An Objective Measure Based on an Auditory Model for Assessing Low-Rate Coded Speech

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概要

• 論文の詳細を見る

• We propose an objective measure for assessing low-rate coded speech. The model for this objective measure, in which several known features of the perceptual processing of speech sounds by the human ear are emulated, is based on the Hertz-to-Bark transformation, critical-band filtering with pre-emphasis to boost higher frequencies, nonlinear conversion for subjective loudness, and temporal (forward) masking. The effectiveness of the measure, called the Bark spectral distortion rating (BSDR), was validated by second-order polynomial regression analysis between the computed BSDR values and subjective MOS ratings obtained for a large number of utterances coded by several versions of CELP coders and one VSELP coder under three degradation conditions : input speech levels, transmission error rates, and background noise levels. The BSDR values correspond better to MOS ratings than several commonly used measures. Thus, BSDR can be used to accurately predict subjective scores.

• 社団法人電子情報通信学会の論文
• 1995-06-25

著者

• Wada Tetsuro

  System Lsi Development Center Mitsubishi Electric Corporation

• Hayashi Shinji

  Ntt Human Interface Labs.

• Hayashi S

  Ntt Human Interface Lab. Musashino‐shi Jpn

• Watanabe Toshiro

  NTT Telecommunication Networks Laboratories

• Hayashi Shinji

  Ntt Human Interface Laboratories

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