US Patent 7884743 Arithmetic decoding device

Disclosed herein is an arithmetic decoding device including: an arithmetic decoding unit configured to decode coded data resulting from arithmetic coding on a basis of a context variable indicating a probability state and a most probable symbol; a plurality of arithmetic registers configured to supply the context variable to the arithmetic decoding unit and retain a result of operation by the arithmetic decoding unit; and a plurality of save registers configured to save contents retained in the arithmetic registers.