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

Volume

1

fYear

1996

fDate

7-10 May 1996

Firstpage

499

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on

Conference_Location

Atlanta, GA

ISSN

1520-6149

Print_ISBN

0-7803-3192-3

Type

conf

DOI

10.1109/ICASSP.1996.541142

Filename

541142