1080p @ 30 Hz with Prop1 ?

Rayman

I was just looking at the pixel rate requirements for 1080p.

It appears that 30Hz and 24Hz are commonly supported modes.
These only require a pixle rate of 70MHz or so, something the 1024x1024 VGA driver looks like it can handle.

Has anybody tried 1080p yet?

I'd like to get it on my HDTV (it has a VGA input).

ericball

Double check your TV manual - my HDTV doesn't support HDTV resolutions via VGA. (Which I relearned this weekend trying to watch a damaged DVD using my laptop.)

Martin_H

ericball wrote: »

Double check your TV manual - my HDTV doesn't support HDTV resolutions via VGA. (Which I relearned this weekend trying to watch a damaged DVD using my laptop.)

VGA supports more modes and resolutions than a typical HDTV does. But the VGA port contains an I2C bus which allows the PC's graphics card to query the monitor for its display modes. So if you boot the PC connected to the TV can you set the PC to something like 720 or 1080? If you do and it still doesn't work then I get the sneaky suspicion that this is somebody's lame attempt at DRM. The media companies have been trying to plug the analog hole for years and VGA is an analog technology.

Rayman

I know my TV accepts 1080p @60Hz over VGA, I use that a lot. Not sure about 30Hz.
May seem like a moot point, but I'm really after an HDMI connection at 1080p...

If I can get it to work over VGA, I'm pretty sure I can get the HDMI going...
I think, although I'm not sure, that all HDTVs will support 1080p@30Hz over HDMI...

Tor

My TV (quite new) doesn't support high resolutions over VGA, only "old" VGA resolution, even though it's a "full HD" model. That's one reason I'm making sure that any new netbook I buy will have HDMI output.-Tor

potatohead

I've noticed this on newer TV's. We've replaced projectors and screens with HDTV displays where I work, and I've seen a lot of places doing the same.. There are plenty of TV's that DO accept VGA, and I suspect that will continue for some time. HDMI works over conference room distances, assuming a well shielded cable is used.

Many of the TV's that won't do higher resolution VGA, will do YCbCr. Of those, many will do 1080p, all do 1080i, if the TV itself can display it; otherwise, 720p(i) is the upper limit. (in the near future, I may start a thread or two on this)

My own personal HDTV does YCbCr, but does not do VGA. I found the little VGA to HDMI converters work well. If desired, a short VGA cable can be connected to the converter, which then allows a longer run with HDMI. This is superior to a longer VGA cable run, in my experience.

Not sure what the DRM annoyances are associated with this, but HDMI does feature a 24 frame/sec mode for "film". The mode is there for a 1:1 match on analog film recorded movies, and it works as intended, preserving the original cinematography. Seems to me, that slower rate, coupled with a converter, might allow "slow scan" VGA. Just thought I would put it out there.

localroger

Looks like at 1080 res you could get 33 lines of 60 ROM font characters, which is fairly boss and still has a reasonable Hub RAM footprint. According to my computer, my 1080p monitor only does 60Hz though. Even there seems like 16 lines of 30 chars should be achievable with a single cog driver, and that's still pretty boss for a ROM font driver.

Rayman

Well, there is the VGA 1600x1200 driver which appears to have the pixel rate to do 1080p @ 60 Hz.
Probably uses most of the cogs and memory though...