Noise-robust 1200-bps voice coding

Author

Rothweiler, Joseph

Author_Institution

ITT Aerosp., Nutley, NJ, USA

fYear

1992

fDate

28-30 Apr 1992

Firstpage

65

Abstract

A novel voice coding algorithm for tactical systems such as Minterm has been developed. The Soft Voicing Vocoder (SVV) algorithm meets three requirements for tactical systems: (1) low bit rate (2400 bps and below); (2) high intelligibility despite acoustic background noise; and (3) modest complexity. At 1200 bps, SVV gives higher intelligibility in noise than the standard LPC-10 2400 bps voice algorithm as defined in Fed. Std. 1015. Intelligibility improves even further when the SVV bit rate is increased to 2400 bps. The SVV is less than double the complexity of the standard 2400 bps algorithm, and can be implemented in real time on a single-chip DSP (digital signal processor) such as the TI TMS320C50. The author describes the algorithm and summarizes the performance. Finally, he shows the current implementation status and areas for further work

Keywords

digital signal processing chips; military systems; speech coding; 1200 bit/s; Minterm; Soft Voicing Vocoder; TI TMS320C50; acoustic background noise; digital signal processor; single-chip DSP; tactical systems; voice coding algorithm; Acoustic noise; Background noise; Bit rate; Digital signal processing; Frequency; Linear predictive coding; Noise robustness; Speech; Vehicles; Vocoders;

fLanguage

English

Publisher

ieee

Conference_Titel

Tactical Communications Conference, 1992. Vol. 1 Tactical Communications: Technology in Transition., Proceedings of the

Conference_Location

Fort Wayne, IN

Print_ISBN

0-7803-0745-3

Type

conf

DOI

10.1109/TCC.1992.247164

Filename

247164