The invention relates to a method of encoding an input signal into an output bit stream (BS). Said method comprises steps of applying (1) a transformation to a block of values (BV) in order to get a transformed block (T), scanning (2) the coefficients (C1-C1) of a transformed block (TB) according to a coefficient scanning order, splitting (3) a scanned coefficient (Ci) into K groups of bits (Ci,1-Ci,K) such that at least a group of bits comprise at least 2 bits and such that said scanned coefficient (Ci) is the concatenation of the K groups of bits, entropy coding (4) a kth group of bits (Ci,k) using entropy codes into a kth entropy coded group of bits (ECi,k) and forming (5) a block bit stream (BBS) from the K entropy coded groups of bits of the scanned coefficients of the transformed block, said output bit stream (BS) comprising said block bit stream (BBS).