Multi bit per pixel compression/decompression using parallel enc

Details Multi bit per pixel compression/decompression using parallel enc Multi bit per pixel compression/decompression using parallel enc

1995-12-18

1998-05-19

Mancuso, Joseph

395117, G06F 1500

Patent

active

057547467

ABSTRACT:
A system for printing background and foreground colors in response to mask data and printing instructions. Page description language data is separated onto three lines, two for Contone and solid colors, and one for control (mask data and instructions). The mask and instruction data is transformed into a series of multi-bit command words, each describing a pixel in terms of 1) control tag bits to specify color, 2) object optimized rendering tag bits to describe the type of color (solid, text, sampled or line art), 3) color space transformation bits to control conversion from other spaces to CYMK and 4) format tags to specify the number of bits per pixel. This series of command words combines information on one line that required at least two lines in the prior art, and the data is in easily compressable form, resulting in simplified hardware.

REFERENCES:
patent: 4888812 (1989-12-01), Dinan et al.
patent: 5225911 (1993-07-01), Buckley et al.
patent: 5530555 (1996-06-01), Taaka et al.

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