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    • 3. 发明授权
    • Recognizing speech data using a state transition model
    • 使用状态转换模型识别语音数据
    • US06662159B2
    • 2003-12-09
    • US08739013
    • 1996-10-28
    • Yasuhiro KomoriYasunori OhoraMasayuki Yamada
    • Yasuhiro KomoriYasunori OhoraMasayuki Yamada
    • G10L1514
    • G10L15/142G10L2015/085
    • Detecting an unknown word in input speech data reduces the search space and the memory capacity for the unknown word. For this purpose, an HMM data memory stores data describing a state transition mode for the unknown word, defined by a number of states and the transition probability between the states. An output probability calculation unit acquires a state of the maximum likelihood at each time of the speech data, among the plural states employed in the state transition mode for a known word, employed in the speech recognition of the known word. The obtained result is applied to the state transition mode for the unknown word, stored in the HMM data memory, to obtain a state transition mode of the unknown word. A different output probability calculation unit determines the likelihood of the state transition mode for the known word. Then a language search unit effects the language search process, utilizing the likelihoods determined by the aforementioned two output probability calculation units, in a portion where the presence of the unknown word is permitted by the dictionary.
    • 检测输入语音数据中的未知字减少了未知单词的搜索空间和存储器容量。 为此,HMM数据存储器存储描述由状态数量和状态之间的转移概率定义的未知字的状态转换模式的数据。 输出概率计算单元在已知字的语音识别中采用的已知字的状态转换模式中采用的多个状态中,获取语音数据的每个时刻的最大似然度的状态。 将获得的结果应用于存储在HMM数据存储器中的未知字的状态转换模式,以获得未知字的状态转换模式。 不同的输出概率计算单元确定已知单词的状态转换模式的可能性。 然后,语言搜索单元利用由上述两个输出概率计算单元确定的可能性,在字典允许存在未知单词的部分中实现语言搜索处理。
    • 6. 发明授权
    • State transition model design method and voice recognition method and
apparatus using same
    • 国家过渡模式设计方法和语音识别方法及使用方法
    • US5812975A
    • 1998-09-22
    • US665503
    • 1996-06-18
    • Yasuhiro KomoriYasunori Ohora
    • Yasuhiro KomoriYasunori Ohora
    • G10L15/02G10L15/06G10L15/14G10L5/06
    • G10L15/063G10L15/144G10L2015/0631
    • A method of designing a state transition model capable of high speed voice recognition and a voice recognition method and apparatus using the state transition model is provided. The methods provide a state transition model in which a state shared structure of the state transition model is designed. The method includes a step of setting the states of a triphone state transition model in an acoustic space as initial clusters, a clustering step of generating a cluster containing the initial clusters by top-down clustering, a step of determining a state shared structure by assigning a short distance cluster among clusters generated by the clustering step, to the state transition model, and a step of learning a state shared model by analyzing the states of the triphones in accordance with the determined state shared structure.
    • 提供一种设计能够进行高速语音识别的状态转换模型的方法,以及使用状态转换模型的语音识别方法和装置。 该方法提供了状态转换模型,其中设计了状态转换模型的状态共享结构。 该方法包括将声音空间中的三态电话状态转换模型的状态设置为初始集群的步骤,通过自顶向下聚类生成包含初始集群的集群的聚类步骤,通过分配来确定状态共享结构的步骤 通过聚类步骤生成的聚类中的短距离聚类,状态转换模型,以及根据所确定的状态共享结构分析三态的状态来学习状态共享模型的步骤。
    • 7. 发明授权
    • Speech recognition apparatus utilizing utterance length information
    • 语音识别装置利用话音长度信息
    • US5774851A
    • 1998-06-30
    • US446077
    • 1995-05-19
    • Koichi MiyashibaYasunori Ohora
    • Koichi MiyashibaYasunori Ohora
    • G10L11/02G10L11/06G10L5/06
    • G10L25/87G10L25/06G10L25/09G10L25/93
    • An apparatus includes a speech pattern memory, a microphone, an utterance length detector circuit, an utterance length selector circuit, switches, and a pattern matching unit. The speech pattern memory stores a plurality of standard speech patterns grouped in units of utterance lengths. The utterance length detector circuit detects an utterance length of speech data input at the microphone. The utterance length selector circuit and the switches cooperate to read out standard speech patterns from a speech pattern memory corresponding to the utterance length detected by the utterance length detector circuit. The pattern matching unit sequentially compares the input speech pattern with the standard speech patterns sequentially read out in response to a selection signal from the utterance length selector circuit and performs speech recognition.
    • 一种装置包括语音图案存储器,麦克风,发声长度检测器电路,发声长度选择器电路,开关和模式匹配单元。 语音图形存储器存储以发音长度为单位分组的多个标准语音模式。 发声长度检测器电路检测在麦克风输入的语音数据的话音长度。 话音长度选择器电路和开关协调从对应于由发声长度检测器电路检测到的话音长度的语音模式存储器中读出标准语音模式。 模式匹配单元顺序地将输入语音模式与响应于来自话音长度选择器电路的选择信号顺序读出的标准语音模式进行比较,并执行语音识别。