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Results of last SG 16 Meeting (20-30 January 2004)
Results from previous meeting(s): 2002-10 | 2003-05

Executive Summary of the meeting

Opening note:

The Study Group 16 Plenary observed one minute of silence to honour the passage last year of two of its distinguished members, Messrs Tom Geary (Rapporteur for Q.14 and long-time modem and fax expert) and John Magill (SG16 vice chair, chair of WPs 3 and 4, and media coding standardization guru) and remembered them from a series of pictures shown at the meeting. Not only their contribution, but principally their friendship, humour and joy will be deeply missed.

Major Plenary accomplishments:

  • Recommendations Consented: see list below.
  • Recommendations Decided/Determined/Approved: see text below.
  • Recommendations deleted or proposed for deletion: none
  • Other texts approved: implementersí guides, appendices, and supplements (see text below)
  • New Questions: In preparation for WTSA 2004 and following the advice from TSAG that "work should go on," SG 16 has prepared a set of revised questions for WTSA. This can be seen in the list below with the map of the documents for the meeting report. At this occasion, the Study group also approved the text of two new questions, which received support form several members and unanimous agreement of all present.

    One of them was Q.J/16 (on Multimedia framework for e-health applications), which was prepared last meeting and approved at this SG 16 meeting using the "normal" question approval procedure (WTSA 2000 Res.1 Clause 7.1.9.a); see below for the final text.

    The other question was a new Question 5 on "Control of NAT and Firewall Traversal for Multimedia Systems", which followed the "expedited" procedure in WTSA 2000 Res.1 Clause 7.1.9.c as it was felt by the Study Group as urgently needed and should start working immediately. See below for the approved text.

    The old Question 5/16 (on Mobility) was renumbered as Question K/16, as the Study Group felt that this should be a horizontal rather than vertical question. Also on the topic of the remaining of the revised questions, which will be approved by WTSA 2004, Study Group 16 has agreed that it will adopt the revised scope of the questions to continue the work, pending the final approval of WTSA 2004 of the new study group structure and text of questions.
  • Revised management team (see below).
  • List of interim meetings pre-approved: see related link.
  • Final text of outgoing Liaison Statements: see related link.
Map of meeting reports & Liaison Statements (as seen by the SG 16 Plenary)

  Plen WP1 WP2 WP3 WP4
Meeting Report - TD 88 (P) TD 89 (P) TD 80 (P) TD 85 (P)
Liaison Statements TD 92 (P) Annexes to
TD 88 (P)
TD 90 (P) TD 81 (P) &
TD 93 (P)
TD 86 (P)
Interim Meetings - TD 88 (P) TD 89 (P) TD 80 (P) TD 85 (P)
Text of Questions - TD 91 (P) TD 83 (P) TD 61 Rev.1 (P) TD 84 (P)

Q.A/16 (MediaCom 2004) [WP4]

Question A/16 discussed the general principles and different solutions to continue the development of the framework for Multimedia standardization for use both inside and external to the ITU, as it has been done until now within the MEDIACOM-2004 project. It has been decided to continue these coordination activities within Question A/16 and to keep the project name "MEDIACOM" for this purpose. The project description, the tasks and the database will be updated to reflect the last trends like NGN (next generation networks), HNE (home networks), HS (home services), ubiquitous services, etc.

Q.B/16 (Multimedia Architecture) [WP4]

Question B met on 5/22/2004 and 5/23/2004 and reviewed the liaisons and contributions listed below. Significant discussion was held regarding the work in SG13 concerning NGN, and on how multimedia services and applications are structured in the NGN framework. The architecture reference models presented in contributions D.414 and D.416 were used during the discussions as examples for services residing in such an architecture. QB reached agreement to begin a new work on a new proposed Recommendation H.saarch "End to end Open Services Architectural Framework". The text of the question was updated for continuation in the next study period.

Q.C/16 (Multimedia applications and services) [WP4]

Question C considered drafts of the Metadata Framework Recommendation as well as additional contributions to the work. A draft for F.MDF was produced which will be the basis for a final draft for Consent at the November 2004 meeting of Study Group 16. The meeting also considered initial proposals for new services: Messaging, Real-Time Collaboration, Distance Learning and Multimedia Conferencing on IP networks. During the interim period, an electronic discussion will take place regarding a possible revision of F.700. The text of the Question was updated for continuation in the next study period to include new work items e.g. real-time collaborative services.

Q.D/16 (Interoperability of Multimedia Systems and Services) [WP2]

Question D received one contribution on NAT and firewall issues. There was a lot of discussion generally reinforcing the need to create a Question dedicated to the study of NAT and firewall traversal issues. Question D experts also reviewed the text of the Question for the next study period, which includes H.323/SIP interworking as a major component, but it was decided to merge its contents into Q.2/16.

Q.E/16 (Media coding) [WP3]

At this meeting, Q.E agreed that the remaining Parts of JPEG-2000 would be moved forward for Consent at the next meeting of SG16, if the JPEG committee can supply suitable text for publication and identify an editor for these Recommendations in SG16. The text for the Revised Rec. T.81 was submitted by the ISO/IEC JTC1/SC29 Secretariat proposing changes to non-normative portions of the text. In considering the matter, SG 16 agreed to Approve the changes and recommended that the modifications be published as a corrigendum rather than a total republication of the text. The Question also reviewed its terms of reference for the next study period and will continue with an enlarged scope to be able to create new or revise existing Recommendations and be a starting point for other coding and speech recognition/speaker verification studies.

Q.F/16 (Quality of Service and End-to-end Performance in Multimedia Systems) [WP2]

The work on H.qos.arch was completed and presented for Consent. Co-ordination with other groups was progressed in a number of important areas via liaisons. The text of the Question was reviewed for the next study period. The services of the leaving Rapporteur were appreciated, who will be replaced by Mr Seong-Ho Jeong.

Q.G/16 (Security of Multimedia Systems and Services) [WP2]

Question G "MM Security" had a successful meeting and achieved the following results:
  • A new Amendment 1 to H.235V3 has been Consented. The amendment holds new Annex H to H.235 "Authentication Framework" and updates H.235V3 in terms of improved security.
  • Significant progress has been made upon draft H.235 Annex G "MIKEY for SRTP". New requirements for functionality have been identified, but the document needs further work; thus Annex G was not consented at this meeting.
  • Q.G has reviewed its Question text and positioned itself towards NGN-MM-SEC. New ideas of promising potential study items have been identified.
Further, the scope of the question was updated for continuation in the next study period. It will focus on new Recommendations and maintenance of still evolving specifications. Recommendations which are mature had their maintenance moved to Q.1/16.

Q.H/16 (Accessibility to Multimedia Systems and Services) [WP1]

The main work items for Q.H/16 in this meeting were text conversation in and through IP networks, where support is provided to Q.11/16 for text transit through IP networks (V.ToIP, V.VBD). Work is going on in Q.H/16 to describe the requirements on text conversation in IP networks. Work for inclusion of the robust modem CTM specification in the text telephone modem standard V.18 was intensified.

The Question will continue in the next study period and its text has been redrafted, with new work items (for example interface specifications for the interface between communication devices and accessible user interface devices). The overall task of the Accessibility question is to promote inclusive design from the beginning in all ITU-T standards.

Q.I/16 (Use of public telecommunication services for emergency and disaster relief operations) [WP4]

The text for Q.I/16 was revised (see TD 84/PLEN) to clearly delimit the scope of Q.I/16 to TDR aspects of multimedia applications and services. This distinguishes from the work in Q.3/2 on TDR aspects of the International Telephone Service defined by E.105. The Q.I/16 work program has also been updated and now will focus on the following two study items:
  • A "TDR Requirements" Recommendation is needed to define TDR aspects of multimedia applications and services, i.e., the use of multimedia capabilities of the international public telecommunication services and evolving networks by authorities for disaster relief operations.
  • A "TDR System Framework" Recommendation is needed that will explain how network, service, and operational capabilities can be used to allow TDR communications originating from authorized users to have preferential access to network resources.
With this new organization, the work on F.706 will be discontinued.

Q.J/16 (Multimedia framework for e-health applications) [WP4] At this meeting, the experts finalized the text of the new Q.J, which was approved at the closing Plenary of SG 16. The experts confirmed the tasks and work plan in the text of the question and for such agreed to:
  • Arrange a meeting of the E-health Standardization Coordination Group (eHSCG) and promotional activities during Med-e-Tel 2004 in Luxemburg, 21-23 April 2004
  • Organize the Structure for contents on the web page for Q J/16
Q.1/16 (Multimedia systems, terminals and data conferencing) [WP2]

Question 1 was successful in completing the work on revising the H.320-series Recommendations along with the addition of support of MPEG-4 audio in H.320 terminals. Question 1 prepared five Recommendations and one Corrigendum for Consent (H.221, H.222.0 Amendment 3, H.230, H.241, H.242, H.320) and three Implementorsí Guides for Approval (H.239, H.320, T.120). The experts also reviewed the text of the question for continuation in the next study period. The question has strengthened its aspect of maintenance by taking over responsibility for maintaining various mature security-related Recommendations.

Q.2/16 (Multimedia over packet networks using H.323 systems) [WP2]

Question 2 successfully completed work on seven new Recommendations during this meeting. The new Recommendations provide enhancements to the H.323 protocol in areas including diagnostics, services, call routing, PSTN interworking, MLPP, emergency services, and scalability. In addition, it agreed to put forward a revised H.323 Implementorsí Guide and a revised H-Series Supplement 4 (Repository of Generic Parameters for ITU-T H.460.x sub-series) at this meeting. The Question also identified a number of new work items, which have been added to the work programme for Question 2. The scope of the Question has been revised for the next study period and which will also encompass interoperability aspects, in particular between H.323 and SIP. The question also took over the maintenance of H.245, H.246 and H.341 from Question 3.

Q.3/16 (Infrastructure and interoperability for Multimedia over packet networks) [WP2]

Q.3 had an extensive work program at the meeting and submitted fifteen texts for Consent (five new Recommendations and ten corrigenda/amendments). The question also submitted for approval two Implementorsí Guides and a revision to H-Series Supplement 2. Work progressed but was not concluded for H.245v11, H.248.1v3, H.248.dcc, H.248.1 Annex F, H.248.26 Amd.1, H.248.29, H.341 v2, H.248.PCMSB and H.248.2 v2. Also, Q.3 reviewed the text of the question for the next study period, which will focus on the maintenance and evolution of media gateway protocol specifications for multimedia systems. The maintenance aspects of H.245, H.246 and H.341 were transferred to Question 2.

Q.4/16 (Video and data conferencing using Internet-supported services) [WP2]

This Question has completed a new draft Recommendation H.350.6 "Directory Services Architecture for Call Forwarding and Preferences" for Consent. This specification provides a simple LDAP and X.500 schemas to represent call forwarding and call preference information in an H.350 directory. It has also produced new H.350-series Implementorsí Guide addressing implementation concerns associated with white pages applications, clarifies the use of H.225 partyNumber, and gives an ASN.1 representation of H.350 object classes for use in X.500 series directories. It is noted that the ASN.1 representation work is an outcome of the close collaboration with Q.9 of SG17. The question re-scoped its work programme for the next study period and will concentrate on advanced multimedia communication service features on top of the ITU-T defined multimedia system platforms.

Q.5/16 (Mobility for Multimedia Systems and Services) [WP2]

The question has prepared a drafted technical report on mobility between H.323 systems and GPRS/IMT2000 networks. This report provides a proposal on using the H.323 mobility management protocol in combination with GPRS/IMT2000 mobility management procedures. Public Mobile Networks, which offers GPRS, EGPRS and/or UMTS services could be extended by H.323 environment to allow a combined GPRS/UMTS and H.323 Mobility Handling. H.323 users with an appropriate handset and an additional PLMN subscription would be able to conveniently move between H.323-based environments and mobile networks as well as between public and private H.323 networks. In general it has to be stressed that Q.5/16 work items are currently progressing still very slowly because of lack of contributions.

For the next study period, the text of the question was updated highlighting the accomplishments in the 2001-2004 study period and the work that remains to be done. The question will continue as a horizontal question and had been renamed to Question K/16.

Q.6/16 (Advanced video coding) [WP3]
  • A revision to Annex X to Recommendation H.263 has been Consented that adds a new level requested by 3GPP SA4. This new level (denoted level 45) will suit mobile applications by defining a conformance point with relatively low image resolution but with higher bit rate support at that resolution and that also has the capability to support low-resolution custom picture formats and custom picture clock frequencies.
  • The question prepared and Consented a Corrigendum to Rec. H.264 correcting minor defects to clarify correct interpretation of the existing technical specification. As H.264 has not yet been published in final form, it was requested that this corrigendum, once approved, be incorporated in the text to be published by ITU.
  • The workplan of the JVT was discussed, including results of the co-located JVT meeting held during this meeting of Study Group 16. The results of the recently completed verification tests were reviewed, which showed that H.264 achieved a coding efficiency improvement of 1.5 times or greater in 78% (66 out of 85) of the statistically conclusive cases, out of which 77% (51 out of 66) show improvements of 2 times or greater. The group supported the ongoing work on conformance, reference software, and bitstream exchange for the existing content of H.264, and the continuation of the development of the extensions to H.264 supporting applications that require greater sample precision and increased chroma sampling resolution (known as the "professional" or "fidelity range" extensions).
  • It was agreed that the JVT collaboration should continue through July 2004 to complete the afore-mentioned work and two Rapporteurs meetings (in the context of JVT) were planned. The SG 16 Plenary invited Q.6 to consider ways to better maintain and keep synchronized the specification with the counterpart in ISO/IEC. One of the suggestions was to maintain the JVT group with modified terms of reference geared towards maintenance of H.264.
  • The Question also reviewed its mandate for the next study period that will continue to study advanced video coding techniques aiming at identifying the first building blocks for a long-term, future coding technique providing at least a 2:1 compression gain over H.264 that could be approved in the 2008-2010 time frame.
Q.7/16 (Wideband coding of speech at around 16 kbit/s) [WP3]

The main objective of the meeting was to review updates to the G.722.2 Annex C C-code software (which is aligned with the 3GPP AMR-WB specification). The proposed software changes were agreed to be included in the new revision of G.722.2 Consented at this meeting, in order to keep the alignment between the 3GPP and ITU-T versions of the specification. Question 7/16 will not continue in the next Study Period; its maintenance aspects will be covered by Q.10/16 and any future wideband speech coding work will be covered by either Q.10/16 or Q.E/16.

Q.8/16 (Encoding of speech signals at bit rates around 4 kbit/s) [WP3]

As agreed at the October 2002 meeting of SG16, work on Question 8/16 has been suspended. Consequently there was no discussion on this topic. The question will be discontinued in the next study period and any follow-up of the work that has been frozen will be considered under Q.E/16.

Q.9/16 (Variable bit rate coding of speech signals) [WP3]

The main objectives of the Q.9/16 meeting were to finalize the Terms of References (ToR) for both the MSC-VBR and the EV approaches. Even though extensive review of the ToRs for MSC-VBR and especially for EV was made based on contributions and LS received, experts still identified the need for further discussions on several major aspects. Consequently, it was agreed to invite contributions on still-opened items and have ToRs discussions using the e-mail reflector and at a planned interim meeting to finalized and approve the ToR.

Continuation of the Question in next study period was agreed and the updated text for the Question was prepared.

One interim meeting is planned (tentatively 15-18 June 2004) to advance the work for finalizing and approving the ToRs, and also to establish the agreements on further schedules and process.

Q.10/16 (Software tools for signal processing standardization activities and maintenance of existing voice coding standards) [WP3]

As regards Software Tools aspects of the question, the major development is the work performed by the Ad-hoc Group on Basic Operators to review weights and consider alternative set of basic operators. The group reviewed the two documents submitted to Q.10 at this meeting describing the current status of this work. The group agreed to continue the correspondence work using the WP3 audio email reflector. Karim Djajarin/Texas Instrument was appointed as the editor of the G.191 part related to the basic operators. A communication to 3GPP and 3GPP2 on the basic operators (TD-81/PLEN) has been prepared.

As regards the Maintenance aspects of the question, an Implemeterís Guide to G.728 was prepared to address an error found in its Annex I (TD 57/PLEN). There was a proposal to modify the VAD of G.729 Annex B and it was discussed whether the proposed modifications, as well as those proposed in COM16-3, have to be considered as bug corrections to G.729 annex B VAD or as an alternative enhanced VAD. The experts agree to continue the discussion by correspondence and to provide a common proposal at the next Rapporteurs meeting, planned for 15-18 June 2004. It was agreed to allocate to Q10 the standardization of an embedded coder with a core that is bitstream interoperable with G.729. This will also be progressed by correspondence and it is aimed that the final ToR for this work will be completed and approved at the Rapporteurs meeting in June. The Study Group has given this authority to the question.

The text of the question has been reviewed for the next study period. Q10/16 will continue its software tools aspect and has enlarged its maintenance role for existing speech coding Recommendations to be responsible for all wideband speech coders of the G.7xx series (including G.722.2, previously under Q.7/16) and to be able to create extensions for the existing speech coding Recommendations.

Q.11/16 (Voiceband Modems: Specification and Performance Evaluation) [WP1]

Q11 and Q13 met jointly and have agreed to create a draft corrigendum for corrections to V.150.1. The group progressed the work on a new Recommendation for voice band data only gateways (V.152). V.152 was almost submitted for consent but due to some minor issues it was decided to wait until the next meeting. Work is progressing on V.ToIP (V.151) per schedule.

Question 11 will continue in the next study period and it has been re-scoped to encompass all modem-related work, reflecting the mature state of the technology.

Q.12/16 (DCE-DCE Protocols for the PSTN and ISDN)

There were no contribution addressed to Question 12/16, and consequently there was no discussion on this subject. At the meeting, it was agreed that the Question will be merged with Q.11 for the next study period.

Q 13/16 (DTE-DCE Interfaces and Protocols) [WP1]

Q.13/16 met jointly with Q.11, see report above. At the WP1 Plenary, it was agreed that the Question will be merged with Q.11 for the next study period.

Q.14/16 (Facsimile terminals of Groups 3 and 4) [WP1]
  • Q.14 worked on a corrigendum to justify the D65 illuminant data in T.42, which was Consented by SG 16.
  • A new proposal to T.44 amendment for the addition of YCC was reviewed and it was agreed to continue the discussion using Q14 mailing list with an agreed goal of Consent at the next SG 16 meeting.
  • Regarding T.38, support of RTP was reviewed and agreed. Clarification of version negotiation and how to use "no-signal" T30_indicator were done and were also agreed. As a consequent, Q.14 proposed a new amendment to T.38, which was Consented by SG 16. Additionally, the question prepared a new Appendix V to T.38 with implementation guidelines, which was approved by SG 16. Discussions on a new field for vendor information for SIP/SDP call-setup were held but the topic is open for further study.
  • The text of the Question was reviewed and updated for continuation of its studies in the next study period.
Q.15/16 (Distributed Speech Recognition and Distributed Speaker Verification) [WP3]

There were no contribution addressed to Question 15/16, and consequently there was no discussion on this subject. It was agreed that the question will be discontinued in the next study period but any contributions on this regard will be initially addressed in Q.E/16.

Recommendations Consented by SG 16 on the closing Plenary

Consented Recommendations for AAP posting Documents* AAP/LC
V.150.1 Corrigendum 2 - Modem-over-IP networks:  Procedures for the end-to-end connection of V-series DCE TD 47 (P) AAP71**
T.42 Corrigendum 1 - Continuous-tone colour representaion method for facsmile TD 48 (P) AAP71**
New T.38 Amendment 2 - Support of RTP, version negotiation, insertion of "No signal" TD 62 (P) AAP71**
Rev. H.320 - Narrow-band visual telephone systems and terminal equipment TD 45 (P) AAP71**
Rev. H.221 - Frame structure for a 64 to 1920 kbit/s channel in audiovisual teleservices TD 42 (P) AAP71**
Rev. H.230 - Frame-synchronous control and indication signals for audiovisual systems TD 43 (P) AAP71**
Rev. H.242 - System for communication between AV terminals using channels up to 2 Mbit/s TD 44 (P) AAP71**
Corrigendum 1 to H.241 - Extended video procedures and control signals for H.300-series terminals TD 67 (P) AAP71**
New H.222.0 Amd. 3 - Carriage of H.264 streams over H.222.0 TD 66 (P) AAP71**
New H.460.9 Annex B - Extended reporting TD 38 (P) AAP71**
New H.460.10 (H.460.cpc) - Call Party Category TD 30R1 (P) AAP71**
New H.460.11 (H.460.delayed) - Delayed Call Establishment within H.323 Systems TD 27R1 (P) AAP71**
New H.460.12 (H.460.gci) - Glare Control Indication TD 31R1 (P) AAP71**
New H.460.13 (H.460.hold) - Called User Release Control TD 39 (P) AAP71**
New H.460.14 (H.460.mlpp) - Multilevel Precedence and Preemption TD 54 (P) AAP71**
New H.460.15 (H.460.suspend) - TCP Channel Suspension TD 49 (P) AAP71**
Corrigendum 1 to H.248.1 Version 2 - Gateway Control Protocol: Version 2 TD 59R1 (P) AAP71**
Corrigendum 1 to H.248.3 - User Interface elements and action packages TD 23 (P) AAP71**
Corrigendum 1 to H.248.4 - Transport over SCTP TD 24 (P) AAP71**
Corrigendum 1 to H.248.7 - Generic announcement package TD 25 (P) AAP71**
New Amendment 1 to H.248.8 - Error codes and service change reason description TD 26 (P) AAP71**
Corrigendum 1 to H.248.16 - Enhanced digit collection packages and procedures TD 68 (P) AAP71**
Corrigendum 1 to H.248.17 - Line test packages TD 69 (P) AAP71**
New H.248.19 - Decomposed MCU, Audio, Video and Data Conferencing Packages TD 33 (P) AAP71**
New H.248.21 - Semi-permanent Connection Handling Package TD 34 (P) AAP71**
Corrigendum 1 to H.248.23 - Enhanced Alerting packages TD 70 (P) AAP71**
Corrigendum 1 to H.248.25 - Basic CAS Packages TD 71 (P) AAP71**
Corrigendum 1 to H.248.26 - Enhanced analog lines packages TD 72 (P) AAP71**
New H.248.28 - International CAS Packages TD 58 (P) AAP71**
New H.248.30 - RTCP XR Packages TD 22R1 (P) AAP71**
New H.248.31 - Adaptive Jitter Buffer Package TD 75 (P) AAP71**
New H.350.6 - H.350.6 Directory Services Architecture for Call Forwarding and Preferences TD 51 (P) AAP71**
New H.360 (ex-H.QoS,Arch) - An Architecture for End-to-End QoS Control and Signalling TD 76 (P) AAP71**
New H.235 V3 Amendment 1 (including corrections) - Security and encryption for H-series (H.323 and other H.245-based) multimedia terminals TD 73 (P) AAP71**
Draft Rev. G.722.2 Annex C - Wideband coding of speech at around 16 kbit/s using Adaptive Multi-rate Wideband (AMR-WB): Fixed point C Code TD 53 (P) AAP71**
Corrigendum 1 to H.264 - Advanced Video Coding for Generic Audiovisual Services  TD 56 (P) AAP72**
Revised Annex X to H.263 - Video Coding for Low Bit Rate Communication: Profiles and Levels Definition (TD 52/PLEN) TD 52 (P) AAP71**
ŗ None at this meeting.    
 *: 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

ISO/IEC JTC 1/SC 29 submitted a revised text for ITU-T T.81 | ISO/IEC 10918-1 which contained updated only of non-normative aspects of the Recommendation. Consequently, according to the procedures in force, the text in TD 50 (P) was approved at this meeting and the changes will be issued as a corrigendum to (and not republication of) T.81 | ISO/IEC 10918-1. (Note: see also TD 65 (P) for delta document relative to the published version of T.81 | 10918-1.)

Recommendations Decided by SG 16 on the closing Plenary


Other texts approved by SG 16

Texts approved Documents Revision Level
T.38 Appendix V Ė Implementation Guidelines TD 29 (P) -
New H.239 Implementorsí Guide TD 77 (P) A
Revised H.320 System Implementorsí Guide (H.320, H.221, H.224, H.230, H.242, H.243) TD 40R1 (P) C
Revised H.323 System Implementorsí Guide (H.323, H.225.0, H.245, H.246, H.283, H.235, H.450 Series, H.460 Series and H.341) TD 46 (P) C
Revised H.248 Sub-series Implementorsí Guide (excluding H.248.1 V1) TD 60 (P) D
New Implementorsí Guide for H.248.1 Version 1 (Gateway Control Protocol) TD 55R1 (P) A
New H.350-series Implementorsí Guide TD 58 (WP2) A
Revised T.120-series Implementorsí Guide TD 41 (P)  
Revised H-Series Supplement 4 - Repository of Generic Parameters for ITU-T H.460.x sub-series TD 79 (P) V2
Revised H-Series Supplement 2 - H.248 Sub-Series: Packages guide (Release 5) TD 64 (P) V5
New G.728 Implementorsí Guide TD 57 (P) A

Texts deleted or proposed for deletion by SG 16


Updates in the SG 16 management team and Rapporteurs

  • Mr Stephane Py (France Telecom, France) as Associate Rapporteur for Q.B/16
  • Mr Mike Buckley (UK) as Rapporteur for Q.F/16
  • Mr. Stephen Perschau (USA) as a.i. Rapporteur for Q.I/16
  • Mr. Rosario Drogo de Iacovo as Rapporteur for Q.7/16
New Appointments:
  • Mr Seong-Ho Jeong (Korea) as Rapporteur for Q.F/16
  • Mr Ronald Roman (Telcordia, USA) as Rapporteur for Q.I/16
  • Mr Vicente Traver (Spain) as Rapporteur for Q.J/16
  • Mr Leo Lehman (OFCOM, Switzerland) as Rapporteur for Q.K/16 (ex-Q.5/16)
  • Mr Robert Gilman (Avaya, USA) as Rapporteur for new Q.5/16
Open management positions:
  • Chairman of WP 3/16 (Media Coding)
  • Chairman of WP 4/16 (Multimedia Framework)
  • Rapporteur for Q.A/16 (MediaCom Project, allocated to WP 4)
  • Rapporteur for Q.14/16 (Facsimile terminals of Group 3 and Group 4)
Note: As for Q.D, 7, 8 and 15/16, the Questions will be discontinued in the next study period and as no interim activities are planned, no replacement is sought for their positions.

Approved text of a new question on E-health in SG 16

The following is an extract from TD 84/Plen:

Title: QUESTION J/16 - Multimedia framework for e-health applications
(new question)


The evolution of advanced digital telecommunication techniques has enabled the development of MM-systems to support e-health applications, in particular in the area of Telemedicine.

E-health designates the use of Information and Communication Technology (ICT) means to support health needs, while Telemedicine is considered as that part of e-health where telecommunication systems allow interconnecting remote locations and to access distant resources. Examples of Telemedicine applications are teleconsulting, teleradiology, telesurgery, etc. (See note below for the definitions from the World Health Organization.)

This question focuses on standardization of Multimedia Systems to support e-health applications.

In order to allow a wide deployment of e-health applications (with an initial focus on Telemedicine applications), in particular in developing countries, it is important to achieve interoperability among systems and to reduce the cost of devices through economies of scale. Consequently, the development of global international standards with the involvement of the major players (governments, inter-governmental organizations, non-governmental organizations, medical institutions, doctors, etc.) is a key factor to achieve these objectives.

Considering the fact that many organisations are already active in this field with which ITU has existing cooperation agreements and that in addition to technical issues, there are a number of other aspect to be considered (e.g. legal, ethical, cultural, economics, regional), it is considered that ITU-T can provide the right environment to harmonize and coordinate the development of a set of open global standards for e-health applications.

In the framework of this generic question, Study Group 16, as lead study group for Multimedia Terminals, Applications and Services, will coordinate the technical standardisation of Multimedia systems and capabilities for e-health applications in ITU-T and will develop corresponding Recommendations.

The improvements and additions to the specific characteristics of Multimedia Systems and Terminals will be addressed within the relevant equipment related questions of Study Group 16.

Note: According to the World Health Organization, Telemedicine is "the use of information and communication technology to deliver medical services and information from one location to another", while e-health is "a new term used to describe the combined use of electronic Information and Communication Technology (ICT) in the health sector".

Study items
  • Identification of users' requirements
  • Multimedia framework (including overall concept) for e-health applications (and Telemedicine, in particular)
  • Roadmap for e-health (including Telemedicine) standards
  • Generic Architecture for e-health applications (and Telemedicine, in particular)
  • Specific system characteristics for e-health applications (e.g. video and still picture coding, audio coding, security, directory architecture, etc).

Tasks include, but are not limited to:

  • Inventory of existing e-health / Telemedicine standards
  • Creating and maintaining a high-visibility web page documenting the progress of the question
  • Roadmap for e-health / Telemedicine standards, compiling and analysing standardisation requirements from e-health stakeholders and identifying standardisation items with priorities
  • Develop a Recommendation "Generic Architecture for Multimedia
    Telemedicine Applications"
  • Provide inputs for extension and improvement of existing Recommendations on MM-Systems (e.g. H.323, H.264, V.18,...)
  • Develop new Recommendations if necessary

An up-to-date status of work under this Question is contained in the SG 16 Work Program.

  • Recommendations:
    • H.300-series, H.260-series, V.18, T.80-series, T.800-series
  • Questions:
    • A/16, B/16, C/16, D/16, E/16, F/16, G/16, H/16, I/16, K/16, 1/16, 2/16,3/16, 4/16, 6/16
  • Study Groups:
    • ITU-T/SG 9, SG12, SG17, SSG
    • ITU-D/SG2
    • ITU-R/SG8, SG9
  • Other bodies:
    • E-health Standardization Coordination Group (eHSCG)
    • ISO, IEC, CEN, ETSI, IETF, IEEE and other relevant standardisation bodies
    • HL7, DICOM and other relevant forums and consortia

Approved text of a new question on NATs and firewall traversal in SG 16

The following is an extract from TD 83/Plen:

Title: QUESTION 5 - Control of NAT and Firewall Traversal for Multimedia Systems
(New Question)


By its very definition, the Internet is comprised of an interconnected collection of public, enterprise, and private IP networks. Increasingly, even large private networks share many of these same characteristics with the Internet. These individual networks are often interconnected through firewalls or other types of remote access devices, which, in addition to filtering traffic according to pre-administered or dynamic rules, often perform some type of network address and/or port translation (NAT). The reasons for such services include both necessity (IP address reuse) and security:
  • preventing unauthorized outside access to internal services;
  • hiding internal network addresses from the public internet;
  • hiding internal network topologies;
  • providing public access to (selected) internal addresses;
  • compensating for scarcities of IPv4 addresses;
  • providing conversion between public and private IP addresses;
  • providing conversion between IPv4 and IPv6 addresses.
These types of firewall operation have proven problematic for multimedia protocols that require the dynamic assignment and exchange of transport addresses for media and signalling. Previous efforts to develop solutions to this collection of problems have resulted in inefficient solutions (e.g., application level gateways), limited solutions (e.g., UDP tunnelling of IPSec), or limited progress (e.g., midcom). Nevertheless, the need for robust solutions that will make the deployment of multimedia communication easy for service providers, enterprises, and home users has not abated, especially in light of increased security requirements and the increasing deployment of multimedia applications. A practical solution that is easy for all users to deploy will contribute to the success of the Next Generation Network.

As a practical matter, it is expected that much use will be made of existing work.

Study Items
  • Service requirements for Firewalls, including access policy enforcement, inter-network policy enforcement, configurations, operations, and security;
  • Architecture of communications devices and network(s), configuration of telephony elements, multimedia applications, and firewalls;
  • Appropriate control protocol(s) that ensure security;
  • Support of signalling and media transport protocols;

Tasks include, but are not limited to:
  • Define Requirements (3Q 2004).
  • Develop Architecture Specification (1Q 2005):
    • Control Elements;
    • Firewalls;
    • Access policy;
    • Inter-network policy;
    • Gatekeepers, Gateways, SIP Proxies, SIP Registrars, and Endpoints;
    • Network Topologies;
    • Robustness.
  • Define Protocols (1Q 2006):
    • Controller/Firewall Authentication;
    • Firewall and NAT Control;
    • Robustness.
An up-to-date status summary of work under this Question is contained in the SG 16 Work Program.

  • Recommendations:
    • H.225.0, H.245, H.248, H.235,H.323, H.501
  • Questions:
    • Question D, F, G, K, 1, 2, 3, 4/16
  • Study Groups:
    • ITU SG11, SG13
  • Other Bodies:
    • IETF


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