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:
Sep. 17, 2013
Filed:
Jan. 29, 2008
Toshio Sakurai, Kawasaki, JP;
Toshio Sakurai, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This invention makes it possible to use an inexpensive memory as the line memory of a decoding circuit. To do this, a command comparator separates compressed data into a first command that requires memory access and a second command requires no memory access. A decoder requests memory read of decompressed data necessary for decompression of the first command, decodes the first command based on the decompressed data, and requests memory write of decompressed data obtained by decoding. A RAM access controller controls read and write of a RAM cache and a line memory and executes memory read and memory write corresponding to a request from the decoder.