Symbol 5634-2 from IEC 60417 - Title/Meaning: Three component video output, digital Function/description: To identify controls and connecting terminals specifically meant for digital three component video output.
Additional information: 
Published in: Supplement O, 1996,3C/293/DIS
Own work using: iso.org/obp/graphics/grs/adc378ae-e2b3-4a01-af25-32b13d06cd4c 200.png
Vectorization:  Mrmw