>
> Hi Everyone,
>
> I just have a couple of questions:
>
> a) where do the tone-masking-noise and noise-masking-tone values (29 and 6 dB) come
>from and
> b) why are they suddenly 18 and 6 dB for MPEG-2 AAC???
>
> Thanks in advance,
>
> Erik--
> MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
>
-=- MIME -=-
Hi Everyone,
I just have a couple of questions:
a) where do the tone-masking-noise and noise-masking-tone values (29 and 6 dB) come
from and
b) why are they suddenly 18 and 6 dB for MPEG-2 AAC???
Thanks in advance,
Erik--
MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
I will try to dig up the reference for those NMT/TMN values, but
it is a conference proceedings and I've never been able to find the
actual paper.
That's interesting that AAC goes down to 18db (resulting in
more masking). I just did a quick VBR test - using the AAC
values lowerd the average bitrate by 2kbs, so it seems to be a small
effect.
Mark
--
MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
