語音辨識裝置及其辨識方法SPEECH RECOGNITION DEVICE AND SPEECH RECOGNITION METHOD USING SPACE-FREQUENCY SPECTRUM

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

13/177,608

專利證號

US 8,918,319 B2

專利獲證名稱

語音辨識裝置及其辨識方法SPEECH RECOGNITION DEVICE AND SPEECH RECOGNITION METHOD USING SPACE-FREQUENCY SPECTRUM

專利所屬機關 (申請機關)

國立交通大學

獲證日期

2014/12/23

技術說明

本發明提出了一套使用麥克風陣列偵測關鍵字的方法，本方法運用聲源於麥克風陣列在不同頻率的特徵空間一致性(Spatial Eigenspace Consistency)，以及關鍵字語音共鳴曲線相似度(Resonant Curve Similarity)作為判別關鍵字的特徵，並藉由貝氏風險評估與串聯式分類器的結合做為偵測的機制。此方法在極低訊噪比下仍保有相當強健的辨識率，因而可以適用在遠距關鍵字語音偵測或者在吵雜的環境下作為關鍵字語音喚醒機制。 This invention proposes a method to detect keywords using microphone array. The consistency of the spatial eigenspaces formed by the speech source at different frequencies and the resonant curve similarity of the keyword are used as the features for detection. These features are processed and detected separately and the result is determined by cascading individual outcome using Bayes risk estimate. This proposed method can keep a high recognition rate under very low SNR conditions. Therefore, it is suitable for the applications such as distant wake-up and keyword detection in noisy environments.

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本部(收文號1090020336)同意該校109年4月6日交大研產學字第1091002952號函申請終止維護專利(交大)

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