Vorbis - Mar 2001 - [Fwd: Re: File formats (RE: MP4 Player Available for Download)]

I recall reading that all MPEG AAC software has different and
incompatible file formats , because this is a condition set by
the MPEG AAC technology licensing authority.
Some kind of yet-another-anti-piracy-measure, the idea probably
being that users of different software can not swap their files.

I picked up this a while ago when following AAC software development,
but can't remember exactly where.

 
> I'm forwarding this to the vorbis list FYI. 
> I'll also forward the reply. 
> 
> Marshall 
> 
> -------- Original Message -------- 
> Subject: Re: File formats (RE: MP4 Player Available for Download) 
> Date: Thu, 15 Mar 2001 10:29:20 -0500 
> From: Marshall Eubanks <tme@21rst-century.com> 
> Reply-To: tme@21rst-century.com 
> Organization: Multicast Technologies 
> To: philippe.gentric@philips.com 
> CC: rem-conf@es.net 
> References: <0056900016627917000002L072*@MHS> 
> 
>  philippe.gentric@philips.com wrote: 
> 
> > > -----Original Message----- 
> > > From: robla@real.com [mailto:robla@real.com] 
> > > Sent: Wednesday, March 14, 2001 18:55 
> > > To: hari@FLAVORSOFTWARE.com; BNowicki@Omneon.com 
> > > Cc: rem-conf@es.net 
> > > Subject: File formats (RE: MP4 Player Available for Download) 
> > > 
> > > 
> > > 
> > > At 11:54 AM 3/13/01 -0800, Bill Nowicki wrote: 
> > > >We just tried the obvious experiment. 
> > > > 
> > > >The ".mp4" files on the "Flavor" site do
not play with the
> > > >Philips player, and the Philips ".mp4" files do not
play with
> > > >the Flavor player. Sounds like a litle inter-operability 
> > > >testing might have been in order before calling them the same
> > > >name! 
> > > > 
> > > >(and of course file format standards are outside the charter 
> > > >of IETF, but are still useful) 
> > > 
> > > Not that I'm disagreeing with you here, but an honest
question for
> > > you: whose charter includes specifying file formats? Clearly,
ISO/MPEG
> > > have taken it on, but they've also created a situation where
I think
> > > genuine interoperability is out of the question for anyone who
either
> > > doesn't have a patent licensing agreement from 30 different
companies, or
> > > who chooses to ignore the issue. 
[ snip ]


-- 
David Balazic
--------------
"Be excellent to each other." - Bill & Ted
- - - - - - - - - - - - - - - - - - - - - -

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"David Balazic" <david.balazic@uni-mb.si> wrote:
> I recall reading that all MPEG AAC software has different and
> incompatible file formats , because this is a condition set by
> the MPEG AAC technology licensing authority.
> Some kind of yet-another-anti-piracy-measure, the idea probably
> being that users of different software can not swap their files.
That's right - this is mostly done to avoid piracy, so that there
is no 'standard' for AAC files. Good example is Liquid Audio.
I think that AAC wasn't developed to be used as 'another'
MP3, it's usage is focused towards companies that sell audio
over the internet, for portable players, satellite communications...

Greetings,
Aleksandar

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