両耳受聴音からの音源方向推定の精度向上に関する一検討 : HRTFデータへの適用

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  • リョウミミ ジュチョウオン カラノ オンゲン ホウコウ スイテイ ノ セイド コウジョウ ニ カンスル イチ ケントウ HRTF データ エノ テキヨウ
  • Performance improvement on DOA estimation from binaural sound

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Abstract

In order to improve estimation accuracy of directions of arrival (DOA) of sound sources, we propose a new weighting function for averaging multiple spctral components. We exploit a ratio between the eigen-values obtained from the auto correlation matrix at each frequency bin for an weighting function. This method improves the estimatuon accuracy in the cases where a single sound source exists. Furthermore, we propose a iterative method based on the weighted Wiener gain to coop with multiple source environment. At first, this method regards the maxmum peak in the spatial spectrum as a one source. Next, a filter to reduce the spectral components that contribute the maximum peak is applied and re-estimate the second source to detect the maximum peak in the residual spatial spectrum. While the methods using the eigen-ratio weighting function and the weighted Wiener gain were almost equivalent in a single source environment, the iterative method for the weighted Wiener gain only attained good performance for the cases where multiple sound source exist.

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