[theora-dev] What's in a name?
dan at on2.com
Mon Mar 3 09:11:25 PST 2003
quote from the person directly responsible:
"It is sort of like a mini-hilbert traversal on a super block row."
So apparently Hilbert was involved.
He also said the pattern reminded him of Space Invaders.
<p>> -----Original Message-----
> From: Mike Melanson [mailto:melanson at pcisys.net]
> Sent: Friday, February 28, 2003 2:35 PM
> To: theora-dev at xiph.org
> Subject: RE: [theora-dev] What's in a name?
> On Fri, 28 Feb 2003, Dan Miller wrote:
> > This is important because it maximizes correlation between
> samples when constrained to a single predictor (ie linear
> delta coding). I believe this is the pattern we use to
> predict DC coeffs in a 'superblock' (32 x 32 block with 16
> 8x8 blocks within), no?
> I'm not sure if I follow you here. From my analysis, that is the
> pattern used to code DCT coefficients. First, all of the DC coeffs are
> decoded according to that pattern. Then all of the 1st AC
> coeffs, 2nd AC
> coeffs, etc.
> I don't see the pattern as having anything to do with DC
> prediction. After all of the coeffs are unpacked and arranged
> in rows of
> fragments, the DC prediction is reversed.
> -Mike Melanson
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