Do the compression restoration of the digital picture signal manner and the device

摘要

A method of compressing digital image data, comprising successive data groups of bits, the contents of which are values of pixels of an image, in which method a check is made in a selection step whether a first condition is satisfied which at least stipulates that a data group has the same contents as one or more data groups following thereon. If the first condition is satisfied, said data groups are replaced, in a compression step, by a compression code representing these data groups. Otherwise, in a copying step, only the first data group is replaced by a code consisting of the contents of the data group. The said steps are repeated for the next data groups. The method also comprises an identification step for adding an identification code for characterising the nature of the code, wherein the identification step is carried out only when the compression step is carried out. IMAGE