How to setup Onkyo ARC hdmi output to Smart TV pt2

What is ARC tv hdmi input? Samsung D7000 smart 3dtv to Onkyo amp setting up arc "audio return channel" tv to surround sound, this eliminates the need for connecting tv's audio out cables like optic cable or composite red/white audio cables going back into audio receiver tv or aux input, basically setting up ARC sends audio out from tv to receiver and when tv turns on the receiver will turn on too in sync with tv (if tv has no arc feature this won't work)