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電話語音信號之窄頻轉寬頻技術開發與實作
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電話語音信號之窄頻轉寬頻技術開發與實作

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電話語音信號之窄頻轉寬頻技術開發與實作 …

電話語音信號之窄頻轉寬頻技術開發與實作
Development and implementation of narrowband to wideband expansion used on telephony speech


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  • 1. 電話語音信號之窄頻轉寬頻技術開發與實作 Development and implementation of narrowband to wideband expansion used on telephony speech 指導教授:胡懷祖 博士 研究生:王慕羣
  • 2. 緒論 (1/8) Why improving? 2
  • 3. 緒論 (2/8) ● 人耳可聽到的聲音頻率範圍在 20Hz 至 20kHz ● 電話網路傳輸頻寬限制在 3.5kHz 以下 ● 改善電話語音音質 – 提高取樣率及增加傳輸位元 – 頻寬復原 (bandwidth recovery) 3
  • 4. 緒論 (3/8) How improving? 4