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ITU-T Study Group 16 (Study Period 2005-2008)
Executive Summary of the Meeting
Results from previous meetings: 2009-01 | 2008-04 | 2007-06 | 2006-11 | 2006-04 | 2005-07
Meeting Results
Geneva, 14 - 24 November 2006

Executive Summary of the meeting

Major Plenary accomplishments:
  • Consented Recommendations: 33 at this meeting.
  • NOTE: As decided in the closing SG 16 Plenary, G.729.1 Amd.1 was split in two amendments, whereby the new Annex B (floating point spec) is moved into Amd.2 and Amd.1 contains the balance of text initially submitted for Consent by WP3/16. Further, it was agreed that the Last Call for G.729.1 Amendment 2 will be delayed to mid-January in order to allow extended review of accompanying floating point C code by the SG 16 experts.
  • Recommendations Decided/Determined/Approved: none at this meeting
  • Recommendations deleted or proposed for deletion: none
  • Other texts approved: errata (0), appendices (2), supplements (2), technical papers (3), and implementors’ guides (4)
  • Changes in SG 16 Question set:
    • New Q8/16 on generic sound activity detection – Pending final approval at the next SG 16 meeting after endorsement by TSAG, SG 16 will start immediately working in this field under the leadership of Mr Paul Coverdale (Canada) – see text
    • Revised Q6/16 on visual coding – In addition to the video coding studies, Q6/16 now is also responsible for still-image coding activities – see text
  • For updates to the SG 16 management team, see below
  • List of interim meetings pre-approved: see related link
  • Final text of outgoing Liaison Statements: see related link (TIES account needed)
The meeting had 132 attendees during the meeting period (compared to 145 at the last meeting). The final list of participants is available in TD 357 (P)

Map of meeting reports & Liaison Statements (as seen by the SG 16 Plenary)

  Plen WP1 WP2 WP3
Meeting Report TD 330 (P)
Q20: TD 331R2 (P)
Q26: TD 332R1 (P)
TD 333R1 (P) TD 334R1 (P) TD 335R1 (P)
Liaison Statements Q20: TD 362 (P)
Q26: TD 359 (P)
TD 336 (P) TD 337R1 (P) TD 338R1 (P)
Work programme Q26: TD 332R1 (P) TD 339 (P) TD 340R1 (P) TD 341R1 (P)

Summary of Questions’ Results

Question 1/16 Summary 
Question 1 reviewed several matters in relation with H.324/M, in particular, contributions proposing corrections and clarifications to the call setup acceleration techniques from Annex K/H.324. Along other enhancements, a new Recommendation H.272, defining procedures and values for video gamma compensation in multimedia systems, such as videoconferencing and video telephony, was created, and several Recommendations of the T.120-series were revised. Question 1 proposed four Recommendations, one Amendment and one Corrigendum for Consent (H.272, H.222.0 Amd.1, H.324 Cor.2, T.120, T.123, and T.124) and one Implementors’ Guide for Approval (T.120 Sub-series).

Question 2/16 Summary 
Question 2 successfully completed work on revised Recommendation H.460.4 and new Amendments to H.246 and H.225.0.  The experts also completed work on a revised H.323 System Implementors’ Guide that documented editorial errors found in H.245 and H.460.18.

Question 3/16 Summary  
Q3/16 met for 12 quarters to review some 90 documents. Q3/16 continued work on a number of existing work items which has resulted in 8 Recommendations for Consent: H.248.2 Amendment 1, Revised H.248.25, Revised H.248.28, Revised H.248.30, H.248.40, H.248.44, H.248.46 and H.248.47. In addition to these Recommendations Q3 prepared 4 documents for Approval: Release 9 of the H-Series Supplement 2 “Packages Guide”, new H-Series Supplement 5 “Guidelines for Resource Management of Resources for H.248 RTP Terminations”, the revised H.248 Sub-Series Implementors’ Guide, and the H.248.1 Version 2 Implementors’ Guide. Q3 prepared seven liaison statements.
The Rapporteur would like to thank the contributors to the Q3 work and especially the editors for their work in preparing Recommendations.

Question 4/16 Summary  
Question 4/16 completed draft H.350.7 "Directory Services Architecture for XMPP" for Consent that allows an organization to directory-enable and manage XMPP (Extensible Messaging and Presence Protocol) resources in the same way that other multimedia protocols (e.g. H.320, H.323, SIP) are managed in H.350. We also started a new work on H.350.8 "Resource Registry" to represent not only people but also resources such as conference rooms, classrooms, medical facilities and virtual organizations in a directory. H.350 Use Guide was considered for ITU-T publication but its implementation is yet to be materialized.

Question 5/16 Summary  
Question 5 made progress on the development of Recommendation H.proxy during this meeting.  A number of contributions on the subject are expected for the next Rapporteur’s meeting, with an objective of consenting the text at the next SG16 meeting.  The experts completed work on the revised Technical Paper “Firewall and NAT Traversal Problems in H.323 Systems”, progressed work on Technical Paper “Harmonization of multiple mechanisms for H.323 NAT/FW traversal”, and agreed on editorial corrections for H.460.18 (incorporated in the H.323 System Implementors’ Guide).

Question 6/16 Summary  
Q6/16 is also sometimes referred to as "VCEG" (Video Coding Experts Group).  A substantial portion of the work of Q6/16 is also conducted jointly with ISO/IEC JTC 1/SC 29/WG 11 (MPEG) in an organization known as "the JVT" (Joint Video Team). The ongoing JVT work is currently concentrated on the maintenance and development of extensions for Rec. H.264 (a Twin Text Recommendation with ISO/IEC 14496-10) including enhanced support for professional applications, scalable video coding (SVC), multi-view video coding (MVC) and supplemental enhancement information (SEI).
The primary goals for Q6/16 at this meeting of SG 16 were to review the progress of Q6 and JVT work, to reach AAP Consent on those work items that have reached sufficient maturity, and to plan future work.  Additionally, it was agreed to task Q6/16 with handling still image coding issues, previously in Q23/16, and for such a revised text of Q6/16 was prepared. At this meeting, Q6/16 already handled the majority of the still-image coding work. The goals of the meeting were achieved to the satisfaction of Q6/16.
Q6/16 produced four items for AAP Consent: 1) a draft new Amendment to Rec. H.262 (Common Text with ISO/IEC 13818-2) to enhance colour space support, 2) a draft new Amendment to Rec. H.264 (Twin Text with ISO/IEC 14496-10) to define all-Intra and 4:4:4 profiles primarily intended for professional video applications, 3) a draft new Corrigendum to Rec. T.800 (Common Text with ISO/IEC 15444-1), and 4) a draft new Corrigendum to Rec. T.808 (ISO/IEC 15444-9).  The first two of these items were video coding topics conducted with a close relationship to ISO/IEC JTC 1/SC 29/WG 11 (MPEG) and the latter two of these items were JPEG 2000 image coding conducted with a close relationship to ISO/IEC JTC 1/SC 29/WG 1 (JPEG/JBIG).

Question 9/16 Summary  
The Test Plan for the Baseline Selection Testing was reviewed and modified with the consent of the Q7/12 Rapporteur. The Processing Test Plan for the Baseline Selection Testing was reviewed and approved.
The Terms of Reference for the Super-Wideband and Stereo modes of the EV-VBR Codec were updated and approved.
A draft mandate, proposed by the Rapporteur, for the planned Focus Group was discussed and edited. The timescales for the remainder of the Q9/16 work was proposed by the Rapporteur and approved by the closing Work Party Plenary
Q9/16 drafted a detailed response to the most recent liaison statement from Q7/12 SQEG addressing all of their concerns and open questions. A copy of the revised Test Plan, Processing Plan and Super-Wideband Stereo Terms of Reference were attached to this liaison reply.

Question 10/16 Summary  
The group approved submission for Consent under AAP: Revised Rec. G.729 (main body, Annexes A, B, C, C+, D, E, F, G, H, I and J including C-source Codes and test vectors) as G.729 Release 2, new Amendment 1 to G.729.1 (“New Annex A on G.729.1 usage in H.245, plus corrections to the main body and updated test vectors”), new Amendment 2 to G.729.1 (“New Annex B on a reference floating-point implementation for G.729.1”), new Corrigendum to G.722.2 (corrections of G.722.2 Annex C defects). Two new Appendices to G.722 that propose PLC algorithms for applications prone to packet losses have been submitted for Approval at this meeting.
G.729.1 Characterization phase step 2 has been completed. The group agreed to launch the standardisation of low complexity full band extension to G.722.1 for wireline conversational applications, DTX/CNG scheme for G.729.1. For these work items, Terms of Reference and time schedule have been drafted. No consensus was reached to move for Consent under AAP the proposed G.729.1 Amendment and/or Annex to extend the low delay mode operation up to 14 kbit/s.
Question 10/16 produced outgoing Liaison Statements to SG 12 (on speech and audio coding matters), to ETSI TC DECT (on G.722 PLC), to SG11 (on Q.3401), to ISO/IEC MPEG (on G.722.1 full band extension and on G.729.1 super-wideband extension).
The work will progress by correspondence and will be reviewed at the two next Q10/16 meetings, planned in January and March 2007 as interim meetings.

Question 11/16 Summary 
The goal for Q11/16 was to consider contributions on the work items of V.150.1, V.151 and V.152. With respect to V.151 text for a new Annex was considered and progressed. The group agreed to define two new Annexes for V.152 addressing a new Data Signal Detector and silence suppression scheme and a mechanism to allow the re-enabling of echo cancellers on detecting V.21 HDLC Flags. The group agreed to start a new work on a Recommendation for defining inter-working functions between Relay and VBD. The initial work will be a study on the subject matter with priority to a V.152 to T.38 inter-working function.  The group has no documents for Approval or Consent at this meeting. The group is requesting a single interim Rapporteur’s meeting for February/March 2007 timeframe.

Question 14/16 Summary 
Proposed extension of silence period in T.30 in case of fallback from V.34 fax to normal fax was agreed to re-enable echo cancellers. New Amendment 1 to T.30 was agreed to be put forward for Consent at this meeting. It was agreed to put forward for Consent a revised version of T.38, which contains clarification of all call establishments, improvement of the compatibility between T.38 gateway and Group 3 facsimile and some other minor corrections. The Question plans no interim meetings before June 2007

Question 15/16 Summary 
At this meeting, Question 15/16 advanced the work on drafting new Recommendation I.733 expecting to be put forward for Consent at July 2007 SG 16 meeting. Contribution proposing the additional text for I.733 was agreed to be included with a minor modification. One joint session with Q16, Q17, Q18 of WP1 and Q23 of WP3 was organized to identify the requirements for proposed new work on developing Generic Sound Activity Detector (GSAD) in WP3. The necessity of developing different types of GSAD was recognized, and it was basically agreed to advance the work in WP3. The Question plans to hold one interim meeting.

Question 16/16 Summary 
Further progress was made on drafting text for revised ITU-T Rec. G.168 “Echo Cancellers” and new ITU-T Rec. G.160 “Voice Enhancement Devices”. G.168 was put forward for Consent at this meeting. G.160 is planned for Consent in 2008. A joint meeting with Questions 11, 14 and 18 was held to discuss V.34 fax operation with echo cancellers. Another joint meeting with Questions 15, 17, 18 and 23 was held to discuss the requirements of a Generic Sound Activity Detector (GSAD). One liaison regarding proposed changes to ITU-T Rec. G.108.2 “Transmission planning aspects of echo cancellers” was sent to SG12. One interim meeting is proposed.

Question 17/16 Summary 
At this meeting, Question 17/16 advanced the work on drafting new Recommendation G.IP2IP expecting to be put forward for Consent in 2008. Contributions proposing the addition and the modifications to draft G.IP2IP were discussed, and all the agreements were reflected in new draft text (V.1.6). One joint session with Q15, Q16, Q18 of WP1 and Q23 of WP3 was organized to identify the requirements for proposed new work on developing Generic Sound Activity Detector (GSAD) in WP3. The necessity of developing different types of GSAD was recognized, and it was basically agreed to advance the work in WP3. The Question plans to hold one interim meeting.

Question 18/16 Summary 
It was decided to propose draft new Recommendation Q.115.2 “Logic for the control of Voice Enhancement Devices/Functions” and draft new Corrigendum 1 to Recommendation G.766.1 “Managed objects for signal processing network elements” for Consent at the closing SG16 Plenary. Further progress was made on drafting text for revised Recommendation G.161 “Interaction aspects of signal processing network equipment”, draft new Recommendation G.mdcspne “Mechanism for dynamic coordination of SPNE” and draft new Recommendation G.UCPSPNE about “SPNE mechanisms/auxiliary functions”. Discussions were held together with Q11, Q14 and Q16 about the interoperability of V.34fax operation with echo cancellers, and with Q15, Q16, Q17 and Q23 to discuss the development of a Generic Sound Activity Detector (GSAD). It was agreed to develop a new Recommendation on Signal Processing Network Equipment (G.SPNE). The Question is planning one interim meeting, and prepared one LS to SG 11 requesting to change a property ID in ITU-T Rec. Q.115.0. One interim meeting is proposed.

Question 20/16 Summary 
Q20/16 reviewed the results of the ongoing activities on NGN, IPTV, NID, TDR/EW and GRID. As background information, two tutorials on IPTV and GRID have been organised. The need for specific actions for coordination and harmonization of the work performed on these topics has been discussed under the relevant SG 16 Questions.
In addition SG 16 initiated the organization of a workshop on “Multimedia in NGN”. A first draft of the objectives with a proposal for the different sessions has been developed (see TD314/Plen). The Mediacom webpage has been updated and the latest development on TDR/EW included in a liaison statement to TSAG, ITU-T SG2 and PCP-TDR (TD362/Plen).

Question 21/16 Summary 
Question 21/16 has progressed the work on “Multimedia over NGN” by giving some guidelines to the “H.325” project, but it's still not enough clear. The role of “H.325” within an NGN-IMS based network must particularly be clarified, as well as the gaps of the SIP protocol, if there are some. It was decided to keep the H.saarch draft as a starting point to further define a network-agnostic multimedia architecture (particularly dealing with A/V services). It is expected that the requirements described there will be useful to define a relevant NGN framework, jointly with SG13. It was proposed to define also an IPTV Recommendation project (e.g. H.612) and to work on the topic with the FG IPTV. A first version of this document should be written for the next Q21 meeting, starting from work items identified for Q21 by the FG IPTV, and including contributions from CATR on the subject. Finally, it was also decided to work on home networking issues within the H.saarch and H.612 contexts. A new subject H.GHNA was initiated to progress a generic home networking architecture with cooperation with SG15, HGI Forum, etc.

Question 22/16 Summary  
Q22 met for five sessions and two of these sessions were held jointly with Q21. LS from JCA-NID, TSB and FG IPTV were reviewed and necessary responses were made. We had effective discussions covering networked ID, IPTV, videotelephony and visual surveillance. As for the networked ID area, it was decided to develop a set of Recommendations according to a roadmap with the first Recommendations expected in July 2007. Videotelephony discussions produced a brief ad hoc group report to be used to guide further contributions. Q22 would like to thank all those who have actively participated in the Q22 meeting and look forward to their support at subsequent meetings.

Question 23/16 Summary 
Q23 agreed to create a new SG16 Question to address the standardization of a generic sound activity detector (G.SAD). In coordination with Q6/16, two corrigenda to the T.800 series (JPEG-2000) were submitted for approval under AAP as common text with ISO. Q23 reviewed progress of the multimedia convergence codec, and agreed to concentrate on defining the high level application areas before continuing to develop detailed terms of reference (ToR). The meeting updated the media coding database based on input from MPEG, 3GPP2 and 3GPP. Finally, Q23 agreed to postpone the approval of T.55 (Unicode) as a stand-alone ITU-T Recommendation, pending a decision from ISO/IEC regarding whether Unicode can be maintained as ITU‑T | ISO/IEC common text.

Question 24/16 Summary 
Question 24 discussed the contents of draft new Recommendations H.361 Annexes A, B, and C, and it was agreed to submit the presented documents as contributions for the next Rapporteur meeting after reflecting the comments received at the meeting. In addition, Question 24 discussed possible new work items on end-to-end QoS in multimedia systems, e.g., media codec negotiation for minimizing the number of transcodings and codec bit rates control based on QoS feedback.

Question 25/16 Summary 
Q25 finalized and proposes for Consent by the SG16 meeting new draft Recommendation H.460.22 “Negotiation of Security Protocols to Protect H.225.0 Call Signalling Message”.

Question 26/16 Summary 
Q26/16 completed its work on the Accessibility Guidelines (now Recommendation F.790) and the Telecommunications Accessibility Checklist. These documents were approved. We reviewed the outputs of SG 13 on NGN and FG IPTV for their accessibility aspects and sent liaisons to those groups. Liaisons were sent to several other groups updating them on our work. We welcomed the creation of Question 20/1 in ITU-D on accessibility and agreed to collaborate where possible. We also welcomed the creation of an accessibility flyer by the TSB.

Question 28/16 Summary 
Q28/16 presented the activities carried out since last SG16 meeting. The first version of a roadmap about standardization on e-health was submitted for approval as an ITU-T SG 16 Technical Paper. This roadmap will be publicized and distributed among different SGs. It was reported also that very little work has been carried out under the E-health Standardisation Coordination Group (eHSCG) and the Healthcare Technology Task Force (HTTF), mainly oriented to coordination among SDOs and promotional activities. As no volunteers appeared, it was decided to stop working on a new Recommendation about “Framework for e-health applications in emergency situations”.

Question 29/16 Summary 
In the context of NGN-GSI, Q29/16 has continued its cooperation with Question Q6/13 as well as Questions Q2 and Q5/19 on mobility-related issues for NGN. This cooperation supports Q29/16 to progress its work on the technical paper TP.MMSM (Service Mobility for new Multimedia Service Architecture). A new draft 0.7 of the technical paper was presented. For consolidation of the content, the definitions of “vertical” and “horizontal” have to be adapted to the definitions, given by Q.1706. Due to lack of contributions the “Presence” work item was cancelled.

Recommendations Consented by SG 16 on the closing Plenary 
Description  Documents* AAP /LC**
ITU-T Rec. F.790 (ex V.guidelines) "Telecommunications accessibility guidelines for older persons and persons with disabilities" (New) TD 355(P) 50
ITU-T Rec. G.168 "Digital Network Echo Cancellers" (Rev.) TD 323(P) 50
ITU-T Rec. G.722.2 Corrigendum 2 "Corrections to C source code in Annex C" (New) TD 361(P) 50
ITU-T Rec. G.729 "Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linear-prediction (CS-ACELP)" (Rev.) TD 305(P) 50
ITU-T Rec. G.729.1 Amendment 1 "New Annex A on G.729.1 usage in H.245, plus corrections to the main body and updated test vectors" (New) – See note TD 360(P) minus Annex B 50
ITU-T Rec. G.729.1 Amendment 2 "New Annex B on a reference floating-point implementation for G.729.1" (New) – See note Only Annex B in TD 360(P) 51
ITU-T Rec. G.776.1 Corrigendum 1 "Managed objects for signal processing network elements" (New) TD 328(P) 50
ITU-T Rec. H.222.0 | ISO/IEC 13818-1 Amendment 1 "Transport of MPEG-4 streaming text and MPEG-4 lossless audio over MPEG-2 systems" (New) TD 308(P) 50
ITU-T Rec. H.225.0 Amendment 1 "Updating Connected Party Information after Third Party Pause and Re-Routing & Clarification to Echo Control Procedures" (New) TD 315(P) 50
ITU-T Rec. H.246 Amendment 1 "Mapping of user priority level and country/international network of call origination between H.225 and ISUP" (New) TD 329(P) 50
ITU-T Rec. H.248.2 Amendment 1 "Discriminated call type enhancement" (New) TD 319R1(P) 50
ITU-T Rec. H.248.25 "Basic CAS packages" (Rev.) TD 352(P) 50
ITU-T Rec. H.248.28 " International CAS packages" (Rev.) TD 353(P) 50
ITU-T Rec. H.248.30 "RTCP extended performance metrics packages" (Rev.) TD 354(P) 50
ITU-T Rec. H.248.40 "Application Data Inactivity Detection Package" (New) TD 312(P) 50
ITU-T Rec. H.248.44 (ex H.248.MLPP) "Multi-level precedence and pre-emption package" (New) TD 326(P) 50
ITU-T Rec. H.248.46 "Connection Capability Control Package" (New) TD 320(P) 50
ITU-T Rec. H.248.47 "Statistic Conditional Reporting Package" (New) TD 321(P) 50
ITU-T Rec. H.262 | ISO/IEC 13818-2 (2000 edition) Amendment 2 "Video: Support for colour spaces" (New) TD 348(P) 50
ITU-T Rec. H.264 Amendment 2 "All-Intra and High 4:4:4 Predictive profiles" (New) TD 349(P) 50
ITU-T Rec. H.272 (ex H.Gamma) "Procedures and values for video gamma compensation in multimedia systems" (New) TD 346R1(P) 50
ITU-T Rec. H.324 Corrigendum 2 "Terminal for low bit-rate multimedia communication: Corrections to Annex K" (New) TD 325(P) 50
ITU-T Rec. H.350.7 "Directory Services Architecture for XMPP" (New) TD 327(P) 50
ITU-T Rec. H.460.4 "Call priority designation and country/international network of call origination identification for H.323 priority calls" (Rev.) TD 317(P) 50
ITU-T Rec. H.460.22 (ex H.460.spn) "Negotiation of Security Protocols to Protect H.225.0 Call Signalling Message" (New) TD 342R2(P) 50
ITU-T Rec. Q.115.2 "Logic for the control of Voice Enhancement Devices/Functions" (New) TD 303R1(P) 50
ITU-T Rec. T.30 Amendment 1 "Extension of silence period during fallback from V.34" (New) TD 301(P) 50
ITU-T Rec. T.38 "Procedures for real-time Group 3 facsimile communication over IP networks" (Rev.) TD 302(P) 50
ITU-T Rec. T.120 "Data protocols for multimedia conferencing" (Rev.) TD 298(P) 50
ITU-T Rec. T.123 "Network-specific data protocol stacks for multimedia conferencing" (Rev.) TD 299(P) 50
ITU-T Rec. T.124 "Generic Conference Control" (Rev.) TD 300R1(P) 50
ITU-T Rec. T.800 | ISO/IEC 15444-1 Corrigendum 1 "Information technology - JPEG 2000 image coding system: Core coding system" (New) TD 343(P) 50
ITU-T Rec. T.808 | ISO/IEC 15444-9 Corrigendum 1 "Information technology - JPEG 2000 image coding system: Interactivity tools, APIs and protocols" (New) TD 347(P) 50
*: some texts are subject to editorial cleanup before posting. Hence, the version posted may differ slightly from the TD indicated.
**: expected AAP Announcement for Last Call

Recommendations Approved by SG 16 on the closing Plenary
None at this meeting.

Recommendations Decided by SG 16 on the closing Plenary
None at this meeting.

Other texts approved by SG 16 
Implementors’ Guides Document
ITU-T Rec. H.248 Sub-series Implementors' Guide (Rev.) TD 344(P)
ITU-T Rec. H.248.1 Version 2 Implementors' Guide (Rev.) TD 345(P)
ITU-T H.323 System Implementors' Guide (Rev.) TD 358(P)
ITU-T Rec. T.120 Series Implementors' Guide (Rev.) TD 297(P)

Supplements Document
ITU-T H-Series Sup.2 “H.248 sub-series packages guide – Release 9” (Rev.) TD 316(P)
ITU-T H-Series Sup.5 (ex RTPXtalk) “Gateway Control Protocol: Guidelines for Resource Management of Resources for H.248 RTP Terminations” (New) TD 322(P)

Appendices Document
ITU-T Rec. G.722 Appendices III and IV on Packet Loss Concealment algorithms (New) TD 356(P)

Technical Papers Document
ITU-T Technical Paper TP.FNTP "Firewall and NAT Traversal Problems in H.323 Systems" (Rev.) TD 311(P)
ITU-T Technical Paper TP.RTM "Roadmap for Telemedicine" (New) TD 318(P)
ITU-T Technical Paper TP.TACL "Telecommunications Accessibility Checklist" (New) TD 350(P)

Texts deleted or proposed for deletion by SG 16

Updates in the SG 16 management team and Rapporteurs 
(Click here for the complete list of SG 16 Rapporteurs)

  • Mr Istvan Sebestyen, Vice-chairman SG 16 and Chair of WP 2/16
  • Rapporteur for Q17/16 (Mr Tõnu Trump, Ericsson)
  • Rapporteur for Q21/16 (Mr Bastien Lamer, France Telecom)
  • Rapporteur for Q23/16 (Mr Dave Lindbergh, Polycom)
  • Rapporteur for Q25/16 (Mr Martin Euchner, Siemens Networks)
New Appointments:
  • Mr Paul Jones (Cisco, USA), as Rapporteur for Q26/16 (Accessibility to Multimedia Systems and Services, allocated to Plenary)
  • Messrs Pierre-André Probst and Noah Luo as Liaison Officers to the ITU-T JCA-NID
  • Mr Gary Sullivan as Liaison Officer to ISO/IEC JTC1 SC29 and its WG1 (in addition to WG11)
Open positions:
  • Rapporteur for Q17/16 (Voice gateway equipment, WP1/16)
  • Rapporteur for Q20/16 (MediaCom Project, allocated to the Plenary)
  • Rapporteur for Q21/16 (Multimedia Architecture, WP2/16)
  • Rapporteur for Q23/16 (Media Coding, WP3/16)
  • Rapporteur for Q25/16 (Multimedia Security in Next-Generation Networks, WP2/16)
  • Liaison Officer to ITU-T SG 9, 17; ETSI TISPAN; ISO TC215; 3GPPs, OMA and W3C
  • EWM Coordinator
Draft new Question 8/16 - Generic Sound Activity Detection 
(new Question)
  1. Motivation

    Voice Activity Detection (VAD) is widely used in telecommunications networks as a means of differentiating between wanted and unwanted in-band audio signals, for example to obtain trunking efficiency in circuit multiplication equipment; to ensure correct operation of echo control and other signal enhancement devices etc.

    The proposal for Generic Sound Activity Detection (GSAD) is motivated by two problems.
    1. With rapid changes in the telecommunication network environment, more and more multimedia services are being provided. Although the network is evolving from a voice to a multimedia network, most VAD algorithms are still mainly designed to handle voice signals and can not work properly in the presence of rich audio signals, which include voice, music, background environmental noise, information tones etc.
    2. Historically, VAD algorithms have been developed separately for individual network elements and applications, and there are currently numerous VAD algorithms. However, they are based on different principles, which make it difficult to provide common performance enhancements across all VAD’s.

    Therefore it is beneficial to develop a Generic Sound (rather than Voice) Activity Detector, which can be applied across a range of applications. The benefits from a standardised GSAD are:
    • Enhanced performance to deal with new types of in-band audio signals
    • Reduced development time and cost for new equipment requiring sound activity detection, eg codecs, circuit multiplication equipment, echo control, signal enhancement devices, VoIP gateways, terminal adapters etc.
    • Opportunity for use in existing speech and audio coders which do not include VAD

  3. Study items

    Study items to be considered include, but are not limited to:
    • Definition  and classification of applications and associated performance requirements for generic sound activity detection;
    • Definition of algorithm(s) suitable for generic sound activity detection meeting the applications and performance requirements;
    • Definition of the test conditions and evaluation procedures to be applied in selecting between candidate algorithms on the basis of objective and subjective performance, in conjunction with SG 12;
    • Selection and specification of procedures to be used in verifying the implementation of selected algorithm or algorithms.

  5. Tasks

    Tasks include, but are not limited to:
    • Develop Terms of Reference for GSAD algorithms for different applications
    • In conjunction with SG12, develop new Recommendations on testing methodologies
    • Solicit proposals and conduct selection test(s) for candidate algorithms to meet these Terms of Reference
    • Develop new Recommendation(s) based on the outcome of these selection test(s)

  7. Relationships

    • G.700-series speech and audio coding Recommendations
    • G.76X-series circuit multiplication Recommendations
    • G.799.X-series voice over IP gateway Recommendations
    • G.16X-series speech enhancement Recommendations
    • Q9, 10, 23/16 on speech coding;
    • Q11, 15, 16, 17, 18/16 on network signal processing.

    Study Groups:
    • ITU-T SG 2 to identify other potential user applications;
    • ITU-T SG 9 on applications within home networking;
    • ITU-T SG 11 on signalling requirements and protocols;
    • ITU-T SG 12 on voice quality evaluation of specified algorithms;
    • ITU-T SG 13 on the NGN Project;
    • ITU-T SG 19 on speech coding in IMT2000 and beyond;
    • ITU-R SG 8 to ensure compatibility with mobile transmission system constraints.
    Other Bodies:
    • ETSI (TISPAN);
    • TIA;
    • IETF;
    • 3GPP, 3GPP2.

Draft revised text for Question 6/16 – Video Visual coding

Title: Question 6/16 - Video Visual coding
(Continuation of Question 6/16)
  1. Motivation

    The goal of this Question is to produce Recommendations for video visual signal coding methods appropriate for conversational (e.g. videoconferencing and video telephony) and non-conversational (e.g., streaming, broadcast, file download, media storage/playback, or digital cinema) audio/visual services. Visual signal coding includes the coding of:
    • video sequences
    • still image
    • graphics
    • stereoscopic and multi-view visual information
    • light fields and volumetric imagery
    • computer displays
    • medical imaging
    This Question will focus on the maintenance and extension of existing video and still-image coding Recommendations, and laying the ground for new Recommendations using advanced techniques to significantly improve the trade-offs between bit rate, quality, delay, and algorithm complexity. Video, still-image, and other visual coding standards will be developed with sufficient flexibility to accommodate a diverse number of transport types (Internet, LAN, Mobile, ISDN, GSTN, H.222.0, NGN, etc.).

  3. Study Items
    • New coding methods in order to achieve the following objectives:
      • improvements in compression efficiency;
      • robust operation in error/loss-prone environments (e.g. non-guaranteed-bandwidth packet networks or mobile wireless communication);
      • reduction of real-time delay;
      • reduction of channel acquisition time and random access latency;
      • reduction of complexity;
    • Organization of the compressed data format to support packetization and streaming;
    • Methods to allow streams to be easily mixed by MCUs or terminals;
    • Techniques to permit networks or terminals to adjust the bit rate of video streams efficiently;
    • Techniques for object coding and multiview operation;
    • Techniques for efficient compressed-digital to compressed-digital processing (including transcoding).
    • The impact of colorimetry, video quality assessment, and quality control requirements on video codec development.
    • Computer graphics compression.
    • Security aspects that directly affect video and still-image coding including watermarking techniques.

  5. Tasks

    Tasks include, but are not limited to:
    • Maintenance of existing H-series video coding Recommendations, including H.120, H.261, H.262 | ISO/IEC 13818-2, H.263 and H.264 | ISO/IEC 14496-10;
    • Extensions to H.264: 2004-2008;
    • Conformance and reference software development for H.264;
    • Complete requirements definition and begin detailed algorithm design for H.265;
    • Final Rec. H.265: expected 20089-2010 (given sufficient progress in contribution technology);.
    • Maintain and extend existing Recommendations regarding still image coding, including Recommendations T.80, T.81, T.82, T.83, T.84, T.85, T.86, T.87, T.88, T.89, T.800, T.801, T.803, T.804, T.851, and T.870.

  7. Relationships

    • H.300-series Systems Recommendations;
    • H.222.0;
    • H.241;
    • H.245;
    • H.248;
    • T.80-series, T.800-series.
    • 20(A), 21(B), 22(C), 23(E), 24(F), 25(G), 26(H), 28(J), 1, 2, 4 of SG 16.
    Study Groups:
    • SGs 9, 11, 12, 13;
    • ITU-R SG 6 (in particular, Working Party 6M)
    Other bodies:
    • ISO/IEC JTC 1/SC 29 (MPEG and JPEG/JBIG) for harmonization of advanced coding objectives;


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