 espaethDigital PlumberPremium,MVM
join:2001-04-21
Minneapolis, MN
kudos:2
 ·Clear Wireless
| reply to Matt
Re: Lay FTTH said by Matt:I think your post was a bit disingenuous. While HFC is absolutely a better solution to deliver video, U-Verse is only limited to 2 HD streams because of the bandwidth of the delivery mechanism. It's not a limitation of IP delivery whatsoever. U-Verse is a best-case scenario for IPTV. It's all contained with the access vendor's network, delivered over multicast, and still you are limited to more compressed HD feeds than your OTA HD sources.
This article was about Web to TV, or Internet based video. Compared to U-Verse, the scenarios are only going to go downhill because multicast isn't widely supported by Internet carriers, leaving unicast delivery being the only viable Internet delivery option.
said by Matt:Expanding upon that, isn't the move to SDV a very similar thing to IPTV? It's a digital stream that is sent on-demand to each STB, rather than being multicasted (or whatever the appropriate cable terminology is) to all customers at all times. SDV is basically dynamic channel assignment. Rather than broadcasting all channels on the wire at the same time, SDV allows channels to be dynamically added to the broadcast group when requested. SDV and multicast have quite a bit in common. Cable QAM SDV, however, doesn't have the IP framing overhead of multicast, and the hardware used to interface with the cable plant is cheaper to manufacture than equivalent IP network hardware. |
