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Please help a noob out, what is the difference?
Thanx
Thanx
HD vs. ED???
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Resolution at a Glance
HD: HIGH-DEFINITION 720p (progressive) or 1080i (interlaced) minimum
Digital Transmission About 5x better than conventional TV.
ED: Enhanced-Definition TV 480p (progressive) & 480i (interlaced)
Digital Transmission About 2x better than conventional TV.
SD: Standard TV
Conventional TV 480i (interlaced)
Analog Transmission Standard for past 60 years.
HD: HIGH-DEFINITION 720p (progressive) or 1080i (interlaced) minimum
Digital Transmission About 5x better than conventional TV.
ED: Enhanced-Definition TV 480p (progressive) & 480i (interlaced)
Digital Transmission About 2x better than conventional TV.
SD: Standard TV
Conventional TV 480i (interlaced)
Analog Transmission Standard for past 60 years.
LMCid did a great job of describing the difference in the signal.
If you were asking about difference in TV's it is a little more gray. A TV can be called a HD by CEA if it displays more than 480 lines( can't remember the exact number but way below 720) and can accept HD signals. Most rear projection CRT displays only display about 500.
There are alot of great ED plasma's out there. It can be hard for people to see the difference between HD and ED if you are comparing the same HD Signal. A HD Plasma is atleast 900 more than a ED plasma. So you have to ask yourself is the HD one worth 900 more, well that depends on you. Some here will argue that HD is the only way to go, other will argue that it is not worth the money.
You have to decide what is most important?
Price
Form Factor
Picture Quality.
If you were asking about difference in TV's it is a little more gray. A TV can be called a HD by CEA if it displays more than 480 lines( can't remember the exact number but way below 720) and can accept HD signals. Most rear projection CRT displays only display about 500.
There are alot of great ED plasma's out there. It can be hard for people to see the difference between HD and ED if you are comparing the same HD Signal. A HD Plasma is atleast 900 more than a ED plasma. So you have to ask yourself is the HD one worth 900 more, well that depends on you. Some here will argue that HD is the only way to go, other will argue that it is not worth the money.
You have to decide what is most important?
Price
Form Factor
Picture Quality.
480i doesn't qualify as ED. It is SD analog, not digital.
I also disagree with "It can be hard for people to see the difference between HD and ED if you are comparing the same HD Signal"
It is very clear if you have two monitors side by side and one is 1080i/720p and the other is 480p. The difference is clear, true HD will ALWAYS win. Don't cheap out and go for ED, you will regreat it in the near future.
I also disagree with "It can be hard for people to see the difference between HD and ED if you are comparing the same HD Signal"
It is very clear if you have two monitors side by side and one is 1080i/720p and the other is 480p. The difference is clear, true HD will ALWAYS win. Don't cheap out and go for ED, you will regreat it in the near future.
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The confusion and argument on this one typically depends upon viewing distance, plus of course the quality of the signal. But at greater than about 7 screen heights viewing distance EDTV or even SDTV might be hard to detect. However HDTV is designed to appear fully detailed without artifacts all the way down to only 3 screen heights viewing distance, where EDTV displays would show obvious pixel structure or raster scan.
- Tom
| I also disagree with "It can be hard for people to see the difference between HD and ED if you are comparing the same HD Signal" |
- Tom
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EDTV is part of the NTSC specification, right? While stating 480i/p this make no comment on aspect format (4:3 vs. 16:9). I previously looked at EDTV as being Widescreen with 480 lines, interlaced or not. And while not part of the NTSC specification-set, I really didn't know it was digital-only in transmission. Very interesting! Does this mean that in order to receive EDTV one needs either a cable/DBS receiver and or an ATSC tuner?
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480i doesn't qualify as ED? This is contrary to what LMCid stated. Can you clarify?
| Originally posted by LMCid Resolution at a Glance HD: HIGH-DEFINITION 720p (progressive) or 1080i (interlaced) minimum Digital Transmission About 5x better than conventional TV. ED: Enhanced-Definition TV 480p (progressive) & 480i (interlaced) Digital Transmission About 2x better than conventional TV. SD: Standard TV Conventional TV 480i (interlaced) Analog Transmission Standard for past 60 years. |
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| Originally posted by miniz 480i doesn't qualify as ED. It is SD analog, not digital. I also disagree with "It can be hard for people to see the difference between HD and ED if you are comparing the same HD Signal" It is very clear if you have two monitors side by side and one is 1080i/720p and the other is 480p. The difference is clear, true HD will ALWAYS win. Don't cheap out and go for ED, you will regreat it in the near future. |
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Just to add to the 'mix', note the horizontal resolution table (about 2/3 down) for various formats developed by Greg Rogers a while back for FP selection. -- John
It is my understanding that 480i qualifies as ED as long as it is digitally processed through a line doubler and shown in a progressive scan display. In any case the signal ends up being 480p when displayed.
Another article about this issue:
http://www.projectorcentral.com/video_signals.htm
Another article about this issue:
http://www.projectorcentral.com/video_signals.htm
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I never used those words I placed in red above. They were words spoken by Miniz, which I quoted in reply.
| Originally posted by mangopony The Ferret: ............. I did not 'cheap out' and do not and will not regret buying a new ED plasma display! It is best in this world if we do not try to judge what is best for others. Happy viewing, my friend. |
My wife wants a flat/thin TV. Price is a major concern. The only sources that would be viewed on the set are from DirecTV SD (S-video) and progressive scan DVD (component). Would ED be acceptable? What advantages would an HD set have using only the sources listed above?
TIA,
Eben
TIA,
Eben
Quote:
An EDTV like a 37" or 42" Panasonic plasma would be ideal for your listed sources, it can do fine with HD sources too from a distance >8feet.
| Originally posted by Eben My wife wants a flat/thin TV. Price is a major concern. The only sources that would be viewed on the set are from DirecTV SD (S-video) and progressive scan DVD (component). Would ED be acceptable? What advantages would an HD set have using only the sources listed above? TIA, Eben |
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I agree, a 480i signal is NTSC which is not the same as EDTV 480P. That said, it is impossible to watch 480i on a fixed panel or most progressive scan displays. The signal gets converted into 480P or some other higher resolution by a scaler; be it the display's internal one, HTPC, external unit, progressive DVD player, etc....
A few years ago this was only available to a few people who were able to afford $20K+ doublers from companies like Faroujda and $30K+ Runco CRT projectors to watch laserdiscs, or other NTSC material. They were watching ED as we know it today at a huge price.
When the HD displays started coming out there was a lot of confusion on whether they were true HD or not. Some people were led to believe that an upconverted signal shown on a display not capable of 720P qualified as HD. The convention for ED then came out to try to erase this mess.
| Originally posted by Joxer EDTV is progressive 480p, NTSC is interlaced 480i - they are not the same. |
A few years ago this was only available to a few people who were able to afford $20K+ doublers from companies like Faroujda and $30K+ Runco CRT projectors to watch laserdiscs, or other NTSC material. They were watching ED as we know it today at a huge price.
When the HD displays started coming out there was a lot of confusion on whether they were true HD or not. Some people were led to believe that an upconverted signal shown on a display not capable of 720P qualified as HD. The convention for ED then came out to try to erase this mess.
LG 55" C9 OLED, Yamaha RX-A660, Monoprice 5.1.2 Speakers, WMC HTPC, TiVo Bolt, X1
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One issue about 480p, is that I don't think it's ever been seen from a broadcast source natively.
480p from a DVD player is natively 480i, as is/was FOX Widescreen. Both are de-interlaced to get 480p.
480p from a DVD player is natively 480i, as is/was FOX Widescreen. Both are de-interlaced to get 480p.
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