DVB Steering Board OKs TTML-Based Next-Gen Subtitling Delivery Spec

​The DVB Steering Board approved a new next-generation subtitling delivery specification based on the World Wide Web Consortium’s Timed Text Markup Language (TTML) platform, DVB said in a Monday announcement. The new spec complements “bitmap”-based subtitling, which has been in use for more than 20 years, DVB said. TTML subtitles are “increasingly being adopted” by standards bodies, including ATSC and SMPTE, it said. The new spec “will allow service providers to transition over time to a common TTML subtitle format for both broadcast and internet delivered services,” it said. TTML subtitling for ATSC 3.0 is defined in the A/343 document, approved as a final ATSC 3.0 standard in December (see 1707180040).