Vorbis - Jul 2005 - MCDT,FFT and more

I write a work over Vorbis. ?

?Now I have a few questions to the function. ?

 

?For what is the MDCT used? ?

 

?For what is the FFT used? ?

 

?How is the expiration with the encodieren? ?In the reference to the
MDCT,FFT and the hearing model . ?

 

?Is there a volume fragmentation in Subband as MP3? ?

 

?If it is possible, the answers in the detail 

 

?Thanks ?

 

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On 6/10/05, evil <evilf@gmx.de> wrote:
>  
>  
> 
> I write a work over Vorbis. ? 
> 
> ?Now I have a few questions to the function. ? 
> 
>   
> 
> ?For what is the MDCT used? ? 
That's a fundamental part of  the format. After windowing, the data is
transformed into the frequency domain using the MDCT - the
specification has full details.
> 
>   
> 
> ?For what is the FFT used? ? 
The reference encoder does FFTs during analysis, but it's not part of
the format.
> 
>   
> 
> ?How is the expiration with the encodieren? ?In the reference to the
> MDCT,FFT and the hearing model . ? 
No idea what this question is about, sorry.
> 
>   
> 
> ?Is there a volume fragmentation in Subband as MP3? ? 
Vorbis doesn't have subbanding like mp3.

Mike