Re: quantization question

Char Acter <[email protected]> Fri, 4 Apr 2003 13:02:26 -0800 (PST)
Newsgroups gmane.comp.video.h264.devel
Message-ID <[email protected]>
I would say this is equivalent:

     if( W >= 0) {
         Z = ( W*MF + f) >> qbits;
     } else {
         Z = -(( -W*MF + f) >> qbits)
     }

because >> should not be used on a negative number.

Any other opinions out there?

--- Aitor Garay <[email protected]> wrote:
> Hi!,
> 
>     As the reference software, i'm using for the
> quantization the following expression:
> 
>     |Z| = ( |W|*MF + f) >> qbits
>     sign( Z) = sign( W)
> 
>     Is this equivalent?
> 
>     if( W >= 0) {
>         Z = ( W*MF + f) >> qbits;
>     } else {
> 
>             Z = ( W*MF - f) >> qbits
>     }
> 
>     /AITOR
> 
> 


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