Re: YES Virginia, 24 kbit/s can sound good (with HE-AAC codec)

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Article #639

#639

From: jhardis
Date: Wed, 03 Oct 2007 02:29

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On Oct 2, 10:11 am, David <rick...@knac.com> wrote:
> >3)  "HD Radio" uses a codec known as HDC (a.k.a. "HD Codec").  While
> >iBiquity has acknowledged that it uses SBR, they have pointedly
> >declined to discuss whether or not it has any other similarity to HE-
> >AAC. I doubt that you could cite an authoritative source, but if you
> >could I would love to know about it.
>
> The players (companies) are the same as the ones who implement
> AAC+SBR, e.g. Fraunhaufer and Coding Technologies and Neural, aren't
> they.

Of the three companies you mention, Coding Technologies is the one
that has an AAC+SBR implementation (under the tradename aacPlus).

But you miss the point.  You are relying on inferences and guesswork
for something that -- whether a correct guess or an incorrect guess --
ought to be public information, but isn't.  This is of great concern
to me because of its consequences.

For more information, please see:
http://fjallfoss.fcc.gov/prod/ecfs/retrieve.cgi?native_or_pdf=pdf&id_document=6519550109
and the hyperlinked footnotes within.

  - Jonathan

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From:  jhardis <jhardis@tcs.wap.org>
Newsgroups: rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
Subject: Re: YES Virginia, 24 kbit/s can sound good (with HE-AAC codec)
Date: Tue, 02 Oct 2007 19:29:31 -0700
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