42. The combination of claim 41 wherein said input signals are time domain signals and wherein said phase adjusting means includes means for transforming said input signals to said frequency domain to produce a set of discrete amplitudes and phase angles, means for adjusting said phase angles to produce a modified set of discrete amplitudes and phase angles capable of being inversely transformed to modified time domain signals having at least partially symmetric portions, and means for inverse transforming said phase adjusted set of discrete amplitudes and phase angles to the time domain to generate said modified time domain signals; and wherein said deleting means includes means for deleting redundant portions of those partially symmetric portions of said modified time domain signals output from said inverse transforming means.
42. The combination of claim 41 wherein said input signals are time domain signals and wherein said phase adjusting means includes means for transforming said input signals to said frequency domain to produce a set of discrete amplitudes and phase angles, means for adjusting said phase angles to produce a modified set of discrete amplitudes and phase angles capable of being inversely transformed to modified time domain signals having at least partially symmetric portions, and means for inverse transforming said phase adjusted set of discrete amplitudes and phase angles to the time domain to generate said modified time domain signals; and wherein said deleting means includes means for deleting redundant portions of those partially symmetric portions of said modified time domain signals output from said inverse transforming means. 43. The combination of claim 42 wherein said signals output from said inverse transforming means are substantially symmetric, and wherein said means for deleting includes means for deleting a symmetric half of said symmetric signals.