"Audio description" . "audio description for the blind and partially sighted" . "DVS" . "Audio Description Services" . "Audio Describer" . "Descriptive Video Service" . . "Audio Description" . "audio narration track" . . "audiodescripted" . . "audio description" . . . "Audio description#Descriptive Video Service" . "Video description" . "descriptive video" . . . . "described video" . "AD" . . "Audio description" . .