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聲音辨識之動態時軸校正

聲音辨識之動態時軸校正. Reporter ： Ya-Zhong, Chen Network Application Lab. Outline. 時頻圖 特徵參數 樣本比對 動態時軸校正 問題與討論. 時頻圖. 頻率索引. 時間索引. 特徵參數. 100. 200. 300. 400. 500. 600. 700. 800. 900. 1000. 1100. 1200. 1300. 樣本比對. 待測試音. 規則樣本. 動態時軸校正. s y. s 2. s 1. t 1. t 2. t x. 動態時軸校正. s y.

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聲音辨識之動態時軸校正

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  1. 聲音辨識之動態時軸校正 Reporter：Ya-Zhong, Chen Network Application Lab.

  2. Outline • 時頻圖 • 特徵參數 • 樣本比對 • 動態時軸校正 • 問題與討論

  3. 時頻圖 頻率索引 時間索引

  4. 特徵參數 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300

  5. 樣本比對 待測試音 規則樣本

  6. 動態時軸校正 sy s2 s1 t1 t2 tx

  7. 動態時軸校正 sy 4 6 2 2 4 3 5 4 5 1 2 2 tx

  8. 動態時軸校正 sy 4 6 2 2 4 3 5 4 5 1 2 2 tx

  9. 動態時軸校正 sy 4 6 2 2 4 3 5 4 5 1 2 2 tx

  10. 動態時軸校正 sy 4 6 2 2 4 3 5 4 5 1 2 2 tx

  11. 動態時軸校正 sy 4 6 2 2 4 3 5 4 5 1 2 2 tx

  12. 動態時軸校正 sy 4 6 2 2 4 3 5 4 5 1 2 2 tx

  13. 動態時軸校正 sy 4 6 2 2 4 3 5 4 5 1 2 2 tx

  14. 問題與討論 • 若測試音檔與比對規則樣本屬同一種類鳴叫聲，那經由動態時軸校正後的差異性會很小。 • 設一差異值門檻值，若此差異性小於門檻值，便可判斷該測試音檔為此比對規則樣本所屬同種類。 • 動態時軸校正的複雜度與計算量，遠比暴力演算法要來的小。

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