[RndTbl] How Long Can HDMI Cable be Run? -- Blue Jeans Cable

Gilles Detillieux grdetil at scrc.umanitoba.ca
Wed Sep 9 12:35:29 CDT 2015

I share your frustration, but in this case even gigabit Ethernet doesn't 
have the bit rate to support HD resolutions.  HDMI 1.0 is almost 5 Gb/s, 
1.3 is about 10 Gb/s, and 2.0 is about 18. 
(https://en.wikipedia.org/wiki/HDMI)  I suppose they could initially 
have gone with 10 Gb/s Ethernet, but that would have limited future 
growth.  Not to mention that there'd be tons of support issues with 
people trying to use cables not rated for anything over 1 Gb/s or even 
100 Mb/s.  ;-)

More frustrating is the patent encumbrances and associated license fees, 
and inevitable competing standards to try to avoid these.  Or am I 
mistaken that this was one of the motivations behind DisplayPort?

The price gouging on cables in the early days of the standard, before 
there was much competition, was another big frustration, but fortunately 
reasonably short lived.

On 09/09/2015 08:07 AM, John Lange wrote:
> It really makes you wonder why manufacturers always seem to want to 
> reinvent the wheel. Why wouldn't they just use 1G Ethernet? It's an 
> established solid technology with readily available connectors and 
> cables. Easy to work with, good over significant distances... You 
> could even plug it into a switch if you need to go further and you 
> could probably leverage Ethernet multi-cast to feed multiple displays 
> over large distances such as in sports bar.
> John

Gilles R. Detillieux              E-mail: <grdetil at scrc.umanitoba.ca>
Spinal Cord Research Centre       WWW:    http://www.scrc.umanitoba.ca/
Dept. of Physiology and Pathophysiology, Faculty of Health Sciences,
Univ. of Manitoba  Winnipeg, MB  R3E 0J9  (Canada)

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