Videodisc

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Videodisc and VHS Cassette

Videodisc (or video disc) is a general term for a

SVCD
.

History

Georges Demeny on March 3, 1892 patented a 'phonoscope', designed in 1891, that can project chronophotographic pictures on a glass disc.[1][2]

Eadweard Muybridge used his zoopraxiscope to project chronophotographic pictures on a glass disc in 1893.[3]

E & H T Anthony, a camera maker based in New York, marketed in 1898 a combination motion picture camera and projector called "The Spiral" that could capture 200 images arranged in a spiral on an 8-inch diameter glass plate. When played back at 16 frames per second, it would give a running time of 13 seconds.[4]

Theodore Brown patented in 1907 (UK patent GB190714493) a photographic disk system of recording approximately 1,200 images in a spiral of pictures on a 10-inch disk. Played back at 16 frames per second, a disk provides around one and a quarter minutes of material. The system was marketed as the Urban Spirograph by Charles Urban, and discs were produced - but it soon disappeared.[5]

John Logie Baird, created the Phonovision system in the early 1930s, which mechanically produces about four frames per second. The system was not successful.

Westinghouse Electric during the 1950s and 1960s patented a system in 1952 (US Patent 3198880) which uses a slow spinning disc with a spiral track of photographically 1.5 millimeter wide recorded frames, along with a flying spot scanner, which sweeps over them to produce a video image. This was intended to be synchronously combined with playback from a vinyl record. It appears a working system was never produced. It has similarities with the tape based Electronic Video Recording
system, which was released for professional use.

Westinghouse Electric Corporation developed a system in 1965 called Phonovid, that allows for the playback of 400 stored still images, along with 40 minutes of sound.[6] The system uses a standard record player, and builds the picture up slowly.

The Television Electronic Disc, a mechanical system, was rolled out in Germany and Austria in 1970 by Telefunken. The 12-inch discs have a capacity of about eight minutes; however, it was abandoned in favor of VHS by its parent company.[7]

In Japan, the TOSBAC computer was using digital video disks to display color pictures at 256x256 image resolution in 1972.[8] In 1973, Hitachi announced a video disc capable of recording 15-colour still images on a disc. The same year, Sony announced a video disc recorder, similar to the Sony Mavica format.[9]

In 1975, Hitachi introduced a video disc system in which chrominance, luminance and sound information are encoded

PAL/SECAM.[9]

Visc is a mechanical video disc system developed in Japan by

National Panasonic in 1978. The 12-inch vinyl disc is spun at 500 rpm with each revolution holding three frames of color video, with a total of up to an hour of video on each side of the disc.[9] Discs can be recorded in either a 30-minute-per-side format, or a 60-minute-per-side-format. A later incarnation of the system uses 9-inch discs in caddies capable of storing 75 minutes per side.[10] The system was abandoned in January 1980 in favor of JVC's VHD system.[11]

The

MCA and Philips of the Netherlands, it utilizes an optical reflective system read by a laser beam. It was renamed several times, as VLP, Laservision, and CD Video. Finally, Japan's Pioneer Electronic Corporation trademarked it as LaserDisc
, the name by which it is perhaps best known. The format struggled to gain wide acceptance in the consumer market, and Pioneer became the chief sponsor of the format when MCA, and later Philips, withdrew their support for it. The high cost of both players and discs was the main reason for its ultimate demise.

Thomson CSF created a system that uses thin flexible video discs and a transmissive laser system, with light source and pickup on opposite sides of the disc. The system was marketed for industrial and educational use in 1980. Each side of the disc can hold 50,000 still CAV frames, and both sides can be read without removing the disc. Thomson exited the videodisc market in 1981.[12]

RCA produced a system called CED under the brand SelectaVision in 1981. The system uses a physical pickup riding in grooves of a pressed disc, reading variance in capacitance in the underlying disc. The system competed with Laserdisc for a few years, before being abandoned in 1984. Although, movie studios continued releasing titles in the format until 1986.

JVC produced a system very similar to CED called Video High Density (VHD). It was launched in 1983 and marketed predominantly in Japan. It is a capacitance contact system but without grooves. VHD discs were adopted in the UK by Thorn EMI which started to develop a consumer catalogue, including bespoke material. Development for the mass market was halted in late 1983, but the system remained on sale for educational and business markets as a computer-controlled video system until the late 1980s.

Laserfilm, a videodisc format developed by McDonnell Douglas was released in 1984.

PC containing a video file of a movie encoded in a proprietary codec developed by the publisher (the MotionPixels codec, also used in some PC video games in the mid-to-late 1990s), with the disc also containing codec and playback software for the movie. The quality is somewhat low due to the compression the MotionPixels codec used, resulting in a playback resolution of only 320x236 at 16 frames per second, using 16-bit high color
.

Blu-ray Disc has only recently gained traction in the consumer market, where it competes with the continued success of DVD and the rise of streaming movie services such as Netflix
.

Classification

Video discs can be classed based on their playback mechanism:

See also

References

Notes

  1. ^ "Who's Who of Victorian Cinema". www.victorian-cinema.net.
  2. ISBN 9781501302695
    .
  3. ^ "The quest for home video: Zoöpraxography". www.terramedia.co.uk.
  4. ^ "The quest for home video: Anthony Spiral". www.terramedia.co.uk.
  5. ^ "The quest for home video: Urban Spirograph". www.terramedia.co.uk.
  6. ^ "LabGuy's World: Extinct Westinghouse Video Equipment". www.labguysworld.com.
  7. ^ Gould, Jack (October 19, 1970). "Movies on Plastic Disks for Home TV Displayed". The New York Times. p. 67.
  8. ^ First USA-Japan Computer Conference Proceedings: October 3-5, 1972, Tokyo, Japan, page 320, American Federation of Information Processing Societies
  9. ^ a b c "The quest for home video: Video discs part 2". www.terramedia.co.uk.
  10. ^ Billboard, 28 April 1979
  11. ^ Video Age: Television Technology and Applications in the 1980s (Video Bookshelf) (Hardcover)
  12. ^ "Thomson-CSF Transmissive VideoDisc System from 1980". www.cedmagic.com.

Bibliography

External links
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