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Re: [Opendivx] wavelets



Federico,

Do you know if there were studies done to prove that wavelets would not be
better than dct?  And has the situation changed now - are there new wavelet
(or perhaps matching pursuits) schemes that could outperform dct?

In fact, it could be said that the dct scheme we have is wavelet based!  The
definition of a wavelet actually encompasses dct basis functions.

So, DivX uses wavelet compression ;-)

Tell me if you agree/disagree!

John


----- Original Message -----
From: ridaas syncprodz.com <[email protected]>
To: <[email protected]>; <[email protected]>
Cc: <[email protected]>
Sent: Thursday, February 01, 2001 9:10 AM
Subject: Re: [Opendivx] Reusability



wavelet is very good for still images, it will be the major point of the
coming jpeg2000 standard.

for mpeg4 they (mpeg group) talked about putting wavelet but they saw the
added complexity will not increse the performance since with video wavelet
and dct works quite the same.

federico
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