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    • 8. 发明授权
    • Signal processing method and apparatus, signal processing program, and recording medium
    • 信号处理方法和装置,信号处理程序和记录介质
    • US07720235B2
    • 2010-05-18
    • US10273529
    • 2002-10-18
    • Mototsugu AbeMasayuki Nishiguchi
    • Mototsugu AbeMasayuki Nishiguchi
    • H04B15/00
    • H04H60/37G10L19/02G11B27/102G11B27/28
    • A signal processing method divides a first signal of two signals to be compared in similarity into smaller regions, selects one of the regions, and calculates the correlation of the selected one with the other second signal. The method finds a time difference, an expansion factor, and a similarity in one region in which the maximum similarity as the square of the correlation is obtained, and performs integration in the position represented by the time difference and the expansion factor of values based on similarities. The method performs similar processing on all the regions, and evaluates similarity by, in a peak where the integrated value of similarities is a maximum, compares its magnitude with a threshold value. The region corresponding to the peak can be extracted.
    • 信号处理方法将要比较的两个信号的第一信号相似地划分为更小的区域,选择一个区域,并计算所选择的信号与另一个第二信号的相关性。 该方法在获得作为相关平方的最大相似度的一个区域中找到时间差,扩展因子和相似度,并且在由时间差表示的位置和基于 相似之处 该方法对所有区域执行类似的处理,并且通过在相似度的积分值为最大值的峰值中评估相似度,将其幅度与阈值进行比较。 可以提取与峰值相对应的区域。
    • 9. 发明授权
    • Method and apparatus for speech encoding and decoding by sinusoidal analysis and waveform encoding with phase reproducibility
    • 通过正弦分析和具有相位再现性的波形编码进行语音编码和解码的方法和装置
    • US07454330B1
    • 2008-11-18
    • US08736546
    • 1996-10-24
    • Masayuki NishiguchiKazuyuki IijimaJun MatsumotoShiro Omori
    • Masayuki NishiguchiKazuyuki IijimaJun MatsumotoShiro Omori
    • G10L19/14
    • G10L19/0212G10L19/02G10L19/04G10L19/06G10L19/12G10L25/27G10L25/93
    • A speech encoding method and apparatus in which an input speech signal is divided in terms of blocks or frames as encoding units and encoded in terms of the encoding units, whereby explosive and fricative consonants can be impeccably reproduced, while there is an attenuation of the occurrence of foreign sounds being generated at a transient portion between voiced (V) and unvoiced (UV) portions, so that the speech with high clarity devoid of “stuffed” feeling may be produced. The encoding apparatus includes a first encoding unit for finding residuals of linear predictive coding (LPC) of an input speech signal for performing harmonic coding and a second encoding unit for encoding the input speech signal by waveform coding. The first encoding unit and the second encoding unit are used for encoding a voiced (V) portion and an unvoiced (UV) portion of the input signal, respectively. Code excited linear prediction (CELP) encoding employing vector quantization by a closed loop search of an optimum vector using an analysis-by-synthesis method is used for the second encoding unit. A corresponding decoding method and apparatus is also provided.
    • 一种语音编码方法和装置,其中输入语音信号以块或帧为单位编码,并以编码单位编码,由此可以无可挑剔地复制爆炸和摩擦辅音,同时存在衰减的发生 在V(V)和无声(UV)部分之间的瞬态部分产生外来声音,从而可能产生具有高“透明度”感的语音。 编码装置包括:第一编码单元,用于求出用于执行谐波编码的输入语音信号的线性预测编码(LPC)的残差;以及第二编码单元,用于通过波形编码对输入的语音信号进行编码。 第一编码单元和第二编码单元分别用于对输入信号的有声(V)部分和无声(UV)部分进行编码。 第二编码单元使用通过使用合成分析法的最佳向量的闭环搜索采用矢量量化的码激励线性预测(CELP)编码。 还提供了相应的解码方法和装置。
    • 10. 发明授权
    • Method and apparatus for classifying signals, method and apparatus for generating descriptors and method and apparatus for retrieving signals
    • 用于分类信号的方法和装置,用于生成描述符的方法和装置以及用于检索信号的方法和装置
    • US07454329B2
    • 2008-11-18
    • US11287970
    • 2005-11-28
    • Mototsugu AbeMasayuki Nishiguchi
    • Mototsugu AbeMasayuki Nishiguchi
    • G10L15/00
    • G10L17/26
    • The input signal can be quickly and accurately classified and a descriptor can be generated according to the result of classification. Then, the input signal can be retrieved on the basis of the result of classification or the descriptor. A signal processing apparatus comprises a time block splitting section 3 for splitting an audio signal into blocks that are typically 1 second long, a feature extracting section 4 for extracting a characteristic quantity of 18 degrees on the signal attribute from the audio signal in each block and a vector quantizing section 5 for carrying out an operation of categorical classification for the audio signal of each block by means of a vector quantization technique that uses a VQ code book 8 and a characteristic vector formed from the characteristic quantity of 18 degrees. The vector quantizing section 5 outputs a classification label obtained as a result of the categorical classification and a descriptor indicating the reliability of the label. If a signal retrieving operation is conducted in the downstream, the result of the classification or the descriptor is used for the signal retrieval.
    • 可以快速,准确地分类输入信号,并根据分类结果生成描述符。 然后,可以基于分类结果或描述符来检索输入信号。 信号处理装置包括用于将音频信号分割成通常为1秒长的块的时间块分割部分3,用于从每个块中的音频信号中提取关于信号属性的18度的特征量的特征提取部分4,以及 矢量量化部分5,用于通过使用VQ码本8的矢量量化技术和由18度的特征量形成的特征矢量来执行每个块的音频信号的分类分类的操作。 矢量量化部5输出作为分类分类的结果而获得的分类标签和表示标签的可靠性的描述符。 如果在下游执行信号检索操作,则将分类结果或描述符用于信号检索。