How come there isn’t any consumer level 720p HD CRT TV?

[Nielo TM]

Is it because to create 720p, the electron gun must hit every phosphor at same time?

[neilmcl]

Try reading the forum a bit more: Samsung WS32Z409TQX HD Ready CRT with HDMI

[Nielo TM]

I read that and that CRT most likely upscale 720p to 1080i like all the American models.

[neilmcl]

Originally Posted by xvn5

I read that and that CRT most likely upscale 720p to 1080i like all the American models.

It must have a minimum of 720 lines to be classed as HD Ready. It'll scale no more or less than any other consumer LCD, plasma etc.

[Nielo TM]

Last time I checked 1080i is HD

[neilmcl]

Originally Posted by xvn5

Last time I checked 1080i is HD

What's your point

[Nielo TM]

Samsung scales 720p to 1080i, so it’s still considered HD.

[neilmcl]

Originally Posted by xvn5

Samsung scales 720p to 1080i, so it’s still considered HD.

Just because you've read some anecdotal and somewhat questionable information in another thread doesn't make it true. And for the record I haven't said that the Samsun isn't HD Ready, I merely said that it has to have a minimum vertical res of 720 lines to apply. After that who cares what it does to handle a 720p or 1080i video signal.

[Nielo TM]

That’s what I want to know (I'm more similar with the America FCC standards). I don’t care about 720p and 1080i, all I want to know is why is there isn’t any true large screen 720p CRT's

PS: 720p and 1080i are classified as HD by both American FCC/ATSC and European standard. So id the Samsung upscale 720p to 1080i, its still considered HD.

[KyoDash]

That’s what I want to know (I'm more similar with the America FCC standards). I don’t care about 720p and 1080i, all I want to know is why is there isn’t any true large screen 720p CRT's

It's largely an issue with costs. To produce a TV which can handle both 1080i and 720p natively without scaling would require the tube to handle completely different sync rates which isn't cheap to do. Multi-sync PC monitor above 21" rise dramatically in price, especially large widescreen versions.

It's inherently easier for manufactuers to simply have a HD CRT do 480p natively and 1080i as the sync rates are very close to each other. Plus it's much cheaper to produce and to maintain quality at larger sizes, without too much flicker and distortion.

Ultimately the closest thing we have right now is a widescreen PC monitor which can handle 480p through to 1080p.

It must have a minimum of 720 lines to be classed as HD Ready. It'll scale no more or less than any other consumer LCD, plasma etc.

Just becaue a CRT TV has 720 lines does not mean that it is capable of true 720p, it still may not be able to sync at the rate required for 720p. Instead it would scale 720p to 1080i using all 720 lines for the interlaced picture. Thus still being classified as HD Ready by UK standards.

[neilmcl]

Originally Posted by KyoDash

Just becaue a CRT TV has 720 lines does not mean that it is capable of true 720p, it still may not be able to sync at the rate required for 720p. Instead it would scale 720p to 1080i using all 720 lines for the interlaced picture. Thus still being classified as HD Ready by UK standards.

All I'm saying is that at the moment there is no evidence, other than the anecdotal, that this new Samsung is scaling 720p to 1080i rather than being able to output at 720p. Who's to say that it's not converting the 1080i input to 540p and then scaled itself.

[KyoDash]

I guess we don't know yet. But if does downscale 1080i to 540p then it's pretty much almost useless as a HDTV.

Ultimately since we're not going to get a true 720p CRT set for at least a couple of years, if they even bother. I'm only really interested to see if this set does 1080i natively and 480p natively.

Any 720p native set will no doubt scale 480p or 1080i, unless they do a true multi-sync tube. So from that point I'll be sticking to 480p for games (hate seeing them interlaced) and 1080i for HD TV and Film content. Or if they make a multi-sync HDCP complient arcade monitor I'll just use that. Sadly one with HDCP is unlikely to be made as nothing in the arcades uses it.

[Nielo TM]

There is no point in investing millions of dollars on a dying technology, instead, it could be spend on developing OLED, FED, SED, Transparent OLED etc…

PS: Sony completely terminated their CRT range.

[Nielo TM]

Originally Posted by neilmcl

All I'm saying is that at the moment there is no evidence, other than the anecdotal, that this new Samsung is scaling 720p to 1080i rather than being able to output at 720p. Who's to say that it's not converting the 1080i input to 540p and then scaled itself.

Evidence is that all American CRT's are 480i/p, 1080i native.

Here's part of my guide on X360 forums

Process of 1080i:
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

Xbox 360 always produces progressive image, which at the moment we should all know. That progressive image is converted to interlace when 1080i has been chosen. The on-board video encoder chip inside the Xbox 360 splits the frames into two separate 540 horizontal fields called the odd field and even field. A 1080i CRT HDTV draws the first 540 odd fields (first frame) followed the 540 even fields (second frame) to produce 1080i@60Hz. This process occurs 60 times per second and it also depends upon the source video meaning it could also be 1080i@30Hz. CRT’s is capable of displaying interlaced signals without De-Interlacing; which produces more defined image.

[neilmcl]

Originally Posted by xvn5

Evidence is that all American CRT's are 480i/p, 1080i native.

Here's part of my guide on X360 forums

Process of 1080i:
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

Xbox 360 always produces progressive image, which at the moment we should all know. That progressive image is converted to interlace when 1080i has been chosen. The on-board video encoder chip inside the Xbox 360 splits the frames into two separate 540 horizontal fields called the odd field and even field. A 1080i CRT HDTV draws the first 540 odd fields (first frame) followed the 540 even fields (second frame) to produce 1080i@60Hz. This process occurs 60 times per second and it also depends upon the source video meaning it could also be 1080i@30Hz. CRT’s is capable of displaying interlaced signals without De-Interlacing; which produces more defined image.

Well that it clears it up then