Patent ID: 8290047
Filing Date: 2012-10-16
Classification: A61B,H04N

Abstract:
1. A motion vector decoding apparatus for decoding a coded motion vector of a current block in a moving picture, comprising: a specifying unit operable to specify a neighboring block which is located in a neighborhood of the current block and is previously decoded; a determination unit operable to determine whether or not the neighboring block is decoded using a motion vector of another block; a deriving unit operable to derive a predictive motion vector of the current block using a motion vector of the neighboring block; and a decoding unit operable to decode the coded motion vector of the current block using the predictive motion vector; wherein, when (i) the determination unit determines that the neighboring block is decoded using the motion vector of the other block and (ii) the neighboring block is decoded using two motion vectors derived using the motion vector of the other block, one of which specifies a temporally forward direction and the other of which specifies a temporally backward direction, the deriving unit is operable to separately derive two predictive motion vectors of the current block, one of which specifies a temporally forward direction and the other of which specifies a temporally backward direction, using the two motion vectors derived using the motion vector of the other block, and two coded motion vectors of the current block are separately decoded using the two predictive motion vectors when performing the decoding of the coded motion vector of the current block.