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(Continuation of parts of Questions 3, 11 and 12/16)
Background and justification
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
have been developed. Following this, several enhancements with respect to
multipoint communication, use of new audio and video coding, security features
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 want to be
included in existing audiovisual communications systems Recommendations to
assure these existing systems remain competitive in the market place.
Study items
- Improvements in quality aspects; audio quality, picture quality, delay,
hypothetical reference connection and performance objectives, taking account
of the studies in relevant SGs. (NOTE - Scope of this question does not
include studies of performance measurement.)
- Enhancement by use of optional advanced audio and visual coding (e.g.
H.26L).
- Continued enhancements relative to error protection for use in
error-prone environments such as mobile networks.
- Specifications necessary for accommodating new services other than
conversational services, such as retrieval, messaging, distribution services
applicable to the supported Recommendations.
- Establishment of Recommendations to support channel aggregation in
mobile terminals (H.mml).
- Enhancement of existing H-series Recommendations.
- Possibility of new multimedia terminal system for all networks.
Specific task objectives with expected time-frame of completion
- Responsibility of this Question includes: definition of corrigenda or
revisions and creation or revision of Implementor Guides for Recommendations
H.221, H.222.0, H.222.1, H.223, H.224, H.226, H.230, H.231, H.242, H.243,
H.244, H.247, H.281, H.283, H.310, H.320, H.321, H.322, H.324,
H.331, T.120 through T.128, T.134, T.135, T.140 and related annexes and
appendices. This work will be ongoing throughout the study period.
Relationships
- Other Questions of SG 16.
- ITU-T SG 2 for service aspects and human factors.
- ITU-T SG 8 for Telematic aspects.
- ITU-T SG 12 for Quality aspects.
- ITU-R SG 8 for IMT-2000 aspects.
- ISO/IEC SG 29/WG 11 for MPEG aspects.
- IMTC.
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