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Roles of temporal patterns of vowel-intrinsic cues in model identification of Korean vowels in spontaneous speech

홍순현
한국음운론학회 (The Phonology-Morphology Circle of Korea)|2021.08|음성음운형태론연구 (Studies in Phonetics, Phonology, and Morphology)|제27권 제2호|pp. 321-351|DOI 10.17959/sppm.2021.27.2.321

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참고문헌

키워드

KoreanmodeldurationF3F0F1F2vowelsvowel recognition
주제분류언어학

초록

This study investigates the perceptual roles of temporal patterns of vowel-intrinsic cues to identify Korean diphthong and monophthong signals in spontaneous speech from Seoul Corpus. Formant frequencies of vowel signals were sampled at 20%, 40%, 50%, 60%, and 80% of duration, and were averaged to be represented in the acoustic vowel space. Diphthongs showed two different drastic transitions from the onset to 50% of duration and from 50% to the offset, while monophthongs showed one straight-line transition from the onset to the offset. A neural network pattern recognition classifier was trained and tested on vowel signals, which included diphthongs and monophthongs, with various sets of formant samplings along duration coupled with F3, F0, and/or duration. The results show that three- and four-sample F1 and F2 characterized vowel signals better than one- and two-sample F1 and F2. F3, F0 and duration, when combined, had notable perceptual influences on spectral model identification of vowels.

Abstract

This study investigates the perceptual roles of temporal patterns of vowel-intrinsic cues to identify Korean diphthong and monophthong signals in spontaneous speech from Seoul Corpus. Formant frequencies of vowel signals were sampled at 20%, 40%, 50%, 60%, and 80% of duration, and were averaged to be represented in the acoustic vowel space. Diphthongs showed two different drastic transitions from the onset to 50% of duration and from 50% to the offset, while monophthongs showed one straight-line transition from the onset to the offset. A neural network pattern recognition classifier was trained and tested on vowel signals, which included diphthongs and monophthongs, with various sets of formant samplings along duration coupled with F3, F0, and/or duration. The results show that three- and four-sample F1 and F2 characterized vowel signals better than one- and two-sample F1 and F2. F3, F0 and duration, when combined, had notable perceptual influences on spectral model identification of vowels.

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