CEA-708

A US standard for digital closed captioning on digital television broadcasts and streaming, superseding the analog-era CEA-608 standard. CEA-708 supports richer presentation than its predecessor, including multiple fonts, colours, opacity, text positioning, and up to 63 caption service channels (enabling multiple languages). Despite this expanded feature set, authoring tools and production workflows still predominantly target the simpler CEA-608 feature set, meaning most captions in practice remain visually plain white text on black. The standard is maintained by the Consumer Technology Association (formerly CEA, now CTA) and is mandated by the US FCC for digital television.