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:
Jul. 20, 1993
Filed:
Dec. 24, 1990
Jean-Swey Kao, Cerritos, CA (US);
Simon M Law, Torrance, CA (US);
Li-Fung Cheung, Alhambra, CA (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A new and improved decoder for decoding CCITT compressed image data. This decoder separates all the incoming codes into short codes and long codes. The short codes are sent to the short channel decoder and the long codes are sent to the long channel decoder. At each decoding cycle either the long channel decoder or the short channel decoder is active. The short channel decoder has a twin set decoder which decodes two short codes in parallel and guarantees two bits of decompressed data per decoding cycle. If the decoding of a first code generates a decompressed data of only one bit, then the decompressed data of a second code will be combined with the first decompressed data and the combination will be sent out. This process guarantees at least two bits of decompressed data per decoding cycle. The long channel decoder decodes the long intermediate codes which always generate at least four bits of decompressed data.