swhx7
Premium
join:2006-07-23
Elbonia
 ·RoadRunner Cable
| reply to justbits
Re: Boundary cases?
said by justbits  :What happens when everybody in the neighborhood tunes in to a different channel? Sure the possibility of that happening is probably extremely low, but I haven't heard anything about that boundary condition. The probability may not be so low. When the benefits of SDV are described it always seems to be based on the assumption that each customer watches one show at a time for the length of a show, or at least the time between commercials. But what about the practice of just flipping through the channels, one after another, to see what's on? I believe this is very common, and it would seem to defeat the benefits of SDV. |
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MadMANN
Premium
join:2005-08-19
·Comcast
| The probability may not be so low. When the benefits of SDV are described it always seems to be based on the assumption that each customer watches one show at a time for the length of a show, or at least the time between commercials. But what about the practice of just flipping through the channels, one after another, to see what's on? I believe this is very common, and it would seem to defeat the benefits of SDV.
If you really knew how it works, you wouldn't worry too much. With anything new, there are bugs in the beginning, but the benefits will be awesome for everyone once it is actually launched working as it is intended. I, for one, can't wait. |
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nanoflower
join:2002-07-14
30876
| reply to swhx7
Depending on how things are done there's no need for there to be a problem. They could allocate bandwidth that's free for both data and videeo. So if the switched video needs more bandwidth because of people channel flipping or everyone watching another channel then that bandwidth is allocated to video. If not then it gets allocated to data. The data bandwidth would be used for extra data features like Powerboost instead of being a constant data rate booth. |
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sensualpoet
join:2004-09-19
Toronto, ON
·Rogers Hi-Speed
| reply to swhx7
said by swhx7 :said by justbits :What happens when everybody in the neighborhood tunes in to a different channel? The probability may not be so low. ... But what about the practice of just flipping through the channels, one after another, to see what's on? SDV does not have to be implemented as an all-or-nothing strategy. If a node neighbourhhood is 500 TV STBs, and there are 500 channels from the cableco, you'd never get all 500 being used at once. So you could continue to send, via non-SDV, the most popular 100 channels, 24/7 -- and only switch the remaining 400. You'd still save masses of bandwidth which could be recycled for On Demand and HD uses. SDV, other than some software on the STB, is efficient network management magic at the head-end. The "neighbourhoods" can be reconfigured on the fly, if you wanted to, shrunken or enlarged, to suit usage patterns.
Between reclaiming analog spectrum and SDV, coax has a huge amount of life in it yet. |
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