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11. 发明授权

US5561777A Process for sequentially reading a page from an image memory in either of two directions 失效
标题翻译：用于在两个方向中的任一方向上从图像存储器顺序读取页面的处理
公开(公告)号：US5561777A
公开(公告)日：1996-10-01
申请号：US114552
申请日：1993-08-30
申请人： Jean-Swey Kao , Jack C. Liu , Ronald E. Rider
发明人： Jean-Swey Kao , Jack C. Liu , Ronald E. Rider
IPC分类号： G06F12/06 , G06T1/60 , G11C7/10 , G11C8/00 , G11C8/12 , G06F12/00 , G06F13/00 , G11C7/00
CPC分类号： G11C8/00 , G11C7/103 , G11C8/12
摘要： A process of loading an image in the form of a bit map into a memory which can transfer data words in burst mode in either row or column direction. First, the memory is divided into two sections with odd words stored in one section, even in the other, which allows ping pong buffers to be reading one word from memory while the next is being accessed. Also, the page height is set to be an odd number of words. Therefore, when the entire page is read in or out, successive words in either the row or column direction will always be alternately odd and even. If a partial image is read into the memory, this odd and even relationship will also hold. If an image with an even number of rows is read in, in order to preserve the sequential odd-even sequence, in every other column of the original data successive words are swapped so that the word order becomes 1, 0, 3, 2, etc. Then the addresses are also generated in staggered order, so that the words go into the correct location in memory. In this way, the word order of loading and reading of data is always successively odd and even regardless of the size of the image.
摘要翻译：以位图的形式将图像加载到存储器中的过程，该存储器可以在行或列方向上以突发模式传送数据字。首先，存储器被分成两部分，其中一个部分存储有奇数字，即使在另一部分中，也允许乒乓缓冲器在下一个被访问时从存储器读取一个字。此外，页面高度被设置为奇数个字。因此，当整个页面被读取或读出时，行或列方向上的连续字将总是交替地奇偶校验。如果将部分图像读入存储器，则这种奇数和偶数关系也将成立。如果读入具有偶数行的图像，为了保留顺序奇偶序列，在原始数据的每隔一列中连续字被交换，使得字顺序变为1,0,3,2，然后地址也以交错的顺序生成，使得这些词进入存储器中的正确位置。以这种方式，加载和读取数据的单词顺序总是连续地奇数，甚至不管图像的大小。

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