Digital-S
Magnetic cassette tape | |
| Encoding | NTSC, PAL |
|---|---|
| Standard | Interlaced video |
| Usage | Video production |
D-9 or Digital-S as it was originally known, is a professional
videocassette format created by JVC
in 1995.
It is a direct competitor to
Fox News Channel,[3]
but was a commercial failure compared with Digital Betacam. It was superseded by high definition tapeless formats.
Technical details
D-9 uses a tape shell of the
standard-definition resolutions, in either 4:3 or 16:9 aspect ratios. Audio is recorded as 16-bit/48 kHz PCM with up to four separate channels.[4] The tape is 1/2 inch wide, the helical scan head drum is 62 mm in diameter, and the video tracks, which are read by the video heads in the head drum, are 20 microns wide.[5] Video quality is generally very high; at standard definition, D-9's quality is comparable with Digital Betacam.[6]
The BR-D51U model is additionally capable of analogue S-VHS playback.
HD recording
For
HDCAM SR; no objective tests were made comparing these formats. It is not clear whether this proposed format was ever manufactured or sold.[8]
Additional information
Although D-9 uses the same video codec as
DVCPRO achieves bitrate parity with D-9 and D-9 HD, but has a slower tape speed, making it less reliable. Some of the D-9 television studio gear is capable of recording with Sel-Sync or pre-read and is provided with four-channel audio like Digital Betacam. Serial digital interfaces (SDI) are also provided. A dockable recorder, the JVC BR-D40, attached to a variety of cameras, and there was a one-piece camcorder, the JVC DY-70U.[9]
References
- ^ "D-9: Introduction to the format"
- ^ "D-9 / Digital-S video digitised & transferred to FFV1, MOV & MP4". The Great Bear. Retrieved 2024-02-13.
- ^ "D-9 in action worldwide"
- ^ "D-9 technical specifications" Archived 2007-10-23 at the Wayback Machine, Displays general D-9 technical specifications. Accessed October 13, 2007.
- ISBN 9781136024184– via Google Books.
- ^ "JVC Professional Japan"
- ^ "D-9 HD Technical Specifications"
- ^ "D-9 HD[VIEW]". pro.jvc.com. Retrieved 2015-11-11.
- ^ "JVC" (PDF). JVC.