Image decoding apparatus and image decoding method

Details Image decoding apparatus and image decoding method Image decoding apparatus and image decoding method

2007-05-02

2011-12-06

Mehta, Bhavesh (Department: 2624)

Image analysis

Image compression or coding

Including details of decompression

C382S232000, C382S236000, C382S238000, C375S240010, C375S240120, C375S240150

Reexamination Certificate

active

08073269

ABSTRACT:
An image decoding apparatus obtains the prediction error or a restored image of the encoding object image by inverse processing of the encoding processing of encoded image data encoded by motion compensation predictive coding, in which a restored image is obtained by adding the prediction error and a reference image, a reduced size image of the restored image is generated and stored along with the restored image; wherein, when an image is encoded by an encoding mode that uses reference pixels that include two times or more number of pixels of a region of a predetermined number of pixels, a reference image is obtained by reading out and expanding the stored reduced size image of the restored image, and when an image is encoded using reference pixels of less than two times a number of pixels of the predetermined number of pixels, the reference image is obtained from the stored restored image.

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patent: 2001/0012402 (2001-08-01), Ozaki
patent: 2007/0195882 (2007-08-01), Tichelaar et al.
patent: 9-252469 (1997-09-01), None
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patent: WO 2005/088983 (2005-09-01), None
Office Action issued Oct. 12, 2010 in JP Application No. 2006-130667.

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