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2. 发明授权

US4813074A Method of and device for segmenting an electric signal derived from an acoustic signal 失效
标题翻译：用于分割从声信号导出的电信号的方法和装置
公开(公告)号：US4813074A
公开(公告)日：1989-03-14
申请号：US930835
申请日：1986-11-14
申请人： Stephen M. Marcus
发明人： Stephen M. Marcus
IPC分类号： G10L15/02 , G10L15/04 , G10L7/02
CPC分类号： G10L15/04
摘要： A method and device for segmenting an electric (acoustic) signal. A number of parameters, for example "log area" parameters, are derived as a function of time from the electric signal (block 2). For consecutive instants the signals of the parameters located within a time interval around each instant are taken up and transition functions (.0..sub.i ) are derived therefrom for each instant (block 3). Subsequently similarity factors (c.sub.ij) are determined each between two transition functions (.0..sub.i and .0..sub.j) associated with respective proximate instants (i and j) (block 4) and a replacing transition function (.0..sub.ij.sup.c) is derived (block 6) from the transition functions of at least one group of two transition functions for which the associated similarity factor is larger than a reference value V, the transition function (.0..sub.ij.sup.c) replace the aforementioned transition functions from which it is derived (block 7).A combined transition function (.0..sub.ij.sup.c) replacing one of these transition functions is preferably calculated from the aforementioned transition functions, while the other of these transition functions are omitted. The group of transition functions for which the similarity factor is largest is preferably taken (block 5). The method is subsequently repeated (FIG. 1). Transition functions obtained are very suitable for use in the transmission or recognition of speech signals and for coding diphones.
摘要翻译：一种用于分割电（声）信号的方法和装置。多个参数，例如“日志区域”参数，根据电信号被导出为时间的函数（框2）。对于连续的时刻，每个时刻周围的时间间隔内的参数的信号被占用，并且从每个时刻得到转移函数（Oi）（框3）。随后，在与相应的近似时刻（i和j）（框4）相关联的两个过渡函数（O i和O j）之间确定相似性因子（cij）（块4），并且从转换函数导出替代转移函数（Oijc）对于相关联的相似因子大于参考值V的至少一组两个转换函数，转移函数（Oijc）替换其导出的前述转移函数（框7）。优选地，根据上述转换函数来计算代替这些转换函数之一的组合转换函数（Oijc），而省略这些转移函数中的另一个。优选相似因子最大的过渡函数组（框5）。随后重复该方法（图1）。所获得的转换功能非常适用于语音信号的传输或识别以及编码双声道。

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