Re: [xrblock] [Gen-art] Review: draft-ietf-xrblock-rtcp-xr-qoe-12

"Joel M. Halpern" <jmh@joelhalpern.com> Tue, 12 November 2013 19:20 UTC

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Date: Tue, 12 Nov 2013 14:20:23 -0500
From: "Joel M. Halpern" <jmh@joelhalpern.com>
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To: Alan Clark <alan.d.clark@telchemy.com>, gen-art@ietf.org, draft-ietf-xrblock-rtcp-xr-qoe.all@tools.ietf.org, xrblock@ietf.org
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Subject: Re: [xrblock] [Gen-art] Review: draft-ietf-xrblock-rtcp-xr-qoe-12
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Thank you for your very fast and effective response Alan.  Those work 
for me.
Yours,
Joel

On 11/12/13 12:05 PM, Alan Clark wrote:
> Hi Joel
>
> Thanks for your comments.
>
> (i) Section 1.4
>
> Proposed change
>
>     The MOS Metrics Report Block can be used in any application of RTP
>     for which QoE measurement algorithms are defined.
>
> to
>
>     The MOS Metrics Report Block can be used in any application of RTP
>     for which QoE (Quality of Experience) measurement algorithms are defined.
>
> (ii) Section 3.2.2
>
> Proposed change
> "The 8-bit ID is the local identifier of this segment in the range 1-255
> inclusive"
> to
> "The 8-bit CAID is the session specific reference to the calculation
> algorithm and associated qualifiers indicated in SDP (see Section 4.1)
> and used to compute QoE scores for this segment"
>
> (iii) Section 3.2.1
>
> Proposed change
> "The 8-bit CAID is the local identifier of calculation algorithm
> associated with this segment in the range 1-255 inclusive. "
> to
> "The 8-bit CAID is the session specific reference to the calculation
> algorithm and associated qualifiers indicated in SDP (see Section 4.1)
> and used to compute QoE scores for this segment"
>
> (iv) Section 4.1
>
> Proposed change
>
>     mapentry =  "calg:" 1*5 DIGIT ["/" direction]
>                            ;Values other than 4095~4351 are valid
> to
>    mapentry =  "calg:" 1*3 DIGIT ["/" direction]
>                            ;Values other than 1..255 are valid
>
> and remove
>
>   mostype = "mostype=" ("e"; Estimated MOS [P.800.1]
>                             /"s";subjective MOS [P.800.1]
>                             /"o";objective MOS [P.800.1]
>                             /non-ws-string)
>
> We will see if there are additional comments and then update the draft
>
> Regards
>
> Alan Clark
>
>
> On 11/12/13, 7:12 AM, Joel Halpern wrote:
>> I am the assigned Gen-ART reviewer for this draft. For background on
>> Gen-ART, please see the FAQ at
>>
>> <http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>.
>>
>> Please resolve these comments along with any other Last Call comments
>> you may receive.
>>
>> Document: draft-ietf-xrblock-rtcp-xr-qoe-12
>>     RTP Control Protocol (RTCP) Extended Report (XR) Blocks for
>>                        MOS Metric Reporting
>> Reviewer: Joel M. Halpern
>> Review Date: 12-November-2013
>> IETF LC End Date: 27-November-2013
>> IESG Telechat date: N/A
>>
>> Summary: This document is nearly ready for publication as a Proposed
>> Standard RFC
>>
>> Major issues:
>>
>> Moderate issues:
>>     In section 3.2.2 on Multi-Channel audio per SSRC Segment, the
>> format description for the Calculation Algorithm ID (CAID) reads:
>> "The 8-bit ID is the local identifier of this segment in the range
>> 1-255 inclusive."  I am pretty sure this is supposed to be an
>> algorithm ID, not a segment index?
>>
>>     The text in section 4.1 indicates that the number after "calg:" in
>> the mapentry of the calgextmap is used as the ID in the CAID of the
>> xrblock.  The packet format only allows 8 bits of value.  So why does
>> the SDP format allow up to 5 digits?  Also, is there some reason that
>> the special values 4095-4351 (in section 4.1) or 4096-4351 (in section
>> 4.2) are used rather than say equally invalid 512 through some
>> appropriate upper bound still in 3 digits?
>>
>> Minor issues:
>>     Please ensure that all acronyms are expanded on first use. For
>> example, QoE is not expanded.
>>
>>     The notes in B.3 indicate that mostype was to be removed from the
>> SDP grammar.  But it is still defined.  And section 4.2 still mentions
>> it, even though it does not get referenced by the message format.
>> Please finish removing it.  (also "most type")
>>
>> Nits/editorial comments:
>> _______________________________________________
>> xrblock mailing list
>> xrblock@ietf.org
>> https://www.ietf.org/mailman/listinfo/xrblock
>>
>