The input gain element compresses the high dynamic range input signal, which is then processed by the low dynamic range signal processor ( filter and ADC ) followed by expansion cell as output gain element. 输入增益单元压缩高动态范围的输入信号,其输出信号由较低动态范围的信号单元再经模数转换器(ADC)量化输出,扩展单元在数字域恢复信号动态范围。