| 摘要 |
A printer includes a processor, and a printhead interfaced to the processor and which is configured to print ink. The processor includes an address, data and control bus. An expander unit and a decoder unit are each coupled to the bus and configured respectively to decompress a bi-level black layer and a contone layer of a page to be printed. A halftoner/compositor unit is coupled to the bus, and is configured to halftone the decompressed contone layer to form a bi-level cyan, yellow, magenta, and black (CYMK) layer and then composite the decompressed bi-level black layer over the bi-level CYMK layer to form a bi-level CYMK image of the page to be printed. A printhead interface couples the bus to the printhead so that the printhead can print the CYMK image.
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