78. The combination of claim 77 wherein said signals output from said inverse transforming means are substantially symmetric, and wherein said deleting means includes means for deleting a symmetric half of said symmetric signals.
78. The combination of claim 77 wherein said signals output from said inverse transforming means are substantially symmetric, and wherein said deleting means includes means for deleting a symmetric half of said symmetric signals. 75. The combination of claim 78 further including means coupled to said deleting means and said generating means for storing the signals output therefrom.