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    • 3. 发明授权
    • Apparatus for storing multi-bit pixel data
    • 用于存储多位像素数据的装置
    • US4888582A
    • 1989-12-19
    • US158067
    • 1988-02-12
    • Charles B. Schnarel
    • Charles B. Schnarel
    • G06F3/153G09G5/00G09G5/02G09G5/39G09G5/393G09G5/42G09G1/16
    • G09G5/022G09G5/39G09G5/393
    • An apparatus for storing multi-bit pixel data comprises a random access memory, for storing a plurality of pixels at each addressable memory location, the memory having one write enable and one data input for each bit of each pixel at a currently addressed memory location. Means are provided to couple each line of a data bus to the write enable inputs associated with corresponding bits of each addressed pixel and to place a common bit, in a selected state, on every data input assosciated with a corresponding bit of each currently addressed pixel, thereby permitting a processor to rewrite the addressed pixels with a selected pixel value, provided the write enables of each pixel are activated by an appropriate bit on the associated data bus line, and thereby permitting a processor to write pixel data to the memory using only one bit per pixel on the data bus. The apparatus also comprises means to generate a data word, each bit in said data word corresponding to one pixel at the currently addressed memory location, the state of each bit depending on whether the corresponding pixel state meets selected criteria, the data word being selectively applied to the data bus.
    • 用于存储多位像素数据的装置包括随机存取存储器,用于在每个可寻址存储器位置存储多个像素,所述存储器具有一个写入使能和一个数据输入,用于当前寻址的存储器位置处的每个像素的每个位。 提供了用于将数据总线的每一行耦合到与每个寻址像素的对应位相关联的写入使能输入并且以选定状态将公共位置于与每个当前寻址像素的相应位相配合的每个数据输入上的公共位 从而允许处理器用所选择的像素值重写所寻址的像素,只要每个像素的写入使能由相关联的数据总线上的适当位激活,从而允许处理器仅将像素数据写入存储器 数据总线上每像素一位。 该装置还包括用于产生数据字的装置,所述数据字中的每一位对应于当前寻址的存储器位置处的一个像素,每个位的状态取决于对应的像素状态是否满足所选标准,该数据字被选择性地应用 到数据总线。