PROCESS OF COMPRESSING A SUCCESSION OF DIGITAL DATA AND DEVICE FOR CARRYING OUT THE SAME

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 D.sub.n between two consecutive pixels X.sub.n-1 and X.sub.n 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 D.sub.n and X.sub.n-1. The process and device according to the invention are adapted to be applied, in particular, to the storage of images.