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:
Dec. 09, 2014
Filed:
Sep. 26, 2011
Mitsuhisa Ohnishi, Osaka, JP;
Masayuki Yamaguchi, Osaka, JP;
Takahiro Morishita, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
The present invention provides an image encoding device that can balance encoding at a high compression ratio and restoration of a high-quality image by decoding in a short processing time. Compression mode determination meansdetermines a compression mode to be one of DPCM and PCM based on target pixel data inputted from a terminaland predicted data calculated by a predetermined method. For the DPCM, DPCM compression meanscompresses a difference value between the target pixel data and the predicted data to DPCM encoded data having a predetermined DPCM code length. For the PCM, PCM compression meanscompresses the target pixel data to PCM encoded data having a PCM code length determined by PCM code length determination means. The PCM code length determination meanscalculates the PCM code length for each piece of target pixel data such that a total of post-encoding code lengths becomes an allowable value or less in a unit of predetermined pixel group among the plurality of pixels. Tag/code output meansoutputs the encoded data by adding a tag indicating whether the compression mode is the DPCM or the PCM to the encoded data.