[103988] in North American Network Operators' Group
Re: [Nanog] ATT VP: Internet to hit capacity by 2010
daemon@ATHENA.MIT.EDU (Simon Lockhart)
Mon Apr 21 15:59:24 2008
Date: Mon, 21 Apr 2008 20:57:39 +0100
From: Simon Lockhart <simon@slimey.org>
To: Chris Adams <cmadams@hiwaay.net>, nanog@nanog.org
In-Reply-To: <20080421194314.GE1439925@hiwaay.net>
Errors-To: nanog-bounces@nanog.org
On Mon Apr 21, 2008 at 02:43:14PM -0500, Chris Adams wrote:
> You're a little low. ATSC (the over-the-air digital broadcast format)
> is 19 megabits per second or 8.55 gigabytes per hour.
I think you're too high there! MPEG2 SD is around 4-6Mbps, MPEG4 SD is around
2-4Mbps, MPEG4 HD is anywhere from 8 to 20Mbps, depending on how much wow
factor the broadcaster is trying to give.
A typical satellite TV multiplex is 20-30Mbps for 4-8 channels, depending
on how much the broadcaster pays for higher bitrate, and thus higher quality.
Simon
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