Patent ID: 8676935

Claim:
A content distributing system in which a content distributing server distributes streams of contents to a client through a network, a feature amount distributing server distributes an evaluation feature amount for each quality evaluation unit of said contents to said client, and said client decodes reproduction contents from the streams of said contents, evaluates a quality of said reproduction contents using said evaluation feature amount, calculates a quality evaluation value, and reports said quality evaluation value to a monitoring server, said feature amount distributing server comprising: a processing information generation unit which generates processing information to determine whether to execute processing for each quality evaluation unit; a feature amount extraction unit which extracts a content feature amount from said contents; a processing unit which processes said content feature amount and generates a processed feature amount; a selecting unit which selects said content feature amount or said processed feature amount according to said processing information and sets the selected feature amount as the evaluation feature amount; and a distributing unit that distributes said evaluation feature amount to said client, and said monitoring server comprising: a warning unit which collates the processing information generated by said processing information generation unit of said feature amount distributing server and the quality evaluation value received from said client, and gives a warning when the processing information and the quality evaluation value are mismatched with each other, wherein said processing unit generates the processed feature amount where said content feature amount is changed such that a quality evaluation value of normal reproduction contents is out of a quality reference and the processed feature amount is distributed to the client, and wherein said warning unit determines mismatching when said processing information indicates processing and said quality evaluation value is in the quality reference.