A method of ordering bits in an N-bit status word (s[c]) adapted to
represent the state of a coefficient (c) during an entropic encoding of
the coefficient in several passes is adapted to modify the value of the
last bit N-1 of the status word (s[c]), representing the sign of the
status word (s[c]), according to the significance of the coefficient (c).
A method for the entropic encoding of a coefficient (c) in several
encoding passes using this status word (s[c]) comprises a step of
comparing the value of the status word (s[c]) with the value 0 in order
to determine whether a first condition is satisfied and a step of
applying the first encoding pass to the coefficient (c) when the first
condition is satisfied.