A digital tape format which uses a 19mm helical-scan cassette tape to record uncompressed high definition television material at 1.88 GBps (1.2 Gbps). D6 is currently the only high definition recording format defined by a recognized standard. D6 accepts both the European 1250/50 interlaced format and the Japanese 260M version of the 1125/60 interlaced format which uses 1035 active lines. It does not accept the ITU format of 1080 active lines. ANSI/SMPTE 277M and 278M are D6 standards.