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AssigneeCanon Kabushiki Kaisha
InventorsCHRISTOPHE GISQUET, GUILLAUME LAROCHE, PATRICE ONNO
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A method and a device for transforming a displacement vector component in the process of encoding or decoding a video. It applies more particularly to a mode of coding where a block of pixel is predictively encoded based on a predictor block pertaining to the same image. This mode of encoding a block of pixel is generally referred to as INTRA Block Copy mode. It proposes to take into account the particular constraints brought by the causal principle in the range of admissible values of the components of the displacement vector. In particular, for some values of one first component, the second component is transformed in order to improve the coding efficiency for it. Accordingly, the magnitude of the second component is reduced improving the coding of its value.
A method for decoding values of a first and a second component of a vector representative of the position in an image of a predictor block used to predict a current Coding Unit of the same image, wherein the method comprises:
A decoding device for decoding values of a first and a second component of a vector representative of the position in an image of a predictor block used to predict a current Coding Unit of the same image, wherein the decoder comprises:
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