Described video (DV) is also referred to as audio description (AD) or descriptive video. DV is a narrated description of a program’s main visual elements, such as settings, costumes, or body language. The description is added during pauses in dialogue and enables people to form a mental picture of the program.
For broadcast, DV is carried on secondary audio tracks. It can be enabled in your cable box audio settings. For web, DV is either enabled as a secondary audio track within the media player or is presented as ‘Open DV’, meaning the described video is part of the main soundtrack.
Check out examples on the Described Video Canada YouTube Channel.