Having worked at one time for a high end pro-audio company, we were sending audio, both digitial and analog over 'cat5' cables, and like denon using a propritory encoded link.  It wasn't ethernet, although we used ethernet cables.
 
Sending audio and video by ethernet...is being done using things like EthernetAV
 
Really whats behind this is....if you dont use the right cables...don't cry to us about things not working right.  The ppl that spec out systems are usually clueless and just go off what the sales and marketing teams say.  So sure...add one of those expensive cables if thats what I need...
 
Too bad they wont be at InfoComm this week....I'd drop in and have a chat about these.


      
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