Re: [AVTCORE] [Technical Errata Reported] RFC4867 (4349)

Magnus Westerlund <magnus.westerlund@ericsson.com> Wed, 06 April 2016 20:08 UTC

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From: Magnus Westerlund <magnus.westerlund@ericsson.com>
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Date: Wed, 6 Apr 2016 17:08:29 -0300
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Cc: Thomas.Belling@nokia.com, avt@ietf.org, "payload@ietf.org" <payload@ietf.org>
Subject: Re: [AVTCORE] [Technical Errata Reported] RFC4867 (4349)
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Payload,

I should have included you from start. Please provide any input on this 
Errata as its relate to an RTP Payload format.

Cheers

Magnus Westerlund
(AVTCORE WG chair)

Den 2016-04-04 kl. 14:39, skrev Magnus Westerlund:
> WG,
>
> I am co-author of this document. If there are any controversy around the
> consensus here I will let my co-chair or the AD judge that.
>
> However, the WG should progress this Errata. It has been created due to
> actual interoperability issues that has been discussed in 3GPP SA4. From
> my perspective the errata also represents the intention of the document.
> Thus I propose that this errata is verified. Please provide any feedback
> by the 18th of April.
>
> Cheers
>
> Magnus Westerlund
>
>
> Den 2015-04-27 kl. 12:57, skrev RFC Errata System:
>> The following errata report has been submitted for RFC4867,
>> "RTP Payload Format and File Storage Format for the Adaptive
>> Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB) Audio Codecs".
>>
>> --------------------------------------
>> You may review the report below and at:
>> http://www.rfc-editor.org/errata_search.php?rfc=4867&eid=4349
>>
>> --------------------------------------
>> Type: Technical
>> Reported by: Thomas Belling <Thomas.Belling@nokia.com>
>>
>> Section: 8.1
>>
>> Original Text
>> -------------
>>        mode-set: Restricts the active codec mode set to a subset of all
>>                 modes, for example, to be able to support transport
>>                 channels such as GSM networks in gateway use cases.
>>                 Possible values are a comma separated list of modes from
>>                 the set: 0,...,7 (see Table 1a [2]).  The SID frame type
>>                 8 and NO_DATA (frame type 15) are never included in the
>>                 mode set, but can always be used.  If mode-set is
>>                 specified, it MUST be abided, and frames encoded with
>>                 modes outside of the subset MUST NOT be sent in any RTP
>>                 payload or used in codec mode requests.  If not present,
>>                 all codec modes are allowed for the payload type.
>>
>>
>> Corrected Text
>> --------------
>>        mode-set: Restricts the active codec mode set to a subset of all
>>                 modes, for example, to be able to support transport
>>                 channels such as GSM networks in gateway use cases.
>>                 Possible values are a comma separated list of modes from
>>                 the set: 0,...,7 (see Table 1a [2]).  The SID frame type
>>                 8 and NO_DATA (frame type 15) are never included in the
>>                 mode set, but can always be used.  If mode-set is
>>                 specified, it MUST be abided, i.e. frames encoded with
>>                 modes outside of the subset MUST NOT be sent in any RTP
>>                 payload and codec mode requests MUST only use modes
>>                 within the mode-set or CMR=15. If the mode-set parameter
>>                 is not present, then all codec modes are allowed for the
>>                 payload type.
>>
>>
>> Notes
>> -----
>> The existing text rules out that CMR=15 is used when a mode-set has
> been negotiated. However, this contradicts a statement in .clause 4.3.1
> that if a terminal has no preference in which mode to receive, it SHOULD
> set CMR=15 in all its outbound payloads.
>>
>> This erratum has been discussed and endorsed by the 3GPP SA4 group
> before submission to IETF.
>
>> 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.
>>
>> --------------------------------------
>> RFC4867 (draft-ietf-avt-rtp-amr-bis-06)
>> --------------------------------------
>> Title               : RTP Payload Format and File Storage Format for
>> the Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband
>> (AMR-WB) Audio Codecs
>> Publication Date    : April 2007
>> Author(s)           : J. Sjoberg, M. Westerlund, A. Lakaniemi, Q. Xie
>> Category            : PROPOSED STANDARD
>> Source              : Audio/Video Transport
>> Area                : Real-time Applications and Infrastructure
>> Stream              : IETF
>> Verifying Party     : IESG
>>
>>
>
>


-- 

Magnus Westerlund

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