[FFmpeg-devel] [Issue 664] [PATCH] Fix AAC PNS Scaling

Robert Swain robert.swain
Tue Oct 7 21:45:26 CEST 2008

2008/10/7 Alex Converse <alex.converse at gmail.com>:
> On Tue, Oct 7, 2008 at 3:24 PM, Michael Niedermayer <michaelni at gmx.at> wrote:
>> iam not sure how you can call that "far more significance" on one hand and
>> pretend that skiping per band normalization would be ok OTOH.
> Says the man who made Rob change it from the correct per band
> implementation in the first place because he didn't know what he was
> talking about, who likes to argue the finer points of the AAC
> specification without even having access to a copy of the conformance
> rules.
> Per band is what MPEG asks for. Not doing it per band results in
> statistics that deviate significantly from the sample statics measured
> by the encoder that the decoder is trying to mimic. They have made
> this clear on numerous occasions.

Hmm, a slightly aggressive tone...

Personally, I think we should re-implement the per-band normalisation
to be conforming. Any complaints about doing this?


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