[ultrabrutal]

I was wondering if 768p output is possible via component, at least in some of the versions of the Xbox. Because many have flatscreens with 768p resolution and even with 720p output the result becomes blurry. Before I had a 480p screen and the result there was much better.
So if enabling 768p output is possible, it would be a very good feature

[jmarshall]

No, it's not.

[kraqh3d]

768p is not a standard. Its just a term used to denote the native resolution of some screens. If 720p looks like crap on your set, then its because it has a crappy internal scaler.

[ultrabrutal]

I know 768p is not a standard, but I thought it still might be possible on some combinations of xbox'es and screens.

Don't know about the scaler but it should be fine (LG PC1). Might be the size of the screen which is causing the extra blur I think I'm seeing

[kraqh3d]

Actually, I take back what I said earlier as who is scaling the picture depends on the source material...

I assume you're using Xbmc to upsampling non-HD video to 720p. In this case, Xbmc is responsible for the percieved blurryness. It would be no different even if Xbmc could output in your tv's native resolution.

As a simple test, watch a true HD 720p video stream from either your cable or satellite provider. In this instance, the only scaling being done is by your tv, and its only scaling the video a fraction of a percent. I doubt you'd notice. (I know I dont, but I do get a bit of blurryness from Xbmc.)

Now, if you set Xbmc to 480p, your TV would still have to scale Xbmc's 480p output to its native resolution.

[ultrabrutal]

I was reading though this: http://www.xbox-linux.org/wiki/Xbox_VGA_HOWTO
and found this mention:

"Neoya (http://www.x2vga.com) offers the X2VGA (http://www.x2vga.com) converter for the Xbox which converts the HDTV image information and sync pulses to VGA signals. It supports the 480p (720x480), 720p (1280x720) and 1080i (1920x1080 interlaced) HDTV modes and delivers perfect VGA pictures. Currently Xbox-Linux will only support 480p and 720p as well as some custom resolutions (see below). "

Sync on green, 1024x768, HSync 53.314 kHz, VSync 65.577 kHz:
fbset -g 1024 768 1024 768 32 -t 15200 180 10 20 20 20 5
Modeline: Mode "1024x768" 65.790 1024 1034 1054 1234 768 788 793 813 -hsync -vsync

Internal sync, 1024x768, HSync 60.020 kHz, VSync 75.025 kHz:
fbset -g 1024 768 1024 768 32 -t 12699 176 16 28 1 96 3 -hsync high -vsync high
Modeline: Mode "1024x768" 78.747 1024 1040 1136 1312 768 769 772 800 +hsync +vsync

X2VGA converter, 1024x768, HSync 57,424 Hz, VSync 45,824 kHz
fbset -g 1024 768 1024 768 8 -t 16000 220 40 22 3 80 5
Modeline: Mode "1024x768" 62.501 1024 1064 1144 1364 768 771 776 798 -hsync -vsync

"The exact level of support is as follows:

Conexant: All HDTV modes, with adjustable resolution
Focus: All HDTV modes, but only fixed 480p, 720p, 1080i.
Xcalibur: 480p only"

So if I understand this correctly, the Conexant chip supports 1024x768 output via a VGA adapter.

I guess the Linux driver is open source, so should it not be technically possible to add support for this 768p output somehow? *wishing*
In my case it would require a new Xbox with this chipset (has 1.4 with Focus now), plus the VGA adapter ofcourse (could be self built)

[ultrabrutal]

Actually, I take back what I said earlier as who is scaling the picture depends on the source material...

I assume you're using Xbmc to upsampling non-HD video to 720p. In this case, Xbmc is responsible for the percieved blurryness. It would be no different even if Xbmc could output in your tv's native resolution.

As a simple test, watch a true HD 720p video stream from either your cable or satellite provider. In this instance, the only scaling being done is by your tv, and its only scaling the video a fraction of a percent.

No I'm talking about the XBMC menu. It looks very blurred compared to before. (480p on 480p screen). Video playback looks ok I guess (harder to notice the blur I guess), but the text in the menu looks to me like I need glasses or something

I do not have the option to watch true HD 720p content anywhere, so I will buy a DVI-HDMI cable and compare a HD trailer/movie played from the PC in both 720 and 768p

[kraqh3d]

768p is actually a resolution of 768x1366. And I highly doubt it'll help even if you were to get the VGA output to match your TV's native resolution.

[kraqh3d]

Oh the GUI!. Thats the soften filter. Lower to make the image sharper.

[ultrabrutal]

Yes 1366x768, however getting perfect mapping vertically is more important than horizontally. Most 42" plasma's has 1024x768 16:9 resolutions which would fit this VGA mode perfectly. Most 50" (like mine) has 1366x768 resolution. With 1:1 pixel mapping 3 columns of pixels on each side is turned off (1360x768). Very few screens have true 720p resolution.
If only one of the axis is streeched out, it will be better than both, that's for sure. And yes it's very much visible (subjective). Especially in a static menu the scaling is very much visible. When a movie is roling it's less visible. But playing back a DVD, say 480 or 570p, first it's streeched to 720p and then in the screen it's streeched to 768p which ofcourse adds one level more of blur to the final image.

PS. I have both soften and flicker filters off (both GUI and Video - and they are both set to 720p), so no that's not the reason

[kraqh3d]

You are correct that most 42"s are 768x1024 but that is not 768p. And for comparison, my 50" panny plasma is 768p (768x1366 native resolution) and Xbmc's text looks nice and sharp in 720p mode. I just double checked my configuration and I have soften off, and the flicker filter set to zero. So, then in your case, I would venture to guess the bluriness you're seeing is due to your tv's internal scaler. In this case, using a VGA output matching your tv's native resolution would likely alleviate it but you'd have to use a VGA input. Even if you could output 768p over component, I doubt the tv would accept it.

[ultrabrutal]

According to specs it does not support 768p over component, but it does over DVI/HDMI and VGA. Both 1366x768 and 1024x768.
My Plasma is the LG PC1R.

I think you are right and if XBMC someday would support 1024x768 via VGA, I would get rid off some percentage of the blur.

[spiff]

we can't make the hw magically support something it doesnt..

[elupus]

spiff.. that is abit wrong.. the HD supports alot more than the xdk allows us to use. so in general it's only a matter of the xdk

[spiff]

k - i figured there would be limitations in the video encoder. my bad