05081450 is referenced by 108 patents and cites 13 patents.

Method and apparatus for converting multibit pixel data to a lesser number of bit pixel data and re-expanding the compressed data. Luminance data for each pixel is established as the 5 most significant bits of the original luminance signal. The chrominance information for groups of pixels is subsampled, and a common chrominance value assigned to each of the pixels in a group. The resulting compressed pixels may be 8 bits wide providing economical possibilities to store the 8 bit wide data. The data is expanded for display by adding lower order data bits to the compressed luminance signal data bits. A subsampled chrominance data signal is appended to the expanded luminance data for display.

Title
Apparatus and method for compressing and expanding multibit digital pixel data
Application Number
7/491370
Publication Number
5081450
Application Date
March 9, 1990
Publication Date
January 14, 1992
Inventor
Jesus A Saenz
Greenwich
CT, US
Darwin P Rackley
Boca Raton
FL, US
Bruce D Lucas
Yorktown Heights
NY, US
Agent
Pollock Vande Sande & Priddy
Assignee
International Business Machines Corporation
NY, US
IPC
G09G 5/00
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