ESTIMATION OF THE PREDICTION MODE FOR THE INTRA CODING MODE

摘要

The method for the calculation of the prediction mode comprises the following steps: - calculation of the spatial gradients (3) according to different filtering operations for an already coded reconstructed zone of the image located in the neighbouring area of the current block, pre-selection of preferred prediction modes (4) from among coding modes based on predictors obtained from pixels at the immediate edge of the current block in the already coded reconstructed zone of the image, pre-selection based on a minimization of an energy level associated with each filtering relative to a spatial gradient. selection of the prediction mode (6), at least from among the pre-selected prediction modes, minimizing an energy level (5) corresponding to the prediction error on said zone located in the neighbouring area of the current block. Application to video data compression.