Patent ID: 7817306
Filing Date: 2010-10-19
Classification: B41J,G03G,G06F,G06K,H04N

Abstract:
1. A method of page expansion and printing of image data received from a computer, said method comprising the steps of: receiving a page description from the computer, the page having a bi-level black layer compressed in an EDRL (Edge Delta and Runlength) format and a continuous tone (“contone”) layer, decompressing the respective layers in parallel; halftoning the contone layer data to bi-level data and compositing the bi-level black layer over the bi-level data to form an image; transmitting the image data for printing to a pagewidth printhead arrangement; and operating the pagewidth printhead arrangement according to one of a low-speed nozzle firing mode and a high-speed firing mode, the low-speed firing mode having a firing rate half that of the high-speed firing mode.