| 摘要 |
PURPOSE:To execute more efficiently the expanding processing of a document data than conventional systems as well as compression with higher compressing rate than that of conventional systems by improving the compressing rate and the expanding processing efficiency where the document data of the same contents continues for 2 rasters' share or more. CONSTITUTION:The document data after compressing the document data of a pattern as shown in a code 1 is shown in code 2 by a conventional compressing system. According to this invention, as to the document data where it is consecutive for two rasters' share or more, the data is compressed into the compressed data for one raster's share and the combination of an identification data including the information relating to the raster number. That is, a compressed data A for n-rasters' share is compressed into the compressed data A of one raster's share and an indentification data alpha, a compressed data C of m-rasters' share is compressed into the compressed data C of one raster's share and an identification data beta, and a compressed data E of n-rasters' share is compressed into the compressed data E of one raster's share and an identification data gamma respectively. Thus, the document data after compression is as shown in code 3 and the result is compressed much remarkably in comparison with the conventional case. |
