LS/O - Availability of the Open Source ITU-T Software Tool Library (STL)

INTERNATIONAL TELECOMMUNICATION UNION TD 202 TELECOMMUNICATION TSAG STANDARDIZATION SECTOR STUDY PERIOD 2017-2020 Original: English Question(s): N/A Geneva, 26 February - 2 March 2018 TD (Ref.: SG12 - LS 16 -E) Source: ITU-T Study Group 12 Title: LS on Availability of the open source ITU-T Software Tool Library (STL) [from ITU-T SG12]

Purpose: Information

LIAISON STATEMENT For action to: - For comment to: - For information to: ETSI TC STQ, 3GPP TSG SA4, QUALINET - COST ACTION IC1003, SG16, TSAG Approval: SG12 meeting (Geneva, 28 September 2017) Deadline: - Contact: Ludovic Malfait Tel: +1 408 306 6987 Dolby Laboratories E-mail: [email protected] USA

A new liaison statement has been received from SG12. This liaison statement follows and the original file can be downloaded from the ITU ftp server at http://handle.itu.int/11.1002/ls/sp16-sg12-oLS-00016.docx. - 2 - TD 202

INTERNATIONAL TELECOMMUNICATION UNION SG12-LS16 TELECOMMUNICATION STANDARDIZATION SECTOR Study Group 12 STUDY PERIOD 2017-2020 Original: English Question(s): 2/12 Geneva, 19-28 September 2017 Ref.: SG12-TD337-R1 Source: ITU-T Study Group 12 Title: LS - Availability of the open source ITU-T Software Tool Library (STL) Purpose: Approval LIAISON STATEMENT For action to: For comment to: For information to: ETSI TC STQ, 3GPP SA4, QUALINET, ITU-T SG16, ITU-T TSAG Approval: SG12 meeting (Geneva, 28 September 2017) Deadline: - Contact: Ludovic Malfait Tel: +1 408 306 6987 Dolby Laboratories E-mail: [email protected] USA

Keywords: ITU-T G.191; Software Tool Library; open-source; GitHub Abstract: This document announces the availability of the open-source repository for Rec. ITU-T G.191: https://github.com/openitu/STL

The Software Tool Library (STL) is a collection of tools for speech processing approved by the ITU, of which the first release was approved in 1992. The collection evolved over the years and it now provides source code for a large set of software tools which includes codecs (G.711, G.726, G.727, G.728, G.722, REP-LTP), filters (IRS, Psophometric, P.341, MUSHRA anchors, etc…), bitstream errors generator, active speech level meter, and more. The STL is currently designed for speech and it is anticipated that it will extend to image and video processing. Study Group 12 is now responsible for the maintenance of Recommendations ITU-T G.191 and G.192, and the group decided to make the STL available as an open source project on GitHub for allowing people external to the ITU-T to contribute to the development of the library. The open-source STL portal is now available on GitHub (https://github.com/openitu/STL) and provides a mission statement, target audience and a general description of the processes for STL development and future revisions of Rec. ITU-T G.191. The STL GitHub repository is structured as three main branches:  The master branch holds the latest approved version of Recommendation ITU-T G.191, currently STL2009; - 3 - TD 202

 The development (dev) branch is the open-source community section that holds the code developed in the open-source environment;  The submission branch will be created and used for the submission to ITU-T of new stable code for standardization Work towards the development of the next STL release has already started with the refactoring of make files and test vectors verification, the conversion of readme files to Markdown, and the listing of know issues and desirable improvements in GitHub issue tracker. We would like to invite all enthusiasts and experts to join the effort of improving existing code or proposing new modules for the STL in the new open-source environment. More information about the open source efforts related to the Software Tool Library can be found at http://news.itu.int/open-source-speech-coding-tools/. ______