram=max(1,cfram-1);
       set(frame_pts,'String',num2str(cfram));

   elseif sf_flag==-1 % shift to right
       cfram=min(nfram,cfram+1);
       set(frame_pts,'String',num2str(cfram));

   elseif sf_flag==2  % shift to the user specified (typed) frame
       cfram=str2num(get(frame_pts,'String'));
       if cfram>nfram
          cfram=nfram;
          set(frame_pts,'String',num2str(cfram));
       end

       if cfram<1
          cfram=1;
          set(frame_pts,'String',num2str(cfram));
       end
   end

   if vctyp1(cfram)==0
      set(vt_text,'String','unvoiced');
   else
      set(vt_text,'String','voiced');
   end
   clear sf_flag;
end

   %------------------------%
   % plot the voicetype     %
   %------------------------%

plot(1:nfram,vctyp,'b',1:nfram,vctyp1,'r+',cfram,vctyp1(cfram),'go');
xlabel('frame');
title('blue line is the old-voicetype & red ''+'' is the new-voicetype');
nfram=length(vctyp1);
text(nframe/2,1.3, '1=Voiced');
text(nframe/2,-0.3,'0=Unvoiced');
axis([1 nfram -0.5 1.5]);