IVC videotape format
Magnetic Tape | |
| Encoding | NTSC, PAL |
|---|---|
| Standard | Interlaced video |
| Developed by | International Video Corporation |
| Usage | Video production |
IVC 2 inch Helical scan was a high-end
2 inch Quadruplex videotape format but with the advantages of helical scan. They then developed a VTR using this technology, the IVC Model 9000.[2] [3]
Versions
- IVC made the Model 9000 in five versions[4]
- ionlamb.us IVC VTR list
- IVC 9000 (NTSC and PAL unit, could record for 2 hours on one 10.5 inch reel)
- IVC 9000-4 (4 ips tape speed, Long Play, could record and play back 4 hours on one 10.5 inch reel
- IVC 9000-W (8 MHzrecord and playback for super bandwidth)
- IVC 9000-M (could record and playback video in the 655-line/48 field per second (24 frame/s) video standard)
- IVC 9000-W-M (An IVC 9000-M with options from the 9000-W added to it, enabling both 8 MHz wideband video recording and 655/48 capability)
The Helical scanner used a tape wrap of 188.57 degrees around a drum of 3.170 inches in diameter, with two play/
- All models had:
- Two analog audiochannels
- One cue track
- One control track
- Time codetrack
- Capstan-driven tape speed of 8 inches per second (10.5 inch reels)
- Analog color timebase corrector(TBC)
- video tapeis missing momentarily, caused by a defect in the tape)
- Two
- Other Spec:
- Vacuum tape tension columns
- Vacuum grip capstan
- Weight of 1300 pounds (600 kg)
- Power feed of 230 V at 3000 watts
- One second lock up time, stop to play
- a 1500-hour head warranty (for the 9000-4 models, a 3000-hour warranty)
- Signal-to-noise ratio > 48 dB
The 9000 was one of the first
analog video recorders utilized for electronic film production using analog high-resolution wideband video standards (such as the 655/48 standard mentioned previously), predating DI (digital intermediate
) film production systems in use today.
The 9000-W-M was, for all intents and purposes, a custom pre-
special effects
.
The 9000, in its regular 525-line & 60-field-per-second NTSC configuration, was also used for mastering some of the first
Discovision in 1978 due to the format's high quality. However, Discovision abandoned the format a few years later in favor of 1" Type C videotape
, due to service & support for the 9000 machines becoming unavailable after IVC went out of business in the early 80s, and also due to the growing industry support for the newer 1" Type C format.
The picture quality was excellent, but unfortunately, the IVC-9000 did not have many sales (only 65 units were sold by IVC). Shortly after it came out, both the
1" Type C
formats of VTR came out. Both used less costly tape, and made just about as good of a picture.
- Ampex in 1961 made a 2 inch helical scan VTR for a short time, the VR-8000. They also produced another 2" helical VTR, the VR-660, in 1963.
- Sony also made a 2 inch Helical scan VTR, but it was non-segmented and they sold even fewer of them (in the early 1970s).
IVC 800 series 1 Inch VTR
IVC 800 series 1 Inch VTR was very popular. 800 series are
reel-to-reel
helical 'mid band' color portable TVR using 1 inch/25mm tape running at 17.2 cm per second/6.77 inches/second.
See also
- 1 inch type B videotape
- 1 inch type C videotape
- 2 inch Quadruplex videotape
- Helical scan
- Videotape
- VTR
References
- ^ a b "DC Video". DC Video. Retrieved 2022-04-20.
- ^ lionlamb.us B&W Photo IVC 9000
- ^ Lab Guys World IVC Memories
- ^ :Lab Guys World's IVC 9000
- ^ DC Video IVC 9000
- ^ Lab Guys World IVC list
- ^ Labguysworld.com IVC 9000 page 2