More than w distance, are not okay.

So essentially, what I am saying that when you are aligning the two time streams,

you can look w unit before or w unit after for alignment in time.

That's okay that my stretching is okay but any stretching that

would basically require more than w units is not going to be accepted.

That's essentially the idea of the Sakoe-Chiba band and

note that basically if you use this constraint.

If your w is small essentially it means that you don't necessarily

need any to compute very large number of alternatives.

So you are only with a good feeling if it is a small band in your time series.

Itakura parallelogram is similarly an idea,

essentially what it say is, well, you know what?

Yes, we wanted window for stretching, but

the length of the window should be adaptive.

Instead of basically assuming that the length of the window,

I need to counter for stretching always w.

What we can do is we can assume that, at the beginning,