Printer controller having jpeg and edrl circuitry
AssigneeSilverbrook Research Pty Ltd
InventorsPaul Lapstun, Simon Robert Walmsley, Kia Silverbrook
Life of this patent
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Abstract
A printer controller is provided having page data input circuitry for receiving compressed and encoded page data for expansion processing, JPEG decoding circuitry for decompressing contone data in the received page data, EDRL expansion circuitry for decompressing EDRL-compressed bi-level image data in the received page data, halftoning and compositing circuitry for halftoning and compositing the decompressed contone and bi-level data, and a printhead interface for receiving the compositing data and for writing corresponding print data to a printhead of the printer
Claims6
A printer controller comprising:
- page data input circuitry for receiving compressed and encoded page data for expansion processing;
- JPEG decoding circuitry for decompressing contone data in the received page data;
- EDRL expansion circuitry for decompressing EDRL-compressed bi-level image data in the received page data;
- halftoning and compositing circuitry for halftoning and compositing the decompressed contone and bi-level data;
- and
- a printhead interface for receiving the compositing data and for writing corresponding print data to a printhead of the printer.
Dependencies are inferred from the claim text.