DVD
| DVD | Captioning | Subtitles (also called Subtitles for the Deaf) |
|---|---|---|
| Uses Line 21 standard—can be turned on and off | DVD track—can be turned on and off | |
| Requires decoder—built into TV and some overhead projectors (Epson 6100i) or external—computer requires software (e.g. WMP) | No decoder required—can be played on computer | |
| No menu structure required to turn on (decoder required) | Requires menu structure to turn on (unless the DVD player supports subtitles) | |
| Text-based | Text-based or image-based | |
| White text on dark background | No background, but stroke and fill controllable | |
| Roll-up or pop-on | Pop-on only |