Patent ID: 8695051

Claim:
A distribution server configured to distribute a video to a client through a network, the distribution server comprising: a degraded video generation unit configured to generate a degraded video by causing a plurality of scenarios of quality degradation due to the network in the video in a pseudo manner; a video quality index value measurement unit configured to measure a plurality of first video quality index values according to a full-reference method by comparing the video with the degraded video; a characteristic data creation unit configured to create characteristic data of a plurality of first quality degradation values, obtained by causing the quality degradation to vary with the scenarios at regular intervals, and the first video quality index values corresponding to the respective scenarios; and a video quality index value calculation unit configured to receive a second quality degradation value in the video measured and transmitted by the client, and to calculate a second video quality index value, equivalent to a value according to the full-reference method, of the distributed video from the received measured second quality degradation value and the characteristic data.