METHOD AND APPARATUS FOR PROCESSING SAMPLED DATA SIGNALS BY UTILIZING PRECONVOLVED QUANTIZED VECTORS

An electronic system for processing sampled data input signals includes an electronic memory which stores a set of preprocessed vectors V.sub.1 f(m, . . . ) thru V.sub.N *f(m, . . . ) where f(m, . . . ) is a sampled data function, having any number of dimensions m, . . . . * is a convolution operator, and V.sub.1 thru V.sub.N are a finite set of N unprocessed vectors each of which represents an anticipated group of input signal samples. After these preprocessed vectors are stored, input signals are processed in real time by (a) a circuit which samples the input signal; (b) a circuit which compresses the sequence of samples that is taken into a smaller sequence of index signals that correspond to the indexes 1 thru N of the unprocessed vectors; (c) a circuit which receives the smaller sequence of index signals and reads from the memory those preprocessed vectors whose indexes match the received index signals; and (d) a circuit which adds together the read preprocessed vectors while maintaining a predetermined offset between them as they are added.