| http://www.w3.org/ns/prov#value | - For example, assuming that a camera 1 is connected to a CCU 2 as illustrated in FIG. 1, three types of video signals, i.e., red, green and blue video signals R, G, B, four types of audio signals A1, A2, A3, A4, and a control signal D1 for controlling the CCU 2 are sent from the camera 1 to the CCU 2.
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