Forum Jump: 
 1Likes
  • 1 Post By mattztt
 
Thread Tools
post #1 of 9 Old 09-24-2018, 12:18 AM - Thread Starter
Member
 
Kreationz's Avatar
 
Join Date: Oct 2013
Posts: 145
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 21
4K projector lag is way behind 1080P lag for projectors (somewhere on the order of 3X worse). I'm looking for a way to overcome this and spending ~$3K for the projection side(not a including screen) isn't an issue. An idea I had would be to take a 4K signal and split it to 4x1080P fed to different display devices in order to take advantage of the lower lag(Example 4xOptoma HD27HDR $2600 total or Acer G550). Lower lag projected at 1/4 screen size giving higher brightness, plus a ALR screen for lights on viewing would seem the ultimate in big screen gaming if such a splitter exists. Any thoughts?
Kreationz is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 09-24-2018, 12:30 AM
Senior Member
 
mattztt's Avatar
 
Join Date: Dec 2007
Posts: 251
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 100 Post(s)
Liked: 129
Quote:
Originally Posted by Kreationz View Post
4K projector lag is way behind 1080P lag for projectors (somewhere on the order of 3X worse). I'm looking for a way to overcome this and spending ~$3K for the projection side(not a including screen) isn't an issue. An idea I had would be to take a 4K signal and split it to 4x1080P fed to different display devices in order to take advantage of the lower lag(Example 4xOptoma HD27HDR $2600 total or Acer G550). Lower lag projected at 1/4 screen size giving higher brightness, plus a ALR screen for lights on viewing would seem the ultimate in big screen gaming if such a splitter exists. Any thoughts?
Video processing adds lag which is why the "game mode" on projectors disables most processing, including basic stuff like keystone correction. I think the processing required to split to to multiple 1080p images would introduce the lag you are trying to avoid.
dfa973 likes this.
mattztt is online now  
post #3 of 9 Old 09-25-2018, 08:37 PM - Thread Starter
Member
 
Kreationz's Avatar
 
Join Date: Oct 2013
Posts: 145
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 21
Quote:
Originally Posted by mattztt View Post
Video processing adds lag which is why the "game mode" on projectors disables most processing, including basic stuff like keystone correction. I think the processing required to split to to multiple 1080p images would introduce the lag you are trying to avoid.
I understand that, but 1080P vs 4K is on the order of 16ms(8.3ms for 120hz signals) vs 54ms or 3x the video lag (other factors keep it from seeming as high), if a video processor adds 32ms (1 frame at 30fps) or less then a 2x2 video wall with low cost (and likely better blacks/color than a high Lumen single projector) might be just what the doctor ordered for gaming with the lights on at 150".

Note: After some research, I found it adds exactly one frame (~16ms at 60fps and double that at 30fps). So 4k/60 is possible at ~32ms lag total.

The bad news $1900+$2600=~$4500 not including extra cables and mounting hardware etc... I think I may just buy two PJ's one 1080P $650 for gaming and a second for 4K <$2000 for video/non-lag dependent gaming.
Kreationz is offline  
Sponsored Links
Advertisement
 
post #4 of 9 Old 09-25-2018, 10:31 PM
Senior Member
 
mattztt's Avatar
 
Join Date: Dec 2007
Posts: 251
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 100 Post(s)
Liked: 129
Quote:
Originally Posted by Kreationz View Post
I understand that, but 1080P vs 4K is on the order of 16ms(8.3ms for 120hz signals) vs 54ms or 3x the video lag (other factors keep it from seeming as high), if a video processor adds 32ms (1 frame at 30fps) or less then a 2x2 video wall with low cost (and likely better blacks/color than a high Lumen single projector) might be just what the doctor ordered for gaming with the lights on at 150".

Note: After some research, I found it adds exactly one frame (~16ms at 60fps and double that at 30fps). So 4k/60 is possible at ~32ms lag total.

The bad news $1900+$2600=~$4500 not including extra cables and mounting hardware etc... I think I may just buy two PJ's one 1080P $650 for gaming and a second for 4K <$2000 for video/non-lag dependent gaming.
The current e-shift JVC projectors are already in that ballpark and early rumors are that their new line of native 4k projectors will be similar. We'll find out for sure when review units become available in the next few weeks.
mattztt is online now  
post #5 of 9 Old 09-25-2018, 10:38 PM
AVS Forum Special Member
 
markmon1's Avatar
 
Join Date: Dec 2006
Posts: 3,211
Mentioned: 50 Post(s)
Tagged: 0 Thread(s)
Quoted: 2624 Post(s)
Liked: 1514
Yea JVC 4K supposedly clocks in around 28ms lag. Will be interesting to see where the new RS1000/2000/3000 line falls.
Gaming on native 4K looks tons better than at 1080p. In fact, 4K is very subtle for anything but gaming. If you game a lot, native 4K is probably the #1 feature you want in a projector. Perhaps the projectors you're looking at are just too low end? The only native 4K projectors right now are JVC's new line and Sony's 4K line.

Video: JVC RS640 135" screen in pure black room no light, htpc nvidia 1080ti.
Audio: Anthem mrx720 running 7.1.4, McIntosh MC-303, MC-152, B&W 802d3 LR, B&W HTM1D3 center, B&W 805d3 surround, B&W 702S2 rear, B&W 706s2 x 4 shelf mounted for atmos, 2 sub arrays both infinite baffle: 4x15 fi audio running on behringer ep4000 + 4x12 fi audio running on 2nd ep4000.
markmon1 is online now  
post #6 of 9 Old 10-02-2018, 06:24 PM
AVS Forum Addicted Member
 
HeadRusch's Avatar
 
Join Date: Nov 2003
Posts: 10,340
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 217 Post(s)
Liked: 160
And 4K is enough of a resolution jump over 1080p that at Projector screen sizes you will see a significant improvement in visuals. Many of the games that look amazing at 4K/65" degrade noticeably when I blow them up at 1080p to 110" or so......so yeah, I'm also waiting for low-lag 4K in the sub $3k range......and waiting patiently.

Xbox Live / PS3 / Steam: HeadRusch1
Keeping the world safe from the evil antics of Bernie Tanaka and Mel Fujitsu since 1986

HeadRusch is offline  
post #7 of 9 Old 10-04-2018, 10:51 AM
AVS Forum Special Member
 
NoThru22's Avatar
 
Join Date: May 2003
Location: Baltimore, MD
Posts: 9,717
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 379 Post(s)
Liked: 169
The JVC 440 looks amazing and has 20 ms less lag than my old Optoma 1080p and Onkyo combo (I got a Denon this time.)

Your mom is a classy lady!

Tom's Book Blog

PSN: Macello / Xbox: Macello
NoThru22 is offline  
post #8 of 9 Old 10-12-2018, 10:42 AM
Advanced Member
 
jedi1982's Avatar
 
Join Date: Jan 2013
Location: MO
Posts: 675
Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 220 Post(s)
Liked: 483
I've not had any lag issues with my Epson 5040UB albeit it's the 4k e-shift. However, unless you have a top of the line true 4k projection image next to this one, when sitting at the proper distances you wouldn't be able to tell any difference anyway
jedi1982 is offline  
post #9 of 9 Old 10-20-2018, 11:03 AM - Thread Starter
Member
 
Kreationz's Avatar
 
Join Date: Oct 2013
Posts: 145
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 21
Quote:
Originally Posted by NoThru22 View Post
The JVC 440 looks amazing and has 20 ms less lag than my old Optoma 1080p and Onkyo combo (I got a Denon this time.)
I'm likely going Denon this time as well (likely the AVR-X6400H) and going for the Optoma HD27HDR (16ms for 1080P/60 w/HDR and 8.3ms at 120hz via firmware update) for gaming and the UHD51ALV for 4K.
Kreationz is offline  
Sponsored Links
Advertisement
 
Reply Home Theater Gaming



Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off