Re: Streaming Video across the IT

In article <tph-DC6CE9.17113323062006@localhost>, Tom Harrington
<tph@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

In article <1151100096.483352.77130@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
erniemac@xxxxxxxxxxxxx wrote:

IF my high school physics are correct, it is impossible to stream high
quality video across the internet. The internet uses intermitent
packets to send data. Over but short distances e.g. local networks, the
packet takes 0.8 second to reach the receiver vta sattelite. ON receipt
the packet needs verification before an OK is sent to the sender to
send any more packets. This method is standard DUPLEX protacol, not the
same SIMPLEX as video sent by dedicated telecommunicatios lines used by
commercial TV.

This limitation is independant of bandwidth.

I never run away from a technical discussion !

No? OK, fine.

First off: satellite? Whachoo talkin' about, Willis? Typical DSL and
cable internet connections don't bring satellites into the picture.
Neither do the high-capacity trunks, which rely on fiber optic
connections. Satellite delay isn't really relevant in most cases (if
you have a situation where it is, please elaborate).

Second, verification? Maybe you should read on on UDP. For audio and
video transport you don't need verification, just stream the packets and
do the best you can. See <http://en.wikipedia.org/wiki/Udp> for a
little more information on UDP.

And even if you did use TCP (which most players can, to get around e.g.
firewall issues) you just buffer a few seconds to make sure that any
packets that need to be transmitted have had a chance to be before
they're actually needed.

They're teaching network protocols in high school physics classes now?
Interesting.

--
Jerry Kindall, Seattle, WA <http://www.jerrykindall.com/>

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