There is provided a data generation device including a content specifying unit configured to specify content, a period estimation unit configured to estimate a period in which the content specified by the content specifying unit attracts interest, and a metadata generation unit configured to associate as metadata the period estimated by the period estimation unit with the content. The scheduler includes a first level generator associated with groups of connections. After a user interface is selected, the user may select on of the operational modes. A preferred embodiment employs inter-connectable holders that each retain two DVD boxes in a side-by-side configuration. The processing can enhance signals such as images b denoising or interpolating missing samples.