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lol madness
Thanks
Thanks
HDMI max length for Projector 1080p / 4K
- Thread starter pioneer2000
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Here's another good one https://higherlogicdownload.s3.amaz...180611_HDMI_data_rates_for_4K_HDR_formats.png
Suggests ~11gbps which sounds more like it to me.
2160p60 HDR 10 bit 4:2:0 (I think this is what console HDR currently is) = 11.14 gbps
Suggests ~11gbps which sounds more like it to me.
2160p60 HDR 10 bit 4:2:0 (I think this is what console HDR currently is) = 11.14 gbps
isn't the difference down to yuv 4:2:0 4k@60 12Gbs (blu-ray/video) versus rgb 4:4:4 4k@60 18Gbps (games), 10bit
games are natively rgb and need the higher, one, if, the game is natively that; compressing it to yuv woulkd be a disservice.
I thought there was some controvesry about the native format of games though for xbox and other platforms.
'sparklies', per the avforums thread is what you see if the cable is not up to it, on a game, a, static screen will probably not be adequate to test the cable
games are natively rgb and need the higher, one, if, the game is natively that; compressing it to yuv woulkd be a disservice.
I thought there was some controvesry about the native format of games though for xbox and other platforms.
'sparklies', per the avforums thread is what you see if the cable is not up to it, on a game, a, static screen will probably not be adequate to test the cable
I believe both X1X & PS4 Pro use 4:2:0 HDR10 for games, happy to be proven wrong though. UHD Blurays are also 4:2:0. 4:4:4 60hz HDR requires HDMI 2.1.
Back in 2007 or 2008 I did a projector install that required a long HDMI for 1080p. At the time there was lots of talk of 10m being the max reliable distance for 1080p60. I needed 15m for this install.
Tried a fibre optic cable. Hopeless, despite all the due diligence for cable handling etc. The TX/RX converters were flaky. The cable was around £300-£400 at the time. With nothing left to lose, I bought a 15m HDMI cable made by Kramer. Cost about £120 IIRC. It worked fine.
Fibre may have improved, but I'd put my faith in copper and use Cat cable with HDBaseT baluns before I use optical again.
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I'll test out this Redmere cable tonight, my concern is that if it is a 10Gbps Redmere chip, will it limit the signal to that? I.e. if the cable can actually cope with >10Gbps, does the presence of the slower chipset in the cable restrict the signal transmitted?
yes, you are right,
so configuring the Xbox at 4:4:4 8Bit/sdr , would provide the best challenge for the hdmi cable, pushing the 18Gbs threshold.
I mean the innovative One connect cable between conect box and tv
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Right, well it seems that this Redmere lead won't work with Dolby Vision weirdly.
4K 60hz on X1X with Red Dead 2 works fine. Try to open Netflix (4K Dolby Vision) and it just displays a black screen.
Switch back to my amazonbasics bog standard hdmi lead (1m) and it all works fine again.
4K 60hz on X1X with Red Dead 2 works fine. Try to open Netflix (4K Dolby Vision) and it just displays a black screen.
Switch back to my amazonbasics bog standard hdmi lead (1m) and it all works fine again.
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Seems that way...!
It's amazon so i'll get a refund but just goes to show the Redmere cables aren't up to much.
Ordered a 12.5m CSL high speed HDMI instead... so I will abandon the future proofing and just run it with my 1080p projector. For the fun of it I'll see if that cable can do 4K Dolby Vision as well!
It's amazon so i'll get a refund but just goes to show the Redmere cables aren't up to much.
Ordered a 12.5m CSL high speed HDMI instead... so I will abandon the future proofing and just run it with my 1080p projector. For the fun of it I'll see if that cable can do 4K Dolby Vision as well!
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Potentially stupid question but is Netflix on the Xbox running at 4K 60hz Dolby Vision when purely in the menu...? I'd have thought it would be a 24hz?
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Well this CSL cable won’t even display an image at 4K, so definitely no luck here. Going to use this for 1080p on the projector and scrap the future proofing plan. Christ knows what cable one needs to get 18Gbps over that distance!
Why are you surprised it didn't work? You bought a 12.5m cable for what looks like £12.50 according to the Amazon site. That's cheap just for a long HDMI cable, never mind one to do do 4K; and by cheap, I mean cheap but not in a good way. The user reviews also pointed to them being flaky.
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I wasn’t particularly surprised (I said I’d simply test it for interest sake). I would have hoped it’d be able to produce something more than just a black screen (it’s claimed to be 4K 30hz compatible).
I’m still unsure what people use for long runs at 18Gbps (I.e. 4K, Dolby Vision, 60hz)... seems no standard HDMI cable can do that. Maybe Spectra7 cables or CAT 6?
I’m still unsure what people use for long runs at 18Gbps (I.e. 4K, Dolby Vision, 60hz)... seems no standard HDMI cable can do that. Maybe Spectra7 cables or CAT 6?
It has already been discussed in this thread that most of the sellers know sod all about what they're selling. The factories that produce most HDMI cables don't bother to have them properly tested and certified - that means each model and every length - so they either don't bother putting a spec or they lie. More the latter, I fear. There's also the issue of consistency. It's why some of the Amazon reviews show that customers sent back two or three before finally getting one that worked.
All of this is driven by price. Pure and simple.
The companies that do know what they're doing, such as The Media Factory (tmf solutions - see post #2) and Bluejean cables in the US as two examples, they go to great lengths to source properly designed, independently tested, consistent product from reliable and trustworthy manufacturers. But guess what?.... That costs money.
Do you recall when HD TVs started to come on to the market? I do, and I remember reading posts from people who said that the picture was so much better. Yet it turned out they were still using those TVs with SD Freeview, SD Sky, and DVD. I wouldn't be surprised if a large portion of the people posting positive reviews aren't really running proper UHD at all.
If you want something that will absolutely work, and - more importantly - keep on working, then have a chat with Joe or one of his colleagues at tmf. Long UHD HDMI cabling is at the bleeding edge of the development/price curve. Either stick with your plan to keep it at 1080p, or be prepared to kiss a lot of frogs in search of that mythical beast that is the cheap long HDMI cable that really does do UHD at 24/30/60Hz, or dig deep for a guaranteed solution. It's a bit naive though to act all exasperated because this / that or another £20 cable won't do magic.
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It's only a cable though for heaven's sake... with how common 4K projectors are nowadays you'd have thought an affordable cabling solution would be available.
It may look like "just a cable" to you, but what's going on under the surface is far from simple. You've experienced this first hand with the cables you've bought. If it was as simple as "just a cable", then any old bit of wire would do. Clearly that's not the case though, so are you starting to twig on yet that maybe there's more to it than meets the eye?
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Lol, you seem to be taking this personally!
Manufacturers make many wonderful electronics yet it simply seems that buying a cable for a 4K projector is next to impossible without calling in all manner of experts and charts of specifications etc.
I’m surprised that Optoma and the like don’t do bundles with the leads included as it’s almost impossible to determine what will actually work perfectly.
Manufacturers make many wonderful electronics yet it simply seems that buying a cable for a 4K projector is next to impossible without calling in all manner of experts and charts of specifications etc.
I’m surprised that Optoma and the like don’t do bundles with the leads included as it’s almost impossible to determine what will actually work perfectly.