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    • 2. 发明授权
    • Pitch modification method by glottal closure interval extrapolation
    • 通过声门闭合间隔推断进行间距修正
    • US6125344A
    • 2000-09-26
    • US137606
    • 1998-08-21
    • Dong Gyu KangJung Chul LeeSang Hun KimJun Park
    • Dong Gyu KangJung Chul LeeSang Hun KimJun Park
    • G10L21/003G10L21/013G10L21/04G10L21/00G10L13/00
    • G10L21/003G10L21/04G10L21/013
    • The present invention relates to an improved pitch modification method by glottal closure interval extrapolation. It is an object of the present invention to modify pitches of speech signals by the glottal closure interval extrapolation and to maintain quality of the modified speech, when concatenating original speech segments to synthesize speech. An input speech signal is converted into a digital speech signal. A glottal closure interval is detected in the digital speech signal so as to estimate vocal tract parameters by using pitch synchronous analysis. Vocal tract characteristic signals of the glottal closure interval and glottal characteristic signals of a glottal open interval are separated from each other according to the detected glottal closure interval. The separated vocal tract characteristic signals are extrapolated and reduced to a desired pitch length by the estimated vocal tract parameter. The extrapolated and reduced vocal tract characteristic signals are overlapped and added to the separated glottal characteristic signal so as to generate a synthetic speech signal which varies in a desired pitch length.
    • 本发明涉及通过声门闭合间隔外推的改进的间距改变方法。 本发明的目的是通过声门闭合间隔外推来修改语音信号的音调,并且当连接原始语音片段以合成语音时,保持修改的语音的质量。 输入语音信号被转换为数字语音信号。 在数字语音信号中检测到声门闭合间隔,以便通过使用音调同步分析来估计声道参数。 根据检测到的声门闭合间隔,声门闭合间隔和声门开放间隔的声门特征信号的声道特征信号彼此分离。 分离的声道特征信号通过估计的声道参数被外推并减小到期望的音高。 外推和降低的声道特征信号被重叠并添加到分离的声门特征信号中,以产生以所需音调长度变化的合成语音信号。
    • 9. 发明授权
    • Fast search method for LSP quantization
    • 用于LSP量化的快速搜索方法
    • US06622120B1
    • 2003-09-16
    • US09498998
    • 2000-02-04
    • Byung Sik YoonSang Won KangChang Yong SonHyoung Jung KimJung Chul Lee
    • Byung Sik YoonSang Won KangChang Yong SonHyoung Jung KimJung Chul Lee
    • G10L1912
    • G10L19/06
    • A fast search method for LSP (Linear Spectrum Pair) quantization is provided. The fast search method in accordance with an embodiment of the present invention includes the following steps. A first step is obtaining a target vector and a code vector. The target vector and the code vector are converted for ordering property. A second step is generating a code book having the ordering property for sub-matrices by utilizing the target vector and the code vector. A third step is selecting a particular line for determining a search scope in the code books and sorting the code book in descending order with respect to component values of the particular line. A fourth step is determining the search scope by utilizing the ordering property of the target vector and the sorted code vectors. The fifth step is obtaining an error standard by utilizing the target vector and the code vector, and obtaining an optimal code vector by utilizing the error standard within the determined search scope.
    • 提供了一种用于LSP(线性频谱对)量化的快速搜索方法。 根据本发明的实施例的快速搜索方法包括以下步骤。 第一步是获得目标矢量和码矢量。 目标向量和代码矢量被转换为排序属性。 第二步是利用目标矢量和码矢量生成具有子矩阵的排序特性的码本。 第三步是选择用于确定代码簿中的搜索范围的特定行,并且相对于特定行的分量值按降序排序代码本。 第四步是通过利用目标矢量的排序属性和分类的代码矢量来确定搜索范围。 第五步是通过利用目标矢量和码矢量来获得误差标准,并通过利用所确定的搜索范围内的误差标准来获得最佳码矢量。