[opendtv] Re: IPTV versus internet TV
- From: Tom Barry <trbarry@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Thu, 10 Mar 2005 23:53:39 -0500
Manfredi, Albert E wrote:
To compensate
> for poor jitter characteristics, you end up with huge
> lags between outgoing and incoming, considerably worse
> than what you'd experience over geosynchronous satellites,
> at least for long distance calls.
I lag my Tivo'd "real time" TV viewing by about 20 minutes now just to
skip commercials. I'm not sure there is really a difference anymore
except for very timely news & sports events.
- Tom
> John McClenny wrote:
>
>
>>http://breeze.brightcove.com/p47258018/
>
>
> By the way, I did disagree with one analogy he made early
> on: VoIP for IP-based telephony. He says that VoIP is
> comparable to his video over the Internet.
>
> VoIP is somewhat more comparable to IPTV than it is to his
> video over Internet. Because VoIP is a carefully built
> system designed to emulate the telephone experience, using
> protocols such as SIP and MGCP which very explicitly try to
> emulate use of telephones with keypads, and provides a
> gateway to the PSTN. And many VoIP systems provide an
> interface to your standard analog phone, even.
>
> So VoIP is tied to a provider and tries to emulate an
> existing service, JUST LIKE IPTV. And QoS is managed by
> proper provisioning, which again requires a walling-in
> (and use of MPLS etc.).
>
> Whereas his notion of video over the Internet is just a
> "simple" evolution of the WWW. Using the Internet for a
> telephone-like service has been around for some time, and
> results in pretty bad telephone connections. To compensate
> for poor jitter characteristics, you end up with huge
> lags between outgoing and incoming, considerably worse
> than what you'd experience over geosynchronous satellites,
> at least for long distance calls.
>
> Bert
>
>
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Manfredi, Albert E wrote:
> John McClenny wrote:
>
>
>>http://breeze.brightcove.com/p47258018/
>
>
> By the way, I did disagree with one analogy he made early
> on: VoIP for IP-based telephony. He says that VoIP is
> comparable to his video over the Internet.
>
> VoIP is somewhat more comparable to IPTV than it is to his
> video over Internet. Because VoIP is a carefully built
> system designed to emulate the telephone experience, using
> protocols such as SIP and MGCP which very explicitly try to
> emulate use of telephones with keypads, and provides a
> gateway to the PSTN. And many VoIP systems provide an
> interface to your standard analog phone, even.
>
> So VoIP is tied to a provider and tries to emulate an
> existing service, JUST LIKE IPTV. And QoS is managed by
> proper provisioning, which again requires a walling-in
> (and use of MPLS etc.).
>
> Whereas his notion of video over the Internet is just a
> "simple" evolution of the WWW. Using the Internet for a
> telephone-like service has been around for some time, and
> results in pretty bad telephone connections. To compensate
> for poor jitter characteristics, you end up with huge
> lags between outgoing and incoming, considerably worse
> than what you'd experience over geosynchronous satellites,
> at least for long distance calls.
>
> Bert
>
>
> ----------------------------------------------------------------------
> You can UNSUBSCRIBE from the OpenDTV list in two ways:
>
> - Using the UNSUBSCRIBE command in your user configuration settings at
> FreeLists.org
>
> - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word
> unsubscribe in the subject line.
>
>
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