shft.m

来自「这是一个用于语音信号处理的工具箱」· M 代码 · 共 59 行

% Function : shft.m shifts the display sequence by 'npts' points 
%    shifts the display to the left by npts when sf_flag=1; 
%    The shift is the reverse if sf_flag=-1.
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global BACK_COLOR TEXT_COLOR LINE_COLOR;	

   BACK_COLOR=[1 1 1]; %white
	TEXT_COLOR=[0 0 0]; %black
   LINE_COLOR=[0 0 1]; %blue


% get the shift points

npts=str2num(get(shift_pts,'String'));


LENS2=RIGHT-LEFT;

% set the region, [left right]

if sf_flag == 1 % shift to left
        LEFT=max(LEFT-npts,1);
        RIGHT=LEFT+LENS2;
elseif sf_flag == -1 % shift to right
        RIGHT=min(RIGHT+npts,LENS);
        LEFT=RIGHT-LENS2;
end;

if exist('signal1') == 1
axes(ax1);
plot((LEFT:RIGHT),signal1(LEFT:RIGHT),'color',LINE_COLOR);
title('Speech signal 1');
end
if exist('signal2') == 1
axes(ax2);
plot((LEFT:RIGHT),signal2(LEFT:RIGHT),'color',LINE_COLOR);
title('Speech signal 2');
end
if exist('signal3') == 1
axes(ax3);
plot((LEFT:RIGHT),signal3(LEFT:RIGHT),'color',LINE_COLOR);
title('Speech signal 3');
end
if exist('signal4') == 1
axes(ax4);
plot((LEFT:RIGHT),signal4(LEFT:RIGHT),'color',LINE_COLOR);
title('Speech signal 4');
end