Patent ID: 11006116

Abstract:
The present principles relate to a method an device for context-adaptive binary arithmetic coding/decoding a sequence of binary symbols representing a syntax element related to picture data belonging to a picture block. Said method comprising, for each binary symbol of the sequence of binary symbols: —determining (110) a context according to the size of the picture block and the binary symbol to be coded; and —arithmetic-coding/decoding (120) said binary symbol taking into account said determined context; characterized in that said determining (110) of a context comprises: —when the size of said picture block is a power of 2, determining (910) a context according to the size of said picture block; and —when the size of said picture block is not a power of 2, determining (920) a context according to a block size immediately higher or lower than the size of said picture block, said block size being equal to a power of 2.