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ITU-T Study Group 12 (Study Period 2005 – 2008) |
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Executive Summary of Last Meeting |
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Meeting Executive Summary
Geneva, 22-30 May 2008
Study Group 12 has defined the future work programme, which will be more focused on multimedia quality and extended audio bandwidth (wideband, superwideband and fullband). A new question related to diagnosis has been agreed.
In order to fill the standardization gap, Study Group 12 has created a "SG12 Regional Group for Africa", chaired by Mr. Daniel Waturu (Kenya). The Vice Chair is Mr. Abdel-Nasser Mama Touré (Benin).
The attendance was increased to one hundred at this meeting.
Executive Summary of WP1/12 meeting
The foreseen evolution of activities is to consider bandwidth extension and binaural perception. A workshop to collect contributions will be held in Lannion France 10-12 September 2008.
The focus group FITCAR continued since January 2008 under a second focus group CarCom with the main goal of extending the standard to wideband transmission of car hands-free systems.
Recommendations
Consent was reached on one new Recommendation and an Implementer Guide:
New Recommendation P.1100 " Narrowband Hands Free Communication in Motor Vehicles " –
Implementer's guide of Recommendation P.340
Other results
- The Round Robin test has given very good technical results available in the final report and the revision of Recommendation P.57 is foreseen for the next SG12 meeting in March 2009.
- The general revision of Recommendation P.79 is a priority for the next study period, in order to reconsider, in the light of new contributions, the calculation of Loudness Ratings for devices supporting narrowband, wideband and super wideband transmission
- a consequence of the demand on work with wider bandwidths than wideband, open issues such as test methodology, calibration have to be solved. The way forward is to provisionally use specifications or recommendations from other standard bodies until SG12 develops and approves its own recommendations.
Executive Summary of WP2/12 meeting
JRG on Multimedia Quality Assessment
It was reported from the VQEG meeting held in Kyoto, Japan, 3-7 March 2008, that the Multimedia Phase I test has just been completed after over 3 years in progress. Based on these VQEG results, Study Group 9 was able to form Recommendations. There will be upcoming Recommendations J.246 for reduced-reference models and J.247 for full-reference models.
Recommendations
Consent was reached on one new Recommendation and one revised Recommendation:
- New Recommendation P.833.1 “Methodology for the derivation of equipment impairment factors from subjective listening-only tests for wideband speech codecs”,
- Revised Recommendation G.107 “The E-model, a computational model for use in transmission planning”.
Other results
- On the ITU-T Study Group 12 website, the E-model is now available online in its current version (03/2005). As a result, Recommendation G.107 was revised by replacing the
gbasic code (Annex C) by a php4 script.
- Call for participation to the development of a non-intrusive parametric model for the assessment of performance of multimedia streaming (P.NAMS) will be sent out by Collective Letter.
Executive Summary of WP3/12 meeting
Progress on IP-related QoS and resource management
Good progress was made in the area of NGN multimedia QoS/QoE and resource management, with several new Recommendations consented, including two based on output documents passed to SG12 from FG IPTV:
Recommendation G.1080 (formerly G.IPTV-QoE) “Quality of experience requirements for IPTV services” defines user requirements for Quality of Experience for IPTV services. The QoE requirements are defined from an end user perspective and are agnostic to network deployment architectures and transport protocols.
Recommendation G.1081 (formerly G.IPTV-PMP) “Performance monitoring points for IPTV” defines performance monitoring points for IPTV which will allow the service provider/network operator to monitor the performance of the complete IPTV service delivery to the end user.
Recommendation Y.1223 (formerly Y.IPFlowInt) “Interworking guidelines for transporting assured IP flows” defines a set of IP flow specifications that provide a basis for coordinated decisions that must be made regarding the admission, policing, and assignment of resources to particular offered flows in order to transport IP flows with assured end-to-end quality and reliability in a multi-provider environment.
Recommendation Y.1544 (formerly Y.IPMulti) “Multicast IP performance parameters” extends the framework of Recommendation Y.1540 to the point-to-multipoint, or multicast case. It also expands the key Y.1540 concepts with details needed to define parameters for the point-to-multipoint configuration.
Recommendation Y.1563 (formerly Y.ETHperf) “Ethernet frame transfer and availability performance” defines parameters that may be used in specifying and assessing the performance of speed, accuracy, dependability, and availability of Ethernet frame transfer of international Ethernet communication service.
Approval was given for Revised Appendix VIII to Recommendation Y.1541 (2006) “Effects of IP network performance on digital television transmission QoS”. This appendix details a part of the analysis behind the specification of Provisional Network QoS classes 6 and 7 in Table 3. The objective values were selected in order to support digital television transmission.
In addition, initial Terms of Reference were developed for new draft Rec. G.OMVAS “Opinion Model for Video and Audio Streaming applications”, and updates were agreed for the draft texts of draft Rec. G.IPTV-QMA “Quality Management and Assurance for IPTV“ and draft Rec. G.FQT “Framework for multimedia QoE testing”.
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