Re: [MP3 ENCODER] MS stereo

[reinhard]

>Reinhard, > >Because of the nature of the BMLD effect - it is dependent on the masking >threshold (not energy) and not on the tonality.     >More reading: > >J. D. Johnston and A. Ferreira, Sum-Difference Stereo Transform Coding, >Proc. IEEE ICASSP (1992) p 569-571. >or US patent #5285498 i thank that the masking threshold dependent on the tonality of the signal        but  i read the patent and the paper      so i ask why it depend on the signal power     the M/S threshold  calculated       Nthrsum=MAX(Thrnsum,MIN(Thrndif,mlddif))     Nthrdif=MAX(Thrndif,MIN(Thrnsum,mldsum))    and the mld = M(S)spreading-energy*facter   it look like only relative with the energy          >Regards, >Ivan Dimkovic