公开(公告)号：US4401855A

公开(公告)日：1983-08-30

申请号：US211115

申请日：1980-11-28

申请人： Robert W. Broderson ,  Paul J. Hurst ,  Ronald D. Fellman

发明人： Robert W. Broderson ,  Paul J. Hurst ,  Ronald D. Fellman

IPC分类号： G10L19/06 ,  G10L1/06

CPC分类号： G10L19/06

摘要： Improved apparatus for the linear predictive coding of human speech in which the speech is sampled through the use of analog filters and the linear predictive coding computations are performed with respect to such samples using digital techniques. The filters are MOS switched capacitor filters which can be implemented on a silicon chip together with the digital circuitry. Specific circuits for implementing two different linear predictive coding speech analysis techniques are disclosed.

摘要翻译： 通过使用模拟滤波器对语音进行线性预测编码的改进的装置，并且使用数字技术对这些样本执行线性预测编码计算。 滤波器是MOS开关电容滤波器，其可以与数字电路一起在硅芯片上实现。 公开了用于实现两种不同的线性预测编码语音分析技术的具体电路。

公开(公告)号：US5880645A

公开(公告)日：1999-03-09

申请号：US887699

申请日：1997-07-03

申请人： James W. Everitt ,  Paul J. Hurst ,  Daniel L. Ray

发明人： James W. Everitt ,  Paul J. Hurst ,  Daniel L. Ray

IPC分类号： H04B7/005 ,  H03H7/30

CPC分类号： H04B7/005

摘要： The analog adaptive equalizer provides convergence of an error signal by decoupling the error canceller, the automatic gain control and the filter to provide truly adaptive error minimization. The invention includes an automatic gain control (AGC) circuit for providing broadband amplification of an input signal to generate an AGC output signal, a filter for receiving the AGC output signal and providing high frequency signal conditioning to generate a filter output signal, an error detection circuit for generating an error signal representing the difference between the filter output signal and an expected output signal and a calculator for receiving the error signal and providing a gain correction signal to the automatic gain circuit to adjust the gain of the automatic gain circuit and a filter control signal to adjust the filter range of the filter, the gain correction signal and the filter control signal being used to cancel the error signal. The calculator further comprises a first in, first out buffer for providing a history of the expected output signal to the calculator.

摘要翻译： 模拟自适应均衡器通过解耦误差消除器，自动增益控制和滤波器来提供误差信号的收敛，以提供真正的自适应误差最小化。 本发明包括用于提供输入信号的宽带放大以产生AGC输出信号的自动增益控制（AGC）电路，用于接收AGC输出信号并提供高频信号调理以产生滤波器输出信号的滤波器，误差检测 用于产生表示滤波器输出信号和预期输出信号之间的差的误差信号的电路和用于接收误差信号的计算器，并向自动增益电路提供增益校正信号，以调整自动增益电路的增益和滤波器 控制信号调整滤波器的滤波器范围，增益校正信号和滤波器控制信号用于消除误差信号。 计算器还包括用于向计算器提供预期输出信号的历史的第一入口，第一输出缓冲器。