基于MATLAB的语音端点检测(3)

基于MATLAB的语音端点检测

elseif amp(n) > amp2 || zcr(n) > zcr2 % 可能处于语音段 status = 1;

count = count + 1;

else % 静音状态

status = 0;

count = 0;

end

case 2, % 2 = 语音段

if amp(n) > amp2 ||zcr(n) > zcr2 % 保持在语音段

count = count + 1;

else % 语音将结束

silence = silence+1;

if silence < minsilence % 静音还不够长，尚未结束 count = count + 1;

elseif count < minlen % 语音长度太短，认为是噪声 status = 0;

silence = 0;

count = 0;

else % 语音结束

status = 3;

end

end

case 3,

break;

end

end

count = count-silence/2;

x2 = x1 + count -1; %记录语音段结束点

subplot(3,1,1)

plot(x)

axis([1 length(x) -1 1])

ylabel('Speech');

line([x1*inc x1*inc], [-1 1], 'Color', 'red');

line([x2*inc x2*inc], [-1 1], 'Color', 'red');

subplot(3,1,2)

plot(amp);

axis([1 length(amp) 0 max(amp)])

ylabel('Energy');

line([x1 x1], [min(amp),max(amp)], 'Color', 'red');

line([x2 x2], [min(amp),max(amp)], 'Color', 'red');