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Question 10/16

Question 10/16 - Speech and audio coding and related software tools

(Continuation of Question 10/16)


The goal of this Question is to produce speech, audio and sound coding Recommendations for conversational (e.g. telephony, audio conferencing, video conferencing, video telephony and telepresence) and non-conversational (e.g. multimedia streaming, broadcast TV, IPTV, file download, media storage/playback, digital signage or digital cinema) audiovisual services. The speech and audio coding scope includes:

These Recommendations will be either new Recommendations or extensions of existing ITU T speech and audio coding Recommendations, for example using advanced techniques to significantly improve the trade-offs between bit rate, quality, delay, and algorithm complexity. This Question will also be responsible for the maintenance of the existing ITU T speech and audio coding Recommendations.

The standards developed by this Question will have sufficient flexibility to accommodate transport in a wide range of applications over a variety of transport technologies, including telephony and audio-visual services over NGN/IMS, mobile radio access networks, public and private WANs and LANs. Other applications include circuit multiplication equipment and simultaneous voice and data services.

Additionally, the Question will continue the development of the G.191 software tools library (STL). G.191 provides a common set of tools for use in ITU T standardization activities on speech and audio coding, including a library of portable, inter-workable and reliable software routines. It has been substantially improved over successive releases, and requirements for further extensions and tools have already been identified to process wider audio bandwidth signals.

Study items

Study items to be considered include, but are not limited to:


Tasks include, but are not limited to: An up-to-date status of work under this Question is found in the SG 16 work programme (