In-vehicle information distribution system and image-contents distribution method of in-vehicle information distribution system

An image-contents distribution method of an in-vehicle information distribution system, the in-vehicle information distribution system including

• a plurality of image display devices that display a plurality of image contents transmitted from a ground communication device to a train,
• a communication device that is connected to an inter-vehicle communication path and an in-vehicle communication path and that relays information, and
• a central device that is connected to the communication device and an on-vehicle communication device within a same vehicle by the in-vehicle communication path and that manages information transmitted to the train, wherein
• the ground communication device includes a step of transmitting an image-contents-distribution management table in which identification information for uniquely identifying the respective image contents and the respective image contents are stored in a corresponding manner and the respective image contents to an on-vehicle communication device,
• the central device includes
• a step of storing therein the image-contents-distribution management table and the respective image contents that are received by the on-vehicle communication device,
• a step of determining an image display device that is to store therein image contents based on the image-contents-distribution management table, and
• a step of distributing image contents stored in the first image storage unit to a determined image display device, wherein
• each of the image display device includes
• a step of determining a location where image contents are stored based on the image-contents-distribution management table and
• a step of displaying image contents read from a determined location.