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    Acoustic echo canceler and handsfree telephone set
    3.
    发明授权
    Acoustic echo canceler and handsfree telephone set 有权

    公开(公告)号：US07003095B2

    公开(公告)日：2006-02-21

    申请号：US09809929

    申请日：2001-03-16

    申请人： Takehiro Nakai ,  Hiroshi Katayama ,  Chiharu Kawai ,  Hideaki Kurihara

    发明人： Takehiro Nakai ,  Hiroshi Katayama ,  Chiharu Kawai ,  Hideaki Kurihara

    IPC分类号： H04M9/08

    CPC分类号： H04M9/082

    摘要： The present invention provides an acoustic echo canceler for use in a telephone set having a handsfree conversation function. This acoustic echo canceler simultaneously achieves both the stabilization and speedup of an estimation operation and also attains the more improvement of speech quality. Moreover, the present invention provides a handsfree telephone set employing this acoustic echo canceler. Furthermore, this acoustic echo canceler is operative to cancel an echo generated by inputting an output of an acoustic device to itself substantially simultaneously with the outputting the output thereof. Further, this acoustic echo canceler comprises an adaptive filter for performing an operation of estimating the frequency characteristic and the phase characteristic of a part, whose frequency characteristic and phase characteristic vary, on an acoustic path and a fixed coefficient filter for simulating a part, whose frequency characteristic and phase characteristic are fixed, on the acoustic path.

    Speech recognizing apparatus
    4.
    发明授权
    Speech recognizing apparatus 失效
    语音识别装置

    公开(公告)号：US06701292B1

    公开(公告)日：2004-03-02

    申请号：US09699777

    申请日：2000-10-30

    申请人： Chiharu Kawai ,  Hiroshi Katayama ,  Takehiro Nakai

    发明人： Chiharu Kawai ,  Hiroshi Katayama ,  Takehiro Nakai

    IPC分类号： G10L1510

    CPC分类号： G10L15/10

    摘要： A speech-recognizing apparatus for recognizing input speech comprises, an analysis unit for computing a characteristic vector for each of frames of the input speech, a correction-value storage unit for storing a correction distance in advance, a vector-to-vector-distance-computing unit for computing a vector-to-vector distance between the characteristic vector and the phoneme characteristic vector, an average-value-computing unit for computing an average value of vector-to-vector distances for one of the frames, a correction unit for computing a corrected vector-to-vector distance as a value of an expression of (the vector-to-vector distance-the average value+the correction distance), and a recognition unit for cumulating corrected vector-to-vector distances into a cumulative vector-to-vector distance and comparing the cumulative vector-to-vector distance with the word standard pattern in order to recognize the input speech.

    摘要翻译： 用于识别输入语音的语音识别装置包括：用于计算输入语音的每个帧的特征向量的分析单元，用于预先存储校正距离的校正值存储单元，矢量到矢量的距离 计算单元，用于计算特征矢量和音素特征向量之间的矢量到矢量的距离;平均值计算单元，用于计算一个帧的矢量到矢量距离的平均值，校正单元 用于计算校正的矢量到矢量距离作为（矢量到矢量距离 - 平均值+校正距离）的表达式的值，以及用于将校正的矢量到矢量距离累加到 累积矢量到矢量距离，并将累积矢量与矢量距离与字标准模式进行比较，以识别输入语音。

    Speech processing coder, decoder and command recognizer
    5.
    发明授权
    Speech processing coder, decoder and command recognizer 失效
    语音处理编码器，解码器和命令识别器

    公开(公告)号：US5909662A

    公开(公告)日：1999-06-01

    申请号：US793838

    申请日：1997-03-11

    申请人： Yasushi Yamazaki ,  Tomohiko Taniguchi ,  Tomonori Sato ,  Hitoshi Matsuzawa ,  Chiharu Kawai

    发明人： Yasushi Yamazaki ,  Tomohiko Taniguchi ,  Tomonori Sato ,  Hitoshi Matsuzawa ,  Chiharu Kawai

    IPC分类号： G10L15/26 ,  G10L19/00 ,  G10L19/04 ,  G10L3/02

    CPC分类号： G10L19/04 ,  G10L15/26 ,  G10L19/00 ,  H04M2201/40

    摘要： The present invention relates to a speech processing device equipped with both a speech coding/decoding function and a speech recognition function, and is aimed at providing a speech processing device equipped with both a speech coding/decoding function and a speech recognition function by using a small amount of memory. The speech processing device of the present invention includes a speech analysis unit for obtaining analysis results by analyzing input speech, a codebook for storing quantization parameters and quantization codes indicating the quantization parameters, a quantizing unit for selecting the quantization parameters and the quantization codes corresponding to the analysis results from the codebook and for outputting selected quantization parameters and selected quantization codes, a coding unit for outputting encoded codes of the input speech including the selected quantization codes, a speech dictionary for storing registered data which represent speech patterns by using the codebook, and a matching unit for obtaining the speech patterns corresponding to the input speech by using one of the analysis results, the selected quantization parameters, and the selected quantization codes.

    摘要翻译： PCT No.PCT / JP96 / 02254 Sec。 371日期1997年3月11日 102（e）1997年3月11日PCT PCT 1996年8月8日PCT公布。 公开号WO97 / 07498 日期1997年2月27日本发明涉及一种配备有语音编码/解码功能和语音识别功能的语音处理装置，其目的在于提供一种配备语音编码/解码功能和语音的语音处理装置 识别功能通过使用少量内存。 本发明的语音处理装置包括语音分析单元，用于通过分析输入语音获得分析结果，存储量化参数的码本和指示量化参数的量化码;量化单元，用于选择量化参数和对应于 来自码本的分析结果和用于输出所选择的量化参数和选择的量化码;编码单元，用于输出包括所选择的量化码的输入语音的编码代码;用于通过使用码本存储表示语音模式的登记数据的语音字典; 以及匹配单元，用于通过使用分析结果，所选择的量化参数之一和所选择的量化代码来获得与输入语音相对应的语音模式。