North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Multicast Traffic on Backbones
At 21:46 10/06/01 +0100, BrandonButterworth wrote: Just wait a year or two. There are now two companies that I know of (probably others) that do near-on-demand video via multicast:> HOWEVER, most of the 24x7 media sites (CNN, etc.) are doing on-demand > video, rather than streaming a constant feed. http://www.bandwiz.com/ http://www.digitalfountain.com/ By doing clever encoding techniques these companies are able to provide near on demand video streams via a *single* multicast stream. See: http://www.digitalfountain.com/technology/DF_techOverview.pdf - simple overview http://www.digitalfountain.com/technology/DFTechWhitePaper2.9.pdf - detailed geek overview -Hank 1) rights 2) unicast doesn't scale to the sort of audiences of radio/tv broadcasts and if you try it becomes financially unviable too (even with people attempting to fake multicast, e.g. Akamai) One way to manage both is to use the VCR model > On the one > hand, content providers aren't offering 24x7 multicast feeds because there > isn't enough multicast access at the end-points. We offer it regardless but there's not many can use it > Apart from 24x7 broadcast there isn't an obvious killer app. And there's reasonable argument over making the intenet = tv brandon
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