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General discussion

Comcast cable HDMI source won't support 2 AVR HDMI outputs

by tmeeker Oct 18, 2008 3:44PM PDT

I have a Denon AVR-4308CI with 2HDMI outputs.
Using DVD player as source, I can route the DVD display to each of 2 TVs via the 2 receiver HDMI outputs. However, when using Comcast cable as the source, the display only shows up on 1 TV - the other TV gets the picture briefly then goes away. Does anyone know whether the Comcast box somehow resricts connection to a single destination ?
Is there a related difference in Comcast boxes or firmware versions ?
Any workaround available ?
Thanks.

Discussion is locked

3 Posts
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Easy to explain.
by r. proffitt Former Forum moderator Oct 18, 2008 10:46PM PDT

MPEG streams cost per stream. While there is no technical reason for it not to work the license fees demanded from mpegla.com mean you cut it to a single working connection at a time to reduce costs.

If there is a workaround, I don't know about it. But I can write with authority the license and cost issue since I was on a project that used such a license.
Bob

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Comcast MPEG stream on HDMI
by tmeeker Oct 24, 2008 10:47AM PDT

So Comcast uses MPEG stream for its HDMI data ?
Does a BluRay player also use MPEG or does it use some other format ?

The AVR apparently has no problem creating the 2nd HDMI output for BluRay. I'm wondering whether it's the AVR that's avoiding the 2nd MPEG license or Comcast (?).

Ted

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Maybe I cut that too finely?
by r. proffitt Former Forum moderator Oct 24, 2008 11:25AM PDT

The licenses for almost all video connections are per live connection. So if you have more than one at a time working you pay for such a license. I offered this so you would know there is no technical reason stopping such things.
Bob

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