Measurement of the effects of temporal clipping on speech quality

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Date

2006

Journal Title

Journal ISSN

Volume Title

Type

Article

Publisher

IEEE

Series Info

IEEE Transactions on Instrumentation and Measurement;Volume: 55 , Issue: 4 , Aug. 2006, Page(s): 1197 - 1203

Doi

Abstract

This paper investigates the effects of temporal clipping on perceived speech quality. Temporal clipping usually results from voice activity detection (VAD), or line echo canceller's nonlinear processor, and the clipped speech portions are replaced by comfort noise. A nonintrusive algorithm is proposed to predict speech quality based on the clipping statistics. Mean opinion score (MOS) is used as a metric for speech quality and is measured by perceptual evaluation of speech quality (PESQ). The impacts of speech frame size and noise spectrum on the algorithm are also investigated. The results show that the proposed algorithm can efficiently predict the speech quality. The correlation coefficient between the prediction and the measurement is about 0.975, and the root mean square error for the prediction is 0.20 MOS. The algorithm can be used as an integral part of a general speech quality assessment scheme in voice over Internet protocol (VoIP)

Description

MSA Google Scholar

Keywords

Internet telephony, Speech enhancement, Noise cancellation, Speech analysis, Speech codecs, Bandwidth, Echo cancellers, Nonlinear distortion, Distortion measurement, Testing

Citation

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