Digital | ShopTalk KATC Transitions to HD With New Set, Graphics By Merrill Knox on Apr. 17, 2012 - 3:12 PM KATC, the ABC-affiliate in Layfayette, LA, began broadcasting in high definition this week from a brand-new set. The concept for the set design was a collaboration between KATC and AR&D, according to the station. The 5 p.m. ne ...