In the simplest form of LPC coding, voiced excitation consists of a train of impulses which differs a great deal real world cases, where each excitation pulse possesses a certain shape, different an ideal impulse. The shape of the pulse contain

扫频功能key2level.v 按键点击一次，输出信号电平变化一次； key2pulse.v 按键点击一次，输出信号产生一个周期的脉冲信号；-weep function key2level.v Press the button once, the output signal level changes once Key2pulse.v Press the button once, the output signal to generate a cycle o