Publications – Details
Subjective Performance Evaluation of the GSM Half-Rate Coding Algorithm
- Authors:
- Paolino Usai, Dominique Pascal, Graham Cosier, Jochem Sotscheck, and Michael Kappelan
- Book Title:
- Proceedings of IEEE International Conference on Communications (ICC)
- Venue:
- Seattle, USA
- Date:
- June 1995
- Pages:
- 65–71
- Language:
- English
Abstract
The Pan-European cellular digital mobile radio system GSM uses a codec with a net bit rate of 13.0 kbit/s(gross bit rate including error protection 22.8 kbit/s), known as the “full rate” RPE-LTP (regular pulse excitation with long term prediction). GSM is now ready to dub channel capacity with the adoption of a new algorithm as an ETSI Recommendation, the candidate codec being called appropriately “half-rate” (gross bit rate 11.4 kbit/s). Internationally coordinated series of subjective listening experiments were planned and carried out during the exercise. Four main phases were necessary, called qualification, selection(s), optimisation and characterisation. The paper describes the tests performed and gives an outline of the performance of the codec with voice signals under realistic network conditions. The effects on the speech performance produced by the voice activity detector and related DTX system are not the main subject of the paper but information on this topic is given.
Download of Publication
Copyright Notice
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
The following notice applies to all IEEE publications:
© IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.