DVI - HDMI Computer resolutions - 1280 x 720p - 3Fh?

Phil99 · 24 Aug 2007 at 10:54

My parents recently got a new 32" HDTV (Philips 32PFL5322/10) and the supported video modes are:

Computer formats : 640 x 480, 60, 72,75, 85 Hz, 800 x 600, 56,60,72,75,85 Hz, 1024 x 768, 60, 70, 75, 85Hz
Video formats : 640 x 480i - 1Fh, 640 x 480p - 2Fh, 720 x 576i - 1Fh, 720 x 576p - 2Fh, 1280 x 720p - 3Fh, 1920 x 1080i - 2Fh, 1920 x 1080p -

I've just bought a DVI-HDMI adapter that should arrive sometime next week so I can connect my HTPC to the TV. Am I going to have any trouble using 720p from the PC? It'll be from an ATI 9100IGP integrated card via DVI to the HDMI input on the TV...I'm a little confused as to what the '3Fh' means and why it's listed seperately from the computer formats?

sid · 24 Aug 2007 at 13:12

You'll probably want to use 1360X768 at 16:9 with 1:1 pixel mapping.

sid

Phil99 · 24 Aug 2007 at 17:20

Yeah, that'd be what I'd be using in an ideal world but the fact it wasn't listed on the spec sheet and only up to 1024x768 for PC resolutions has me a little confused :confused:

Any reason why a TV wouldn't support its native resolution via HDMI? It seems nice and straight forward to acheive with no scaling etc, so the fact it isn't listed is a bit worrying.

roakes · 24 Aug 2007 at 17:26

Could those resolutions be assuming you are using a VGA in rather than HDMI?

sid · 24 Aug 2007 at 17:30

Phil99 said:
Yeah, that'd be what I'd be using in an ideal world but the fact it wasn't listed on the spec sheet and only up to 1024x768 for PC resolutions has me a little confused Any reason why a TV wouldn't support its native resolution via HDMI? It seems nice and straight forward to acheive with no scaling etc, so the fact it isn't listed is a bit worrying.

If you wanted to hook it via PC, you should have checked it before buying.

Try VGA, that usually works best.

Phil99 · 24 Aug 2007 at 18:06

It wasn't bought by me and the PC connectivity is only to demo some HD stuff that wont play on my XBOX360 for my parents, so no big deal. If I bought the TV for myself I would have checked all this stuff out beforehand, but it wasn't my decision at the end of the day. (it doesn't have VGA)

Phil99 · 24 Aug 2007 at 18:32

Also, regardless of whether it works or not, anyone know what 1Fh/2Fh/3Fh actually mean? I'm guessing it's something to do with refresh rates?

edit: finally found something via Google (Experts Exchange + Google Cache =

)

"1fH" represents the "standard horizontal scanning frequency"
"2fH" represents -twice- the "standard horizontal scanning frequency"
"3fH represents -triple- the "standard horizontal scanning frequency"

http://www.freepatentsonline.com/6292235.html

"adapted to operate at the standard horizontal scanning frequency (1fH) and twice the standard horizontal scanning frequency (2fH). In fact, such receivers will also need to process video signals having a horizontal scanning frequency three times (3fH) the standard frequency."

I ~believe~ standard horizontal scanning frequency is "generically" referred to at 31 kHz, but is most often put to practical use at 31.5kHz -or- 31.7kHz (depending on desired resoulution and accompanying vertical frequency chosen)

Guess I'll just have to try it and see