A spectro-temporal modulation index (STMI) for assessment of speech intelligibility
A spectro-temporal modulation index (STMI) for assessment of speech intelligibility
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DOI：
10.1016/s0167-6393(02)00134-6
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发表时间：
2003-10-01
影响因子：
3.2
通讯作者：
Shamma, SA
中科院分区：
文献类型：
--
作者：
Elhilali, M;Chi, T;Shamma, SA
我们提出了一种生物激励的方法来评估在各种类型的失真下记录或传输的语音的可理解性。该方法使用听觉模型来分析噪声、混响和其他失真对语音中存在的联合频谱-时间调制的影响，以及对信道传输这些调制的能力的影响。通过频谱-时间调制指数(STMI)来总结这些影响。该指数通过将其预测与经典STI的预测以及人类受试者收听被混合噪声和混响污染的语音报告的错误率进行比较来验证。我们进一步证明，STMI能够处理复杂的、非线性的失真，如相位抖动和漂移，而STI对这些失真不敏感。(C)2002年，爱思唯尔出版。
We present a biologically motivated method for assessing the intelligibility of speech recorded or transmitted under various types of distortions. The method employs an auditory model to analyze the effects of noise, reverberations, and other distortions on the joint spectro-temporal modulations present in speech, and on the ability of a channel to transmit these modulations. The effects are summarized by a spectro-temporal modulation index (STMI). The index is validated by comparing its predictions to those of the classical STI and to error rates reported by human subjects listening to speech contaminated with combined noise and reverberation. We further demonstrate that the STMI can handle difficult and nonlinear distortions such as phase-jitter and shifts, to which the STI is not sensitive. (C) 2002 Published by Elsevier B.V.