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:
Apr. 10, 2018
Filed:
Apr. 26, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
Hiroshi Oto, Kawasaki, JP;
Masaki Kitago, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An encoding apparatus includes a transformer which performs wavelet transform on image data to generate coefficients of subbands, and a predictive encoder which performs predictive coding on the coefficients. The predictive encoder includes a symbol generator which generates a symbol as an encoding target from a predictive error, an encoder which performs entropy coding on the generated symbol using a parameter determined in a process of encoding an immediately preceding coefficient of the coefficient of interest, an estimation unit which estimates a tentative symbol corresponding to a succeeding coefficient to be encoded next to the coefficient of interest, and a determination unit which determines a parameter for the succeeding coefficient from a code length obtained when assuming that the tentative symbol estimated by the estimation unit is obtained by encoding a parameter used when encoding the symbol of the coefficient of interest.