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. 19, 1993
Filed:
Jul. 30, 1991
Peter Ruetz, Redwood City, CA (US);
Po Tong, Fremont, CA (US);
LSI Logic Corporation, Milpitas, CA (US);
Abstract
A structure and a method are provided for fast-decoding a Huffman code using means for recognizing the number of leading 1's in the Huffman codeword up to a predetermined maximum, and means for removing from the Huffman codeword the number of leading 1's recognized. In one embodiment, both JPEG Huffman code AC and DC tables are stored in a random access memory (RAM). In that embodiment, to access the AC code tables, an address is formed by the number of leading 1's recognized and the portion of Huffman code with the number of leading 1's recognized removed. To access the DC code tables, an address is formed by a predetermined code pattern and the Huffman codeword.