[vorbis-dev] Ogg VEO Codec, video in an Ogg stream

Monty xiphmont at xiph.org
Wed Aug 30 19:45:59 PDT 2000



> On 30 Aug, Jack Moffitt wrote:
> >> Why not use SETs on non 2^x-sized blocks?
> > 
> > What is a SET? :)
> 
> Symmetric Extension Transform. Basically uses certain properties of the
> wavelet to enable you to extend the block to 2^x, then chop off a
> certain amount of the wavelet-transformed data, resulting in a
> non-expansive wavelet transform for non-2^x block sizes.
> 
> I'll see if I can't dig up the paper.

Do, please.  I've known about techniques for avoiding edge effects in wavelets 
for some time, but I've never bothered to track down papers.  Do you also have 
references to offer for non-circular wavelet transforms?

Monty

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