20-11-2012, 11:41 AM
Multimedia Services from Narrowband to Broadband
[attachment=40293]
ITU-T Study Group 16
Responsible for studies relating to:
multimedia service definition and multimedia systems, including the associated terminals, modems, protocols and signal processing.
Lead Study Group on
Multimedia Services, Systems and Terminals
e-business and e-commerce
ITU-T Study Group 16 WPs (1)
Working Party 1/16 - Modems and facsimile terminals
H/16 Accessibility to Multimedia Systems and Services
11/16 Voiceband Modems: Specification and Performance Evaluation
12/16 DCE-DCE protocols for the PSTN and ISDN
13/16 DTE-DCE Interfaces and Protocols
14/16 Facsimile terminals
Working Party 2/16 - Multimedia platform and interworking
D/16 Interoperability of Multimedia Systems and Services
F/16 Quality of Service (QoS) and End-to-End Performance in Multimedia Systems
G/16 Security of Multimedia Systems and Services
1/16 Multimedia Systems, Terminals and Data Conferencing
2/16 Multimedia over Packet Networks using H.323 Systems
3/16 Infrastructure and Interoperability for Multimedia over Packet Network Systems
4/16 Video and data conferencing using Internet supported services
5/16 Mobility for Multimedia Systems and Services
Services in the Multimedia Context
Two paradigms
Telecommunications perspective
Broadcasting perspective
Telecoms perspective:
Interactive applications, videoconferencing
Broadcasting:
Video delivery (e.g. commercial television)
Convergence: IT / Telecoms / Broadcasting
Interactive broadcasting
Telecom service providers providing entertainment services
Users view versus technologists view
Where to? Multimedia services
Superset of monomedia services
Coordinated delivery of more than one media:
Audiovisual content (fallback to audio-only)
Audiovisual plus whiteboard
Delivery of video services
Duo / triple play: voice / data / video
Capabilities limited by access capacity BUT not all applications need all bandwidth available
Taxonomy of media will help understand viability of different types of aggregation to implement a service
Evolution: multimedia over narrowband channels to broadband channels
MM Service Descriptions
Definition of several MM tasks:
Conferencing (multipoint, bi-directional, real-time)
Conversation (point-to-point, bi-directional, real-time)
Distribution (point-to-multipoint, unidirectional)
Sending (point-to-point distribution, Tx controlled, UD; info pushing)
Receiving (point-to-point distribution, Rx controlled, UD; info retrieval)
Collecting (multipoint-to-point distrib., UD, Rx controlled; info polling)
Media components: audio, video, text, graphics, data and still-pictures
Quality level for media components: {-1, 0, 1, 2, 3, 4}
Data
T.120-T.140,T.17x provide definitions for data exchange and control in MM conferencing applications. For example:
T.120 defines data protocols for multipoint multimedia conferencing (Annex C describes a light version of T.120). E.g. White-board applications.
T.140 adds text conversation (“chat” e.g. for hearing-impaired people)
T.17x: MHEG for information retrieval
Media Coding: Still Image
Still image (B/W & color) is used in facsimile services, in Internet applications, digital photography, etc.
Standards work performed by a “Collaborative ITU|ISO/IEC Team” working under ISO/IEC SC29 rules and organization
ITU has “common-text” for JPEG/JBIG (T.80 series); soon-to-be JPEG2000 (T.800 series)
[attachment=40293]
ITU-T Study Group 16
Responsible for studies relating to:
multimedia service definition and multimedia systems, including the associated terminals, modems, protocols and signal processing.
Lead Study Group on
Multimedia Services, Systems and Terminals
e-business and e-commerce
ITU-T Study Group 16 WPs (1)
Working Party 1/16 - Modems and facsimile terminals
H/16 Accessibility to Multimedia Systems and Services
11/16 Voiceband Modems: Specification and Performance Evaluation
12/16 DCE-DCE protocols for the PSTN and ISDN
13/16 DTE-DCE Interfaces and Protocols
14/16 Facsimile terminals
Working Party 2/16 - Multimedia platform and interworking
D/16 Interoperability of Multimedia Systems and Services
F/16 Quality of Service (QoS) and End-to-End Performance in Multimedia Systems
G/16 Security of Multimedia Systems and Services
1/16 Multimedia Systems, Terminals and Data Conferencing
2/16 Multimedia over Packet Networks using H.323 Systems
3/16 Infrastructure and Interoperability for Multimedia over Packet Network Systems
4/16 Video and data conferencing using Internet supported services
5/16 Mobility for Multimedia Systems and Services
Services in the Multimedia Context
Two paradigms
Telecommunications perspective
Broadcasting perspective
Telecoms perspective:
Interactive applications, videoconferencing
Broadcasting:
Video delivery (e.g. commercial television)
Convergence: IT / Telecoms / Broadcasting
Interactive broadcasting
Telecom service providers providing entertainment services
Users view versus technologists view
Where to? Multimedia services
Superset of monomedia services
Coordinated delivery of more than one media:
Audiovisual content (fallback to audio-only)
Audiovisual plus whiteboard
Delivery of video services
Duo / triple play: voice / data / video
Capabilities limited by access capacity BUT not all applications need all bandwidth available
Taxonomy of media will help understand viability of different types of aggregation to implement a service
Evolution: multimedia over narrowband channels to broadband channels
MM Service Descriptions
Definition of several MM tasks:
Conferencing (multipoint, bi-directional, real-time)
Conversation (point-to-point, bi-directional, real-time)
Distribution (point-to-multipoint, unidirectional)
Sending (point-to-point distribution, Tx controlled, UD; info pushing)
Receiving (point-to-point distribution, Rx controlled, UD; info retrieval)
Collecting (multipoint-to-point distrib., UD, Rx controlled; info polling)
Media components: audio, video, text, graphics, data and still-pictures
Quality level for media components: {-1, 0, 1, 2, 3, 4}
Data
T.120-T.140,T.17x provide definitions for data exchange and control in MM conferencing applications. For example:
T.120 defines data protocols for multipoint multimedia conferencing (Annex C describes a light version of T.120). E.g. White-board applications.
T.140 adds text conversation (“chat” e.g. for hearing-impaired people)
T.17x: MHEG for information retrieval
Media Coding: Still Image
Still image (B/W & color) is used in facsimile services, in Internet applications, digital photography, etc.
Standards work performed by a “Collaborative ITU|ISO/IEC Team” working under ISO/IEC SC29 rules and organization
ITU has “common-text” for JPEG/JBIG (T.80 series); soon-to-be JPEG2000 (T.800 series)