Vocoder intelligibility and quality test methods

Vocoder intelligibility and quality test methods

The U.S. Department of Defense's Digital Voice Processing Consortium (DDVPC) is in the process of choosing a new 2400 bps vocoder standard. As part of the selection process, a study was conducted to determine the test measures to be used for the evaluation of the intelligibility and quality of...

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Hauptverfasser: Tardelli, J.D., Kreamer, E.W.
Format: Tagungsbericht
Sprache:eng
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Acoustic materials
Acoustic measurements
Acoustic noise
Acoustic testing
Costs
Couplings
Degradation
Libraries
Materials testing
Vocoders
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creator Tardelli, J.D.
Kreamer, E.W.
description The U.S. Department of Defense's Digital Voice Processing Consortium (DDVPC) is in the process of choosing a new 2400 bps vocoder standard. As part of the selection process, a study was conducted to determine the test measures to be used for the evaluation of the intelligibility and quality of competing vocoder algorithms. The DDVPC requirements for a vocoder differ substantially from commercial interests. Severe ambient acoustic noise backgrounds coupled with hostile transmission channel conditions must be considered. The commercially popular mean opinion score (MOS) test method was evaluated as a replacement or companion test of quality to the diagnostic acceptability measure (DAM), traditionally used by the DDVPC. The study showed that a properly structured MOS test can achieve equal resolution, reliability, and validity to that of the DAM at equivalent costs. Any MOS test series must be structured to minimize contextual effects. Certain severe conditions must use the degraded mean opinion score (DMOS) test method to achieve usable resolution.
doi_str_mv 10.1109/ICASSP.1996.543567
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identifier ISSN: 1520-6149
ispartof 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings, 1996, Vol.2, p.1145-1148 vol. 2
issn 1520-6149
2379-190X
language eng
recordid cdi_ieee_primary_543567
source IEEE Electronic Library (IEL) Conference Proceedings
subjects Acoustic materials
Acoustic measurements
Acoustic noise
Acoustic testing
Costs
Couplings
Degradation
Libraries
Materials testing
Vocoders
title Vocoder intelligibility and quality test methods
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