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Deploy cost-effective, high-quality video over IPTV

Posted: 17 Nov 2008 ?? ?Print Version ?Bookmark and Share

Keywords:IPTV bandwidth demand? network design challenge? TV over Internet?

IPTV, or TV services delivered over a managed IP network, is expected to skyrocket in the next five years from four million subscribers in 2006 to a projected 103 million in 2011, according to a recent report by analyst firm iSuppli Corp. IPTV is the highest bandwidth service ever deployed into the network.

Along with the rapid increase in subscribers, there are two amplifying trends that will pose significant challenges and opportunities to network designers: video-on-demand (VoD) and the shift to HDTV.

IPTV covers both live TV and stored video. VoD usage today in IPTV systems is a paltry 7 percent; this means that 93 percent of content is broadcast. As service providers continue to roll out time-shift functionality, also known as network digital video recording (DVR), this penetration for VoD should increase from 7 percent to 70 percent or higher. As users shift from watching broadcast TV to VoD, this shift will drive a tenfold increase in the bandwidth used required in the core network.

At the same time, users are shifting toward HDTV. These signals require four to eight times more bandwidth than standard definition (SD) to accommodate the increased resolution of the signal. According to the Consumer Electronics Association, high-definition (HD) penetration in 2006 was 15 percent and is forecast to grow to 60 percent over the next five years. This implies at least a fourfold increase in network bandwidth simply to accommodate this migration.

Taken together, these three trends (increasing IPTV penetration, VoD usage and a migration toward HDTV) mean that the network bandwidth used by IPTV will increase a staggering 1,000 times or 100,000 percent. This rapid growth presents network designers with a set of architecture and design challenges that must be addressed to allow cost-effective, high-quality video deployments.

View the PDF document for more information.





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