PQ Media Reports Double-Digit DOOH Growth Defying economic and political headwinds worldwide, digital out-of-home (DOOH) media operators ground out a 9.3% revenue gain to $8.86 billion in 2013, a solid increase tempered by it being the third straight year of slower growth, according to PQ Media's annual performance benchmark. Key first-half indicators point to DOOH growth accelerating to 11.3% in 2014 boosted by a dynamic combination of the global economy gaining momentum, two sporting mega-events, and increased healthcare, political and transit ad spend, says the new Global Digital Out-of-Home Media Forecast 2014-18.