母音ホルマント分布に基づく男女間平均声道長比の推定  [in Japanese] Estimation of average vocal-tract-length ratios between adult males and females from formant distributions of vowels  [in Japanese]

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Author(s)

Abstract

本研究は,われわれの提案した3つの音声処理法(逆フィルタ制御(IFC)ホルマント推定法,真の母音ホルマント分布推定のためのデータ縮減法,単語ホルマント軌跡を用いた話者声道長比推定法)の妥当性を,新たな角度から検証する目的で行われた.まず,4種の単語データベースの男女性話者による発話の単語母音から,IFC法とデータ縮減法を用いてF_1-F_2分布を推定した.つぎに,男女声それぞれの母音ホルマント分布中心点(重心)相関より,男女間の平均的な声道長比を推定した.また一方で,同じデータベースを用いて,同一単語ホルマント軌跡の2話者間相関をとる方法で,各話者の相対的な声道長を推定した後,男女間平均声道長比を算出した.異なる2つの方法によって推定された男女間平均声道長比がどのデータベースでも約1%以内の偏差で一致することから,提案した3つの音声処理法の有効性が確認された.

This study aims to confirm, from a different point of view, the effectiveness of three speech processing methods that we proposed; the inverse filter control (IFC) method for formant estimation, the data reduction method for searching true F1-F2 distribution, and the method for estimating relative vocal-tract-lengths (VTLs) from formant trajectories. First of all, we estimated male and female F1-F2 distributions of five vowels using IFC method and the data reduction method from four databases containing many word utterances. Next, average VTL ratios between male and female speakers were estimated from correlations using the centers of gravity in the distributions of five vowels. On the other hand, we estimated all speakers' relative VTLs using the correlations between formant trajectories of same words uttered by two speakers. From the results, average VTL ratios between male and female speakers were computed. The average VTL ratios estimated by the two different methods correspond in the deviation within about 1% in any of the four databases. As a result, the effectiveness of three proposed methods has been confirmed.

Journal

  • Technical report of IEICE. EA

    Technical report of IEICE. EA 112(47), 47-52, 2012-05-17

    The Institute of Electronics, Information and Communication Engineers

References:  12

Codes

  • NII Article ID (NAID)
    110009569387
  • NII NACSIS-CAT ID (NCID)
    AN10164817
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    0913-5685
  • NDL Article ID
    023744480
  • NDL Call No.
    Z16-940
  • Data Source
    CJP  NDL  NII-ELS 
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