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The second meeting of ITU-T Study Group 12 (Performance, QoS and QoE) in the 2009-2012 study period,
convened by TSB Collective letter 2/12 of 6 July 2009, took place in Geneva, from 3 to 12 November 2009.
111 delegates attended this meeting from 31 countries. The meeting run paperless as announced in the
above mentioned Collective letter.
Results of the meeting of Working Party 1/12
The foreseen evolution of activities is to consider bandwidth extension and binaural perception.
Results related to Recommendations
Consent was reached on two revised and one new Recommendations:
- P.581 "Use of head and torso simulator (HATS) for hands-free and handset terminal testing"
- P.501 "Test signals for use in telephonometry"
- P.1110 “"Wideband hands free communication in motor vehicles"
A corrigendum was approved to correct the Bibliography of P.310:
Other results
The Focus Group “From/In/To Cars Communication II (FG CarCom)” concluded its work and produced an
input for a new ITU-T Recommendation on "Wideband hands free communication in motor vehicles"
(which was consented as P.1110). SG 12 also approved a new focus group (FG CarCOM) in the same
car communication domain with a new Charter. The first meeting of this focus group will take place
in 28-29 January 2010 in Vancouver, Canada.
Results of the meeting of Working Party 2/12
Results related to Recommendations
- New Appendix III of Rec. G.114, “Delay variation on unshared access lines” was approved by the Study Group.
Other results
- The P.NAMS Terms of Reference (ToR) was approved by Q.14/12, and is attached to the report for WP2/12, in
order to serve as basis for the further model development. A qualification test plan for P.NAMS is available
in a first draft, and a number of important test plan decisions were taken during this meeting.
- The Terms of Reference for P.NBAMS, which will result in a bitstream model
(using also the payload in addition to the input to P.NAMS) are available in a draft
state, and the intention is to reuse as much as possible from the P.NAMS’s ToR. An
informal call for participation is issued to have organizations indicate their participation
in the P.NBAMS development.
- The correct in time submission of the P.OLQA candidates to ITU-T TSB by 27th of July,
2009 was reported. Further, the TSB confirmed the reception of the models and checked briefly
their technical function by using provided test vectors.
- The next phase of P.OLQA is the design and conduction of a set of new data bases for the so-called test phase.
The finalization of the test plans was one of the main tasks for this SG12 meeting.
- The P.OLQA activities will deliver the following solutions and Recommendations:
- P.OLQA main branch predicting overall MOS will be given in May,
2010 for decision to SG12. The selected model(s) will form the main
body of a P.OLQA Recommendation and will be described in detail or
example source code is given.
- P.OLQA multidimensional/degradation decomposition approaches
(noisiness, discontinuity, spectral coloration, loudness) will be
evaluated later. These models are optional for the candidates.
Detailed described models for the individual dimensions could form Annexes of P.OLQA later.
- The technical degradation decomposition to be used for diagnostics and cause analysis
is under discussion and will be used as the underlying technical analysis.
A potential link to the P.OLQA multidimensional perceptual scaling will be studied.
This technical degradation decomposition may result in a separate Recommendation.
Related activities
The JRG-MMQA meeting met coincidently with the VQEG’s Multimedia and Hybrid Ad Hoc Groups at the VQEG
meeting in Berlin, Germany, June 22 – 26, 2009.
This meeting was focussed on the completed RRNR-TV project and the several ongoing projects
('HDTV' 'Hybrid/Bitstream', and ‘Multimedia Phase 2’).
Results of the meeting of Working Party 3/12
Results related to Recommendations
Consent was reached on a new Annex:
- Annex B/Y.1563 “Terminology for Consecutive Severely Errored Seconds in Ethernet Services”.
The following documents were approved by the Study Group:
- Revised Appendix I/G.1070 “Coefficients in video quality estimation function with respect to coding and packet-loss degradations”.
- New Supplement to the E-800 series Recommendations: E.800SerSup8 “Guidelines for Inter-Provider Quality of Service”.
Other results:
- Stable text is available for new draft Recommendation G.RQAM
“Reference guide for QoE assessment methodologies”, with consent expected in May 2010.
- Work progressed on a suite of new draft Recommendations related to IPTV
performance measuring and monitoring; G.IPTV_PMPD “IPTV performance monitoring
parameter definitions; G.IPTV_PMMM “IPTV performance monitoring – measurement
methods”; G.IPTV_PMR “IPTV performance measuring and reporting”.
- As part of the planned revision of Rec. Y.1540, the current Appendix VII/Y.1540 stream
repair parameter definitions will be modified to include both time-based and packet-based
parameters when made normative.
- A new work item was opened to develop a new Recommendation on Ethernet Service Activation Methodology, Y.156sam.
- The first draft of new Recommendation Y.154HN on Performance Parameters for Home Networking was agreed.
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