Appeal No. 1998-0940
Application No. 08/085,605
description file (PDL) are decoded at a first resolution to
generate a first bit-mapped field of image data and the bit-
mapped field is stored in a frame-store. The bit-mapped field of
image data is fed to an interpolator which operates in real time
to interpolate the bit-mapped field to a second resolution,
higher than the first resolution. The higher resolution
interpolated data is used to expose a first image frame on a
recording member and, while data for one image frame is being
output from the frame-store’s memory and being interpolated and
being printed, data for a second image frame is being input into
the same frame-store that is currently outputting data of the
prior image frame. It is said that the invention reduces
bandwidth requirements for transferring data between the raster
image processor (RIP) and the frame-store and reduces the
processing time of the RIP since data is processed by the RIP at
the lower resolution.
Representative independent claim 4 is reproduced as follows:
4. A document generation method for providing an output
image having full printing resolution said method comprising the
steps of:
(a) receiving a set of image data having coded instructions
in a page description language;
(b) decoding said coded instructions in said image data at a
first resolution;
-2-
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