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ITU-T Study Group 16 (Study Period 2005-2008) |
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Executive Summary of the Meeting |
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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)
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 |
| |
|
|
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
None.
Updates in the SG 16 management team and Rapporteurs
(Click here for the complete list of SG 16 Rapporteurs)
Resignations:
- Mr Istvan Sebestyen, Vice-chairman SG 16 and Chair of WP 2/16
- Rapporteur for Q17/16 (Mr T�nu 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-Andr� 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)
- 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.
- 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.
- 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
- 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.
- 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)
- Relationships
Recommendations:
- 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
Questions:
- 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)
- 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.).
- 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.
- 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 200
89-2010 (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.
- Relationships
Recommendations:
- H.300-series Systems Recommendations;
- H.222.0;
- H.241;
- H.245;
- H.248;
- T.80-series, T.800-series.
Questions:
- 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;
- IETF, DVB, ATSC, ARIB, 3GPP, 3GPP-2, SMPTE, IMTC, OMA, W3C
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