Comparison of TSVCIS voice at 8000 and 12000 bps VERSUS CVSD at 16000 bps

Author

Shahan, P. ; Heide, David A. ; Cohen, Aaron E.

Author_Institution

U.S. Naval Res. Lab., Washington, DC, USA

fYear

2012

fDate

Oct. 29 2012-Nov. 1 2012

Firstpage

1

Lastpage

4

Abstract

In this paper a novel technique for implementing heavily bit error protected 8 and 12 kilobits per second (kbps) voice coder (vocoder) based on a 2.4 kbps vocoder specified in Tactical Secure Voice Cryptographic Interoperability Specification (TSVCIS) is compared to the current 16 kbps Continuously Variable Slope Delta Modulation (CVSD) used in several legacy military radios and the Single Channel Ground and Airborne Radio System (SINCGARS). TSVCIS voice significantly outscored CVSD in terms of quality, using the Mean Opinion Score (MOS) and Diagnostic Acceptability Measure (DAM), and intelligibility, from the Diagnostic Rhyme Test (DRT). These tests show that TSVCIS voice delivers significantly higher quality and intelligibility than CVSD when transmitted over noisy communication channels.

Keywords

cryptography; military communication; radiocommunication; vocoders; CVSD; Continuously Variable Slope Delta Modulation; SINCGARS; Single Channel Ground and Airborne Radio System; TSVCIS voice; Tactical Secure Voice Cryptographic Interoperability Specification; diagnostic acceptability measure; diagnostic rhyme test; legacy military radios; mean opinion score; noisy communication channels; vocoder; voice coder; AWGN channels; Bit error rate; Fading; Forward error correction; Signal to noise ratio; Standards;

fLanguage

English

Publisher

ieee

Conference_Titel

MILITARY COMMUNICATIONS CONFERENCE, 2012 - MILCOM 2012

Conference_Location

Orlando, FL

ISSN

2155-7578

Print_ISBN

978-1-4673-1729-0

Type

conf

DOI

10.1109/MILCOM.2012.6415564

Filename

6415564