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ITU-T Study Group 16 (Study Period 2005-2008) |
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Question 23/16 - Media coding |
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(Continuation of Question E/16 and parts of Questions 7, 8 and 15/16)
- Motivation
Media coding is a key element of multimedia communications and encompasses several areas for study:
- still-image coding,
- character coding,
- graphic coding,
- computer data compression,
- moving image coding,
- audio coding (20-20 000 Hz),
- wideband coding (50-7 000 Hz),
- narrow-band (or telephony band) coding (200-3 400 Hz),
- parameter extraction from audio, video and still-image signals.
This Question will address the media coding topics that affect conversational and non conversational applications, such as conventional and IP telephony, audiovisual multimedia communications, that have not been addressed by other media coding Questions in ITU-T. This Question will also address the need to define extensions to existing ITU-T media coding Recommendations for use in conversational and non-conversational services and systems.
- Study Items
- Definition and extension of Recommendations when the work cannot be meaningfully addressed in current ITU-T media coding Questions including:
- coding of moving image;
- audio coding;
- wideband and narrow-band signal coding, including scalability issues, pre- and post processing functions, including discontinuous transmission and comfort noise generation algorithms, noise suppression techniques, packet loss concealment methods;
- embedded and layered coding of speech, in particular for packet-based (including IP) and wireless applications;
- computer data compression;
- parameter extraction from audio, video and still-image signals in support of applications such as speech recognition, speaker verification, biometrics applications, etc.
- Harmonization of media coding activities with other standard development organizations (SDOs).
- Packetization definition issues.
- Security aspects that directly affect media coding including watermarking techniques.
- Tasks
Tasks include, but are not limited to:
- Dealing with the study items as contributions are made available to determine whether:
- the work should be allocated to an existing Question; or
- for studies that require a short-term effort, an ad hoc group should be created with a specific mandate; or
- for studies that require a medium- or long-term effort, to propose to the study group the establishment of a new Question or the revision of an existing one.
- Support the Study Group in the implementation of ITU-T IPR polices on media coding topics.
- 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, and T.870.
An up-to-date status of work under this Question is contained in the
SG 16 Work Programme.
- Relationships
Recommendations:
- H.320-series Systems Recommendations
- Video Signalling Recommendation H.241
- Audio and Speech Coding Recommendations of the G.700-series
- Video Coding Recommendations of the H.260-series
Questions:
- Other relevant Study Group 16 Questions including 22(C), 24(F), 25(G), 26(H), 28(J), 1, 2, 3, 4, 6, 9, 10 and 14
Study Groups:
- ITU-T SG 9 on media coding aspects of digital cable systems;
- ITU-T SG 19 and ITU-R SG 8 on IMT-2000 and beyond issues;
- ITU-T Study Group 12 on end-to-end performance and media quality issues;
- ITU-T Study Group 13 on IP, ATM, ISDN and general network issues;
- ITU-T Study Group 15 on network signal processing issues, including echo cancellers and circuit multiplication equipment;
- ITU-R SG 6 on terrestrial and satellite broadcasting services.
Other bodies:
- 3GPP, 3GPP-2 and OMA for wireless applications;
- IETF for media packetization issues;
- IMTC Media Coding AG and Requirements WG for input regarding market requirements;
- ETSI Aurora and TISPAN;
- ISO/IEC JTC 1/SC 29 (MPEG, JPEG) for still- and motion image and audio coding;
- ISO/IEC JTC 1/SC 2 for character coding;
- W3C for HTML.
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