Publications – Details
Evaluation of AMR-NB and AMR-WB in Packet Switched Conversational Communications
- Authors:
- Hervé Taddei, Imre Varga, Laetitia Gros, Catherine Quinquis, Jean Yves Monfort, Frank Mertz, and Thorsten Clevorn
- Book Title:
- Proceedings of IEEE International Conference on Multimedia and Expo (ICME)
- Volume:
- 3
- Venue:
- Taipei, Taiwan
- Date:
- June 2004
- Pages:
- 2003–2006
- Language:
- English
Abstract
The introduction of packet switched (PS) networks (e.g., IMS) creates a need to evaluate speech transmission quality when using the 3GPP default speech codecs. 3GPP SA4 has created a work item in 3GPP Release 6 on "Performance characterization of default codecs for PS conversational application". France Telecom R&D and Siemens proposed a test framework consisting of a UMTS simulator for the air interface and an IP network simulator. ITU-T recommendation P.800 (1996) is used for the quality estimation of the transmission. The real-time conversational test results show that the AMR-NB (adaptive multirate narrow band) and AMR-WB (AMR wide band) speech codecs are well suited for PS conversational applications. Furthermore, the results clearly show a higher understanding when using AMR-WB rather than AMR-NB.
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