×

Adaptive prediction for binary encoded documents containing a mixture of text, line drawings and halftones

  • US 4,559,563 A
  • Filed: 10/11/1983
  • Issued: 12/17/1985
  • Est. Priority Date: 10/11/1983
  • Status: Expired due to Term
First Claim
Patent Images

1. A system for adaptively predicting a block of image data comprising:

  • a plurality of predictors, each using a different predictor pattern for predicting the data bits of each image data block,a comparator for each predictor for generating an error code representative of the accuracy of the predictions made,selector means for selecting one of the predictors, based on its performance on one or several previous data blocks, andmeans responsive to the output of said selector means for outputting the error code for the current block using the selected predictor.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×