[opendtv] Re: What FiOS will offer
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 13 Feb 2006 10:13:37 -0500
Richard Hollandsworth wrote:
> 1. FIOS website currently offers 15 Mbps download for
> about the same price as what i'm currently paying for
> 5 Mbps via RoadRunner.
Perhaps, but that's just the link speed between the last
box in the telco and your premises. Which does not mean
that anyone out there can upload streams at that speed,
nor does it mean that you have 15 Mb/s available to or
from the Internet.
Just like in an office environment, even if your
workstation is connected via Fast Ethernet, this does not
mean that you have 100 Mb/s available to the Internet. At
best, you might have 100 Mb/s available to servers within
your own IP subnet, and that assumes that others aren't
attempting to reach a particular server at the same time
you are.
> 2. HD video via MPEG4 ony requires 8-12 Mbps.
>
> Putting 1 and 2 together means HD Video can enter you
> home without going through a corporate gatekeeper
> (i.e. D*, E*,Cable or even IPTV).
The telco will no doubt set up a system whereby the HDTV
streams will be transmitted using IP multicast, confined
to within the boundaries of the telco's intranet. Which
is the usual way IP multicasts are scoped. That way, only
Verizon or SBC subscribers will have access to these
streams, and the subscriber will get reasonably quick
response time when "tuning in" to a particulare program.
And the telco can more or less guarantee adequate quality
of service, since all of this is inside its own intranet.
But to expect to be able to join some IP multicast group
from the Ukraine, over the Internet, for an HDTV feed, is
unrealistic.
> That is the basic enabling technology (plus faster
> Internet), which will facilitate the next step beyond
> ala carte channels.....ala carte programs. DCAS (or
> equivalent) can take care of security....although there
> are probably many programs that wouldn't care...
I don't think it's going to be anything revolutionary.
What IPTV really attempts to do is to emulate the cable
TV experience. But for non-real-time downloads, that's
in principle possible with any fast connection.
Bert
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