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Re: [codec] #16: Multicast?

"Christian Hoene" <hoene@uni-tuebingen.de> Fri, 30 April 2010 13:01 UTC

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From: Christian Hoene <hoene@uni-tuebingen.de>
To: 'Koen Vos' <koen.vos@skype.net>, "'Raymond (Juin-Hwey) Chen'" <rchen@broadcom.com>
References: <062.7439ee5d5fd36480e73548f37cb10207@tools.ietf.org> <3E1D8AD1-B28F-41C5-81C6-478A15432224@csperkins.org> <D6C2F445-BE4A-4571-A56D-8712C16887F1@americafree.tv> <C0347188-A2A1-4681-9F1E-0D2ECC4BDB3B@csperkins.org> <u2x6e9223711004210733g823b4777y404b02330c49dec1@mail.gmail.com> <000001cae173$dba012f0$92e038d0$@de> <r2q6e9223711004211010gfdee1a70q972e8239fef10435@mail.gmail.com> <001101cae177$e8aa6780$b9ff3680$@de> <t2t6e9223711004211119i6b107798pa01fc4b1d33debf1@mail.gmail.com> <002d01cae188$a330b2c0$e9921840$@de> <CB68DF4CFBEF4942881AD37AE1A7E8C74AB3F4A017@IRVEXCHCCR01.corp.ad.broadcom.com> <4BD11C50.2020206@usherbrooke.ca> <CB68DF4CFBEF4942881AD37AE1A7E8C74AB3F4A270@IRVEXCHCCR01.corp.ad.broadcom.com> <20100424135607.84293hkaa13j1zvr@mail.skype.net> <CB68DF4CFBEF4942881AD37AE1A7E8C74AB3F4A289@IRVEXCHCCR01.corp.ad.broadcom.com> <20100424181620.352034g28cnjr010@mail.skype.net>
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Date: Fri, 30 Apr 2010 15:01:29 +0200
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Cc: codec@ietf.org
Subject: Re: [codec] #16: Multicast?
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>>> Afaik, only RTP headers can be compressed between arbitrary Internet
>>> end points.  You're still stuck with IP and UDP headers.
>>
>> I am aware of a header compression technology for VoIP over Cable
>> applications that can compress the header size to a very small
>> fraction of the original size, but it is probably not widely used.
>
>Yes, header compression works between end-points on a cable.  That's
>different from "between arbitrary Internet end points".

BTW: IP header compression using ROHC is covered by patents ;-)
https://datatracker.ietf.org/ipr/search/?option=title_search&title_search=rohc

Cheers,

 Christian


>
>best,
>koen.
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>codec@ietf.org
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