In article .com,
says...



Steven wrote:

HD/IBOC does not employ AAC, although an earlier
version may have IIRC. It uses something called PAC(?)


You have it backwards. It used to be PAC, derived from MP3.

Early testing showed it didn't work very well, so the codec was
switched to MPEG4 AAC+SBR.

No, it wasn't. The codec was changed to something iBiquity calls "HDC."
It is known to use the Coding Technologies' Spectral Band Replication
technology (as does MPEG HE-AAC) but its technical details are otherwise
held secret by iBiquity. This secrecy has caused considerable
controversy in the broadcast industry.

Bob Orban

Robert Orban wrote:
In article .com,
says...



Steven wrote:

HD/IBOC does not employ AAC, although an earlier
version may have IIRC. It uses something called PAC(?)


You have it backwards. It used to be PAC, derived from MP3.

Early testing showed it didn't work very well, so the codec was
switched to MPEG4 AAC+SBR.

No, it wasn't. The codec was changed to something iBiquity calls "HDC."
It is known to use the Coding Technologies' Spectral Band Replication
technology (as does MPEG HE-AAC) but its technical details are otherwise
held secret by iBiquity. This secrecy has caused considerable
controversy in the broadcast industry.



It shouldn't be too diifficult to determine - just use a little
reverse engineering. If it's using SBR, well that's all that really
matters. SBR extends the high-frequency components from ~8 to 16
kilohertz, so that even an MP3 + SBR sounds good.

In article . com,
SFTV_troy wrote:

Robert Orban wrote:
In article .com,
says...



Steven wrote:

HD/IBOC does not employ AAC, although an earlier
version may have IIRC. It uses something called PAC(?)


You have it backwards. It used to be PAC, derived from MP3.

Early testing showed it didn't work very well, so the codec was
switched to MPEG4 AAC+SBR.

No, it wasn't. The codec was changed to something iBiquity calls "HDC."
It is known to use the Coding Technologies' Spectral Band Replication
technology (as does MPEG HE-AAC) but its technical details are otherwise
held secret by iBiquity. This secrecy has caused considerable
controversy in the broadcast industry.



It shouldn't be too diifficult to determine - just use a little
reverse engineering. If it's using SBR, well that's all that really
matters. SBR extends the high-frequency components from ~8 to 16
kilohertz, so that even an MP3 + SBR sounds good.

You never finnish your sentences. You mean sounds good to tin ears.

--
Telamon
Ventura, California

Telamon wrote:

You never finnish your sentences. You mean sounds good to tin ears.



Uh huh. On the day you learn manners...... well, that will never
happen, so why waste time discussing it. A man of your advanced age
has always acted like a childish ill-manned person, and probably
always will act like a childish ill-manned person.

On Oct 9, 10:00 am, SFTV_troy wrote:
Telamon wrote:

- - You never finnish your sentences. You mean sounds good to tin
ears.
-
- Uh huh. On the day you learn manners...... well, that will never
- happen, so why waste time discussing it. A man of your advanced age
- has always acted like a childish ill-manned person, and probably
- always will act like a childish ill-manned person.

SFTV -aka- "Hybrid Digital" Man,

At best it could be say that 'you' Parrot everyone else's behavior
toward you : Which is a direct result of your actions to begin with.

* You seem to have a personal 'issue'
with those who are much older than you.

* Your Posts and Replies often have a
Mean Spirited 'Tone' to to them.

hopefully you will reflect on these comments ~ RHF

In article . com,
SFTV_troy wrote:

Telamon wrote:

You never finnish your sentences. You mean sounds good to tin ears.



Uh huh. On the day you learn manners...... well, that will never
happen, so why waste time discussing it. A man of your advanced age
has always acted like a childish ill-manned person, and probably
always will act like a childish ill-manned person.

Are you a gay digital engineer Miss manners?

--
Telamon
Ventura, California