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ITU-T Study Group 12 - List of Questions Under Study (Study Period 2001 - 2004)

Study Group 12 - End-to-end transmission performance of networks and terminals

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Question number Title Status
1/12 Evolution of the work programme Continuation of Q.1/12
2/12 Speech Transmission Characteristics and Measurement methods for Terminals and Gateways interfacing Packet-Switched (IP) Networks Continuation of part of Q.9/12
3/12 Transmission characteristics of speech terminals both for fixed circuit-switched and mobile networks Continuation of part of Q.9/12 and Q.12/12
4/12 Telephonometric methodologies for hands-free terminals and speech enhancement devices (including AEC and Noise Reduction) Continuation of Q.6/12
5/12 Telephonometric methodologies for handset and headset terminals Continuation of Q.8/12
6/12 Analysis methods using complex measurement signals Continuation of Q.7/12
7/12 Methods, tools and test plans for the subjective assessment of speech and audio quality Continuation of Qs. 14 and 22/12
8/12 Extension of the E-Model Continuation of Q.20/12
9/12 Objective measurement of speech quality under conditions of non-linear and time-variant processing Continuation of Q.13/12
10/12 Transmission planning for voiceband, data and multimedia services Continuation of Qs.16 and 17/12
11/12 Speech transmission planning for multiple interconnected networks (e.g. public, private, Internet)  Continuation of Q.18/12
12/12 Transmission performance considerations for voiceband services carried on networks that use Internet Protocol (IP) Continuation of Q.23/12
13/12 Multimedia QoS/performance requirements New
14/12 Effects of interworking between multiple IP domains on the transmission performance of VoIP and voiceband services New
15/12 QoS and performance coordination New
16/12 In-service non-intrusive assessment of voice transmission performance New


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