[Vorbis-dev] contstant bittrate mode - block size - packet size
xiphmont at xiph.org
xiphmont at xiph.org
Wed May 2 02:19:06 PDT 2007
Argh, I should proof more to avoid small but numerous technical errors...
I'm using a slightly different definition of 'frame' and 'packet' than
the mp3 spec is, so to clarify:
A 'packet' is a group of bytes in the file. A 'frame' is a
self-contained amount of decoded audio... Most mp3 docs just use
'frame' for both and pretend they're the same thing.
On 5/2/07, xiphmont at xiph.org <xiphmont at xiph.org> wrote:
> (the frame size is kept the same but the amount of audio it holds
s/frame size/packet size/
> sloshes around using a 'bit reservoir'). I believe the rule of thumb
> in mp3 is that you need up to nine frames to make sure you're certain
s/nine frames/nine packets
> implementing a 'bit reservoir' like in mp3, but the reservoir is not
> hidden behind constant sized frames. However, like mp3, the reservoir
constant sized 'packets'
> to do short/long block detection. Unlike most mp3 decoders, it is not
mp3 *en*coders
Monty
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