Title :
Performance assessment of 4.8 kbit/s AMBE coding under aeronautical environmental conditions
Author :
Neto, Simão F Campos ; Corcoran, Franklin L. ; Phipps, John ; Dimolitsas, Spires
Author_Institution :
COMSAT Lab., Clarksburg, MD, USA
Abstract :
The quality delivered by low-rate parametric speech coding deployed in commercial mobile satellite systems has to be assessed by formal subjective assessment methods due to their non-linear nature. Aeronautical systems, especially those for deployment in small aircraft, pose yet more stringent conditions due to high environmental noise levels. In this paper the results of an evaluation of the voice quality of DVSI´s 4.8 kbit/s Advanced Multi-Band Excited (AMBE) coding under aeronautical channel conditions are presented for listening and conversational experiments. From these assessments it was concluded that that the voice quality of the Inmarsat Aeronautical system will be perceptibly improved when the current full-rate codec is replaced by the AMBE codec
Keywords :
aircraft communication; mobile satellite communication; speech codecs; 4.8 kbit/s; 4.8 kbit/s AMBE coding; AMBE codec; Advanced Multi-Band Excited codec; DVSI; Inmarsat Aeronautical system; aeronautical environmental conditions; conversational experiments; environmental noise levels; listening experiments; low-rate parametric speech coding; performance assessment; small aircraft; voice quality; Aircraft; Artificial satellites; Integrated circuit interconnections; LAN interconnection; Laboratories; Signal processing; Speech codecs; Speech coding; System testing; Working environment noise;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.541142
