|Results of last SG 16 meeting (October 2002)
Executive Summary of the meeting
Major Plenary Accomplishments:
- Recommendations Consented: see list below.
- Recommendations Decided/Determined: see text below.
- Recommendations deleted or proposed for deletion: none
- Other texts approved: implementors guides (see below)
- New/Revised Questions: The revision of Q.C/16 to include meta-data related studies was approved.
New Q.I/16 on ETS/TDR was approved, see Q.C and Q.I below.
- Formal approval of the Full-Service VDSL Focus Group: the SG 16 Plenary was briefed on the contents
of TD Plen/16 16 and 17 about the creation of the FS-VDSL Focus Group and the progress report of its
meeting. The group will produce technical specifications in support of video-centric services using VDSL
architecture. SG 16 unanimously approved the creation of the group.
(See also the FG home page, http://www.itu.int/ITU-T/studygroups/com16/fs-vdsl)
- Revised management team (see below).
Q.A/16 (MediaCom 2004) [WP4]
The Question A/16 activity at this meeting was limited to a review of
incoming liaison material and other material relevant to the Mediacom 2004
project document. The revision of the document will continue after the
meeting and it is intended to convert the document to a more user-friendly
Q.B/16 (Multimedia Architecture) [WP4]
There were no contributions directly relating to multimedia architecture.
The meeting reviewed incoming Liaison Statements, and the documents
concerning the work of the new FS-VDSL Focus Group. It was agreed that the
FS-VDSL Recommendation on system architecture would be progressed by
Q.C/16 (Multimedia applications and services) [WP4]
Question C considered the revision of its question to include Metadata
and agreed to the revision. It was also agreed to accept the work on Part 5
(OAM&P) of the FS-VDSL Focus Group to be developed into a new ITU-T
Recommendation. That work will take place under a new Associate Rapporteur.
Draft ITU-T Recommendation F.706 was again reviewed taking into
consideration comments received from the United Kingdom and Germany.
Consensus could not be reached within Question C on the revised draft of the
Recommendation but work will continue toward acceptable text for approval at
the May 2003 meeting of Study Group. The latest text of draft Recommendation
F.706 is attached as Annex Q.C.1 to this report.
This was the first meeting to consider the new work item on Metadata. The
group drafted and accepted a Metadata Development Plan, Annex Q.C.2.
Question C again had no contributions on E-commerce/e-business.
Consideration was give as to how to proceed with this work considering the
lack of contributions. The ITU-T contact for the ITU/IEC/ISO MoU on
e-business was invited to attend the WP4 plenary to update WP4 on this
activity, and review possible areas where SG16 could provide support to the
Q.D/16 (Interoperability of Multimedia Systems and Services) [WP2]
Given lack of contributions during this meeting, Question D did not hold
a separate meeting. All documents addressed to Question D were addressed
jointly to and discussed in related WP2 questions. In particular, said joint
material was addressed in Questions 2, 3, F, and G.
Q.E/16 (Media coding) [WP3]
At this meeting, Q.E/16 agreed to:
- Move draft Rec. T.803 (TD-26 WP3) forward to WP3 for Consent.
- Reaffirm its earlier decision to end the joint work with JPEG on
- Begin a new work project to produce a “Media Coding Summary Table”,
with input from SDOs outside ITU.
Q.F/16 (Quality of Service and End-to-end Performance in Multimedia
At the Q.F meeting three new liaison statements were reviewed. Other
liaison statements which were of relevance to Q.F had been addressed at the
June rapporteurs’ meeting. Contributions D.268 and D.277 were looked at
and an editorial session of H.qosarch was held.
Q.G/16 (Security of Multimedia Systems and Services) [WP2]
Q.G made important progress in the area of multimedia security. The
following highlights outline the major results achieved:
- Recommendations H.233 and H.234 addressing multimedia security for
circuit-switched A/V systems have been revised to include improved security
techniques. Both revised recommendations were consented for AAP approval.
- Draft revised recommendation H.235V3 - despite significant progress
has been achieved - was not yet stable enough and it was decided to postpone
consent until the next SG meeting.
- Coordinative undertaking was made in the area of Emergency
Telecommunications security jointly with Q.I/16, SG17 and ETSI TIPHON.
Q.H/16 (Accessibility to Multimedia Systems and Services) [WP1]
Q.H/16 agreed an amendment to V.18, removing an ambiguity from Annex A
which deals with the operation of textphones built in accordance with ANSI
TIA/EIA-825 (2000). The ambiguity had caused implementation problems.
It was agreed to start studies on using textphones over IP networks in a
way analogous to V.MoIP (V.150.1), initially defining requirements for other
Questions and, later, studying other aspects of text communication over IP.
Q.H/16 also created a draft proposal for a workshop on accessibility. The
question will continue to develop ToIP in coordination with Q.11 and further
the Workshop on Accessibility.
Q.I/16 (Use of public telecommunication services for emergency and
disaster relief operations) [WP4]
This is a new question, which was formally approved at this SG 16
meeting. Its final approved text can be found at
The focus of this question is to address public telecommunication services
that authorities can use to communicate during emergency and disaster
operations. This capability is referred to as the emergency
telecommunication service (ETS), and will enable communications from
authorized users to have preferential treatment for organizing and
coordinating disaster relief operations. Preferential treatment is
particularly important because telecommunication networks often experience
severe stress during these events due to high traffic demands, bandwidth
limitation, and possibly infrastructure damage. The question will establish
close cooperation and liaison (coordination) among the many Study Groups and
other organizations working on this field. At this meeting, in addition to
finalise the text of the question, the group also prepared questionnaire to
be sent to Administrations in a Circular Letter (see TD.89/Plen).
Q.1/16 (Multimedia systems, terminals and data conferencing) [WP2]
Question 1/16 has finalized enhancements to the security of
communications over ISDN networks (H.320 systems) by adding new encryption
algorithms and correcting inconsistencies in H.233 and H.234 which have been
revised at this meeting. Question 1/16 has also started an effort on the
signalling requirements for H.264 in H.320 and H.324 systems.
Q.2/16 (Multimedia over packet networks using H.323 systems) [WP2]
Question 2 was successful in completing the work required in order to put
a total of eight new draft Recommendations forward for consent, one revised
Annex to Recommendation H.225.0 forward for consent, and the H.323-Series
Implementers Guide forward for approval. There were a number of new features
and enhancements approved for H.323 systems during this meeting. Of these,
the work on Modem over IP is probably the most notable, which is the result
of excellent cooperation and coordination with Questions 3 and 11.
Q.3/16 (Infrastructure and interoperability for Multimedia over packet
Question 3 recommended six new recommendations for consent (H.248.11,
H.248.16, H.248.17, H.248.18, H.248.20, H.248.12 Annex A) and one new
version for consent (H.245v9) as well as approving new versions of H.248
Implementors Guide and Supplement 1 (Draft Packages). Work progressed on
other recommendations, such as new versions of H.341 and H.246 Annex C, and
new H.248.1 Annex F and H.248.19.
Q.4/16 (Video and data conferencing using Internet-supported services)
Q.4/16 decided to create a new Recommendation on directory services
architecture for multimedia conferencing that specifies an LDAP schema for
representing multimedia conferencing endpoints in a directory. The
architecture allows association of endpoints with users or conference rooms
and enables a variety of important applications including white pages,
portals, clickable dialing, electronic address books. The target approval
date is May 2003.
Q.5/16 (Mobility for Multimedia Systems and Services) [WP3]
Q.5/16 seemed to raise very little interest (lack of contributions,
shortage of editors). As a consequence, work items had to be rescheduled.
Currently work progresses on H.500, the mobility overview and framework,
with a new target date of May 2003. For H.550 an initial draft is expected
for February 2003. Other items on the Q.5/16 schedule are uncertain.
Q.6/16 (Advanced video coding) [WP3]
In the interim period since the last meeting of SG16, three meetings of
the Joint Video Team (JVT) established with ISO/IEC JTC1/SC29/WG11 (MPEG)
were held. Two of these meetings also included meeting sessions of Q.6 not
held as joint activity. Each of these meetings has far exceeded 100
registered participants and 100 registered contribution documents each. The
work of the JVT has progressed well toward the drafting of
technically-aligned text to be approved in ITU-T as Recommendation H.264 and
in ISO/IEC as International Standard 14496-10 "Advanced Video
Coding". Industry interest in the H.264/AVC standardization project is
very keen, and significant technical progress has been made toward a final
The joint specification is currently at the Final Committee Draft stage
of the ISO/IEC approval process and is converging well toward a final text.
The project has demonstrated significant gains in video compression
efficiency relative to prior standards and the design also offers a new
degree of flexibility for use with a wide variety of network and system
environments. We believe the new video coding Recommendation will be
appropriate for use for a broad variety of applications. We suggest a
meeting of Working Party 3 of SG 16 on or about 13 February 2003 for AAP
Consent of the new Recommendation.
Q.7/16 (Wideband coding of speech at around 16 kbit/s) [WP3]
The test results of the ITU-T G.722.2 characterization phase were
reviewed and approved. All laboratory reports were judged compliant with the
The group agreed to submit for approval a new Annex to G.722.2 on its
usage in H.245 and a new Implementor’s Guide for G.722.2 collecting some
editorial, C-code, and compatibility related changes.
Q.8/16 (Encoding of speech signals at bit rates around 4 kbit/s) [WP3]
No decision could be reached at the February 2002 meeting of SG16 on how
to proceed with the work on the 4 kbit/s speech coding work (see COM 16-R17,
§5), and so the objective for this meeting was to review any interim
progress and assess whether a decision could now be made.
Although it is claimed that both coders have been improved in the interim
period, there has been no change in opinions which would allow agreement on
the way to proceed. Accordingly it is proposed to suspend the work.
The test results for the latest coders (including results of some tests
in the Chinese language) will be sent to SG12 - SQEG for information.
Q.9/16 (Variable bit rate coding of speech signals) [WP3]
Q.9/16 had its meeting from 15 to 25 October 2002 in Geneva under the
Rapporteurship of Mr. Y. Naito (Mitsubishi Electric Corporation, Japan). The
objectives of the meeting were to identify the application area and ToR of
VBR codec(s) to be developed. Two Ad-hoc groups were organized to advance
the works on MSC-VBR (Multi-Rate Source Controlled Variable Bitrate)
approach and EV (Embedded VBR) approach. The preliminary ToR for MSC-VBR was
revised to Version 3.0 after the review. The first draft of ToR for EV
approach was also approved as the preliminary ToR (Version 1.0). The meeting
reconfirmed the intent to try to introduce open-collaborative way for
developing VBR speech codec(s). The details of the collaboration rules are
for further discussion. One interim meeting was planned to advance the work.
Q.10/16 (Software tools for signal processing standardization activities
and maintenance of existing voice coding standards) [WP3]
The question did not hold any Rapporteur meetings between February and
October 2002 however the work progressed by correspondence.
As regards Software Tools [ST items in the agenda] aspects of the
question, the group reviewed two minor problems reported via emails and
approved one correction and agreed to add the investigation of the other in
the action points list.
As regards the Maintenance [M items in the agenda] aspects of the
question, five delayed contributions have been submitted to Q.10 at this
meeting reporting problems in recommendations G.722.1, G.722.2, G.723.1 and
G729. Problems in the text recommendations texts of G.722 and in G728 annex
J have also been reported by emails. The group reviewed the proposed
corrections to G.722.1 main body and annex B, to G.729 Annexes B, F, G, I
and C+, and to G.723.1 annexes A and B. it was agreed to issue implementers'
guides for each of these three recommendations. The group also reviewed
proposed corrections to the texts of recommendations G.728 annex J and of
G.722 main body.
It was also proposed to work on enhancements of G.729 annex B VAD on open
Q.11/16 (Voiceband Modems: Specification and Performance Evaluation)
For this meeting the goal of Q11/16 was to complete the work on V.MoIP
(V.150.0 and V.150.1). This was achieved and both new Recommendations are
being submitted for consent. The group agreed to begin work on enhancements
to these Recommendations and to cooperate with QH/16 with their work on Text
over IP (ToIP).
Q.12/16 (DCE-DCE Protocols for the PSTN and ISDN)
Q12/16 considered a proposed change to V.42 which would improve the
operation of some modes of V.150.1. This proposal could not be agreed and no
amendment was made. It was agreed to ask the TSB to combine the corrigendum
and erratum into the body of V.44 to make a new document.
Q 13/16 (DTE-DCE Interfaces and Protocols) [WP1]
Q.13/16 met jointly with Q.11. See report above.
Q.14/16 (Facsimile terminals of Groups 3 and 4) [WP1]
Q.14/16 considered the addition of sYCC display oriented colour space to
facsimile terminals, planned for consent approval in May 2003; added two
additional MIME image sub-types to T.37 for consent approval at this
meeting; and reviewed the status of the work for addition of V.34HDX
facsimile to T.38. Interim meetings, one in joint with TIA TR30.5 are
planned to progress the work of V.34 HDX facsimile in T.38. Major future
work for Q.14 is to develop the DOCSF (display oriented colour space for
facsimile) Recommendation (T.42) and it’s related Recommendations (T.4 and
Q.15/16 (Distributed Speech Recognition and Distributed Speaker
SG16 continues to invite contributions on the subject of Digital Speech
Recognition and Digital Speaker Verification, and in particular in ITU-T
applications where SG16 can build upon the work of ETSI Project Aurora.
Recommendations Consented by SG 16 on the closing Plenary
|Consented Recommendations for AAP posting
|V.18 Amendment - Operational and interworking requirements for DCEs operating in the
text telephone mode.
|V.150.0 - Modem over IP networks – Foundation
|V.150.1 - Procedures for the end-to-end connection of V-Series DCES over an IP network.
|T.37 Amendment 3: Internet Fax via store&forward: amendment regarding usage of two MIME
content-types "image/tiff" and "image/tiff-fx"
|H.233 - Confidentiality system for audiovisual services
|H.234 - Encryption key management and authentication system for audiovisual services
|H.222.0 Amd 1 - Carriage of metadata over H.222.0|ISO/IEC 13818-1 streams
|H.225.0 Annex G - Communication between and within administrative domains
|H.323 Annex P – Real Time modem relay over H.323
|H.460.3 - Circuit Maps within H.323 Systems
|H.460.4 – Call Priority Designation for H.323 Calls
|H.460.5 - H.225.0 transport of multiple Q.931 IE of the same type
|H.460.6 - Extended Fast Connect Feature
|H.460.7 - Digit Maps within H.323 Systems
|H.460.8 - Re-Querying for Alternate Routes
|H.460.9 - Support for Real-Time QoS Monitoring
|H.245 V9 - Control protocol for multimedia communication
|H.248.11 - Media Gateway Overload Control Package
|H.248.12 Annex A - Extended H.324-, H.245 Command- and H.245 Indication Packages
|H.248.16 - Extended DTMF Detection Package
|H.248.17 - Line Test Package
|H.248.18 - Package for Support of Multiple Profiles
|H.248.20 - The use of Local and Remote Descriptors with H.221 & H.223 multiplexing
|T.803 | ISO/IEC 15444-4 - Conformance Testing
|G.722.2/Annex F - Packet format for H.245 usage
* Note: some texts are subject to editorial cleanup before posting. Hence, the version posted may differ slightly
from the TD indicated.
Recommendations Decided by SG 16 on the closing Plenary
None. F.706 received substantial modification and in accordance to WTSA 2000 Resolution 1 Section 9.5.2, the draft new
Recommendation will be considered for approval in the next SG 16 meeting on 15-25 May 2003.
Other texts approved by SG 16
|H.248.x series Implementer’s Guide
|H.323 Series (H.323, H.225.0, H.245, H.246, H.283, H.235, H.450 Series, H.460 Series and H.341)
|H-Series Supplement 2 (H.248 Sub-Series: Packages guide) Release 3
|G.722.1 (Coding at 24 and 32 kbit/s for hands-free operation in systems with low frame loss) Implementer's Guide
|G.722.2 (Wideband coding of speech at around 16 kbit/s using AMR-WB) Implementer’s Guide
|G.723.1 (Dual rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s) Implementer’s Guide
|G.729 (Coding of speech at 8 kbit/s using CS-ACELP) Implementer’s Guide
Texts deleted or proposed for deletion by SG 16
Updates in the SG 16 management team and Rapporteurs
- Mr. Mahmoud Wreikat (Jordan) as Vice-chairman of SG 16
- Mr. Federico Tosco (TI Lab) as Chairman of WP 2/16 and Vice-chairman of SG 16
- Mr. Christian Groves (Ericsson) as Rapporteur for Q.3/16
- Mr. Paul Reddy (Intel) as Rapporteur for Q.5/16
- Mr. Les Brown as Rapporteur for Q.11/16
- Chairman of WP 2/16: Mr Sakae Okubo, Japan
- Rapporteur for Question B/16: Mr Chris Hansen, Intel, USA
- Associate Rapporteur for Q.B on FS-VDSL Architecture: Mr. Stephane Py, France Telecom, France
- Associate Rapporteur for Q.C on FS-VDSL OAM&P: Mr. Peter Adams, BT, UK
- Rapporteur for Q.E/16: Mr. David Lindbergh, Polycom, USA
- Rapporteur for Q.I/16: Mr. Harold Folts, USA
- Rapporteur for Q.3/16: Mr. Terry Anderson, USA
- Rapporteur for Q.10/16 Ms. Claude Lamblin, FT, France
- Rapporteur for Q.11/16 Mr. Keith Chu, Conexant, USA
Open Rapporteurship positions:
- Q.A/16 (MediaCom 2004, allocated to WP 4)
- Q.5/16 (Mobility for Multimedia Systems and Services, allocated to WP 2)
- Q.15/16 (Distributed Speech Recognition and Distributed Speaker Verification, allocated to WP 3)
Note: Q.8/16 (Encoding of speech signals at bit rates around 4 kbit/s, allocated to WP 3) is
currently vacant, however the work has been suspended for the time being.
Note: this page is meant for information only. Please refer always to the official meeting reports for a
full and detailed review of the discussions and decisions.