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    • 5. 发明授权
    • Method of speech recognition using hidden trajectory Hidden Markov Models
    • 使用隐藏轨迹隐马尔可夫模型的语音识别方法
    • US07617104B2
    • 2009-11-10
    • US10348192
    • 2003-01-21
    • Li DengJian-Iai ZhouFrank Torsten Bernd Seide
    • Li DengJian-Iai ZhouFrank Torsten Bernd Seide
    • G10L15/14
    • G10L15/142
    • A method of speech recognition is provided that determines a production-related value, vocal-tract resonance frequencies in particular, for a state at a particular frame based on the production-related values associated with two preceding frames using a recursion. The production-related value is used to determine a probability distribution of the observed feature vector for the state. A probability for an observed value received for the frame is then determined from the probability distribution. Under one embodiment, the production-related value is determined using a noise-free recursive definition for the value. Use of the recursion substantially improves the decoding speed. When the decoding algorithm is applied to training data with known phonetic transcripts, forced alignment is created which improves the phone segmentation obtained from the prior art.
    • 提供了一种语音识别方法,其基于与使用递归的两个先前帧相关联的生产相关值来确定特定帧处的状态的特定生产相关值,声道共振频率。 生产相关值用于确定观察到的状态特征向量的概率分布。 然后从概率分布确定为帧接收的观测值的概率。 在一个实施例中,使用针对该值的无噪声递归定义来确定生产相关值。 使用递归大大提高了解码速度。 当解码算法应用于具有已知语音抄本的训练数据时,产生强制对准,其改善了从现有技术获得的电话分割。