Objective Speech Intelligibility Measurement on the Basis of Natural Speech in Combination with Perceptual Modeling
Because the subjective evaluation of speech intelligibility in degraded communications systems is very time consuming, an objective measure would be a valuable tool. This paper shows that a simple extension of ITU-T Recommendation P.862 achieves at least a 0.8 correlation between subjective and objective intelligibility scores. Additional enhancements raised the correlation to around 0.9. Tests used CVC words embedded in a carrier sentence in the subjective test and a concatenated CVC string in the objective PESQ measurements.
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