| http://www.w3.org/ns/prov#value | - A method of receiving image signals according to claim 13, wherein said identification signals include identification of a transmitter to be transmitted said first and second image signals and a frame number for each of said first and second image signals, a first frame signal of said first image signal is denoted by Ln, n being an integer indicative of a frame number such as 1, 2, 3, . . . n, a s
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