Any 240Hz input TV's out there?
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OK, i'm gonig to try and organize this all in my head. There are some conflicting statements.


1. DVI dual link is still slower than hdmi.
2. nVision can do 3D at 1080p and 60Hz...over HDMI or DVI.
3. However, when using frame packing and letting a 3D ready TV sort it out the best you can do is 60Hz at 720...or 24Hz at 1080.

I DONT GET IT! :)

It seems to me that either way with numbers 2 or 3 you are using the same bandwidth. . This doesnt make any sense to me. The bandwidth used will be the same, right!!? Why is this?


Can any of nvidias products drive 3 monitors in 3D at 1080p? Just curious.
OK, i'm gonig to try and organize this all in my head. There are some conflicting statements.





1. DVI dual link is still slower than hdmi.

2. nVision can do 3D at 1080p and 60Hz...over HDMI or DVI.

3. However, when using frame packing and letting a 3D ready TV sort it out the best you can do is 60Hz at 720...or 24Hz at 1080.



I DONT GET IT! :)



It seems to me that either way with numbers 2 or 3 you are using the same bandwidth. . This doesnt make any sense to me. The bandwidth used will be the same, right!!? Why is this?





Can any of nvidias products drive 3 monitors in 3D at 1080p? Just curious.

#16
Posted 07/23/2010 06:11 PM   
1. Slower? I dont understand.
2. Only over dual link DVI.
3. This is the standard, 1080P@24, 720P@60 (and a few others).
1. Slower? I dont understand.

2. Only over dual link DVI.

3. This is the standard, 1080P@24, 720P@60 (and a few others).

#17
Posted 07/23/2010 09:03 PM   
Can any of nvidias products drive 3 monitors in 3D at 1080p? Just curious.

Sure That's 3D vision surround. It just wont work with the new HDMI 1.4 3D TV's.
Can any of nvidias products drive 3 monitors in 3D at 1080p? Just curious.



Sure That's 3D vision surround. It just wont work with the new HDMI 1.4 3D TV's.

#18
Posted 07/23/2010 09:04 PM   
wikipedia lists dual link dvi as 7.92 Gb/s and for hdmi 8.16 Gb/s(video only) 10.2 overall. By #1 I just mean more bandwidth.
wikipedia lists dual link dvi as 7.92 Gb/s and for hdmi 8.16 Gb/s(video only) 10.2 overall. By #1 I just mean more bandwidth.

#19
Posted 07/23/2010 09:11 PM   
[quote name='CamJ256' post='1092441' date='Jul 23 2010, 11:11 AM']OK, i'm gonig to try and organize this all in my head. There are some conflicting statements.


1. DVI dual link is still slower than hdmi.
2. nVision can do 3D at 1080p and 60Hz...over HDMI or DVI.
3. However, when using frame packing and letting a 3D ready TV sort it out the best you can do is 60Hz at 720...or 24Hz at 1080.

I DONT GET IT! :)

It seems to me that either way with numbers 2 or 3 you are using the same bandwidth. . This doesnt make any sense to me. The bandwidth used will be the same, right!!? Why is this?


Can any of nvidias products drive 3 monitors in 3D at 1080p? Just curious.[/quote]

Yes theoretically there is enough bandwidth to support 3D at 1080p and 60Hz over HDMI.
However the resolution is not in the HDMI 1.4 required in the standard.
There could be many reasons for it's exclusion, these decisions are rarely made on teechnical merit. More usually it's what can the manufacturers can practically get to market in the release window. It probably has to do with the combination of the ammount of memory a display has to have to deal with this input signal (2x what's required for 720P), and the chips used to decode the incoming signal that will be available within the HDMI 1.4 timeframe.
[quote name='CamJ256' post='1092441' date='Jul 23 2010, 11:11 AM']OK, i'm gonig to try and organize this all in my head. There are some conflicting statements.





1. DVI dual link is still slower than hdmi.

2. nVision can do 3D at 1080p and 60Hz...over HDMI or DVI.

3. However, when using frame packing and letting a 3D ready TV sort it out the best you can do is 60Hz at 720...or 24Hz at 1080.



I DONT GET IT! :)



It seems to me that either way with numbers 2 or 3 you are using the same bandwidth. . This doesnt make any sense to me. The bandwidth used will be the same, right!!? Why is this?





Can any of nvidias products drive 3 monitors in 3D at 1080p? Just curious.



Yes theoretically there is enough bandwidth to support 3D at 1080p and 60Hz over HDMI.

However the resolution is not in the HDMI 1.4 required in the standard.

There could be many reasons for it's exclusion, these decisions are rarely made on teechnical merit. More usually it's what can the manufacturers can practically get to market in the release window. It probably has to do with the combination of the ammount of memory a display has to have to deal with this input signal (2x what's required for 720P), and the chips used to decode the incoming signal that will be available within the HDMI 1.4 timeframe.
#20
Posted 07/23/2010 10:40 PM   
Hdmi 1.3 and 1.4 do have enough bandwidth for frame packing 1080p60 and I've read very reliable information saying frame packing 1080p60 is indeed specified in hdmi 1.4 standard.
The issue is that it is not mandatory which means TV manufacturers do not need to implement it.

The DVI single link to dual link bandwidth increase is due to the fact Dual link acts like having two DVI cable running in parallel. every 1 clock cycle you transmit 2 bits.
There is no such a thing in hdmi 1.3 or 1.4. There used to be a dual-link version of hdmi but the connector is 2x bigger and not compatible with hdmi single link so nobody ever used it was discarded completely with hdmi 1.4.
The Hdmi 1.0 to 1.3/1.4 bandwidth increase is entirely due to the clock rate. The more bandwidth is needed the faster the clock goes. Transmitting 720p uses a slower clock rate than transmitting 1080p. (and by the way full 1080p does not need hdmi1.3 bandwidth, checked from hdmi official website)
Even if hdmi 1.3 and 1.4 specifications allow very high clock rates which support up to stereo 1080p, the actual products do not need to implement the maximum rate, they only need to implement hdmi chips with clock rates up to what the TV supports. It makes it easier to manufacture and cheaper.
Hdmi 1.3 and 1.4 do have enough bandwidth for frame packing 1080p60 and I've read very reliable information saying frame packing 1080p60 is indeed specified in hdmi 1.4 standard.

The issue is that it is not mandatory which means TV manufacturers do not need to implement it.



The DVI single link to dual link bandwidth increase is due to the fact Dual link acts like having two DVI cable running in parallel. every 1 clock cycle you transmit 2 bits.

There is no such a thing in hdmi 1.3 or 1.4. There used to be a dual-link version of hdmi but the connector is 2x bigger and not compatible with hdmi single link so nobody ever used it was discarded completely with hdmi 1.4.

The Hdmi 1.0 to 1.3/1.4 bandwidth increase is entirely due to the clock rate. The more bandwidth is needed the faster the clock goes. Transmitting 720p uses a slower clock rate than transmitting 1080p. (and by the way full 1080p does not need hdmi1.3 bandwidth, checked from hdmi official website)

Even if hdmi 1.3 and 1.4 specifications allow very high clock rates which support up to stereo 1080p, the actual products do not need to implement the maximum rate, they only need to implement hdmi chips with clock rates up to what the TV supports. It makes it easier to manufacture and cheaper.

Passive 3D forever
110" DIY dual-projection system
2x Epson EH-TW3500 (1080p) + Linear Polarizers (SPAR)
XtremScreen Daylight 2.0
VNS Geobox501 signal converter

#21
Posted 07/24/2010 04:41 PM   
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