Measurement of the effects of temporal clipping on speech quality

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 p...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2006-08, Vol.55 (4), p.1197-1203
Main Authors: Lijing Ding, Radwan, A., El-Hennawey, M.S., Goubran, R.A.
Format: Article
Language:English
Subjects:
Algorithms
Bandwidth
Clipping
Distortion measurement
Echo cancellers
Internet telephony
IP (Internet Protocol)
Mean opinion score (MOS)
Metal oxide semiconductors
Noise
Noise cancellation
nonintrusive method
Nonlinear distortion
quality of experience (QoE)
Speech
Speech analysis
Speech codecs
Speech enhancement
speech quality
temporal clipping
Temporal logic
Testing
Voice
voice activity detection (VAD)
voice over Internet protocol (VoIP)
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Summary: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)
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2006.876538