There is provided a structure of metadata which can express an object of a complicated shape. There are added vcr_shape_num indicating the number of sub-planar areas constituting an object area, vcr_rule_code indicating that an integration system to integrate the sub-planar areas and to determine a final object area is written, vcr_rule_length to indicate the length of data of the integration system, and data vcr_rule to indicate the integration system, and thereafter, vcr_subregion_data of data of each sub-planar area appearing in vcr_rule is described continuously by the number indicated by vcr_shape_num.