Originally Posted by humbland
I'm in a similar situation. Our family/media room was extensively remodeled about 10 years ago. We have a 50' in wall HDMI run from the equipment bay to a cathedral ceiling mounted front projector. At the time, I used the latest HDMI cables, but because of the retrofit, there was no room to install a chase or rigid conduit to act as a cable pull cavity.
Our Sharp Z30K is a 1080p gem, but a huge issue holding me back from a 4K upgrade is the cabeling. It involves ripping up walls and ceilings, including sheetrock and finished woodwork...I've been waiting until the 4K HDMI protocols stabilized and there was more content and projectors available to choose from.
Question: Does anyone know of a reliable 4K wireless HDMI link
(at a reasonable cost)?
I cannot answer your question but I can share both what I have found and what my own feelings on 4K are as it might be useful. From what I can tell, the WiFi HDMI systems are problematic so I have not looked into them beyond that.
As the owner of an HD-DVD player I look at the landscape and would ask if 4K or even DVDs are going to survive. My kids use streaming and that seems to be the trend. Two major manufacturers have pulled out of the player market. And even within the DVD market, the rental part seems to be all SD and HD, not UHD as far as I can tell. In my mind, there is a real question if 4K willend up right there with Betamax or HD-DVD.
You might say that streaming will not be as good as 4K blu ray and you would be right. But have you seen a record store lately? Can you buy CDs at your local Tower Records store? The music world went streaming and now just a few percent of music sales are on CDs. Streaming looks like the future despite its decreased PQ. Most people can't tell the difference or don't care.
Given that it is useful to consider the implication of streaming. In my case I have a Chromecast right at the projector. It is plugged into an audio extractor which is plugged into the projector. That setup can easily support 4K as there is no long HDMI cable. Then the question becomes how to get the audio back to the amplifier. In my case I have a dozen coax cables that make the run as I got my first projector before HDMI was invented. I run audio in one of the coax cables. Coax can carry audio a very long distance. But if you have no coax then you would be looking for a wireless audio system. That is easy for stereo and certainly technically easy for multi channel but I do not know if such a system exists yet. I am quite sure I could make one myself, but that is me and I don't need it so you will never know if I am right.
The other way that seems to work is HDMI over Cat-5 or 6. That was recommended by BestBuy for my setup but as I will explain, I don't care to get 4K so it is not an issue. There is also HDMI over IP which uses existing ethernet cabling rather than a dedicated cable but is much more expensive and looks like it is aimed at businesses that want to go point to multi-point. I am a bit over my head on this but just sharing what I have found. That can go very long distances so it is possible you could find an alternate route to your projector.
Finally, the resolution of 4K used to be a production resolution with final output at a lower resolution. You always want to process at a higher resolution than your output to maintain final PQ. You can find charts that show viewing distance and screen size to see if you can even see the difference. In my case with a 12 foot viewing distance and a 105 inch screen I was in the area of could see better than 1080p but not full 4K so I would not even be able to fully appreciate a 4K signal. But the big thing for me is that these charts are for young eyes and as one gets older you are less able to be able to notice the difference. When I was younger, say in my 50's, I almost never found anyone with better eyesight. At the DMV, I could read the name of the manufacturer on the eye chart at the bottom. Not any more. I have a slight cataract on my right eye so 4K is really overkill. Also, I have glasses but the prescription is so slight that I don't bother. I think the number is 0.5 and basically nobody corrects anything that small. I have them but don't wear them. It just isn't worth the trouble but it would be enough to make it more difficult to be able to tell the difference between 1080p and 4K. Bottom line is although I have a 4K projector, I am not looking to get 4K content.
These are the factors I considered and I share them so you might consider them yourself before you decide to rip up your house.