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首页> 外文期刊>Computer speech and language >Two dimensional featured one dimensional digital waveguide model for the vocal tract
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Two dimensional featured one dimensional digital waveguide model for the vocal tract

机译：声道的二维特征一维数字波导模型

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摘要

A vocal tract model based on a digital waveguide is presented in which the vocal tract has been decomposed into a number of convergent and divergent ducts. The divergent duct is modeled by a 2D-featured 1D digital waveguide and the convergent duct by a one dimensional waveguide. The modeling of the divergent duct is based on splitting the volume velocity into axial and radial components. The combination of separate modeling of the divergent and convergent ducts forms the foundation of the current approach. The advantage of this approach is the ability to get a transfer function in zero-pole form that eliminates the need to perform numerical calculations on a discrete 2D mesh. In this way the present model named as a 2D-featured 1D digital waveguide model has been found to be more efficient than the standard 2D waveguide model and in very good comparison with it in the formant frequency patterns of the vowels /a/, /e/, /i/, /o/ and /u/. The model has two control parameters, the wall and glottal reflection coefficients that can be effectively employed for bandwidth tuning. The model also shows its ability to generate smooth dynamic changes in the vocal tract during the transition of vowels.
机译：提出了一种基于数字波导的声道模型，其中声道已分解为许多会聚和发散的管道。发散导管由具有2D功能的1D数字波导建模，会​​聚导管由一维波导建模。发散管道的建模基于将体积速度分为轴向和径向分量。分别对发散和会聚管道建模的组合构成了当前方法的基础。这种方法的优点是能够获得零极点形式的传递函数，从而无需在离散的2D网格上执行数值计算。通过这种方式，已发现名为2D功能1D数字波导模型的本模型比标准2D波导模型更有效，并且在元音/ a /，/ e的共振峰频率模式中与之进行了很好的比较。 /，/ i /，/ o /和/ u /。该模型具有两个控制参数，即壁反射系数和声门反射系数，可以有效地用于带宽调整。该模型还显示了其在元音过渡期间在声道中产生平滑动态变化的能力。

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  • 来源
    《Computer speech and language》 |2015年第1期|47-66|共20页
  • 作者

    Tahir Mushtaq Qureshi; Khalid Saifullah Syed;

  • 作者单位

    Center for Advanced Studies in Pure and Applied Mathematics (CASPAM), Bahauddin Zakariya University, Bosan Road, Multan 60800, Pakistan;

    Center for Advanced Studies in Pure and Applied Mathematics (CASPAM), Bahauddin Zakariya University, Bosan Road, Multan 60800, Pakistan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Waveguide; Vocal tract; Fractional delay; Transfer function;

    机译：波导;声带分数延迟;转换功能;

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