Patent ID: 8345762

Claim:
Method as part of a process of coding or decoding video signal for deriving coding information for at least one picture part of a high resolution picture comprising high layer macroblocks from coding information of at least one picture part of a low resolution picture, each picture being divided into non-overlapping macroblocks, wherein, said coding information of the at least one picture part of the low resolution picture comprising at least partitioning information for splitting a macroblock into sub-blocks, at least one base layer macroblock of said at least one low resolution picture part is associated with each high layer macroblock of said at least one high resolution picture part so that said associated base layer macroblock overlays at least partly each high layer macroblock when said at least one low resolution picture part upsampled by a first predefined ratio in a horizontal direction and a second predefined ratio in a vertical direction is superposed with said at least one high resolution picture part and wherein said method comprises the following steps: computing geometrical parameters for each high layer macroblock in said at least one high resolution picture part representative of a position of each high layer macroblock relatively to corresponding base layer macroblock(s) associated with each high layer macroblock; and deriving partitioning information for each high layer macroblock in said at least one high resolution picture part from partitioning information of the corresponding base layer macroblock(s) on the basis of said geometrical parameters wherein a high resolution picture coordinate system being associated with each high resolution picture, four geometrical parameters are computed for each high layer macroblock divided into non-overlapping blocks, in said high resolution picture coordinate system as follows: a first geometrical parameter is a first algebraic distance MbBorderX between a high layer macroblock center and a nearest vertical border of corresponding base layer macroblock(s), said first distance being defined according to a first direction; a second geometrical parameter is a second algebraic distance between the high layer macroblock center and a nearest horizontal border of corresponding base layer macroblock(s), said second distance being defined according to a second direction; a third geometrical parameter is a third algebraic distance between the high layer macroblock center and a nearest vertical border of a block of corresponding base layer macroblock(s), said third distance being defined according to said first direction; and a fourth geometrical parameter is a fourth algebraic distance between the high layer macroblock center and a nearest horizontal border of a block of corresponding base layer macroblock(s), said fourth distance being defined according to said second direction.