Hi Sudhir,
I understand that you want to implement the "haar transform" of an audio signal without using inbuilt MATLAB function.
To implement this, kindly refer to the following steps:
1. Load your audio signal sampled at 16 kHz into MATLAB.
2. Implement the Haar wavelet transform as a custom function:
function output = haar_transform(signal)
N = length(signal);
output = zeros(size(signal));
for len = N/2:-1:1
avg = (signal(1:2:len) + signal(2:2:len)) / 2;
diff = (signal(1:2:len) - signal(2:2:len));
signal(1:len) = avg;
output(len+1:2*len) = diff;
end
end
3. Call the "haar_transform" function on your audio signal to obtain the Haar wavelet coefficients.
haar_coefficients = haar_transform(your_audio_signal);
For more information regarding "haar transform", kindly refer to the following documentation:
I hope this answer resolves your query.
Regards,
Nithin Kumar.
