Patent ID: 9247252
Filing Date: 2016-01-26
CPC Classification: H04N

Claim Text:
1. An image decoding device that subjects an input encoded stream to variable-length decoding, inversely quantizes and inversely transforms the encoded stream into a predicted difference image in a decoding target coding unit, adds up the predicted difference image with a predicted image, and outputs an image, the image decoding device comprising: a CU dividing unit configured to determine a division size of the decoding target coding unit; and a CU-size storing unit configured to store the division size of the decoding target coding unit, wherein the CU dividing unit predicts the division size of the decoding target coding unit, without using coding unit size information extracted from an encoded bit stream, by using size information of peripheral encoded coding units in the same picture and size information of encoded coding units in preceding and following pictures stored in the CU-size storing unit.