ADAPTIVE PREDICTOR FOR HALFTONE OR LINE GRAPHICS
Original Publication Date: 1981-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
A compressor consisted of a predictor and encoder is described in Figure 1. I - PREDICTOR ENCODER - L I I Figure 1 In a conventional document consisting of text and line graphics, a delta predictor using previous line data is quite efficient to remove the line by line redundancy and hence improve the overall data compression ratio. The delta predictor is described in U.S. Patent No. 3,524,926 by T. Starr of Xerox Corporation.