Time multiplexed image data decompression circuit

Details Time multiplexed image data decompression circuit Time multiplexed image data decompression circuit

2002-10-25

2008-03-25

Haskins, Twyler Lamb (Department: 2625)

Facsimile and static presentation processing

Natural color facsimile

Color separation

C358S001150, C358S001160, C358S539000, C358S426010, C358S425000

Reexamination Certificate

active

07349135

ABSTRACT:
A circuit which uses a compressor to divide each separation image into 8-line strips, and to independently compress each strip, a single decompressor to decompress two or more color image separations, strip by strip, by interleaving them, and to apply them to two or more print heads, one for each color separation. DMA from a main memory is used to apply both separations to the decompressor, and the decompressor output is demultiplexed into two print heads, one for each separation. This is done to drive each color separation simultaneously in a single-pass color printer. Multiplexing logic controls the DMA into the decompressor and the output of the decompressor into separate buffers for each color separation. Additional logic uses the page and line sync from each print head to synchronize the accessing of the correct image raster from buffers at the output of the decompressor to the associated print head.

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