More colors . Currently, decoders only allow for a black background, and seven foreground colors. The standard allows for considerably more, but mandates at least those eight.
Viewer controls over fonts and colors.
For example, consumers can adjust the size of the caption text so that people with visual impairments can make the captions bigger and people who want less of the picture covered can make the captions smaller. Similarly, viewers will be able to specify a font and color for the captions. Captioners will choose all of these attributes for the captions, but consumers will be able to override them. Edged letters , which can provide a border or a dropshadow around each letter rather than placing them on a solid-color background. The ability to specify transparent or translucent backgrounds is optional.