METHOD OF COMPRESSING A TRAIN OF DIGITAL INFORMATION, AND APPARATUS THEREFOR

摘要

The invention is related to the compression of digitized data to load a buffer memory with a view to the transfer of data towards a mass storage. The invention consists especially in transmitting the difference Dn between two consecutive pixels Xn-1 and Xn instead of these latter, this difference being the most often codable on a small number of bits and in suppressing the sign bit whenever possible, i.e. each time that the indetermination on the sign is raised by the comparison between Dn and Xn-1. The process and device according to the invention are adapted to be applied, in particular, to the storage of images.