Moving picture coding method, moving picture decoding method, moving picture coding apparatus, moving picture decoding apparatus, and moving picture coding and decoding apparatus

A moving picture decoding method for decoding a coded image included in a bit stream, the method comprising:

• performing context adaptive binary arithmetic decoding in which a variable probability value is used on, from among multiple types of sample adaptive offset (SAO) information that are included in the bit stream and used for SAO which is a process of assigning an offset value to a pixel value of a pixel included in an image generated by decoding the coded image, part of coded sao_type_idx indicating that the SAO is not to be performed, sao_offset indicating an absolute value of the offset value;
• and
• continuously performing bypass arithmetic decoding in which a fixed probability value is used on, from among the multiple types of the SAO information, (i) coded sao_band_position having a fixed length of 5 bits indicating a range of pixel values to which the SAO is applied and (ii) coded sao_offset_sign indicating whether the offset value is positive or negative, the sao_band_position being decoded after the sao_offset_sign is decoded,
• wherein a variable probability is not used in the bypass arithmetic decoding.