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Question 3

Speech transmission and audio characteristics of communication terminals for fixed circuit-switched, mobile and packet-switched Internet protocol (IP) networks

(Continuation of Question 3/12 - Speech transmission characteristics of communication terminals for fixed circuit-switched, mobile and packet-switched (IP) networks)

Motivation
With the wide use and fast evolution of communication terminals, the work defined in this Question remains an important area for international telecommunication standardization. On the one hand, there are numerous handsets, headsets and hands-free terminals with traditional appearance already in market or under design, terminals with new physical form and accessories that can be used with terminals providing speech communication functionality are emerging. On the other hand, more sophisticated signal processing and speech enhancement techniques are applied and widely spread in terminal design. How to evaluate these new terminals effectively is still a challenge and should be considered adequately in the future. Furthermore, the application of new test signals, such as real speech signals, are deemed to bring about huge changes on existing terminal measurement methods.

Currently most of the terminals connecting to fixed/mobile circuit-switched or packet-switched networks are still only capable of supporting narrowband or wideband speech communication. However with the development and deployment of super-wideband and fullband speech codecs, services and terminals covering the entire speech frequency range will be more widely available. The transmission characteristics and objective measurement methods for those terminals need to be considered, so as to guarantee better speech communication quality and user experience.

Speech and audio characteristics and objective measurement methods for multimedia terminals and accessories used with terminals, which are designed not purely for speech communication but keep speech communication as an important functionality, for example, videotel, audio-visual terminal, and personal wearable devices, also require further research and development.

The following Recommendations/Supplements, in force at the time of approval of this Question, fall under its responsibility:
P.300, P.310, P.311, P.313, P.341, P.342, P.350, P.370, P.381, P.382, P Suppl. 10, P Suppl. 16

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=3/12


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