An effective advertising frame in a free viewpoint motion image is provided.;A distribution computer 51 distributes free viewpoint motion image data to each of user terminals 50AN1 to 50ANK. The user terminals 50AN1 to 50ANK create a motion image from the received free viewpoint motion image data and display the motion image. The user terminals 50AN1 to 50ANK extract history data of a focused region of the displayed image and transmit the history data to a stereoscopic advertising frame determination computer 52. The stereoscopic advertising frame determination computer 52 stores the history data for every user ID and every content ID and extracts a common region from focused regions of a plurality of users for each content ID to determine the region as a stereoscopic advertising frame.
