Motion image distribution system, motion image distribution method, server for motion image distribution system, and user terminal for motion image distribution system

A motion image distribution system comprising:

• a server generating, upon receiving motion image encoded data obtained by encoding motion image data, first structure information representing a data structure of the motion image encoded data on the basis of received motion image encoded data, and upon authenticating the motion image encoded data as regular data by using the first structure information, transmitting the first structure information and the motion image encoded data;
• and
• a user terminal receiving the first structure information and the motion image encoded data from the server, generating second structure information representing the data structure of the motion image encoded data on the basis of received motion image encoded data, when the generated second structure information is identical to the received first structure information, authenticating the motion image encoded data as regular data, and playing back the motion image encoded data;
• wherein
• the server holds a database including a collection of structure information representing various kinds of motion image encoded data as regular data, when the generated first structure information is identical to one of a plurality of structure information stored in the database, authenticates received motion image encoded data as regular data, and transmits the first structure information and the motion image encoded data to the user terminal.

A server comprising:

• an information generation unit, upon receiving motion image encoded data obtained by encoding motion image data, generating structure information representing a data structure of the motion image encoded data on the basis of received motion image encoded data;
• a database storing a collection of a plurality of structure information representing various kinds of motion image encoded data as regular data;
• an authentication unit authenticating the motion image encoded data as regular data when structure information received from the information generation unit is identical to one of the plurality of structure information stored in the database;
• and
• a transmitting unit, when the authentication unit authenticates the motion image encoded data as regular data, transmitting the structure information received from the information generation unit and the motion image encoded data to a user terminal.

An user terminal comprising:

• a receiving unit receiving first structure information representing a data structure of rearranged motion image encoded data obtained by rearranging a plurality of encoding type information representing encoding type information of motion image encoded data obtained by encoding motion image data, and the rearranged motion image encoded data from a server, and receiving encoding information obtained by rearranging the plurality of encoding type information in a regular array from the server;
• an information generation unit generating second structure information representing the data structure of the rearranged motion image encoded data on the basis of the rearranged motion image encoded data received by the receiving unit;
• an authentication unit, when the generated second structure information is identical to the received first structure information, authenticating the motion image encoded data as regular data;
• and
• a playback unit, upon authenticating the motion image encoded data as regular data, rearranging the plurality of encoding type information of the rearranged motion image encoded data in a regular array by using the encoding information to generate the motion image encoded data, and playing back the motion image encoded data.