[132704] in North American Network Operators' Group
Re: Level 3 Communications Issues Statement ConcerningComcast'sActions
daemon@ATHENA.MIT.EDU (Marshall Eubanks)
Tue Nov 30 09:30:01 2010
From: Marshall Eubanks <tme@americafree.tv>
In-Reply-To: <201011301240.MAA18969@sunf10.rd.bbc.co.uk>
Date: Tue, 30 Nov 2010 09:29:06 -0500
To: Brandon Butterworth <brandon@rd.bbc.co.uk>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Nov 30, 2010, at 7:40 AM, Brandon Butterworth wrote:
>> And before we get too much into HD vs Codecs vs 720P vs 1080p vs
>> "true HD" marketing BS, I capture out of my camera's HDMI port at
>> 3Gbit/s and I am not running 4:4:4 color. So what is HD and what it
>> the allowable compression for it still to be considered as such.
>=20
The US ATSC standard specifies aspect ratios and resolution, but does =
not mention compression (nor
does the FCC).=20
http://www.hdtvprimer.com/ISSUES/what_is_ATSC.html
Since a 19 Mhz on-air channel is allocated to HDTV, but need not be =
fully used, the broadcasters can compress
more and use the remaining bandwidth for data or other "multicast" =
channels (which may or may not have anything to
do with IP multicast).=20
> Whatever marketing feel like, there is no absolute High Definition,
> it's really Higher Definition where the reference is undefined.
>=20
> When access speeds get to 1Gbit/s they'll no doubt be unhappy
> that we may stream something like this -
>=20
> http://www.bbc.co.uk/news/technology-11436939
> =
http://www.bbc.co.uk/blogs/researchanddevelopment/2010/10/super-hi-vision-=
trials
>=20
Just wait till people start doing true holography, where 1 Gbps is =
likely to seem like a rather low bandwidth.=20
Regards
Marshall
> If you make it they will fill it.
>=20
> brandon
>=20
>=20
