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 ITU-T Workshop on “Interactions of Voiceband Signal Processing Functions and their End-to-End Coordination”
 Germantown, Maryland, USA, 21 April 2010 Contact: 
This one-day workshop will take place at Texas Instruments, Germantown, Maryland, USA, on 21 April 2010 after the period of the joint Q15, Q16 and Q18 experts meetings from 14 – 20 April 2010 (see of ITU-T Study Group 16 which is the lead Study Group on Signal Processing Functions. Delegates to the Workshop are welcome to attend but must indicate their intention to do so on the registration form.
The event aims to bring together people with experience in the research, development, standardization and network/terminal operation of Voice Band Signal Processing Functions (SPF) such as echo cancellers (EC), noise reduction, automatic listener enhancement (ALE)/automatic level control (ALC), voice coding (including silence elimination and voice activity detection) and dynamic coordination and control of signal processing functions. Dynamic coordination and control of SPF is intended to minimize undesirable interaction of voice processing functions present on bearer paths of a communication link, for the purpose of improving overall end-to-end voice quality. The signal processing functions for coordination could be located in Global Switched Telephone Network (GSTN), IP network and Next Generation Networks (NGN) including mobile or vehicle terminal devices.
The event will discuss:
  • applications and services including aspects of voice quality evaluations based on various SPF in the network (contributions are particularly encouraged on the topics of technology, research, recent developments, quality aspects, etc.)
  • the role of SPF in terminals, networks, end to end coordination and the implementation aspects
  • interaction with equipment attached to the terminals such as headsets, hands-free terminals, and Bluetooth based devices
  • mobile networks, and their interaction with other networks
  • current status and content of the standards with regard to SPF and dynamic coordination and control of SPF
  • dynamic coordination and control of signal processing functions and their implementation aspects in GSTN, IP network and NGN including Mobile Networks
  • the existing and in-progress standards and the identification of the need for filling the gaps
  • the follow-up actions required for the application areas and implementation aspects
  • tandeming of speech codecs and its impact on speech quality
  • tandeming of ECs and its impact on speech quality
  • tandeming of ALE/ALC and its impact on speech quality
  • the expected and unexpected interactions that may appear by tandeming various SPF. (ex. EC with centerclipper, ALC, ALE, and Silence Elimination)
  • controls to avoid tandeming issues
  • suggestions and recommendations necessary to avoid tandeming SPF(for example: to facilitate G.799.2 (ex. G.MDCSPNE) effectively)
  • the types of interactions expected if distributed speech recognition is introduced
  • testing and/or evaluating end-to-end SPF coordination
  • the coordination criteria and the rules required especially when multiple SPF are combined
  • the interaction of voiceband data modem transmission with SPF in the network and its avoidance and other additional subjects

Please take a few minutes to respond to the following survey, which is designed to assess your satisfaction with this event. Information that you provide will be treated confidentially (only overall ratings will be published). Thank you for your time.

Information and Documentation
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General Information   Contact point for contributions to the event  Related Topics, Study Groups, Organizations


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Updated : 2010-08-16