Introduction These nonlinear equations, in principle, are almost impossible to analyze and deal with exactly However, if the quantization amounts are small compared to the values of signal varia bles and filter parameters a simpler approximate theory based on a statistical model can be appliedIntroduction • These nonlinear equations, in principle, are almost impossible to analyze and deal with exactly • However, if the quantization amounts are small compared to the values of signal variables and filter parameters, a simpler approximate theory based on a statistical model can be applied