[vorbis-dev] Thought for the new year

Monty xiphmont at xiph.org
Sun Dec 31 12:01:04 PST 2000

> > The obvious idiot/newbie followup is:  Well, then would it be possible and
> > useful to split the signal into a couple of frequency bands and encode them
> > each with differently sized blocks?
> > 
> Patented?

Possible, yes. Patented: Don't know, haven't looked.  It seems likely
there are patents on the subject as there are numerous academic
publications.  They correlate.

The good news is that, although audio/DSP related patents have the
tendancy to be covering obvious techniques, they don't actually tend
to be overbroad.  I'd lay money there's still a way to use this (and
it is a direction I plan to explore; multiresolution windows by band
has been in the back of my mind for a long time, and is probably going
to be in new Squish before it's in Vorbis or a Vorbis successor).


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