3. The method of claim 1 , wherein: providing the mapping table comprises: selecting the mapping table from a plurality of candidate mapping tables according to a coding context, wherein the coding context is derived from a previously coded syntax element value; and providing the probability table comprises: selecting the probability table from a plurality of candidate probability tables according to the coding context.
5. The method of claim 3 , wherein selecting the mapping table and selecting the probability table are performed only when a predetermined criterion is satisfied.