Browse Prior Art Database

Apparatus and Associated Method for Compression/Decompression of Color Digital Information

IP.com Disclosure Number: IPCOM000118911D
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Duvall, KE: AUTHOR [+2]

Abstract

Disclosed is a data compression and decompression technique which provides a fast and reliable method of binary stream interpretation and compression of digital data. The algorithms provide digital decompression and compression of a data stream without loss of visual or content fidelity. Because of the rapid processing time, real time digital data compression/decompression on low cost hardware is realized for color video transmission data rates (very high data rates).

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Apparatus and Associated Method for Compression/Decompression of
Color Digital Information

      Disclosed is a data compression and decompression technique
which provides a fast and reliable method of binary stream
interpretation and compression of digital data.  The algorithms
provide digital decompression and compression of a data stream
without loss of visual or content fidelity.  Because of the rapid
processing time, real time digital data compression/decompression on
low cost hardware is realized  for color video transmission data
rates (very high data rates).

      Each 32 bits represented a word, the image buffer is queried
for a value as '1' or '0' for each word.  If the value is '1', the
word remains uncompressed.  If the value is '0', a counter is
incremented for  CMYK, so that the plane can be restored within the
resolution image buffer.  There are 32 bits in each word, and there
are up to 32 words following the control register for each color
plane; with four color planes (words) representing the complete color
information for a pixel  with or without data and print drivers to
create the optimized form.

      Because the algorithm is elegant, it is very fast and can be
implemented quickly and cost effectively in hardware, allowing real
time compression/decompression of color information for high
bandwidth color transmissions (video, for instance).

The compression processing consists of the following steps:
  1.  Read the first scan line...