METHOD AND DEVICE FOR ARITHMETIC ENCODING/DECODING

摘要

PROBLEM TO BE SOLVED: To accelerate the decoding speed of an encoded multilevel image using hardware having simple configuration. SOLUTION: For the arithmetic encoding/decoding method for arithmetically encoding/decoding multilevel image information composed of plural bit planes while referring to context information, the encoding/decoding order is determined, so that the context information corresponding to an encoding/decoding object pixel can be determined while preceding for at least two cycles of the encoding/decoding object pixel.