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A method of discriminating speech in the presence of ambient noise and a low rate vocoder for the implementation of the method.

机译：一种在存在环境噪声的情况下区分语音的方法和一种用于实现该方法的低速率声码器。

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摘要

P The speech discrimination method in the presence of ambient noise consists in analyzing a signal Sn composed of the sum of a determined number K of periodic excitations and an aperiodic excitation, to calculate (1) the autocorrelation global rm of the signal Sn, to calculate (2) the partial sums tm of the short-term autocorrelation sm correlated with the global autocorrelation rm, to initialize (3) a counter k and as long as the counter k does not reach the maximum value K corresponding to the maximum number of periodic excitations (6), for each incrementation (4) of the counter k, after having corrected (7) the calculation of the partial sums tm, to calculate (5) the values of the pitch Mk, betak gain and the slope of the alphak gain of each periodic excitation, and to determine the level of the aperiodic excitation beta0 as a function of the global autocorrelation rm at the beginning of the analysis and the total autocorrelation rm at the end of the analysis . BR/ Application: low rate vocoders. / P

机译：

在存在环境噪声的情况下的语音识别方法包括分析由确定的K个周期激励和非周期激励之和组成的信号Sn，以计算（1）信号Sn的自相关全局rm，计算（2）与全局自相关rm相关的短期自相关sm的部分和tm，初始化（3）计数器k，只要计数器k未达到对应于最大数量的最大值K周期激励（6）的计算，对于计数器k的每个增量（4），在校正（7）部分和tm的计算之后，可以计算（5）音调Mk，贝塔增益和斜率的值确定每个周期激励的alphak增益，并确定非周期激励beta0的水平，作为分析开始时的全局自相关rm和分析结束时的总自相关rm的函数。
应用：低速率声码器。展开▼

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公开/公告号FR2697937A1

专利类型
公开/公告日1994-05-13

原文格式PDF
申请/专利权人 THOMSON CSF;THOMSON CSF;
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申请/专利号FR19920013397
发明设计人 ANDRE LAURENT PIERRE;LAURENT PIERRE ANDRE;
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申请日1992-11-06
分类号G10L7/02;G10L9/08;
国家 FR
入库时间 2022-08-22 04:33:41

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