Method and apparatus for block coding vertical mode codes for enhanced compression of image data
CA 1290852 C · Owner: Henderson, Alex · Inventors: Henderson, Alex; Drain, Frederick L.; Roberts, Larry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
METHOD AND APPARATUS; FOR BLOCK CODING VERTICAL MODE CODES FOR, ENHANCED COMPRESS ION OF IMAGE DATA ABSTRACT OF THE DISCLOSURE, A method and apparatus for improving the performance of data compression processes such as rela-, tive address coding, CCITT standard facsimile processes, and similar two-dimensional image coding processes by block coding one or more of the vertical mode codes produced by these processes. The performance of data compression processes is improved by representing one or more sequences of vertical mode code words with a single block code word. A reference scan line is preferably selected from among a plurality of previous scan lines, for example, the immediately …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.