Patent ID: 8654850
Filing Date: 2014-02-18
Classification: H04N

Abstract:
1. An image coding device which codes an input image signal to generate an output coded signal, said image coding device comprising: a signal division unit configured to divide each of pictures included in the input image signal into plural images to be coded; plural coding units each of which corresponds to one of the plural images to be coded and is configured to code the corresponding one of the plural images to be coded to generate a coded signal, and to code and decode the corresponding one of the plural images to be coded to generate a locally decoded image, the coding including motion compensation; and a signal combining unit configured to combine plural coded signals generated by said plural coding units to generate the output coded signal, wherein said signal division unit is configured to determine, as a search range to be used for the motion compensation by each of said plural coding units, a range including (i) one of the plural images to be coded corresponding to said coding unit and (ii) an overlap region which is adjacent to the one of the plural images to be coded and is included in another one of the plural images to be coded that is adjacent to the one of the plural images to be coded, each of said plural coding units is configured to perform the motion compensation using a first locally decoded image of the corresponding one of the plural images to be coded and a second locally decoded image of the overlap region, the first locally decoded image being generated by said coding unit, the second locally decoded image being generated by another one of said plural coding units, and the corresponding one of the plural images to be coded and the overlap region being included in the search range, and said signal division unit is configured to change a size of the overlap region according to a predetermined condition.