Re: [multrans] [MBONED] Carriers' IPTV uses multicast vs unicast, OTT/HTTP
Susan Hares <susan.hares@huawei.com> Thu, 22 December 2011 23:24 UTC
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From: Susan Hares <susan.hares@huawei.com>
To: "Lee, Yiu" <Yiu_Lee@Cable.Comcast.com>, Tina TSOU <Tina.Tsou.Zouting@huawei.com>, "mboned@ietf.org" <mboned@ietf.org>, "multrans@ietf.org" <multrans@ietf.org>
Thread-Topic: [MBONED] Carriers' IPTV uses multicast vs unicast, OTT/HTTP
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Date: Thu, 22 Dec 2011 23:22:52 +0000
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Subject: Re: [multrans] [MBONED] Carriers' IPTV uses multicast vs unicast, OTT/HTTP
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Yiu: My understanding is that the buffering of the live event is at the source - just like a video would be recorded. The actual deliver uses the multicast infrastructure to be efficient. Am I clearer this time? Maybe I need to drink more coffee. Cheers, Sue -----Original Message----- From: Lee, Yiu [mailto:Yiu_Lee@Cable.Comcast.com] Sent: Thursday, December 22, 2011 6:21 PM To: Susan Hares; Tina TSOU; mboned@ietf.org; multrans@ietf.org Subject: Re: [MBONED] Carriers' IPTV uses multicast vs unicast, OTT/HTTP AFAIK, the major push to use multicast is to preserve bandwidth. I don't see how buffering would make multicast even more favorable. If so, I would like to know why. On 12/22/11 6:16 PM, "Susan Hares" <susan.hares@huawei.com> wrote: > Yiu: > >Wow! Thanks for the quick response. I was a bit unclear. > >My understanding is that the buffering actually pushes things toward >the multicast model. > >Sue > >-----Original Message----- >From: Lee, Yiu [mailto:Yiu_Lee@Cable.Comcast.com] >Sent: Thursday, December 22, 2011 6:12 PM >To: Susan Hares; Tina TSOU; mboned@ietf.org; multrans@ietf.org >Subject: Re: [MBONED] Carriers' IPTV uses multicast vs unicast, >OTT/HTTP > >Hi Sue, > >I think it really depends whom you speak to. Buffering can be done in >different places (e.g., broadcast stations put 5 sec delay in their >live streams). This requirement alone won't require unicast streaming. > >Cheers, >Yiu > > >On 12/22/11 6:07 PM, "Susan Hares" <susan.hares@huawei.com> wrote: > >> Yiu Lee: >> >>Many people who I asked about live feeds, said the live feeds were >>often shifted 5-20 minutes and then done as normal video streaming. >> >>Is this true? >> >>Thanks, and If I don't hear from you.. Merry Christmas, >> >>Sue >> >>-----Original Message----- >>From: Tina TSOU >>Sent: Thursday, December 22, 2011 6:05 PM >>To: Lee, Yiu; mboned@ietf.org; multrans@ietf.org >>Subject: RE: [MBONED] Carriers' IPTV uses multicast vs unicast, >>OTT/HTTP >> >>Yiu, >>You address my puzzle. Thanks and Merry X'mas! >> >> >>Best Regards, >>Tina TSOU >>http://tinatsou.weebly.com/contact.html >> >> >>-----Original Message----- >>From: Lee, Yiu [mailto:Yiu_Lee@Cable.Comcast.com] >>Sent: Thursday, December 22, 2011 2:50 PM >>To: Tina TSOU; mboned@ietf.org; multrans@ietf.org >>Subject: Re: [MBONED] Carriers' IPTV uses multicast vs unicast, >>OTT/HTTP >> >>For OTT providers, unicast is the current option to deliver live >>content because inter-domain multicast is uncommon. Speaking of trend, >>using unicast for broadcasting is inefficient IMHO, so I don't see why >>using http to deliver live content is the trend. >> >>My 2 cents. >> >> >>On 12/22/11 2:52 AM, "Tina TSOU" <Tina.Tsou.Zouting@huawei.com> wrote: >> >>>Hi, >>>Someone mentioned that it seems the trend that carriers' IPTV uses >>>unicast, OTT/HTTP, rather than multicast. >>>Thoughts? >>> >>>Sent from my iPad >>>_______________________________________________ >>>MBONED mailing list >>>MBONED@ietf.org >>>https://www.ietf.org/mailman/listinfo/mboned >> >
- Re: [multrans] [MBONED] Carriers' IPTV uses multi… Susan Hares
- Re: [multrans] [MBONED] Carriers' IPTV uses multi… Susan Hares
- Re: [multrans] [MBONED] Carriers' IPTV uses multi… Susan Hares
- Re: [multrans] [MBONED] Carriers' IPTV uses multi… Manfredi, Albert E