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Re: AT&T: 15 Mbps Internet connections "irrelevant"

  • From: Joel Jaeggli
  • Date: Sun Apr 02 11:59:40 2006

On Sat, 1 Apr 2006, Simon Lockhart wrote:

On Sat Apr 01, 2006 at 01:26:51PM -0600, Frank Bulk wrote:
The majority of U.S.-based IP TV deployments are not using MPEG-4
Agreed. However, I'd say that any IPTV provider currently using MPEG2 would
be planning a migration to MPEG4/H.264 - half the bandwidth means double the

in fact,
you would be hard-pressed to find an MPEG-4 capable STB working with
I disagree. There are several MPEG4 capable STB available now, and they all
have support of middleware vendors.

SD MPEG-2 runs around ~4 Mbps today and HD MPEG-2 is ~19 Mbps. With ADSL2+
you can get up to 24 Mbps per home on very short loops, but if you look at
the loop length/rate graphs, you'll see that even with VDSL2 only the very
short loops will have sufficient capacity for multiple HD streams.  FTTP/H
is inevitable.
Anyone looking to do HD will be looking at H.264, and looking to bring the
bandwidth requirement down to 8-10Mbps. That is certainly more practical with
ADSL2+ deployments (unless you want more than one STB per DSL).
US homes with digital cable or satellite typically do have more than one STB at this point simply becasue you need one for each TV...

(Currently working on an H.264 IPTV deployment)

Joel Jaeggli  	       Unix Consulting 	       [email protected]
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