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Discussion Starter · #1 ·
When I am watching something on HBO HD on DTV; and it is in 4X3 format; is this 480p resolution?


When we get a presentation in 480p how much bandwith does it take to transmit via satellite vs 1080i.


I for one would be extemely happy if I could get programming in 480i for standard def programming.



But, of course I still want as much 1080i as I can get!
 

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Quote:
Originally posted by Randy
When I am watching something on HBO HD on DTV; and it is in 4X3 format; is this 480p resolution?
No. HBO upconverts all NTSC 4:3 to 1080i 4:3, which makes it an upconvert. Upconverts are not native HDTV.


In general, this is usually considered an acceptable policy, because the upconverter HBO uses is a professional piece of equipment, and is capable of doing a better job than the average consumers in-home equipment.
 

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Discussion Starter · #3 ·
Thanks Ken,


So since this is a 4x3 vs. 16x9 broadcast does it requre as much bandwidth?


How, would this compare to a 480p broadcast bandwith?


I guess my real question here is this; How much extra bandwidth would Directv require to bring everything to us in 480p???
 

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Randy,


All the widescreen movies on HBO HDTV are native 1080i.


As far as 480p, DirecTV can't deliver something content providers don't offer. AFAIK, no U.S. media outlet currently offers delivery of 480p content, aside from FOX on its digital broadcasts.
 

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Quote:
Originally posted by Randy
So since this is a 4x3 vs. 16x9 broadcast does it requre as much bandwidth?
Pretty much.

Quote:
I guess my real question here is this; How much extra bandwidth would Directv require to bring everything to us in 480p???
Without being too flip, who cares? Not me.
 

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Quote:
I guess my real question here is this; How much extra bandwidth would Directv require to bring everything to us in 480p??? [/b]
None, that is if our satellite receivers worked like our DVD players that output a 480p signal. OR If your HDTV can accept a 480i signal and convert it to 480p, it would pretty much be the same thing IMHO.
 

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Discussion Starter · #7 ·
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Without being too flip, who cares? Not me.


Pretty flip Ken...I was actually trying to learn something.
 

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Just for reference - DTV HBO SD chan 501 probably takes about 4Mb/s bandwidth.

DTV HBO HD chan 509 takes more like 14Mb/s...


So - about 3.5 times as much for HD compared to SD.
 

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Quote:
Originally posted by Randy
Pretty flip Ken...I was actually trying to learn something.
Well, in that case...


As pointed out, unless someone provides 480p to DirecTV, they can't deliver it. Which makes your question a moot point because besides Fox, all announced plans for ATSC channels on cable / sat are HDTV formats.


Anyway, pixels per second, at full bore:

HDTV 1920x1080i = 2,073,600

HDTV 1280x720p = 1,843,200

EDTV 640x480p = 614,000


So for each HD channel, you could fit 3 ED channels.
 

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Discussion Starter · #10 ·
Thanks Ken,


That is exactly what I was looking for!
 

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Quote:
Originally posted by Ken H
Anyway, pixels per second, at full bore:

HDTV 1920x1080i = 2,073,600

HDTV 1280x720p = 1,843,200

EDTV 640x480p = 614,000
Nice try, Ken. That would be pixels per field (i) or per frame (p), methinks.:)
 

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I care. I would like to see some of the channels that are not doing HD and have no plans to do HD do 480p. Why not? Better than DVD (if they do it right), widescreen, and lower bandwidth. Yeah, it might make others think about not doing HD, but if they cannot make money doing HD over EDTV, they won't do it anyway.
 

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Quote:
Originally posted by JFerg
It is really a mute point as the bandwidth for ATSC is set.


I was talking about cable and sat. channels, not OTA. I want OTA channels to be HDTV, but channels like TNN, TBS, SCIFI, Comedy Central, FX can do widescreen 480p, and on satellite, it will take up less bandwidth than HBO's 1080i.


Can anyone tell me how much of a difference in bandwidth these two channels would be:


HBO-HD showing 1080i on Directv

and

TNT-ED showing 480p on directv


tim
 
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