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1. 发明授权

US5542041A Apparatus for, and methods of, providing a universal format of pixels and for scaling fields in the pixels 失效
标题翻译：用于提供像素的通用格式并用于缩放像素中的场的装置和方法
公开(公告)号：US5542041A
公开(公告)日：1996-07-30
申请号：US319427
申请日：1994-10-06
申请人： James J. Corona
发明人： James J. Corona
IPC分类号： G09G5/36 , G06T3/40 , G09G5/395 , H04N1/407 , G06F15/00
CPC分类号： G09G5/395
摘要： Raster display memories are often arranged to output groups of pixels in progressive blocks, each having a plurality of pixels and each pixel having a plurality of fields. The fields in each pixel may provide color, overlay and cursor information for an individual position on a video screen. The numbers of bits in each pixel and in each field may be variable in different applications. In this system, control information indicates the starting position of each block, the location of each pixel in each block and each field in each pixel and the width of each pixel and each field in number of bits. Using this control information, the system recovers the pixels in each block and the fields in each pixel and processes such information to provide a display of the pixel information on a video screen. The number of bits contained in each field may be expanded to a width (e.g. 8) when the field width is less than eight (8) bits. In this expansion, the expanded field value has an error, compared to the field value before expansion, less than half of the least significant bit in the expanded field. Frequently, the bits in each field before expansion are provided in the positions of greatest binary significance in the expanded field. The unused positions in the expanded field are then filled in the order of progressively decreasing significance by the bits of progressively decreasing significance in the field before expansion, starting from the bit of greatest significance.
摘要翻译：栅格显示存储器经常被布置为输出渐进块中的像素组，每个像素具有多个像素，每个像素具有多个场。每个像素中的字段可以为视频屏幕上的单个位置提供颜色，覆盖和光标信息。每个像素和每个场中的位数可以在不同的应用中变化。在该系统中，控制信息指示每个块的开始位置，每个块中的每个像素的位置和每个像素中的每个场以及每个像素的宽度和每个场的位数。使用该控制信息，系统恢复每个块中的像素和每个像素中的场，并处理这些信息以在视频屏幕上提供像素信息的显示。当字段宽度小于八（8）位时，每个字段中包含的位数可以扩展到宽度（例如8）。在这种扩展中，扩展的字段值与扩展前的字段值相比具有小于扩展字段中最低有效位的一半的错误。通常，扩展前的每个字段中的位被提供在扩展字段中具有最大二进制含义的位置。然后，从最大意义的位开始，在扩展字段中的未使用位置以逐渐减小的显着性的顺序被填充，这些比特在扩展之前的字段中逐渐减小的显着性。

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