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 MattAll noise, no signal.Premium
join:2003-07-20
Jamestown, NC
kudos:12 | reply to espaeth
Re: Lay FTTH said by espaeth:Unicast-based streaming video actually creates a whole new set of distribution problems. Existing broadcast TV options are a single feed with many viewers, so your efficiency improves with every additional viewer. Unicast IP-based streaming video (ala ATT's U-Verse solution) has infrastructure that needs to grow with each and every viewer, and comes with significantly limitations. Verizon is using FiOS to push traditional broadcast video, delivering QAM signaling on copper coax at the subscriber household fed from the ONT. You can hook up as many TVs as you want, and install DVRs like TiVo or Moxi. There is no limitation on the number of channels you can tune. ATT U-verse's IP-based delivery, on the other hand, is limited to 2 HD streams per household total. 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.
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. | |
 espaethDigital PlumberPremium,MVM
join:2001-04-21
Minneapolis, MN
kudos:2
 ·Clear Wireless
| 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. | |
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