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Narrowband (LPC-10) Vocoder Performance under Combined Effects of Random Bit Errors and Jet Aircraft Cabin Noise

机译：随机比特误差与喷气式飞机机舱噪声组合效应下的窄带（LpC-10）声码器性能

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Speech intelligibility and voice quality tests were conducted to evaluate the performance of the DOD standard LPC-10 narrowband vocoder algorithm under degradation caused by the combined effects of random bit errors in the data path and background noise accompanying the input speech, as occurs in the acoustic environment in the cabins of an E4B aircraft during operational flight. Vocoder intelligbility scores and voice quality scores indicated that the in-flight acoustic noise environments of the E4B Briefing Room, Battlestaff Compartment, and NCA Compartment were alike in their effects on overall vocoder performance. Composite performance data pooled for the three compartments indicated that vocoder intelligibility averaged 80.2 (fair) with no bit errors, and fell 4-1/2 points with each percent of bit errors incurred in the data path. Thus, the average intelligibility fell to 77.9 (poor) at 1/2 percent error rate, to 73.4 (very poor) at 1-1/2 percent error rate, and to 68.9 (unacceptable) at 2-1/2 percent error rate.

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作者
Smith, C. P.;
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年度 1983
页码 p.1-12
总页数 12
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Intelligibility; Speech recognition; Jet aircraft noise; Data transmission systems; Vocoders; Background noise; Scoring; Aircraft cabins; Speech articulation; Noise(Sound); Electronic aircraft; Performance(Engineering); Algorithms; Acoustics; Environments; Compartme;

机译：可懂度;语音识别;喷气式飞机噪声;数据传输系统;声码器;背景噪声;评分;飞机舱;语音清晰度;噪声（声音）;电子飞机;性能（工程）;算法;声学;环境; Compartme;

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Narrowband (LPC-10) Vocoder Performance under Combined Effects of Random Bit Errors and Jet Aircraft Cabin Noise

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