Analyze ATSC CS/343 Captions and Subtitles and consider developing standards, bulletins or technical reports. Oversee the development of test files conforming to ATSC CS/343, CS/331 and DASH-IF ATSC Profile including corresponding video and audio content as well as DASH MPD and MMT files. Document discrepancies with decoding and presentation on the DASH-IF reference decoder, DASH.js.