[vorbis] about vorbis encoder

[Michael Smith]

On Tuesday 09 March 2004 22:27, Leena wrote:
> Hello !!
>
>    Can anyone tell me what is this PACKETBLOBS in vorbis encoder .?
> The value of this is 15 . So is that complete packet is divided into 15
> parts .

I think (I haven't checked, this is from distant memory) the PACKETBLOBS value 
is used for bitrate management - the vorbis encoder will do partial encodes 
of the data multiple times, then select between them. 

>
>   I am not that way clear with function floor1_fit .  Each blob is divided
> into
> posts . ( floor points ) Those points are quntised and fitted into line fit
> function .
> Can anyone tell me how this line fit function is calculated ..
>

I'm not sure quite what you're asking here. 

Is it: 
a) How are the floor points calculated (i.e. how do we fit line segments to 
the original data)? This is a pretty straightfoward line-fitting algorithm 
minimising local error in the fit.
or
b) How is the floor data calculated before the line fit and quantisation? This 
is very complex - this is where the psychoacoustic model comes in. A simple 
explanation would not suffice.

Mike

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