Short answer

Turn off 'Shadowplay', by disabling 'Share' in Nvidia Geforce Experience.

Slightly longer answer

Shadowplay is an Nvidia feature that will let you record and stream your gameplay when you're fragging noobs in Call of Battle or Dutyfield. 

Since Resolume uses the graphic card extensively, Nvidia thinks Resolume is a game, and so it will put these icons in the output. You can turn sharing off without any negative side effects. It will actually improve performance.