| 摘要 |
The image coding apparatus comprises: a decoding unit 102 which decodes first coded data to generate a decoded picture and decoding information containing motion vectors; a coding unit 104 which codes, in a second coding scheme, the decoded picture generated by the decoding unit 102, to generate second coded data including a coded picture and coding information containing motion vectors; a basic motion information generating unit 105 which generates basic motion information from either the decoding information or the coding information which has been selected based on a coding condition indicating a picture type of a current decoded picture to be coded by the coding unit, wherein the coding unit 104 determines a search range for estimating motion vectors of the current decoded picture, according to the basic motion information generated by the basic motion information generating unit 105, and estimates motion vectors of the current decoded picture in the determined search range.
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