D9 (Formerly Digital-S)

A 1/2-inch digital tape format developed by JVC which uses
a high-density metal particle tape running at 57.8mm/s to record a video data rate of 50
Mbps. The tape can be shuttled and search up to 32x speed. Video sampled at 4:2:2 is
compressed at 3.3:1 using DCT-based intra-frame compression (DV). Two or four
audio channels are recorded at 16-bit, 48 kHz sampling; each is individually editable.
The format also includes two cue tracks. Some machines can play back analog S-VHS.
D9 HD is the high definition version recording at 100 Mbps.