Chance of 15:9 aspect ratio support in future V880 update?

[Bishamon]

I realize that unusual aspect ratios, including 15:9, are supported via DVI, but this support is for the resolution only, and it does not compensate for the aspect ratio. For instance, at 1280x768p (15:9), the DVI output looks incredible except for one small flaw: The 16:9 image is being stretched vertically into the 15:9 display.

With more and more 15:9 (and some 16:10) displays hitting the market, I'm hoping that more aspect ratio options become available besides the standard 4:3 and 16:9. For instance, 15:9, 16:10, and 5:4 would be fairly common ones worth including, IMO.

[Bishamon]

bump

[RayH]

I found it's possible to create a custom resolution with a user defined displayable window within a specific resolution.

I was able to create a 1024x576 displayable window within a 1024x768 resolution allowing me to set the display device in the V880 as 16x9 even though I'm using a 1024x768 projector. The V880 sends a 1024x768 signal but only uses 1024x576 of it for display. I haven't tested other settings but if the V880, set at 16x9 output, fills what it thinks is the displayable window, it should be possible using this method too create any aspect ratio you want.

[Bishamon]

Originally posted by RayH
I found it's possible to create a custom resolution with a user defined displayable window within a specific resolution.

I was able to create a 1024x576 displayable window within a 1024x768 resolution allowing me to set the display device in the V880 as 16x9 even though I'm using a 1024x768 projector. The V880 sends a 1024x768 signal but only uses 1024x576 of it for display. I haven't tested other settings but if the V880, set at 16x9 output, fills what it thinks is the displayable window, it should be possible using this method too create any aspect ratio you want.

Can you describe the method, or which settings you needed to adjust, to achieve this?

[RayH]

I discovered it by accident when playing with custom resolutions. I started with a custom resolution which matched my native display then found that as I reduced the vertical resolution setting on the V880 while leaving everything else the same, it was reducing the displayed window but keeping the resolution signal the same.

[Bishamon]

Originally posted by RayH
I discovered it by accident when playing with custom resolutions. I started with a custom resolution which matched my native display then found that as I reduced the vertical resolution setting on the V880 while leaving everything else the same, it was reducing the displayed window but keeping the resolution signal the same.

Thanks for the information!

I'll have to play around with the settings and see what I can come up with.

[vikur]

Initially I set my V880 for 1280x768 custom resolution for Sceptre LCD TV with following parameters:
HorizFreq___47776 VertFreq___5987
VideoWidth__1280 VideoHeght_0768
HSyncTotal__1664 PreHSync___0064
HSyncActive__0128 PostHSync__0192
VSyncTotal___0798 PreVSync___0003
VSyncActive__0007 PostVSync__0020
HSyncPol____0000 VSyncPol___0001
In this case I had some stretching to set 15:9 aspect ratio.
If I change VideoHeight from 0768 to 0720 with everything the same I have unstretched 16:9 window. Problem is that I have 48 lines of garbage at the bottom of the screen. I think it is possible somehow to change "heght" parameters to center the 16:9 window and reduce a static at the bottom and the top of screen.

[RayH]

Originally posted by vikur
Initially I set my V880 for 1280x768 custom resolution for Sceptre LCD TV with following parameters:
HorizFreq___47776 VertFreq___5987
VideoWidth__1280 VideoHeght_0768
HSyncTotal__1664 PreHSync___0064
HSyncActive__0128 PostHSync__0192
VSyncTotal___0798 PreVSync___0003
VSyncActive__0007 PostVSync__0020
HSyncPol____0000 VSyncPol___0001
In this case I had some stretching to set 15:9 aspect ratio.
If I change VideoHeight from 0768 to 0720 with everything the same I have unstretched 16:9 window. Problem is that I have 48 lines of garbage at the bottom of the screen. I think it is possible somehow to change "heght" parameters to center the 16:9 window and reduce a static at the bottom and the top of screen.

If your LCD has user adjustable fine sync controls you may be able to move the displayed signal down until the garbage disappears. I don't have any garbage in my signal but using the fine sync controls on the projector I'm able to move the whole image up or down. This is assuming that garbage won't appear at the top as you move the displayed image down..

[vikur]

RayH: unfortunately my LCD TV does not have any advanced geometry controls in DVI mode.

[Bishamon]

I tried changing the vertical resolution setting to 720p, and ir resized the image, but all of the black space ended up at the bottom of the screen. Moving the front and back porch values didn't adjust the position, which (for me) was unacceptable as it was not vertically centered.

I also tried increasing the horizonal resolution to all values between 1360 and 1368 pixels, figuring that I might get some overscan at the sides, but end up with the correct aspect ratio. Unfortunately, the signal wouldn't sync properly.


So far, the best solution (for me) is just to have a 16:9 image stretched into a 15:9 display; I am still hopeful that another option will be available in a future firmware update.

[Bishamon]

I figured I'd bump this thread, since more members are taking delivery of their 30" Sceptre (and other) displays that run at 1280x768.

I'm still hoping for a solution, but have been living with a slightly stretched image.

[Bishamon]

It's a year later, and I'm still hoping for a solution short of buying a true 16:9 display (as prices come down, this is becoming tempting).

To be honest, the slightly stretched image isn't that bad; It's only really noticable when there are circles on the screen. Nevertheless, it's frustrating that the image is so close to perfect, apart from this one defect.

[PooperScooper]

It's hard to believe that 1280x768 on your display is not a 16x9 viewing area. The pixels should be retangular instead of square. Pio 50 plasmas are the same way - they use the same resolution. Setting up a custom res on the V880 for 1280x768 doesn't work? Are you saying the "preset" 1280x768 on the V880 doesn't look right? If so, you may need to tweak the settings. There are no standardized video timings for 1280x768. What do other Sceptre owners in the Plasma and LCD Flat panel forum do?

larry