The data generation method according to one aspect of the present disclosure is a data generation method for generating video data that covers a second luminance dynamic range wider than a first luminance dynamic range and has reproduction compatibility with a first device that does not support reproduction of video having the second luminance dynamic range and supports reproduction of video having the first luminance dynamic range, and the data generation method includes: generating a video signal to be included in the video data using a second opto-electrical transfer function (OETF) to be referred to by a second device when the second device decodes the video data, the second device supporting reproduction of video having the second luminance dynamic range; storing, into video usability information (VUI) in the video data, first transfer function information for identifying a first OETF to be referred to by the first device when the first device decodes the video data; and storing, into supplemental enhancement information (SEI) in the video data, second transfer function information for identifying the second OETF.

Accordingly, a device that only supports reproduction of video having the first luminance dynamic range can reproduce video data using the first transfer function information, and a device that supports reproduction of video having the second luminance dynamic range can reproduce video data using the second transfer function information. Thus, in the data generation method, video data having backward compatibility can be generated.

For example, the data generation method may further include storing, into a descriptor of a multiplexing layer, hybrid information indicating whether or not the video data is video data covering the second luminance dynamic range.