[vorbis-dev] 2d wavelet transforms

[jsr at dds.nl]

>It doesn't matter, as long as your inverse transform 
expects
>the same ordering. Use the one that compresses better
>(I think that would be the second one).

Yeah, I see it now. The second one is best, it looks 
illogical in 1D because it's a 2D transform of a 2D signal, 
which is 2D itself. It does look logical if you view it as 
a 2D result.

>You can view unsigned data as signed data, that "just 
happens"
>to be all positive :-)

That won't give trouble? Okay, I wasn't sure...

>If think you'll get better results if you transform the 
pixel
>luminances to log doamin first (take a dB or something).

Hmm, good idea. I haven't thought about preprocessing 
(conversion to yuv etc.) that much yet. I should.

>...or to work _at all_, in my case ;-)
>(Just found out that a 10^48 big codebook is a no-no).

Heh. Want to borrow some disk space? :)

Lourens

--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to 'vorbis-dev-request at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.