yule walker Psd of .Wav file

1 次查看（过去 30 天）
777
777 2012-3-7
hi i m new to matlab.i m trying to obtain 4th order yule walker psd estimate of a wav file ,using pyulear command but it is generating error message every time.
[b1, f] = wavread('bcopy.wav');
>> [Pxx fs] = pyulear(b1,4)
??? Error using ==> aryule at 29
X must be a vector with length greater or equal to the model order.
Error in ==> arspectra at 75 [a,v] = feval(method,x,p);
Error in ==> pyulear at 65 [Pxx,freq,msg,units,Sxx,options] = arspectra(method,x,p,varargin{:});
plss help me with this.

请先登录，再回答此问题。

采纳的回答

Wayne King
Wayne King 2012-3-7
You want to just input one column vector and not the matrix
b1 = b1(:,1);
[Pxx fs] = pyulear(b1,4);
  2 个评论
777
777 2012-3-7
well i got the result but i did'nt understand it.
Wayne King
Wayne King 2012-3-7
because your audio file was 2-channel but pyulear only works on vectors, it was interpreting the column dimension of your matrix as the vector length and complaining that it was only 2 while you were asking for a model of length 4

请先登录，再进行评论。

更多回答（1 个）

Wayne King
Wayne King 2012-3-7
What is the length of b1? is it only three samples in length? or empty?
You have the model order of 4 but apparently your input b1 is less in length than that.
  1 个评论
777
777 2012-3-7
while using waveread i have not specified anything about sample size .does the error here mean default sample size is less than 4.???workspace shows the value of b1 as <71680x2 double>

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Parametric Modeling 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by