Color video system using data compression and decompression

Details Color video system using data compression and decompression Color video system using data compression and decompression

G - Physics

09

G

375/18, 354/43

G09G 3/22 (2006.01) G06T 9/00 (2006.01) G09G 5/06 (2006.01)

Patent

CA 1235533

Abstract of the Disclosure A method of generating a color video display comprises the steps of dividing a color image to be displayed into a matrix of blocks, each block comprising a matrix of pixels, storing data identifying a multiplicity m of different colors, the data being stored in a color map memory having a unique address for the data identifying each different color; selecting different pairs of the m colors for different blocks of the color image to be displayed; generating a pixel data bit for each pixel in each of the different blocks, the value of each pixel data bit identifying one of the pair of colors selected for the block in which the corresponding pixel is located; generating different pairs of binary numbers representing the color map memory addresses of the different pairs of the m colors selected for different blocks; reading out of the color map memory the stored data representing the particular color selected for each pixel, in response to the data bit for that pixel and the corresponding one of said binary numbers representing the address of one of the colors selected for the block containing that pixel; and using the data read out of the color map memory to generate a video display comprised of pixels having the selected colors as identified by the data read out of the color map memory.

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