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HDHomeRun Bandwidth Usage?
http://forums.linhes.org/viewtopic.php?f=2&t=17409
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Author:  Escher0 [ Wed Dec 12, 2007 10:43 pm ]
Post subject:  HDHomeRun Bandwidth Usage?

I have a quick question that my searches didn't answer. Is the stream coming in from an HDHomeRun already mpeg encoded or does the machine have to do it? On a related note, how much bandwidth will it be using?

I'm not too worried about processing power since my machine has plenty to spare, but I'm thinking of building a front-end only box for another room and I'm worried about bandwidth if the HDHR is recording two shows and Myth is trying to stream a show to the frontend. Will this be a problem at all?

Also, this may be a stupid question but I wanted to double check, a QAM tuner is just an analog tuner like what's in a PVR card, correct?

Thanks.

Author:  Human [ Wed Dec 12, 2007 10:55 pm ]
Post subject:  Re: HDHomeRun Bandwidth Usage?

Escher0 wrote:
I have a quick question that my searches didn't answer. Is the stream coming in from an HDHomeRun already mpeg encoded or does the machine have to do it?

It's MPEG2, because the source from which it captures is MPEG2, whether it's ATSC or QAM.
Escher0 wrote:
On a related note, how much bandwidth will it be using?

The official spec is that you'll need a 100Mbps network to stream two 1080i signals simultaneously. Each 1080i stream runs about 16Mbps, plus any transmission overhead.
Escher0 wrote:
I'm not too worried about processing power since my machine has plenty to spare, but I'm thinking of building a front-end only box for another room and I'm worried about bandwidth if the HDHR is recording two shows and Myth is trying to stream a show to the frontend. Will this be a problem at all?

It sure could be :) With a gigabit LAN, you'd run into no problems, but you could possibly cause bottlenecks on a 100Mbps LAN, depending on your usage and the quality of the equipment/cabling involved.
Escher0 wrote:
Also, this may be a stupid question but I wanted to double check, a QAM tuner is just an analog tuner like what's in a PVR card, correct?

Quite the opposite. QAM and ATSC tuners are digital only. QAM/ATSC tuner devices will not capture NTSC signals.

I hope this helps!

Author:  Too Many Secrets [ Wed Dec 12, 2007 11:07 pm ]
Post subject: 

From my experience... I had trouble at times running my HDHR to my frontend thru a 4 port router. changed to a 4 port 10/100 switch and had no trouble. changed to an 8 port 10/100/1000 switch (needed the ports) and have seen no trouble.

ymmv

Author:  Escher0 [ Wed Dec 12, 2007 11:54 pm ]
Post subject: 

Thanks, that does help a lot. The HDHomeRun (at least in my situation) may not be the incredible solution I thought it might be.

My network setup is...interesting. There's wires run left and right in this house and I'm not sure it will handle the bandwidth since it's not gigabit. I could set up a local subnet just between myth and the HDHR but I'm not sure it's worth the trouble especially if I won't get NTSC signals which is what I'm currently using on my PVRs.

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