Abstract: A content delivery system includes a content management element for managing one or more of contents, a multicast delivery element for delivering a multicast stream of the content or contents, a unicast delivery element for delivering a unicast stream of the content or contents, and a terminal. In response to a delivery request, the content management element transmits to the terminal, first information identifying the multicast delivery element and second information identifying the unicast delivery element. The terminal receives and reproduces a multicast stream corresponding to desired content according to the first information. When special reproduction is requested, the terminal requests the unicast delivery element to perform the special reproduction according to the second information. In response to the request for special reproduction, the unicast delivery element delivers the unicast stream for the special reproduction to the terminal.