Vorbis - Aug 2005 - Frame in Mpeg and Window in Vorbis

Hi All,

MPEG L3 has a fixed frame size of 1152 samples which are fed to the encoder and
vorbis has a variable winow size ?????? is this correct ?

Frame in MPEG is window in Vorbis ?? 

I guess iam making a mistake somewhere? Can some one correct?


Ravi
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On Mon, Aug 29, 2005 at 12:44:35PM -0000, Ravi  Lakkundi wrote:
> MPEG L3 has a fixed frame size of 1152 samples which are fed to the encoder
and vorbis has a variable winow size ?????? is this correct ?
Yes. Each stream has two sizes ('blocks' in vorbis terminology). Each is
a power of two, and the actual two sizes used are defined in the header.
> Frame in MPEG is window in Vorbis ?? 
I'm not an MP3 expert, but I understand that is the correct 
correspondence.

I also understand AAC has long and short blocks/frames/windows,
but it always uses runs of short blocks to exactly match the
length of a long block, so one maintains something very similar
to a fixed frame size.

 -r