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:
May. 05, 2009
Filed:
Oct. 30, 2007
Katsumi Otsuka, Kawasaki, JP;
Katsumi Otsuka, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A decoding apparatus for arithmetically decoding input coded data into symbol data by using a state variable and a context variable includes: a first decoding unit executes arithmetic decoding processing by using the state variable and the context variable and outputs first symbol data, and outputs the state variable and the context variable, which are updated by the arithmetic decoding processing, as a first state variable and a first context variable; and a second decoding unit executes arithmetic decoding processing by using the first state variable and the first context variable and outputs second symbol data, and outputs the first state variable and the first context variable, which are updated by the arithmetic decoding processing, as a second state variable and a second context variable. Whether to employ the second symbol data as a decoding result is determined based on the value of the first state variable.