Effect of Audio Bandwidth and Bit Error Rate on PCM (Pulse Code Modulation), ADPCM (Adaptive Differential Pulse Code Modulation, and LPC (Linear Predictive Coding) Speech Coding Algorithm Intelligibility,

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Abstract:

This paper describes and quantifies the effects of audio bandwidth and bit error rate on speech intelligibility of voice coders in noise. The research was conducted within the Biological Acoustics Branch of the United States Air Force, Harry G. Armstrong Aerospace Medical Research Laboratory. Three different speech coding techniques were investigated, pulse code modulation PCM, adaptive differential pulse code modulation ADPCM and linear predictive coding LPC. Speech intelligibility was measured in realistic acoustic noise environs by a panel of 10 subjects performing the Modified Rhyme Test MRT. Summary data is presented along with planned future research in optimization of audio bandwidth vs bit error rate tradeoff for best speech intelligibility. Author

Author(s):
Mckinley, Richard L. ; Moore, Thomas J.
Author Organization(s):
HARRY G ARMSTRONG AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OH
Supplementary Note:
This article is from 'Information Management and Decision Making in Advanced Airborne Weapon Systems: Conference Proceedings of the Aerospace Medical Panel Symposium Held in Toronto, Canada on 15-18 April 1986,' AD-A184 044, p30-1-30-7.
Pagination:
0007

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Subject Terms
Joint Capability Areas:
JCA_6.1_Information Transport; JCA_6_Net Centric
Communities of Interest:
Biomedical
Descriptor(s):
*CODERS, *BANDWIDTH, VOICE COMMUNICATIONS, DIFFERENTIAL PULSE CODE MODULATION, PULSE CODE MODULATION, MILITARY OPERATIONS, INTELLIGIBILITY
Field(s)/Group(s):
Voice Communications
Keyword(s):
*Speech coding, Linear predictive coding, NATO furnished, Component Reports
Report Date:
1987 Feb 01