Title :
Evaluation of voice codec performance for the Inmarsat mini-M system
Author :
Dimolitsas, S. ; Corcoran, F.L. ; Ravishankar, C. ; Wong, A. ; de Campos Neto, S.F. ; Skaland, R.S.
Author_Institution :
COMSAT Lab., Clarksburg, MD, USA
Abstract :
In this paper the method and results of a subjective evaluation are presented which was conducted in order to select a new speech codec for the Inmarsat mini-M system. The mini-M system is designed to provide the next generation of global, notebook-sized satellite terminals for transportable, land-mobile and maritime voice, facsimile, and data communications. Overall, six different codecs operating at a combined source and channel rate of 4.8 kbit/s were evaluated in a series of six subjective tests. From this, it was concluded that one codec was able to deliver performance that is equivalent to, or better than, the IS-54 full-rate digital cellular 8 kbit/s VSELP codec, and was selected for use in the mini-M system
Keywords :
cellular radio; data communication equipment; facsimile equipment; land mobile radio; marine systems; mobile satellite communication; satellite ground stations; speech codecs; telecommunication equipment testing; voice communication; 4.8 kbit/s; 8 kbit/s; IS-54 full-rate digital cellular codec; Inmarsat mini-M system; VSELP codec; channel rate; data communications; facsimile; land-mobile communications; maritime voice communication; notebook-sized satellite terminals; performance evaluation; source rate; subjective evaluation; subjective tests; transportable communication; voice codec performance;
Conference_Titel :
Digital Satellite Communications, 1995., Tenth International Conference on
Conference_Location :
Brighton
Print_ISBN :
0-85296-635-0
DOI :
10.1049/cp:19950015
