Hello guys,

is there any scaler that will do a high enough pixel clock to support

1080P 71.93 Hz

and

1080P 75 Hz

and output an analogue signal without any problems ?




I'm asking this here , because this is of interest to CRT FP users only




Thanks


Michael

Not that I know of at the moment, I was hoping the new Lumagen Radiance would do this, after speaking with Jim he said the hardware could probably support, but there are no plans to release this feature.

Currently need a HTPC to do it.

how is it a $1000 computer can do a better scaling job than a $3000 scaler heh

if someone gets a BlackMagic Infinity with stripped HDCP, they have the worlds best scaler/blender IMHO

It's not doing a better scaling job per se, it just doesnt allow pixel clocks high enough to do 1080p72

Best blender??? Have you even seen many blenders? The DVX supports 72Hz output

Cheapest option I'm afraid is the PC, but to achieve timings like that you NEED a pretty current 'rig'. Throw in a HDCP video card and a ton of know-how, you might be halfway to a stable and easy to use HTPC.

Cheapest option I'm afraid is the PC, but to achieve timings like that you NEED a pretty current 'rig'. Throw in a HDCP video card and a ton of know-how, you might be halfway to a stable and easy to use HTPC.


Well, I would need an analogue graphicscard that supports PixelClocks high enough to do 1080P 72 Hz / 75Hz

why, because those DVI/HDMI cards don't support 1080P 72/75Hz

how many gcards are out there , that have analogue out ?


Thanks


Michael


PS what about the playback with computers. I have never seen a perfect setup that has fluent motion ALL the way through.
how hard is it to finetune all those filters, add on tools ?
(ffdshow,dscaler,reclock,...)

Gino is correct, a DVX-8022 easily has the bandwith but needs to upgrade its HD-SDI hardware (& then its software) to 372M or 424M standards.

HDMI is physically incabaple.

It certainly is "incabaple"!. A lot of other descriptive terms apply to it as well. Most of them are uncomplimentary.

Well, I would need an analogue graphicscard that supports PixelClocks high enough to do 1080P 72 Hz / 75Hz

why, because those DVI/HDMI cards don't support 1080P 72/75Hz

how many gcards are out there , that have analogue out ?


Thanks


Michael


PS what about the playback with computers. I have never seen a perfect setup that has fluent motion ALL the way through.
how hard is it to finetune all those filters, add on tools ?
(ffdshow,dscaler,reclock,...)

most new video cards do dual 1536p 75Hz VGA out with a dongle.

tho i was smoking pot when I said its the worlds best scaler hehe

Well, I would need an analogue graphicscard that supports PixelClocks high enough to do 1080P 72 Hz / 75Hz

why, because those DVI/HDMI cards don't support 1080P 72/75Hz

how many gcards are out there , that have analogue out ?

PS what about the playback with computers. I have never seen a perfect setup that has fluent motion ALL the way through.
how hard is it to finetune all those filters, add on tools ?
(ffdshow,dscaler,reclock,...)

You should get a hold of Andres. He was sending 1080p71.91 via DVI from his HTPC to the BlendZilla. He also had it fairly tweaked, tweaked enough to allow the most fluid motion I have ever seen.

You should get a hold of Andres. He was sending 1080p71.91 via DVI from his HTPC to the BlendZilla. He also had it fairly tweaked, tweaked enough to allow the most fluid motion I have ever seen.


I thought that DVI doesn't support 1080P 72Hz , not enough bandwidth. :confused:

Michael

Michael,

The moome DVI card accepts 72 Hz (I tried 1280x1024 @ 72 Hz to each Marquee) and the DVX accepts 1080p over DVI-D (I am feeding 1920x1024 @ 72 Hz to the DVX via DVI-D)... so if:

- You get 72 Hz all accross the chain
- Either feed DVI-D or analog (when Gino was here we tried both DVI-D and RGBHV in to the Marquee, both worked, and we didn't see any subsantial PQ difference)
- and you are EXTREMELLY careful with the custom timings by using reduced blanking and even tweaking those by hand to make sure that the 1080p @ 72 Hz is inside single-channel DVI-D specs...

Then you can have smooth motion. My DVI-D (and RGBHV) cables are relatively long (50 ft each) so I am pushing the limits both in the cable length (the DVX has better DVI-D transmitters than my laptop) and DVI-D single channel bandwidth.

Michael,

The moome DVI card accepts 72 Hz (I tried 1280x1024 @ 72 Hz to each Marquee) and the DVX accepts 1080p over DVI-D (I am feeding 1920x1024 @ 72 Hz to the DVX via DVI-D)... so if:

- You get 72 Hz all accross the chain



well, I need 72Hz with 1080P which is not possible on DVI.

the pixelclock is too high

I also run 1440x960P with 72Hz, pixelclock is relatively low.

but as soon as pixelclock reaches 150MHz and above, then there are all sorts
of image problems.

Michael

Michael,

Try this:
http://www.vesa.org/Public/CVT/CVTd6r1.xls

Make sure you click "Reduced Blanking" and then reduce VERT blank and porches until you get pixel clock south of 165 Mhz (hardcoded limit of DVI-D single channel).

I am using Nvidia 8800 GTX (two of them in SLI), and latest XP driver which allow for custom timings.

Depending on what video-card/driver and DVI-D receiver device (Moome?) you have, you have to make sure the EDID supports weird timngs/resolutions. I have had to overwrite EDIDs more than once to overcome this (Powerstrip -registered version- has an option to write EDIDs).