| 摘要 |
A print engine/controller suited to use with a drop on demand print head. The print engine/controller works with compressed page data having both JPEG contone image layers and a bi-level image plane compressed using a Group 4 facsimile protocol. It receives compressed image plane's and effects expansion and printing in a pipeline fashion. It consists of a high speed serial interface 27 (such as a standard IEEE 1394 interface), a standard JPEG decoder 28 , a standard Group 4 Fax decoder, a halftoner/compositor unit 29 , a tag encoder 30 by which to place infrared tags into a printed page, a line loader/formatter unit 31 feeding an interface 32 to the print head 33 . The decoders 28,88 and encoder 30 are buffered to the halftoner/compositor 29.
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