Videotape

Source: Wikipedia, the free encyclopedia.
For Radiohead's song, see In Rainbows.

An assortment of video tapes

Videotape is

electrocardiogram
.

Because video signals have a very high bandwidth, and stationary heads would require extremely high tape speeds, in most cases, a helical-scan video head rotates against the moving tape to record the data in two dimensions.

Tape is a linear method of storing information and thus imposes delays to access a portion of the tape that is not already against the heads. The early 2000s saw the introduction and rise to prominence of high-quality random-access video recording media such as hard disks and flash memory. Since then, videotape has been increasingly relegated to archival and similar uses.

Early formats

The electronics division of entertainer Bing Crosby's production company, Bing Crosby Enterprises (BCE), gave the world's first demonstration of a videotape recording in Los Angeles on November 11, 1951. In development by John T. Mullin and Wayne R. Johnson since 1950, the device gave what were described as "blurred and indistinct" images using a modified Ampex 200 tape recorder and standard quarter-inch (0.635 cm) audio tape moving at 360 inches (9.1 m) per second.[1][2] A year later, an improved version using one-inch (2.54 cm) magnetic tape was shown to the press, who reportedly expressed amazement at the quality of the images although they had a "persistent grainy quality that looked like a worn motion picture." Overall the picture quality was still considered inferior to the best kinescope recordings on film.[3] Bing Crosby Enterprises hoped to have a commercial version available in 1954 but none came forth.[4]

The BBC experimented from 1952 to 1958 with a high-speed linear videotape system called Vision Electronic Recording Apparatus (VERA), but this was ultimately dropped in favor of quadruplex videotape. VERA used half-inch metallized (1.27 cm) tape on 20-inch reels traveling at 200 inches per second (5.1 m/s).

television program. The color system used half-inch (1.27 cm) tape on 10½ inch reels to record five tracks, one each for red, blue, green, synchronization, and audio. The black-and-white system used quarter-inch (0.635 cm) tape also on 10½ inch reels with two tracks, one for video and one for audio. Both systems ran at 360 inches per second (9.1 m/s) with 2,500 feet (760 m) per reel yielding an 83-second capacity.[7] RCA-owned NBC first used it on The Jonathan Winters Show on October 23, 1956, when a prerecorded song sequence by Dorothy Collins in color was included in the otherwise live television program.[8][9]

In 1953, Norikazu Sawazaki developed a prototype helical scan video tape recorder.[10]

BCE demonstrated a color system in February 1955 using a longitudinal recording on half-inch (1.27 cm) tape. CBS, RCA's competitor, was about to order BCE machines when Ampex introduced the superior Quadruplex system.[11] BCE was acquired by 3M Company in 1956.

In 1959, Toshiba released the first commercial helical scan video tape recorder.[12]

Broadcast video

Quad

MiniDV
videocassette. Both media store one hour of color video.

The first commercial professional broadcast quality videotape machines capable of replacing kinescopes were the two-inch quadruplex videotape (Quad) machines introduced by Ampex on April 14, 1956, at the National Association of Broadcasters convention in Chicago. Quad employed a transverse (scanning the tape across its width) four-head system on a two-inch (5.08 cm) tape and stationary heads for the soundtrack.

NBC Television game show Truth or Consequences, produced in Hollywood, became the first program to be broadcast in all time zones from a prerecorded videotape.[15]

Ampex introduced a color videotape recorder in 1958 in a cross-licensing agreement with RCA, whose engineers had developed it from an Ampex black-and-white recorder.

television network color videotape, and has been restored by the UCLA Film and Television Archive
.

On December 7, 1963, instant replay, originally a videotape-based system, was used for the first time during the live transmission of the Army–Navy Game by its inventor, director Tony Verna.[17]

Although Quad became the industry standard for approximately thirty years, it has drawbacks such as an inability to freeze pictures, and no picture search.[a] Also, in early machines, a tape could reliably be played back using only the same set of hand-made tape heads, which wore out very quickly.[b] Despite these problems, Quad is capable of producing excellent images. Subsequent videotape systems have used helical scan, where the video heads record diagonal tracks (of complete fields) onto the tape.

Many early videotape recordings were not preserved. While much less expensive (if repeatedly recycled) and more convenient than kinescope, the high cost of 3M Scotch 179[13] and other early videotapes ($300 per one-hour reel)[19] meant that most broadcasters erased and reused
them, and (in the United States) regarded videotape as simply a better and more cost-effective means of time-delaying broadcasts than kinescopes. It was the four time zones of the continental United States which had made the system very desirable in the first place.

Some early broadcast videotapes have survived, including

Mark Twain Tonight (first telecast in 1967), and Mikhail Baryshnikov's classic production of the ballet The Nutcracker
(first telecast in 1977).

Types C and B

The next format to gain widespread usage was 1 inch (2.54 cm) Type C videotape introduced in 1976. This format introduced features such as shuttling, various-speed playback (including slow-motion), and still framing. Although 1" Type C's quality was still quite high, the sound and picture reproduction attainable on the format were of slightly lower quality than Quad. However, compared to Quad, 1" Type C machines required much less maintenance, took up less space, and consumed much less electrical power.

In Europe, a similar tape format was developed, called 1 inch Type B videotape. Type B machines use the same 1" tape as Type C but they lacked C's shuttle and slow-motion options. The picture quality is slightly better, though. Type B was the broadcast norm in continental Europe for most of the 1980s.

Professional cassette formats

U-matic tape

A videocassette is a cartridge containing videotape. In 1969,

MII
system, but never could compare to Betacam in terms of market share.

The next step was the

D-5
format was introduced in 1994. Like D-1, it is uncompressed, but much more affordable.

The

MiniDV
and in more robust professional variants.

In digital camcorders, Sony adapted the Betacam system with its

DVCPRO50 being a direct descendant. JVC developed the competing D9/Digital-S format, which compresses video data in a way similar to DVCPRO but uses a cassette similar to S-VHS media. Many helical scan cassette formats such as VHS and Betacam use a head drum with heads that use azimuth recording, in which the heads in the head drum have a gap that is tilted at an angle, and opposing heads have their gaps tilted so as to oppose each other.[21][22]

High definition

The introduction of

D-5 HD
.

Home video

MiniDV
(bottom)

Videocassette recorders

The first consumer

N1500.[23] Sony's Betamax (1975) and JVC's VHS (1976) created a mass-market for VCRs and the two competing systems battled the videotape format war, which VHS ultimately won. In Europe, Philips had developed the Video 2000
format, which did not find favor with the TV rental companies in the UK and lost out to VHS.

At first VCRs and videocassettes were very expensive, but by the late 1980s the price had come down enough to make them affordable to a mainstream audience. Videocassettes finally made it possible for consumers to buy or rent a complete film and watch it at home whenever they wished, rather than going to a movie theater or having to wait until it was telecast. It gave birth to video rental stores,

cult films
).

VHS became the leading consumer tape format for

home movies after the videotape format war, though its follow-ups S-VHS, W-VHS and D-VHS never caught up in popularity. In the early 2000s in the prerecorded video market, VHS began to be displaced by DVD. The DVD format has several advantages over VHS tape. A DVD is much better able to take repeated viewings than VHS tape. Whereas a VHS tape can be erased though degaussing, DVDs and other optical discs are not affected by magnetic fields. DVDs can still be damaged by scratches. DVDs are smaller and take less space to store. DVDs can support both standard 4x3 and widescreen 16x9 screen aspect ratios and DVDs can provide twice the video resolution of VHS. DVD supports random access while a VHS tape is restricted to sequential access and must be rewound. DVDs can have interactive menus, multiple language tracks, audio commentaries, closed captioning
and subtitling (with the option of turning the subtitles on or off, or selecting subtitles in several languages). Moreover, a DVD can be played on a computer.

Due to these advantages, by the mid-2000s, DVDs were the dominant form of prerecorded video movies. Through the late 1990s and early 2000s consumers continued to use VCRs to record over-the-air TV shows, because consumers could not make home recordings onto DVDs. This last barrier to DVD domination was broken in the late 2000s with the advent of inexpensive DVD recorders and digital video recorders (DVRs). In July 2016, the last known manufacturer of VCRs, Funai, announced that it was ceasing VCR production.[24]

Consumer and prosumer camcorders

DV cassettes left to right: DVCAM-L, DVCPRO-M, DVC/MiniDV

Early consumer

Hi8
, which provides better resolution similar to S-VHS.

The first consumer-level and lower-end professional (

MiniDV to reflect the DV encoding scheme, but the tapes are still marked DVC. Some later formats like DVC Pro from Panasonic reflect the original name. The DVC or MiniDV format provides broadcast-quality video and sophisticated nonlinear editing capability on consumer and some professional equipment and has been used on feature films, including Danny Boyle's 28 Days Later (2002, shot on a Canon XL1)[26][27] and David Lynch's Inland Empire (2006, shot on a Sony DSR-PD150).[28]

In 1999 Sony backported the DV recording scheme to 8-mm systems, creating

analog video
tapes.

Sony introduced another camcorder cassette format called MicroMV in 2001. Sony was the only electronics manufacturer to sell MicroMV cameras. In 2006, Sony stopped offering new MicroMV camcorder models.[29] In November 2015, Sony announced that shipment of MicroMV cassettes would be discontinued in March 2016.[30][31][32]

In the late 2000s,

MiniDV and its high-definition cousin, HDV
, were the two most popular consumer or prosumer tape-based formats. The formats use different encoding methods, but the same cassette type.

Future of tape

See also: Tapeless production

With advances in technology, videotape has moved past its original uses (original recording, editing, and broadcast playback) and is now primarily an archival medium. The death of tape for video recording was predicted as early as 1995, when the Avid nonlinear editing system was demonstrated storing video clips on hard disks. Yet videotape was still used extensively, especially by consumers, up until about 2004, when DVD-based camcorders became affordable at consumer level and domestic computers had large enough hard drives to store an acceptable amount of video.

Consumer camcorders have switched from being tape-based to

SD cards
being the current market leader. There are two primary advantages: First, copying a tape recording onto a computer or other video machine occurs in real time (e.g. a ten-minute video would take ten minutes to copy); since tapeless camcorders record video as computer-ready data files, the files can simply be copied onto a computer. Second, tapeless camcorders, and those using solid-state memory in particular, are far simpler mechanically and so are more reliable.

Despite these conveniences, tape is still used extensively with filmmakers and television networks because of its longevity, low cost, and reliability. Master copies of visual content are often stored on tape for these reasons, particularly by users who cannot afford to move to tapeless machines. Professional users such as broadcast television were still using tape heavily in the mid- to late 2000s, but tapeless formats like DVCPRO P2, XDCAM and AVCHD are gaining broader acceptance.

While live recording has migrated to solid state (Panasonic P2, Sony SR MASTER or XDCAM-EX), optical disc (Sony's XDCAM) and hard disks, the high cost of solid state and the limited shelf life of hard-disk drives make them less desirable for archival use, for which tape is still used. As of 2016, some news and production camera crews still have cameras that use tape formats, even in HD.

Notes

  1. ^ In fact, the quadruplex format can only reproduce recognizable pictures when the tape is playing at normal speed.[18]
  2. ^ Later machines had longer life and used delay lines to compensate for the differences in the four heads.

References

  1. ^ "Tape Recording Used by Filmless 'Camera'", The New York Times, Nov. 12, 1951, p. 21.
  2. ISBN 0-07-041275-8
  3. ^ "Tape-Recorded TV Nears Perfection", The New York Times, Dec. 31, 1952, p. 10.
  4. ^ "New Deal on TV Seen at Parley", The New York Times, May 1, 1953, p. 30.
  5. ^ "Magnetic Tape Used By RCA to Photograph Television Program", The Wall Street Journal, Dec. 2, 1953, p. 1.
  6. ^ "Color TV on Tape", Popular Mechanics, April 1954, p. 157.
  7. ^ Stewart Wolpin (Autumn 1994). "The Race to Video". Invention & Technology. Archived from the original on 2011-04-04.
  8. ^ "TV Goes to Tape". Popular Science. February 1960. p. 238.
  9. ^ Ed Reitan, RCA-NBC Firsts in Color Television (commented), archived from the original on 2008-12-19.
  10. ^ SMPTE Journal: Publication of the Society of Motion Picture and Television Engineers, Volume 96, Issues 1-6; Volume 96, page 256, Society of Motion Picture and Television Engineers
  11. ^ Daniel et al., p. 148.
  12. ^ World's First Helical Scan Video Tape Recorder, Toshiba
  13. ^ a b c "Charles P. Ginsburg". Memorial Tributes: National Academy of Engineering, Vol. 7. 1994: The National Academies Press, Washington DC.
  14. ^ Ampex Corporation, Ampex Chronology Archived 2007-07-03 at the Wayback Machine.
  15. ^ "Daily N.B.C. Show Will Be on Tape", The New York Times, Jan. 18, 1957, p. 31.
  16. ^ "Industry Agrees to Standardize Tape Recording on Ampex Lines", Billboard, Oct. 28, 1957, p. 3.
  17. ^ "He Invented Instant Replay, The TV Trick We Now Take For Granted", Morning Edition, NPR, January 20, 2015
  18. ^ Wink Hackman; Expert training for Sony MVS users worldwide Retrieved September 19, 2015
  19. ^ Elen, Richard G. "TV Technology". BFI Screenonline.
  20. ^ Sony Unveils Latest Products at IBC, retrieved 2023-05-22
  21. ISSN 1526-3681
    .
  22. ISBN 9781136024184
    – via Google Books.
  23. ^ "Philips N1500, N1700 and V2000 systems". Rewind Museum. Vision International. 2011. Retrieved January 19, 2015.
  24. ^ Sun, Yazhou; Yan, Sophia (2016-07-22). "The last VCR will be manufactured this month". CNNMoney. Retrieved 2018-01-22.
  25. ^ "DVC Product Probe". November 1995.
  26. ^ Bankston, Douglas (1 July 2003). "Anthony Dod Mantle, DFF injects the apocalyptic 28 Days Later with a strain of digital video". TheASC.com. Retrieved 1 May 2007.
  27. ^ Jones, Ralph (2023-06-27). "'28 Days Later': The Oral History of Danny Boyle's Genre-Redefining Zombie Masterpiece". Inverse. Retrieved 2023-07-24.
  28. ^ Perez, Rodrigo (March 24, 2022). "'Inland Empire' Restoration Trailer: David Lynch's Surreal DV Nightmare Comes Back To Theaters In April". ThePlaylist.net. Retrieved April 1, 2022.
  29. ^ m.b.H., STANDARD Verlagsgesellschaft (2015-11-10). "Sony: Das Ende von Betamax naht". derStandard.at (in German). Retrieved 2017-08-03. The last camcorder with MicroMV was discontinued in early 2006.
  30. ^ "Sony is finally killing off Betamax video tapes". The Telegraph. 2015-11-10. Retrieved 2015-11-15. "Sony will end the shipment of Betamax video cassettes and micro MV cassettes in March 2016," the company said in a Japanese-language statement on its website.
  31. ^ "ベータビデオカセットおよびマイクロMVカセットテープ出荷終了のお知らせ" [Beta video cassette and micro MV cassette tape shipment end of announcement] (in Japanese). Sony Japan. 2015-11-10. Archived from the original on 2015-11-10. Retrieved 2015-11-15. ソニーは2016年3月※をもって、ベータビデオカセットおよびマイクロMVカセットの出荷を終了いたします。 ("Sony with a ? March 2016, will end the shipment of beta video cassette and micro cassette MV.")
  32. ^ "40 years later, Sony finally kills Betamax". Engadget. Retrieved 2015-11-10. [Sony is] also dropping its MicroMV camcorder tapes In a bid to... make space in the warehouse, we guess.

External links

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