Matlab code for LMS filter to remove noise from audio signal

Question

Rizwan Bagwan 2018-3-18

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/389004-matlab-code-for-lms-filter-to-remove-noise-from-audio-signal

评论： Rizwan Bagwan 2018-3-19

After removing some part of vocals from stereo audio how to filter it to get more precise karaoke output with the help of lms filter plz suggest as I'm fresher

if true % this code i hv applied after splitting audio in 2 chls & inverted and finally added to get karaoke but its noise output alongwith vocals so to remove noise and vocals i hv used this codes but its not working.

mtlb_noisy = y;
 noise = n; 
% Define Adaptive Filter Parameters
filterLength = 32;
weights = zeros(1,filterLength);
step_size = 0.004;
% Initialize Filter's Operational inputs
output = zeros(1,length(mtlb_noisy));
err = zeros(1,length(mtlb_noisy));
input = zeros(1,filterLength);
% For Loop to run through the data and filter out noise
for n = 1: length(mtlb_noisy),
      %Get input vector to filter
      for k= 1:filterLength
          if ((n-k)>0)
              input(k) = noise(n-k+1);
          end
      end
      output(n) = weights * input';  %Output of Adaptive Filter
      err(n)  = mtlb_noisy(n) - output(n); %Error Computation
      weights = weights + step_size * err(n) * input; %Weights Updating 
  end
yClean = err;
But its not working
plz suggest me I hv to implement karaoke output.

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Answer 1

Abhishek Ballaney 2018-3-19

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/389004-matlab-code-for-lms-filter-to-remove-noise-from-audio-signal#answer_310616

https://in.mathworks.com/help/hdlcoder/examples/lms-filter-noise-cancellation.html

https://in.mathworks.com/help/dsp/ug/lms-adaptive-filters.html

https://in.mathworks.com/help/dsp/ref/dsp.lmsfilter-system-object.html

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Rizwan Bagwan 2018-3-19

Thanks a lot for suggesting I have searched this but finally how to implement that codes or algorithms i dont have dsp toolbox so how to do it I'm not knowing plz suggest in some simple ways or simply which code i can use plz suggest

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