Front-end system for a raster output scanner
    1.
    发明公开
    Front-end system for a raster output scanner 失效
    Integrals Eingang-AusgangssystemfürRastabtast-Druckeinheit。

    公开(公告)号:EP0310712A1

    公开(公告)日:1989-04-12

    申请号:EP87201897.3

    申请日:1987-10-05

    IPC分类号: G06K15/12 G06K15/02

    摘要: A front-end system for the conversion of graphical data and coded font data into a serial pixel-bit stream for a raster output scanner, such as a laser printer, comprises a front-end controller (16), input/output means (22, 24) which can be connected to a computer (129 or a data netwok, a memory for the storing of graphical data and coded font data, a fine formatter (26) for determining the final printing format, a bitmap memory for storing a bit representation of the page to be printed, a bitmap filler (28) for expanding the data and placing them into the bitmap memory, and a bitmap reader (30). The functions of the front-end controller (16) and of the input/output means (22, 26) are implemented in a first processor (32), and the functions of the fine formater (26) and the bitmap filler (28) are implemented in a second processor (34), while the bitmap reader (30) is formed by dedi­cated hardware logic. With this construction, a high speed page pro­cessing can be achieved with a reduced number of processors.

    摘要翻译: 用于将图形数据和编码字体数据转换成用于诸如激光打印机的光栅输出扫描仪的串行像素位流的前端系统包括前端控制器(16),输入/输出装置(22) ,24),其可以连接到计算机(129或数据网络,用于存储图形数据和编码字体数据的存储器,用于确定最终打印格式的精细格式器(26)),用于存储位的位图存储器 表示要打印的页面,用于扩展数据并将其放置到位图存储器中的位图填充(28)和位图读取器(30),前端控制器(16)和输入/ 在第一处理器(32)中实现输出装置(22,26),并且精细分页器(26)和位图填充器(28)的功能被实现在第二处理器(34)中,而位图读取器(30) )由专用硬件逻辑形成,通过这种结构,可以实现高速页面处理 处理器数量