zed260Premium
join:2007-09-30
Cleveland, TN
kudos:1 Reviews:
 ·Charter
| reply to webjock1
Re: Not Buying It coax can compete with fiber
if you push coax to its limits it can support quite a bit a 3 gigherts plant combined with switch digital video and mpeg4 and docsis 3 could easely support
100 megabit internet upload and download both
and support around 1000 hd channels plus have a lot more bandwidth left to use |
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RadioDoc58ef2c0Premium,ExMod 2000-03
join:2000-05-11 | Correction: Coax neighborhood distribution can compete with fiber, for now. Without fiber feeds to the neighborhoods, however, cable would still be stuck in the 80's. At some point the limitations of analog RF distribution (which is what "digital cable" rides on) will become unmanageable and the entire plant will have to be converted to true wideband operation without having it carved into 6 MHz channels. 3 GHz over coax is not trivial and unlikely. 100 megabit upload at the customer is a pipe dream without fiber. |
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| DOCSIS3 does support > 100Mbps speeds though.
In the real world this would of course be less with noise and the like, but this is largely because they are using the outdated 5-42MHz return path.
1GHz over coax is very much doable and if the video moves to MPEG-4 there will be even more room for data services. |
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Lazlow
join:2006-08-07
Saint Louis, MO | Eat Me
Last I heard nobody has been able to make upstream channel bonding work in a real environment.
I suspect that MPEG-4 (really X.264) may be more about increasing the HD quality(reducing the noticeable compression effects) without using any more bandwidth, rather than decreasing the (total) video bandwidth(same amount of bandwidth used, just at much higher quality picture). |
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