So I'm about to buy myself a nice 1920x1080 3D projector, for some 3D gaming, it all sounds very nice, especially after I bought myself an HD 7970 card (maybe I'll even get a second one). Then I found out that 1080p 3D is bottlenecked by the HDMI interface to a max of 24fps per eye, that was a major turnoff, since the difference to 1080p and 720p is actually pretty noticeable on big big screens. Ofc 1080p 60 fps 3D would be fully supported if I used the Display Port cable, but... there are no projectors with Display Ports on my budget as far as I can tell.
But then someone tells me HD 7970 supports 1080p 3D via HDMI, it sounded odd, they mentioned it on a review. So I went to AMD's website to check that, there I found some neat .pdf file takling about it:
http://www.amd.com/us/Documents/DisplayTechnology_whitepaper.pdf
Now here's the excerpt of what's important:
This looks pretty straightforward, eh? Not so much, since I've still got one big question: does that mean it will work like that on future displays, with newer HDMI chips or all the current and previous HDMI 1.4 displays we have and had on the market?
If anyone can shed a light on this matter, plz, make yourself noted! Thanks!
But then someone tells me HD 7970 supports 1080p 3D via HDMI, it sounded odd, they mentioned it on a review. So I went to AMD's website to check that, there I found some neat .pdf file takling about it:
http://www.amd.com/us/Documents/DisplayTechnology_whitepaper.pdf
Now here's the excerpt of what's important:
Quote:
HDMI® Stereo 3D Packed Frame
The HDMI® 1.4a specification provides a method to support Stereo 3D display
devices. This specification provides a mechanism for the source device, in
this case the GPU, to convey frame polarity information, while maintaining full
resolution. The majority of stereo 3D TVs released in the market since 2009 support
the HDMI® 1.4a specification. Today, monitors support stereo 3D through HDMI®.
Similar to AMD’s quad buffer described in the preceding section, every stereo
image pair is assembled into a standard format known as a packed frame. The GPU
creates a buffer that is twice the height of the resolution of the frame, with active
space in between. As per the specification, the top half of the packed frame is
reserved for the left eye view, while the bottom is reserved for the right eye view.
After both frames are packed into one double-height frame, the GPU will then send
it over the HDMI® link as a packed frame. Once the TV receives this packed frame,
it is then unpacked and typically presented to the viewer in a frame sequential or
page flipped manner. Since the polarity of each frame is known, the display can
reliably control the emitter to send the correct signal to the shutter glasses.
The Radeon™ HD 7700-7900 Series GPUs are the first in the world to support all of
these packed frame 3D modes:
> New - 1920x1080 @ 60Hz/Eye ( 120Hz total )
> 1920x1080 @ 24Hz/Eye ( 48Hz total )
> 1280x720 @ 60Hz/Eye ( 120Hz total )
> 1280x720 @ 50Hz/Eye ( 100Hz total )
The first mode listed above (1920x1080 @ 60Hz/Eye) is very critical to gamers who want to play games
in stereo 3D. With the 3GHz HDMI® speed supported by the Radeon™ HD 7700-7900 Series GPUs,
higher frame rates (up to 60Hz/Eye) at Full HD resolution can now be transmitted to the display device
resulting in smooth and responsive game-play. Another feature enabled by 3GHz HDMI® speed is
support for 4kx2k resolutions, which will be discussed later.
The HDMI® 1.4a specification provides a method to support Stereo 3D display
devices. This specification provides a mechanism for the source device, in
this case the GPU, to convey frame polarity information, while maintaining full
resolution. The majority of stereo 3D TVs released in the market since 2009 support
the HDMI® 1.4a specification. Today, monitors support stereo 3D through HDMI®.
Similar to AMD’s quad buffer described in the preceding section, every stereo
image pair is assembled into a standard format known as a packed frame. The GPU
creates a buffer that is twice the height of the resolution of the frame, with active
space in between. As per the specification, the top half of the packed frame is
reserved for the left eye view, while the bottom is reserved for the right eye view.
After both frames are packed into one double-height frame, the GPU will then send
it over the HDMI® link as a packed frame. Once the TV receives this packed frame,
it is then unpacked and typically presented to the viewer in a frame sequential or
page flipped manner. Since the polarity of each frame is known, the display can
reliably control the emitter to send the correct signal to the shutter glasses.
The Radeon™ HD 7700-7900 Series GPUs are the first in the world to support all of
these packed frame 3D modes:
> New - 1920x1080 @ 60Hz/Eye ( 120Hz total )
> 1920x1080 @ 24Hz/Eye ( 48Hz total )
> 1280x720 @ 60Hz/Eye ( 120Hz total )
> 1280x720 @ 50Hz/Eye ( 100Hz total )
The first mode listed above (1920x1080 @ 60Hz/Eye) is very critical to gamers who want to play games
in stereo 3D. With the 3GHz HDMI® speed supported by the Radeon™ HD 7700-7900 Series GPUs,
higher frame rates (up to 60Hz/Eye) at Full HD resolution can now be transmitted to the display device
resulting in smooth and responsive game-play. Another feature enabled by 3GHz HDMI® speed is
support for 4kx2k resolutions, which will be discussed later.
This looks pretty straightforward, eh? Not so much, since I've still got one big question: does that mean it will work like that on future displays, with newer HDMI chips or all the current and previous HDMI 1.4 displays we have and had on the market?
If anyone can shed a light on this matter, plz, make yourself noted! Thanks!
