High Def Forum - Your High Definition Community & High Definition Resource - View Single Post - Half Empty or half full? Why 768x1024 is HD

S0LE_SURVIV0R · 02-18-2006, 10:11 AM

I have been reading here that some people are calling 768x1024 EDTV?
I would have never bought this 768x1024 Plasma if it was an EDTV.
Yes I'm well aware of 1250 pixels across for the 720p signal. But remember that is an ATSC rating, there is no ATSC format of 768x1024, just as there is no 768x1366. I have monitors with both resolutions.
Those who fail to acknowledge that 768x1024 is HD, is cutting the ATSC 1250 across pixel count to fine. Speak in terms of practical purposes. People can also say that a 768x1199 is EDTV if they want to as well.
For all practical purposes, when you reach the 720p vertical threshold on a set, you are receiving HDTV, the 720p signal. EDTV is 480p. Plain and simple, Like what FOX used to broadcast before they went to 720p.
As my set top box manual says
1080i HDTV
720p HDTV
480p EDTV
So it has 1024 pixels per line and not 1250 BFD.....???? But the set also has 768 vertical, 48 more than 720.
The ED 480p signal (ATSC) has 704 pixels across. That is the real ED, if a set has 852 across, that is the set up scaling it. if a 480x852 set converts a 720p signal, it is EDTV because it is closer to the EDTV signal of 480x704.

If a 768px1024 set receives a 720p signal, it is HDTV, because the resolution neighbors the 720p x 1250 HDTV signal. So this isn't a case of,....... is the glass half empty or half full. It doesn't fall in the middle.

480px704 EDTV
240 vertical rows short of the ATSC rating of HDTV
704 pixels across .....546 pixels short of the ATSC rating of1250

A 480x852 monitor =EDTV
Vertical rows match 480
148 more pixels across. Up or down scales.
It neighbors the 480px704 EDTV signal

720p signal HDTV
720 vertical 1250 across.

A 768x1024 set.
48 more vertical rows of resolution.
226 less pixels per line across.

VERTICAL
Compare that to the ATSC ED rating of 480p vertical rows
288 more vertical
& 48 more up & down than their HD 720p rating.

Horizontal
Now using the 1250 pixels across ratio, ...compare 226 less pixels per line across less on the 768x1024 set to the
EDTV rating of 704 pixels across .....= 546 less

Using the HDTV ATSC 1250 pixel ratio,....546 is a greater number than 226

Using the EDTV ATSC rating of 704,....1024 pixels across is 320 more than ED but 226 less than 1250, HD.

with 1024 pixels across, a
226 (difference) is closer to 1250 (HD) compared to a
320 (difference) over 704 (ED)

& again, it's 48 more vertical than 720p (HD), round it off.

Half empty or half full?
You can see why 768x1024 is rated HDTV.
I would have never bought this set if I felt Panny was misleading or the set was not HDTV.

02-18-2006, 10:11 AM	#1
S0LE_SURVIV0R Watch this in HD! Join Date: Jan 2006 Location: Boston Age: 45 Posts: 287	Half Empty or half full? Why 768x1024 is HD I have been reading here that some people are calling 768x1024 EDTV? I would have never bought this 768x1024 Plasma if it was an EDTV. Yes I'm well aware of 1250 pixels across for the 720p signal. But remember that is an ATSC rating, there is no ATSC format of 768x1024, just as there is no 768x1366. I have monitors with both resolutions. Those who fail to acknowledge that 768x1024 is HD, is cutting the ATSC 1250 across pixel count to fine. Speak in terms of practical purposes. People can also say that a 768x1199 is EDTV if they want to as well. For all practical purposes, when you reach the 720p vertical threshold on a set, you are receiving HDTV, the 720p signal. EDTV is 480p. Plain and simple, Like what FOX used to broadcast before they went to 720p. As my set top box manual says 1080i HDTV 720p HDTV 480p EDTV So it has 1024 pixels per line and not 1250 BFD.....???? But the set also has 768 vertical, 48 more than 720. The ED 480p signal (ATSC) has 704 pixels across. That is the real ED, if a set has 852 across, that is the set up scaling it. if a 480x852 set converts a 720p signal, it is EDTV because it is closer to the EDTV signal of 480x704. If a 768px1024 set receives a 720p signal, it is HDTV, because the resolution neighbors the 720p x 1250 HDTV signal. So this isn't a case of,....... is the glass half empty or half full. It doesn't fall in the middle. 480px704 EDTV 240 vertical rows short of the ATSC rating of HDTV 704 pixels across .....546 pixels short of the ATSC rating of1250 A 480x852 monitor =EDTV Vertical rows match 480 148 more pixels across. Up or down scales. It neighbors the 480px704 EDTV signal 720p signal HDTV 720 vertical 1250 across. A 768x1024 set. 48 more vertical rows of resolution. 226 less pixels per line across. VERTICAL Compare that to the ATSC ED rating of 480p vertical rows 288 more vertical & 48 more up & down than their HD 720p rating. Horizontal Now using the 1250 pixels across ratio, ...compare 226 less pixels per line across less on the 768x1024 set to the EDTV rating of 704 pixels across .....= 546 less Using the HDTV ATSC 1250 pixel ratio,....546 is a greater number than 226 Using the EDTV ATSC rating of 704,....1024 pixels across is 320 more than ED but 226 less than 1250, HD. with 1024 pixels across, a 226 (difference) is closer to 1250 (HD) compared to a 320 (difference) over 704 (ED) & again, it's 48 more vertical than 720p (HD), round it off. Half empty or half full? You can see why 768x1024 is rated HDTV. I would have never bought this set if I felt Panny was misleading or the set was not HDTV. __________________ Sony 40 LCD flat panel XBR & Panasonic 37 768p Plasma HD TIVO The human eye can barely perceive a 1366x768 resolution 10 feet away from a 50 inch see http://proav.pubdyn.com/2005_January...rallaxview.htm 720p Fastest & Best Temporal Resolution Sony "The world's greatest high definition television" Last edited by S0LE_SURVIV0R; 02-18-2006 at 10:41 AM.