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,
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1987
- Accession Number
- ADP005604
Entities
People
- Richard L. McKinley
- Thomas J. Moore
Organizations
- Armstrong Laboratory