Method of compactly storing digital data

DETAILED DESCRIPTION This invention provides a method of storing digital data in a compact manner which includes the steps of sequentially entering a plurality of digital data entries into a first shift register having a plurality of stages and summing a preselected number of these data entries which are forced out of the shift register as new data is entered.
The resulting summations become compressed data entries in a second shift register which also has a plurality of stages.
As these compressed data entries are entered into the second shift register, a predetermined number of the compressed data entries which are forced out of the other end of the second shift register are again summed to produce a plurality of doubly compressed data entries which are stored in a third shift register.
Additional shift registers may be added and additional summing steps may be performed to provide sufficient data storage for the anticipated number of initial data entries.
Each successive shift register stores data in a more highly compressed form than the previous register.