问题描述
如评论链接所示,提取了Talkin语音箱中音调跟踪的鲁棒算法的音高(功能名称为"fxrapt").
As seen in comment link a pitch by Talkin’s Robust Algorithm for Pitch Tracking in voicebox (function name is "fxrapt") is extracted.
http://www .ee.ic.ac.uk/hp/staff/dmb/voicebox/doc/voicebox/fxrapt.html
但是,我需要通过检测每个音调周期内的最大幅度来找到LP误差信号中的音调脉冲.对于每个音调脉冲,两个音调周期的汉明窗长.如果T(i-1),T(i),T(i + 1)表示三个连续音调脉冲的位置.如波纹管连接图所示,如何为跨度从T(i-1)到T(i + 1)的音调脉冲设计分析窗口?
However, I need to find pitch pulses in the LP error signal by detecting the maximum amplitude within each pitch period. For each pitch pulse, a Hamming window of two pitch periods long. if T(i-1), T(i), T(i+1) denote the locations of three successive pitch pulses. How can I design a analysis window for the pitch pulse at spans from T(i-1) to T(i+1), as illustrated in bellow link Figure ?
我正在寻找MATLAB代码.如果有人可以帮助我,我将不胜感激.谢谢.
I am looking for MATLAB code for it.I will really appreciate, if anyone can help me.Thanks.
推荐答案
步骤:
- 应用音高轨迹来查找每一帧的周期,而不要使用在您的音调轨道上过度分配,您需要同步且线性地进行.
- 每次找到周期= P"时,都在1到P * 2范围内的信号上搜索最大绝对振幅
- Apply the pitch track to find the period at each frame, not useoveralp in your pitch track, you need do it synchronous and linearly.
- At every time that you find the Period = P search the maximun absolute amplitude on the signal between the range 1 to P*2
这两个步骤可以像这样完成:
these two steps can be done like this:
while ( (k+Step-1) <= Nsamples )
frame = x(k:k+steps-1);
P=PITCHTRACK_FUNCTION_HERE
[v, l] = max(abs(frame(1:P*2)));
if count == 1
marks(count) = l;
else
marks(count) = l+k-1;
count = count +1;
k=k+Step;
end
-
您现在已经拥有所有标记,都指向您的整个信号,然后步行围绕矢量标记以应用两个间距的汉明窗时间长!
you now have all marks referring to your entire signal, then walkaround the vector marks to aplly a Hamming window of two pitchperiods long !
test=zeros(length(x),1); for p=2:length(marks)-2 last=marks(p-1); next=marks(p+1); test(last:next)=test(last:next) + x(last:next) .* hamming(length(x(last:next))); end
PS:
x =您的信号
Nsamples =长度(x)
Nsamples = length(x)
k =以1开头
Step = 256或512或1024或2048
Step = 256 or 512 or 1024 or 2048
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