Printer controller for a pagewidth printhead having...

Details Printer controller for a pagewidth printhead having... Printer controller for a pagewidth printhead having...

2011-01-25

2011-01-25

Grant, II, Jerome (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003010

Reexamination Certificate

active

07876475

ABSTRACT:
Provided is a printer controller for controlling a pagewidth printhead. The controller includes an interface for receiving an image having a bi-level black data layer compressed in an Edge Delta and Runlength (EDRL) compression format and a continuous tone (contone) CMYK data layer. Also included is an EDRL expander and a Joint Photographic Experts Group (JPEG) decoder unit for expanding the image by simultaneously decompressing the two data layers in parallel, as well as a halftoner and compositor unit for halftoning the contone CMYK data layer into bi-level CMYK data layer and compositing the bi-level black data layer over the bi-level CMYK data layer to form a composited bi-level CMYK image. The controller further includes a processor and memory arrangement configured to control the interface, the expander and decoder unit, and the halftoner and compositor unit, and further configured to transmit the composited bi-level CMYK image to a memory buffer of the pagewidth printer via a printhead interface.

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