4e4f6560_imator___MATLAB_mfilt_firdecim__Description
[Name] PersistentMemory [Values] false, true [Description] 
Determines whether the filter states get restored to zeros for each filtering operation. The starting values are the values in place when you create the filter if you have not changed the filter since you constructed it. PersistentMemory set to false returns filter states to the default values after filtering. States that the filter does not change are not affected. Setting this to true allows you to modify the States, InputOffset, and PolyphaseAccum properties.
Direct-form FIR polyphase decimator - MATLAB mfilt.firdecim