Sub-picture data is a concept peculiar to DVD, and consists of defining data, such as subtitles, menus, and karaoke lyrics, which is overlaid as a bitmap onto the main video content. This data is compressed using run-length encoding. Up to 32 streams of sub-picture data can exist for each title. Sub-picture streams are distinguished by attributes such as language.

Не порекомендуете ли глоссарий по DVD?

Спасибо.