3. An apparatus as defined in claim 2, further comprising a coefficient averager and buffer coupled to said coefficient integrator and storage means for time-averaging each of the said coefficients.
3. An apparatus as defined in claim 2, further comprising a coefficient averager and buffer coupled to said coefficient integrator and storage means for time-averaging each of the said coefficients. 4. An apparatus as defined in claim 3 wherein the feedback control means includes a means for multiplying the scaled forward prediction error from each stage of said lattice filter by the sign of the backward prediction error from that same stage.