发明名称 |
Printer controller integrated circuit |
摘要 |
Where the bandwidth of a data link between a printer and a computer is limited it may be desirable to transmit compressed page layout data over the data link. A printer controller chip is provided that processes compressed page layout data corresponding to a page layout having a bi-level black layer and a continuous tone graphics layer. The printer controller includes a number of functional modules including an edge delta runlength (EDRL) expander to derive bi-level black layer data from the compressed data. The controller also incorporates a JPEG decoder to derive continuous tone layer data from the compressed data. A halftoner and compositer module is provided to halftone the continuous tone data to bi-level CMYK data and to composite the bi-level layout data over the bi-level CMYK data to produce page layout print data. A printhead interface processes the page layout print data to generate signals to drive a pagewidth printhead.
|
申请公布号 |
US7164501(B2) |
申请公布日期 |
2007.01.16 |
申请号 |
US20040975407 |
申请日期 |
2004.10.29 |
申请人 |
SILVERBROOK RESEARCH PTY LTD |
发明人 |
LAPSTUN PAUL;WALMSLEY SIMON ROBERT;SILVERBROOK KIA |
分类号 |
G06K15/00;B41J2/165;B41J2/205;G06F3/12;G06K15/02;H04N1/41;H04N1/50 |
主分类号 |
G06K15/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|