Vowel reduction as information loss
Vowel reduction as information loss
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元音减少导致信息丢失
作者：
John Harris
元音减少抑制了语音信号中的语音信息，应该理解为对语音表示具有类似的影响。在元音空间中，缩写遵循两条明显相互矛盾的路线，要么产生中心值(向心型)，要么产生角值a，i，u(离心型)。这些元音的统一之处在于，它们的声谱比中周边元音的声谱相对简单。频谱复杂性可以作为在给定时间出现在语音信号中的语音信息量的一种度量。在此基础上，向心性还原和离心性还原都可以解释为语音信息的损失。在选择性地瞄准不突出的位置时，缩写具有增强元音之间的组合对比的效果。用a、i和u这三个基本成分来表示元音，可以将这种信息不对称直接记录在语音语法中。
Vowel reduction suppresses phonetic information in the speech signal and should be understood as having an analogous impact on phonological representations. Reduction follows two apparently contradictory routes in vowel space, yielding either centralised values (the ‘centripetal’ pattern) or the corner values a, i, u (the ‘centrifugal’ pattern). What unifies these vowels is the relative simplicity of their acoustic spectra compared to those of mid peripheral vowels. Spectral complexity can be taken as one measure of the amount of phonetic information present in a speech signal at a given time. On this basis, centripetal and centrifugal reduction can both be construed as resulting in a loss of phonetic information. In selectively targeting non-prominent positions, reduction has the effect of enhancing syntagmatic contrasts among vowels. Representing vowels in terms of three basic components manifested as a, i and u allows informational asymmetries of this sort are to be directly recorded in phonological grammars.
J.生物化学.97-2。
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