. . . "The output of analog-to-digital convertor 106 is sO(n,k) and the output 116 from mixing module 108 is characterized as (1?????(k)), where ??(k)=C*??(k???1)+(1???C)*??(k), and where C is a constant between 0 and 1 and ??(k) is an output from the instantaneous mode value for block k." .