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. 20, 2003
Filed:
Oct. 04, 1999
Tadayoshi Nakayama, Tokyo, JP;
Takeshi Yamazaki, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Disclosed is an arrangement for easily and quickly performing variable length coding for a multi-valued image, while estimating coding efficiency. To achieve the above objective, an encoding apparatus, which encodes a plurality of sets of multi-valued image data to produce code having variable lengths based on the multi-valued image data and a parameter k, comprises a bit shift unit for performing bit shifts for each of the multi-valued image data sets a different number of times in accordance with the parameter k and for outputting P sets of data, P accumulation adders for accumulating the P sets of data in correlation with the parameter k, for each of the multi-valued data sets, and comparators for comparing the results obtained by the accumulation adders to determine an optimal parameter k for each of the multi-valued image data sets.