> >
> > by
> > the way, LAME doesn't use IS. I believe people have posted here that
> > it is only usefull for lower bitrates. We could try and add IS, but I
> > dont know how usefull it is since most low bitrate applications seem
> > to be in mono.
>
> If, when encoding in mid-side, the side channel represents - to within
> masking thresholds - a straightforward scaling of the mid channel, the
> encoder should presumably switch to IS. IIRC, phase response in human
> hearing is poor at very low and very high frequencies (directional sense
> mostly operates on mid-band frequencies); are the side masking thresholds
> correspondingly high in the extreme upper and lower bands?
>
> -- Mat.
My reason for not looking into coding up IS: at 128kbs, I've never
seen the FhG encoder us it. They even have an option to disable IS
altogether. Also, Rafael (the author of Mpecker) posted a long time
ago that he tried IS and it didn't help.
Mark
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