[opendtv] Re: Optimizing the system

  • From: Craig Birkmaier <craig@xxxxxxxxx>
  • To: opendtv@xxxxxxxxxxxxx
  • Date: Wed, 22 Dec 2004 10:11:24 -0500

At 1:48 PM -0500 12/21/04, Manfredi, Albert E wrote:
>Craig Birkmaier
>>  > Craig talks about "economics," but doesn't bother to
>>  > explain what the issue is.
>>  Economics...
>>  The "bell" in the curve is not at the high end of the
>>  market. And HD is an application, not the lowest
>>  common denominator of commercial television.
>>  See the IDC story I posted this morning.
>You continue to miss the obvious.

I see...

>For the nth time, as long as *all* digital TV receivers
>are signal-compatible with *all* HD and SD modes, what
>mode is transmitted is of *no consequence* to the price
>of the receiver. None whatever.


>It is pointless for an HD-DVD manufacturer to use
>anything less than a 1080-line mode unless there's a
>problem with disk capacity.

Bull.  Only a TINY percentage of ALL customers will be able to see 
the difference between 1080P and 720P, and 720P can be upconverted 
easily to 1080P by the few sets that will have this ability.

>Ditto for the broadcaster.

MORE BULL. The broadcaster has 6MHz, which currently equates to 19.2 
Mbps for EVERYTHING they want to put in their multiplex. IT IS ABSURD 
to believe that broadcasters should optimize that multiplex for a few 
percent of the total audience. If you doubt this Bert, why are 
broadcasters desperately trying to hold onto NTSC, which is inferior 
to ANY ATSC digital format?

>HD is to video as hifi is to audio. It's totally
>pointless for an FM station to transmit 50 Hz to 5000 Hz
>audio, with < 30 dB of dynamic range. (Unless a
>particular recording or ad does this for effect.)

Apples and oranges. Analog transmission systems are...analog. It 
makes sense to optimize the signal for the pipe, as this is the ONLY 
program you can deliver via that pipe (sideband services aside). That 
being said, most stations DO NOT optimize for best quality, but 
rather, add pre-emphasis to the signals to make them "sound' better 
in demanding environments, like vehicles.

>Imagine how ridiculous it would be for an FM station
>manager to justify transmitting crappy audio on the
>basis of "most boom boxes out there can't tell the
>difference." The obvious retort being, "So what? What
>do you have to lose if you transmit the full audio

A bunch of that audio range, because even FM cannot deliver it all. 
Most stations are happy with CD quality. The reality is that NO 
STATION is going to try to deliver everything using Super Audio CD, 
because the difference in quality is negligible after the signal has 
been processed and transmitted via the limited FM pipe.

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