2. The method in claim 1, wherein said step of generating a reconstructed speech signal comprises the steps of: interpolating said replacement pitches to have signal values that are linear interpolations of the signal amplitude values of the temporally earlier and temporally later pitches at corresponding times relative to the start of the pitches.
3. The method in claim 2, wherein the interpolated pitch signal amplitudes are interpolated according to the expression: ##EQU3## where A.sup.i.sub.pnew,t is the computed desired amplitude of the new interpolated pitch for the sample corresponding to relative time t; A.sub.pref1,t is the reference pitch amplitude of the first reference pitch at the corresponding relative time t measured relative to the origin of each pitch; n is the number of pitches that have been omitted and which are to be reconstructed, and i is an index of the particular pitch for which the weighted amplitude is being computed.