Network end users to pull down 2 gigabytes a day, continuously?
tme at multicasttech.com
Wed Jan 10 10:56:27 UTC 2007
On Jan 10, 2007, at 5:42 AM, Mikael Abrahamsson wrote:
> On Tue, 9 Jan 2007, Valdis.Kletnieks at vt.edu wrote:
>> between handling 30K unicast streams, and 30K multicast streams
>> that each have only one or at most 2-3 viewers?
> My opinion on the downside of video multicast is that if you want
> it realtime your SLA figures on acceptable packet loss goes down
> from fractions of a percent into the thousands of a percent, at
> least with current implementations of video.
Actually, this is true with unicast as well.
This can (I think) largely be handled by a fairly moderate amount of
Forward Error Correction.
> Imagine internet multicast and having customers complain about bad
> video quality and trying to chase down that last 1/100000 packet
> loss that makes peoples video pixelate every 20-30 minutes, and the
> video stream doesn't even originate in your network?
> For multicast video to be easier to implement we need more robust
> video codecs that can handle jitter and packet loss that are
> currently present in networks and handled acceptably by TCP for
> Mikael Abrahamsson email: swmike at swm.pp.se
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