| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWINGS Two embodiments of the invention are illustrated, by way of example, in the accompanying drawings, in which: FIG. 1 is a waveform illustrating the invention; FIG. 2 is a block diagram illustrating the described invention; FIG. 3 is a block diagram of an encoder circuit forming part of a color television transmitter in accordance with a first embodiment of the inve
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