(Continuation of Question 1/16) Motivation
Since the first set of Recommendations for audiovisual communication systems for
N-ISDN environments (H.320) were established in 1990, additional audiovisual
communications systems have been developed including the H.324-series of
Recommendations for audiovisual communications over the fixed and mobile
(wireless) telephone networks and the H.310-series of Recommendations for
point-to-point and multipoint on B-ISDN networks. For data sharing in point
to-point and multipoint environments, the T.120-series of Recommendations has
been developed. Following this, several enhancements with respect to multipoint
communication, use of new audio and video coding, security features, call setup
acceleration and use of data conferencing and control continue to be developed
in the form of new Recommendations or revision of existing Recommendations. To
respond to the market needs, these enhancements (with particular attention to
the support of advanced coding technologies, interworking with other terminals
accommodated in different networks and enhancements to cover other services) may
need to be included in existing audiovisual communications systems
Recommendations to assure these existing systems remain competitive in the
market place. The use of technology developed in this Question, typically audio,
video and data conferencing systems, improves communication quality and
efficiency and contributes to a reduction of greenhouse gas emission when used
as an alternative to travel.
This Question deals with extension and maintenance of this large body of
multimedia conferencing systems.
Study items
Study items to be considered include, but are not limited to:
- Improvements in quality aspects; audio quality, picture quality, delay, and
performance objectives, taking account of the studies in relevant study groups.
(NOTE – The scope of this Question does not include studies of performance
measurement.)
- Enhancements of security by use of enhanced algorithms, key management,
authentication, etc
- Enhancements to existing Recommendations by the addition of advanced audio and
visual coding (e.g. H.264 extensions and beyond)
- Enhancements to interoperability of H.300-series terminals by using common
procedures for control, indication, capability exchange mechanisms, etc (e.g.
H.239 and H.241)
- Continued enhancements relating to error resilience in error-prone
environments such as mobile networks
- Specifications of multimedia system characteristics to support
non-conversational services, such as retrieval, messaging, or distribution
services
- Enhancement of existing H-series Recommendations with respect to accessibility
- Specifications necessary to allow the use of existing terminals and achieve
interoperability with NGN
- Considerations on how to help measure and mitigate climate change
Tasks
Tasks include, but are not limited to:
- Development of new Recommendations pertaining to the study items above as
needed
- Enhancement and maintenance of H.100, H.110, H.130, H.140, H.221, H.222.0,
H.222.1, H.223, H.224, H.226, H.230, H.231, H.233, H.234, H.239, H.241, H.242,
H.243, H.244, H.247, H.281, H.282, H.283, H.310, H.320, H.321, H.322, H.324,
H.331, T.120 through T.128, T.134, T.135, T.136, T.137, T.140 and H-series
Supplement 1
An up-to-date status of work under this Question is found in the SG 16 work
programme (http://itu.int/ITU-T/workprog/wp_search.aspx?isn_sg=554).
Relationships
Recommendations:
- G.700-series, H.260-series, H.245, H.246
Questions:
- 2, 3, 6, 7, 9, 10, 12, 14, 26/16
Study Groups:
- ITU-T SG 2 for service aspects and human factors
- ITU-T SG 12 for quality aspects
- ITU-T SG 13 for future networks aspects, and NGN in particular
- ITU-R SG 5 for IMT
Other Bodies:
- ISO/IEC JTC1/SC29/WG11 for MPEG aspects
- IMTC for interoperability aspects and enhancements to existing Recommendations
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