Patent ID: 8302203

Claim:
A content transmission system comprising a plurality of communication terminals that can be individually identified and a transmission server connected to a communication network to which the communication terminals belong, the content transmission system comprising: the transmission server including a determination module configured to determine whether content is a copyrighted content with an established copyright; a set up module configured to set up access address information comprising information specifying a memory region where the content determined to be copyrighted content by the determination module is stored; a reception module configured to receive delivery requests requesting delivery of content from the communication terminals; and a transmission module configured to transmit the copyrighted content and an applicable access address information, in accordance with the delivery request, and the communication terminals include a request module configured to transmit the delivery requests to the transmission server; an information acquisition module configured to acquire from the transmission server, in accordance to the delivery requests, copyrighted content and the applicable access address information; a storing module configured to associate and store the copyrighted content acquired by the information acquisition module with access address information; an operation unit configured to receive a selection of the copyrighted content or a non-copyrighted content stored at the storing module for transmission to another communication terminal; a determining unit configured to determine whether the content selected for transmission is the copyright protected content or the non-copyright protected content; and a transmission module configured to transmit the access address information stored in the storing module and not the copyright protected content to the another communication terminal when the determining unit determines that the selected content is the copyright protected content, and to transmit the non-copyright protected content to the another communication terminal when the determining unit determines that the selected content is the non-copyright protected content.