Speech quality assessment is indispensable to properly design a speech enhancement algorithm. The perceptual evaluation of speech quality (PESQ) is frequently employed as an objective speech distortion measure. The PESQ is a methodology for estimating subjective assessment of speech quality assuming a slight distortion caused by speech codecs for telephony systems. In case of noise reduction, however, a degree of speech distortion is heavier than those caused by the speech codecs. In this paper applicability of the PESQ is investigated for noisy and noise-reduced speech signals under severe noisy conditions. A relationship between PESQ scores and subjective mean opinion scores reveals that the PESQ can be applicable for heavily distorted speech only under non-stationary noisy conditions.
Author:
Mizumachi, Mitsunori
Affiliation:
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
AES Convention:
137 (October 2014)
Paper Number:
9171
Publication Date:
October 8, 2014
Subject:
Applications in Audio
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