公开(公告)号：US4890327A

公开(公告)日：1989-12-26

申请号：US57474

申请日：1987-06-03

申请人： John Bertrand ,  Matthew J. Noah

发明人： John Bertrand ,  Matthew J. Noah

IPC分类号： G10L19/04 ,  G10L19/24

CPC分类号： G10L19/04 ,  G10L19/24

摘要： An analog to digital converter for a speech signal is implemented in modules to allow for changes in bit rate and changes in bit stream length according to requirements of the digital transmission system. A pre-emphasis circuit provides an array of pre-emphasized speech samples which are stored in memory. A linear predictive coder provides an array of reflection coefficients and an array of filter coefficients. A pulse processor receives the speech samples and filter coefficients and generates speech amplitude and location signals. These signals are multiplied to generate quantized speech samples. The quantized speech samples and reflection coefficients are provided to a buffer which provides an output signal of a proper bit stream length and bit rate for the digital transmission system.

摘要翻译： 用于语音信号的模数转换器在模块中实现，以允许根据数字传输系统的要求来改变比特率和比特流长度的变化。 预加重电路提供存储在存储器中的预先强调的语音样本阵列。 线性预测编码器提供反射系数阵列和滤波器系数阵列。 脉冲处理器接收语音样本和滤波系数，并产生语音幅度和位置信号。 这些信号被相乘以产生量化的语音样本。 将量化的语音样本和反射系数提供给缓冲器，该缓冲器为数字传输系统提供适当的比特流长度和比特率的输出信号。