🚀 go-pugleaf

jhardis wrote:
> On Sep 30, 5:11 pm, SFTV_troy <SFTV_t...@yahoo.com> wrote:
> > HE-ACC + SBR is the codec used in Hybrid Digital Radio, Digital Radio
> > Mondiale, and DAB+.
>
> 1)  The ACC is an athletic conference within the NCAA.  You mean AAC.

The "AAC girls" was Playboy's best issue.

;-)



> 2)  There is no such thing as "Hybrid Digital" radio. HD Radio is
> a trademark of iBiquity Digital Corp for their IBOC implementation,
> and the "HD" doesn't mean anything in particular.

False.  Go look it up on wikipedia, and you will see a link to an
email from the HD Alliance.  That email confirms that HD means Hybrid
Digital.



> 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.


(1) Wikipedia states it is AAC.

(2) Even if wiki is wrong, you find that SBR codecs are the most-
advanced.  Take MP3pro for example, which is essentially MP3 + SBR.
It routinely ties with AAC+SBR in listening tests.

(3) iBiquity has already stated it is "based on MPEG4", the most-
advanced standard currently available for audio compression.

So to summarize: We know definitely that it's MPEG4 with SBR.  We know
wikipedia states it is based upon AAC.  It's safe to make an educated
guess that HDC == MPEG4 AAC+SBR, or a derivation thereof.