There are five different tasks in the D-META Grand Challenge:

• AVRGR Recognize gestures addressed to the robot by means of the vision and the audio.
• AVSR Detect, localize and track multiple speakers using audio-visual information.
• CEP Estimate the level of engagement in a video-mediated communication.
• AVCGR Recognize conversational gestures in first encouter dialogues.
• AVFGR Recognize feedback gestures in first encouter dialogues.