Re: [AVTCORE] [Technical Errata Reported] RFC3611 (4597)

Alan Clark <alan.d.clark@telchemy.com> Tue, 05 April 2016 18:32 UTC

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To: Magnus Westerlund <magnus.westerlund@ericsson.com>, timur.friedman@lip6.fr, ben@nostrum.com, alissa@cooperw.in, keith.drage@alcatel-lucent.com, roni.even@mail01.huawei.com
References: <20160122061024.2C4AA18046C@rfc-editor.org> <5702A356.1090900@ericsson.com>
From: Alan Clark <alan.d.clark@telchemy.com>
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Date: Tue, 5 Apr 2016 14:32:55 -0400
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Cc: avt@ietf.org, timebow@163.com
Subject: Re: [AVTCORE] [Technical Errata Reported] RFC3611 (4597)
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Hi Magnus

As the author of that section of RFC 3611 I concur that the errata 
report is correct and the suggested change should be made.

Regards

Alan Clark

On 4/4/16 1:24 PM, Magnus Westerlund wrote:
> Hi,
>
> I have looked at this errata. It appears to be correct. I checked 
> Liu's calculation and get the same value. I think the reason the wrong 
> value is in the RFC is due that the authors calculated the 33% loss 
> value and used that to calculate the burst density, rather than 4/12s.
>
> As this can be confusing when implementing I propose that we verify 
> this Errata.
>
> Please provide any feedback on this proposal no later than the 18th of 
> April.
>
> Cheers
>
> Magnus Westerlund
>
>
> Den 2016-01-22 kl. 03:10, skrev RFC Errata System:
>> The following errata report has been submitted for RFC3611,
>> "RTP Control Protocol Extended Reports (RTCP XR)".
>>
>> --------------------------------------
>> You may review the report below and at:
>> http://www.rfc-editor.org/errata_search.php?rfc=3611&eid=4597
>>
>> --------------------------------------
>> Type: Technical
>> Reported by: Liu Yuanlong <timebow@163.com>
>>
>> Section: 4.7.2
>>
>> Original Text
>> -------------
>> burst density 84, which corresponds to 33%
>>
>> Corrected Text
>> --------------
>> burst density 85, which corresponds to 33%
>>
>> Notes
>> -----
>> error calculation for burst density, burst 
>> density=4/12*256=85.33...≈85
>>
>> Instructions:
>> -------------
>> This erratum is currently posted as "Reported". If necessary, please
>> use "Reply All" to discuss whether it should be verified or
>> rejected. When a decision is reached, the verifying party (IESG)
>> can log in to change the status and edit the report, if necessary.
>>
>> --------------------------------------
>> RFC3611 (draft-ietf-avt-rtcp-report-extns-06)
>> --------------------------------------
>> Title               : RTP Control Protocol Extended Reports (RTCP XR)
>> Publication Date    : November 2003
>> Author(s)           : T. Friedman, Ed., R. Caceres, Ed., A. Clark, Ed.
>> Category            : PROPOSED STANDARD
>> Source              : Audio/Video Transport
>> Area                : Real-time Applications and Infrastructure
>> Stream              : IETF
>> Verifying Party     : IESG
>>
>>
>
>