Method of editing dot pattern data for character and/or image representations

Method of editing in the storage of a data processing system information which may be in the form of either characters or images to be represented in dot pattern lines on the page (or image screen) of a recording medium, wherein:

• (a) the information together with position data for arranging such information on the page is ayailable in storage in bit notation according to the dot pattern,
• (b) a selectively addressable storage--subsequently referred to as window storage (5)--which is smaller than would be necessary for representing an entire page bit-by-bit, is provided for editing part of the information of the page comprising n dot pattern lines,
• (c) a buffer storage (7) is provided for accommodating the contents of the window storage of k bit lines (k<n) which are to be recorded on the page later,
• (d) the bit lines of the window storage (5) are cyclically associated with successive dot pattern lines (P1, P2, P3) of the page,
• (e) the contents of the bit lines of the window storage (5), that have been edited for recording, are successively transferred line-by-line to the buffer storage (7),
• (f) after the contents of one or several bit lines of the window storage (5) have been transferred to the buffer storage (7), the bit lines of the window storage (5) thus becoming free are available for accommodating information to be newly edited for subsequent dot pattern lines (Pn+1, Pn+2 . . . ) on the page,
• (g) compared to the number of its bit lines, the window storage (5) has a mininum height which permits accommodating an image block field of an image subdivided into fields in the form of a matrix and treated as an image block, as well as an assumed character having predetermined upper and lower boundaries to accommodate maximum ascender, x- and descender heights in a reference area of full page width, and
• (h) the bit information of a block field in storage is accessed in continuous periods, and that this bit information is transferred in continuous periods to the part of the window storage (5) designated by the position data.