1D signal compare - elastic matching?

[TurboPC]

Hi gurus,

I used to do signal compare using elastic matching when I was at the university. That's 20 years ago. I do not remember much.

I have 2 uni-dimentional signals I want to compare. For some reasons, the signals could be partly stretched or compressed and it is not possible to match all the points between the 2 signals. The non-linearity stretching is not uniform.

If I remember correctly, the elastic matching technique can be used to match such signals. I need the equations on how to do this. It has something to do with finding the lowest energy path...

Any help or pointers is appreciated.

Thanks.

 

[Piligrim]

Hi TurboPC!

I think, there exists another ways to compare such a two signals, as you presented. If such signals stretched or compressed not much you can use simple DFT (FFT) and compare than their (frequency) images.