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Question 10

Conferencing and telemeeting assessment

(Continuation of Question 10/12 - Conferencing and telemeeting assessment)

Motivation
In today's society, audio and audio-visual telemeetings and audio- and video-conferences are gaining in importance. The term telemeeting is used here to cover with one term all means of audio or audio-visual communication between distant locations. The term also emphasizes that a telemeeting is considered to be more flexible and interactive than a traditional business audio- or video-conference. Telemeetings are more and more common also in private usage scenarios, e.g. when families communicate over large distances.

If the perceived quality is good enough, such telemeetings can be used as a complement to face-to-face meetings, and travel time and cost can be reduced. There is a need to develop an agreed way of quantifying the quality of experience of multi-party services that are conversational and interactive.

Telephony has traditionally been a point-to-point service, but a telemeeting is often a multipoint communication, where the participants can use different types of equipment to connect to the (virtual or real) meeting space, e.g. by fixed phone, mobile phone, PC, videoconferencing or telepresence equipment. To obtain a good evaluation of the telemeeting quality of experience, the quality perceived by all participants in a telemeeting needs to be assessed.

There are standardized subjective and objective test methods for several components in a telemeeting, such as speech, audio and video codecs, characterized by bit rate (fixed or variable), frame rate, resolution, noise cancellation, background noise, and synchronization and transmission impairments. Some recommendations on how to assess the interaction between these factors are available, too. In a telemeeting context, however, these factors need to be assessed in the light of multiple users connected via possibly asymmetric links. The main focus from the start has been on subjective assessment strategies. The results from performed tests can then form a base for objective quality assessment of telemeetings and can provide insights on quality aspects for telemeeting services. So the scope of Q10 includes multimedia subjective assessment, objective modelling as well as QoE.

The following Recommendations/Supplements, in force at the time of approval of this Question, fall under its responsibility:
P.1301, P.1302, P.1305, P.1311, P.1312, P Suppl. 26

Question
Study items to be considered include, but are not limited to:
Tasks
Tasks include, but are not limited to:
An up-to-date status of work under this Question is contained in the SG12 work programme
http://www.itu.int/ITU-T/workprog/wp_search.aspx?q=10/12 

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