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Encyclopedia > IVC 2 inch Helical scan

IVC 2 inch Helical scan is a high end analog Helical scan VTR first shown in 1975. IVC had made a number of 1 inch Helical VTRs. IVC saw a chance to make a VTR that would have the quality of the 2 inch Quadruplex videotape recorder but with the advantages of helical scan. Look up analog, analogue in Wiktionary, the free dictionary. ... The head drum of a Hi-Fi NTSC VHS VCR; three of the six heads face the reader. ... A video tape recorder (VTR), is a tape recorder that can record video material. ... 1975 (MCMLXXV) was a common year starting on Wednesday. ... 2 inch Quadruplex (also called 2″ Quad, or just quad, for short) was the first practical and commercially successful videotape format. ...

  • IVC made the Model IVC 9000 in four versions:
    • IVC 9000 NTSC and PAL unit, could record for 2 hours on one 10.5 inch reel.
    • IVC 9000-4 4 ips, Long Play, could record and play back 4 hours on one 10.5 inch reel
    • IVC 9000-W 8Mhz Record and playback for super bandwith.
    • IVC 9000-M Record and Playback 655/48 video. 655 line and 48 field and 24 frames.

The Helical scan wrapped 188.57 deg. around a drum of 3.170 inches in diameter with two play/record heads. In NTSC is had 5 segments per fields and 6 in PAL. With 57 lines per segment. The VTR had a color monitor,a Wave Form Monitor-WFM scope and vectorscope. The references in this article would be clearer with a different and/or consistent style of citation, footnoting or external linking. ... Television encoding systems by nation PAL, short for Phase Alternating Line, is a colour encoding system used in broadcast television systems in large parts of the world. ... A megahertz (MHz) is one million (106) hertz, a measure of frequency. ... A recording head is the physical interface between a recording apparatus and a moving recording medium. ... A video vectorscope displaying color bars. ...

  • All models had:
    • Two Audio channels
    • One cue track.
    • One Control track
    • Time code track
    • Capstan Tape speed 8 inches a second (10.5 inch reel)
    • Analog color TBC-Timebase correction
    • Dropout compensation: Replaced snowy video spots where the FM signal on the tape is missing momentary, caused by a defect in the tape.
  • Other Spec:
    • Vacuum tape tension columns
    • Vacuum grip capstan.
    • Weight 1300 pounds
    • Power 230v - 3000watts
    • One second lock up time
    • a 1500 hour head warranty (9000-4 3000h)
    • Signal-to-noise ratio-S/N >48db

The IVC 9000-W 8Mhz Record and playback for super bandwith could be add to the IVC 9000-M Record and Playback 655/48 video, 655 line and 48 field and 24 frames option. The made one of the first DI VTRs. This was a custom pre HDTV video System. The 655 line system also used for 24 Frame playback to TVs used on Movie studio sets. Thus the TVs had no flicker due to different frame rate. Audio can mean: Sounding that can be heard. ... Timecode is also the title of a 2000 film directed by Mike Figgis which was shot in one continuous take. ... Nautical capstan A capstan is a rotating machine used to control or apply force to another element, usually linear. ... Timebase correction is a technique to reduce or eliminate errors present in all analog recordings on mechanical media, including video tape recorders and videocassette recorders, caused by mechanical instability. ... Bottom view of VHS videotape cassette with magnetic tape exposed Videotape is a means of recording images and sound onto magnetic tape as opposed to movie film. ... Signal-to-noise ratio (often abbreviated SNR or S/N) is an electrical engineering concept defined as the ratio of a signal power to the noise power corrupting the signal. ... A megahertz (MHz) is one million (106) hertz, a measure of frequency. ... High-definition television (HDTV) means broadcast of television signals with a higher resolution than traditional formats (NTSC, SECAM, PAL) allow. ... See TV (disambiguation) for other uses and Television (band) for the rock band European networks National In much of Europe television broadcasting has historically been state dominated, rather than commercially organised, although commercial stations have grown in number recently. ... A movie studio is a controlled environment for the making of a film. ... Flicker has more than one meaning: A flicker is a type of woodpecker Flicker was bass guitarist for the Manic Street Preachers Flicker is a book by Theodore Roszak flicker occurs on a screen at low refresh rates. ... Frame rate, or frame frequency, is the measurement of how quickly an imaging device produces unique consecutive images called frames. ...


The picture quality was excellent, but IVC-9000 did not have many sales, 65 units. Shortly after it came out both 1 inch type B videotape and 1 inch type C videotape VTRs came out. Both used less costly tape and made just about as good of picture. 1 inch type B (designated Type B by SMPTE) is an open-reel videotape format developed by Bosch in Germany in 1976. ... 1 inch Type C (designated Type C by SMPTE) is a professional open-reel videotape format co-developed and introduced by Ampex and Sony in 1976. ...

  • Sony also made a 2 inch Helical scan VTR, but it was non-segmented and they sold even fewer of them.

Sony Corporation ) is a Japanese multinational corporation and one of the worlds largest media conglomerates with revenue of $68. ...

Also See

1 inch type B (designated Type B by SMPTE) is an open-reel videotape format developed by Bosch in Germany in 1976. ... 1 inch Type C (designated Type C by SMPTE) is a professional open-reel videotape format co-developed and introduced by Ampex and Sony in 1976. ... A video tape recorder (VTR), is a tape recorder that can record video material. ... Bottom view of VHS videotape cassette with magnetic tape exposed Videotape is a means of recording images and sound onto magnetic tape as opposed to movie film. ... The head drum of a Hi-Fi NTSC VHS VCR; three of the six heads face the reader. ... 2 inch Quadruplex (also called 2″ Quad, or just quad, for short) was the first practical and commercially successful videotape format. ...

Ext. Link and Ref.

  • More info on all the IVC VTRs
  • B&W Photo
  • Lab Guys World IVC Memories

 
 

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