I have an audio data set in terms of frequency(Y axis) vs frame (X axis) and want to detect values above a threshold that also stays beyond the value for more than a particular interval of frames and repeat using a loop. Can someone help me with it?
Hi Niveditha. You can do this by first determining which elements of your frequency data are above the threshold, and then searching for a sequence of such elements. The code below creates a random vector, and searches for a sequence of 2 elements that are above the threshold of 0.5:
y = rand(10,1)
above_thresh = y > 0.5
num_frames = 2;
match = ones(num_frames,1);
It makes use of thefindsubmat File Exchange function found here: