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Article #44

Re: Real Audio

#44
From: Robin Watts
Date: Wed, 25 Nov 1998 00:00
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In article <73gge4$nav$1@inkvine.wincoll.ac.uk>, Chris Rutter
<URL:mailto:chris@fluff.org> wrote:
> arakeen@my-dejanews.com <arakeen@my-dejanews.com> wrote:
> 
> > No, but there almost was. I wanted to do a converter for an
> > A-level computing project, but unfortunately Progressive Networks,
> > I believe it is, said No, I couldn't. They were very nice about it
> > though. I presume if someone were to make it commercialised ie.
> > Progressive make loadsa money out of it...
> 
> This isn't strictly true: the protocol used by Progressive's
> RealAudio is publically available:

Thats not true at all. The *protocol* used to transfer files (the PNA
protocol) is proprietry to Real Inc (as Progressive Networks are now
known).

One of the formats of the files is indeed LD-CELP.

> Try searching for an archive called `ld-celp'.  Admittedly, I'm not
> sure whether this covers all versions or all the tricks that
> RealAudio uses, but I've certainly heard of it being used to play
> back .ra files.

It covers the 28.8kbps codec. That leaves 14.4, dnet, sipr and G2 to
do...

Robin
-- 
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From: Robin Watts <Robin.Watts@wss.co.uk>
Subject: Re: Real Audio
Date: 1998/11/25
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