The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 05, 1976
Filed:
Jul. 17, 1975
David Curtis Van Voorhis, Los Gatos, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Apparatus for encoding ordinary run-length codes and run-length codes that have been extended to include two classes of code words, regular code words for runs and special code words for selected special situations. The encoder comprises table storage, select/combine circuitry, and shift-out circuitry. The table storage holds four small tables whose values can be adjusted to correspond to any ordinary or extended run-length code to be implemented. The select/combine circuitry accepts as input a binary value that uniquely identifies the desired code word, and combines this binary value with selected table values to calculate the desired code word. The code word bits are then outputted sequentially by the shift-out circuitry.