MPEG IMX was developed in 2001 as part of the Digital Betacam format. Digital video uses H.262/MPEG-2 Part 2 encoding at a higher bitrate than the Betacam SX, 30 Mbit/s or 40 Mbit/s or 50 Mbit/s. This format stores video using a 4:2:2 colour space.
The tapes come in small and large sized cassettes and are a muted green with IMX label. S tapes will hold up to 60 minutes and L tapes will hold up to 184 minutes.