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:
Jun. 30, 1981
Filed:
Apr. 20, 1979
Kazumoto Iinuma, Tokyo, JP;
Nippon Electric Co., Ltd., Tokyo, JP;
Abstract
Code converting circuits for facsimile and other information communications systems in which run length codes are converted to codes having variable lengths and the variable length codes are converted into a word code train, wherein each word comprises N bits, and the converted word code train is stored or transmitted. The code converting circuit consists of a code converter for converting parallel input codes (run length codes of fixed lengths) into variable length codes, a multiplexer and shift register for converting the variable length codes (and dummy codes where needed) into word length codes of fixed length, a multiplexer for outputting the word length codes to a memory interjecting a synchronizing code at predetermined intervals, and control signal generating circuitry for controlling the various circuit components. A decoding circuit is also disclosed for reconstructing the original run length codes from the word length codes. In addition, a second embodiment is disclosed which uses a parallel signal processing technique and is particularly adapted for encoding and decoding television video signals.