CurtPalme.com Home Theater Forum

[gregstv]

Hi Guys,
I have been out of CRT projectors for the past 5 years. My last projector was a NEC PG9+. I have just picked up a NEC XG75 in near mint condition. Picture of tubes attached. I will be running it from my Onkyo TX-NR809 or my Oppo BDP103. Both have great video processing but I think I am stuck with either 1080i/50 or 1080p/50/60. What would be the best resolution for the XG75?
Thanks,
Greg.

[gregstv]

I didn't mention but it has a Moome DVI card fitted.

[CasetheCorvetteman]

Welcome back

1920x1080i at 60Hz will look quite good mate, i use that with standard timings on my XG 852 when i use the Panasonic 3D bluray player. Ive tried DVDs in their standard resolution as well with very nice results, if your player will automatically select the correct resolution as 768x576p 50Hz.

What part of Australia are you in?

[CasetheCorvetteman]

The OPPO should have the option to spit out 1920x1080i 60Hz for bluray, use that.

[ccaddaddy]

i use 1440x788p looks pretty awesome

[CasetheCorvetteman]

Thats abit low, and still a compromise from anything standard.

[ccaddaddy]

1080i is not an option on my processor

[gjaky]

[CasetheCorvetteman]

Yes, it is. Im amazed its got 1440 width, that is lining up with nothing.

[gregstv]

Thanks for the feedback.
Just down loaded the setup DVD. Now hunting for a good electric screen that will not curl up at the edges. Then I will set it all up.
Greg

[CasetheCorvetteman]

Go to OZ Theatre Screens, i cant recomend them highly enough. Id go for a fixed Majestic screen like the one i have, probably 100" for that projector. Fidelio velvet edges are standard on those screens, and its great quality.

[ccaddaddy]

or i could use my pc. got my hddvd/bluray combo drive going. just used makemkv and it works pretty well. got about 20 movies ripped to my pc!

[CasetheCorvetteman]

Yeah do that, 1440 width is not doind anyone any favours. 1536 width would be better.

[ecrabb]

[CasetheCorvetteman]

PAL region DVDs are 768x576

[ecrabb]

[CasetheCorvetteman]

PAL 15.7kHz broadcast resolution is 768x576, its listed in the specs section of a Panasonic CRT i have here, amongst other places, including the nVIDIA control panel on my computer stating it as that for the TV output.

I struggle to see why DVD as a standard would be less, but there are indeed some DVDs that are not the full 768 width and those have small boarders both sides of the screen. I have never bothered to check it thoroughly enough to see why they had boarders. Some DO fill the width of my screen without amplitude adjustment, and to do that they MUST be 768 width, as it was set using a 4:3 768x576 test pattern.

(768/4)x3=576
(576/3)x4=768

(720/5)x4=576...

[ecrabb]

OK, I see the source of your confusion, Case.

When you refer to PAL "broadcast", you're referring to analog, which doesn't have a horizontal resolution per se. The horizontal resolution is determined by bandwidth, listed in "lines".

PAL digital, i.e. D1, just like DVD, is 720x576., but those are non-square pixels. Let me compare it to NTSC, because that's what I worked with for years before HD simplified everything with square pixels.

If you display an NTSC DVD natively at 720x480 with square pixels, the video will appear slightly stretched horizontally—about 10% too wide. To display a digital 720x480 digital NTSC file on a square-pixel display like on a computer, you have to either squish it a little horizontally and display it at 640x480, or you have to stretch it vertically and display it at 720x540.

PAL is the same way. PAL D1 digital and DVD are 720x576, but those are non-square pixels. If you display that on a square-pixel display, it would appear a little too skinny. So, you have to either stretch it horizontally to 768, or if you wanted to display it at 720, you'd have to compress it vertically to 540. DVD software always did it for you on the fly.

Now, as for why the Panasonic CRT projector made reference to 768x576, I don't know, other than to just suggest that as a square-pixel res. The Nvidia control panel uses the 768x576 square-pixel res, but otherwise, it would look weird on any square-pixel display.

Bottom line is DVD actually is 720x576, and if you want to display it pixel-for-pixel on a square-pixel display, it'll look too skinny, so it has to be stretched horizontally, hence the 768 resolution.

SC

[CasetheCorvetteman]

Yes im following what youre saying, but there are some DVDs i have here that will perfectly fill 768x576, and others that have small side boarders. This is the same for my Samdung DVD player, and also for PC using any program. When using either of my Bluray players, they upscale it to whatever its set to, but those small boarders are still seen on those same movies. If set to auto, it displays exactly what is on the disc, which my XG takes as the source i set up with the 768x576p 50 Hz, and again, boarders the same movies and not the others. Either some DVDs are telling the players to fill the 768 width with the 720 image, or they are infact 768 in width. Which one it is i dont know, ive never given it a thought. I even have a DVD here that will display in a window with boarders all around if you dont change a setting in the player to a 4:3 display.

The Panasonic TV is a direct view set, i havent looked in the rear projection manual to see if it lists the same for the TauGIGA.

Back when i used my Panasonic DVD-A350 i purchased very early in 1998, it seemed to show all movies at full width, however that was on a Panasonic GAOO rear pro TV, and both of those units only had composite as S-video outputs/inputs for the Australian version ( the European versions also had RGB via the SCART terminal, which was locked out in the soft settings on mine ). I cant be sure without modding the A350 for RGB output ( not sure if it can be done as i think parts are left out ) and testing on my XG, to see if indeed the GAOO TV just had a large overscan at the sides.

[dokworm]

60Hz isn't doing any favours either, choose a refresh rate that doesn't give judder, I used to run 96Hz interlaced, or 72Hz, and use your processor or PC you get a refresh rate that is a multiple of 24 (23.976) and live judder free for US discs, and 75Hz for Aussie ones that are at 25fps.