Quote:
Originally Posted by davehancock 
The "key" here is that video is distributed to "nodes" (your neighborhood) via fiber - and fiber has much greater capacity. So, in our case "UniversalHD" is distributed to nodes all around Rochester live. When someone in a neighborhood node tunes to "UniversalHD" an available QAM channel is allocated to it and sent out. It's the same hardware as used for on-demand, except the local buffer is not used.

The "key" here is that video is distributed to "nodes" (your neighborhood) via fiber - and fiber has much greater capacity. So, in our case "UniversalHD" is distributed to nodes all around Rochester live. When someone in a neighborhood node tunes to "UniversalHD" an available QAM channel is allocated to it and sent out. It's the same hardware as used for on-demand, except the local buffer is not used.
In urban areas that means within a half block or so of your building (my fiber node is 1/2 block away). I have seen it said that TWCs guideline is 500 customers to a node.
I am curious about your QAM assertion. I don't THINK my STB has a QAM tuner, so my assumption is QAM isn't "needed" for SDV. I associate QAM with a tuning device built into some displays that can "tune" unencrypted channels, both SD and HD by connecting directly to the cable without any form of STB in the path.
The curious thing is that we've been so primed that SDV is the ONLY way... but TWC-NYC just added 2 complete new HD channels and made a part timed one full time with seeming no degradation in PQ on existing HD channels. Losing InHD2 (which is on a pay tier) means they could go with ESPN2 HD as that tier already carries ESPN HD, assuming the business issues don't impede it. At that point, I don't think there are that many "missing" HD channels (i.e. not as widely desired). NOW, I am looking to Mystro more for proper external HD support than ability to use SDV.
















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