93. The method of claim 92 wherein said step of adjusting includes the step of adjusting said phase angles so that the inverse transformation of the amplitudes and adjusted phases contains a minimum amount of power in said preselected portions.
93. The method of claim 92 wherein said step of adjusting includes the step of adjusting said phase angles so that the inverse transformation of the amplitudes and adjusted phases contains a minimum amount of power in said preselected portions. 94. The combination of claim 93 wherein said step (c) of processing includes the step of delta modulating said equivalent signals and wherein said step of adjusting includes the step of adjusting said phase angles so that the inverse transformation of the amplitudes and adjusted phases is such that the difference between amplitudes of successive digitizations thereof are consistent with possible values obtainable from said step of delta modulating.