VIDEO DATA DISTRIBUTION CONTROL METHOD, DEVICE, SYSTEM, AND PROGRAM

摘要

A video data distribution device (101) multi-cast or broad-cast distributes moving picture data of the same video, the same coding method, the same frame configuration but having different compression ratios at least one different session according to the compression ratio or the video frame and the video block type and controls to notify session information or secret information on the distribution data to a receiver according to the video quality permitted for the receiver to receive. A video data reception device (108) uses the notified session information or the secret information so as to select encoded data from the normally received encoded data from at least one session, according to the video quality, and decode it.