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why does the person need to stand up?

I didn't understand anything of this.. Could you please explain... By the way what those numbers all about ?

@Sachin G Kulkarni this is an image from a patent application held by sony. typically in these application images, they use these numbers to point out different elements of an image and later mention what they mean in the legends somewhere. for example, 1510 here refers to the TV content while 1514 refers to the TV commercial. this is most likely a connected tv ad tech where a sony tv listens to the user saying "mcdonalds" and then skips the comemrcial. this helps sony attribute the ad views as "engaged views" making it more valuable for the advertiser (mcdonald's in this case).