Similarity measurement between to waveform

I want to compare 2 time series waveform to get a single value metric describing the similarity in shape (waveform).

One possible candidate for such metric is KL divergence which was implemented here. KL does not work very well in discriminating different shapes and the metric does not have symmetric properties so it is not quite effective as distance/similarity metric.

I am open for more suggestions on the similarity measurement between two waveform.

Thanks

Answer 1

[Image Analyst]

What about mean square error or root mean square error or PSNR? Can you attach your two signals? Or plots of them?