This multiplexing may be incorporated at the system level; for example, in {HEAD ~ the preferred embodiment} for {TAIL ~ HDTV}, the preset pattern is specified to be contained in the field sync pattern 270, and the multiplexing is performed in the mux 230 as part of the overall system operation, as shown in FIG 2 
This multiplexing may be incorporated at the system level ; for example , in { HEAD ~ the preferred embodiment } for { TAIL ~ HDTV } , the preset pattern is specified to be contained in the field sync pattern 270 , and the multiplexing is performed in the mux 230 as part of the overall system operation , as shown in FIG 2
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