You will not see 48Gbps thru put on any gear in the foreseeable future. No 12-bit HDTV supports full 48Gbps, there are no commercial source devices capable of 48 Gbps, so your concern is a nothingburger.
Gene, this is not correct. 12-bit processing or 8K image are not my concerns at all. Let's forget about those two and not use them at all to make a point about current and future AVRs. Focus is on 4K 10-bit image only.
It's more about new trends in high refresh rates
on 4K 10-bit displays that can take advantage of full 48 Gbps signal from modern graphics cards. There are a lot of commercial source devices capable of 48 Gbps - millions
of graphics cards shipped by Nvidia and AMD can output 4K/144Hz 10-bit RGB/444 image to capable TVs, projectors and monitors over HDMI 2.1. Right now
, not tomorrow.
As I said, we have ever increasing number of sources and sink devices that can handle 48 Gbps signals, from graphics cards in PCs, to TVs and monitors. You will notice this trend in TVs more often this and next year.
Several TCL and Samsung TVs (QN95B and QN90B) already support 4K/144Hz 10-bit image via 48 Gbps port.
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We still do not have a middle-man, AVR, that can handle 48 Gbps. In this small community of AV enthusiasts, we only have you to challenge AVR manufacturers and ask questions about video connectivity innovations. You remember very well what happened with initial new gen of AVRs in 2020/2021 that had faulty 24 and 40 Gbps HDMI chips, to the point that Yamaha had to offer free board exchange and Sound United had to offer HDMI adapter box. Now that AVRs can finally handle 40 Gbps signals in a stable way, the next question is whether they are working in their labs on 48 Gbps chips. It's a legitimate question on innovation and leadership in video connectivity, as we do not buy AVR every other year, but keep it 5 and more years, and so future-proofing on video bandwidth is important.
They need to tell us what exactly is holding them from installing full speed HDMI ports on video boards. Is it heat? Is it again stability and signal integrity? We need engineers to come out on your program and tell us about those challenges. The most honest answer I have heard was from Trinnov engineer a year ago or so, when he mentioned that video boards were not ready for "prime time". That was a good answer - more appreciated than hearing that "nobody" needs 48 Gbps ports.
In conclusion, growing numbers of sources and sinks can handle 48 Gbps, so transmitting and receiving HDMI chips are fine. We are curious to find out what is going on with development of switch and repeater chips, as those have been experiencing more challenges in recent years. Analog Devices have released two 48 Gbps transceiver chips that can be used by soundbars, switches and AVRs. Let's not be anxious to ask questions, even if answers are not coming easily.