Patent ID: 8687696
Filing Date: 2014-04-01
Classification: H04N

Abstract:
1. Coding method by picture blocks of a sequence of video pictures carrying out, at the level of a macroblock pair, selection of a coding mode from a field mode or a frame mode depending on whether it relates respectively to a single field or to two fields, the macroblock coding of a bi-predictive type picture using at least two reference pictures, wherein the field mode or the frame mode is selected according to the following steps: determination of a motion vector associated with a co-located macroblock of a macroblock to be coded and being located in the next reference picture, the macroblock to be coded being predefined, for the selection, in field or frame mode, scaling of the motion vector according to the temporal distances between the reference pictures corresponding to this motion vector and between the current picture, field or frame according to the predefined mode, and a reference picture chosen from among the reference pictures corresponding to this motion vector, determination of the temporal macroblock in the chosen reference picture, designated by the scaled motion vector attributed to the macroblock to be coded, and of its coding mode, field or frame, selection of the field or frame coding mode of the temporal macroblock designated by the scaled motion vector for the coding of the current macroblock.