Does Apple TV work overseas, specifically in Korea?

I own an iPad 2, a Classic iPod, and a new Samsung Smart TV. Can I connect either of my i-devices to the TV? If so, what kind of connector do I need? Or, must I purchase a new iPad or iPod to connect to the TV? Does Apple TV work in Korea, or only in the US?

Apple HDMI-to-HDMI Cable 1.8m

Apple HDMI-to-HDMI Cable 1.8m

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