Content delivery system for delivering content that changes on the time axis, content delivery server, the log collection server, the content relay server, user terminal, content viewing state grasping method, content providing method and recommendations how

摘要

The present invention, contents including a communication network connected to the user terminal having a content delivery server for delivering content that changes on the time axis, a reproduction means for reproducing the content and said user terminal and the content distribution server In the distribution system, the multiple packets of the same content, and a delivery means for delivering the content flag for the acquisition of viewing information of the terminal is added, to the user terminal, the content delivery server, play sometimes, when it detects the flag, and is configured to, characterized in that the content distribution server, and a flag detection signal transmission means for transmitting a flag detection signal is a signal indicating that it detects a flag.