WST Subtitles World System Teletext subtitles. DVB Subtitles Digital Video Broadcasting Subtitles [ETSI EN 300 743]. DVB Subtitles (bitmaps) DVB subtitling service containing object_data_segment{}s with object_coding_method=0x00. DVB Subtitles (characters) DVB subtitling service containing object_data_segment{}s with object_coding_method=0x01.