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Videotape format war
The videotape format war was a period of intense competition or "format war" of incompatible models of consumer-level analog video videocassette and video cassette recorders (VCR) in the late 1970s and the 1980s, mainly involving the Betamax and VHS formats. VHS ultimately emerged as the pre-eminent format.
== Overview ==
The first video cassette recorder (VCR) to become available was the U-matic system, released in September 1971. U-matic was designed for commercial or professional television production use, and was not affordable or user-friendly for home videos or home movies. The first consumer-grade VCR to be released was the Philips N1500 VCR format in 1972, followed in 1975 by Sony's Betamax. This was quickly followed by the competing VHS (Video Home System) format from JVC, and later by Video 2000 from Philips. Subsequently, the Betamax–VHS format war began in earnest. Other competitors, such as the Avco Cartrivision, Sanyo's V-Cord and Quasar's "Great Time Machine" quickly disappeared.
Sony had demonstrated a prototype videotape recording system it called "Beta" to the other electronics manufacturers in 1974, and expected that they would back a single format for the good of all. But JVC in particular decided to go with its own format,〔http://www.oocities.org/hmoulding.geo/betamax.html〕 despite Sony's appeal to the Japanese Ministry of Trade and Industry, thus beginning the format war.
Manufacturers also introduced other systems such as needle-based, record-style discs (RCA's Capacitance Electronic Disc, JVC's Video High Density disc) and Philips' LaserDisc. None of these disc formats gained much ground as none was capable of home recording; however, they did hold small niche markets. CED's inexpensive〔"The early days" by J.K.Clemens and E.O.Keizer. "Electronic Servicing & Technology" magazine, May 1982.〕 record-like format (using a fine keel-shaped stylus to read an electronic signal rather than mechanical vibrations) made it attractive to low-income families during the 1980s, and LaserDisc's 5 megahertz/420 line resolution made it popular with discerning videophiles until circa 1997 (when DVD-Video became the new standard for high-quality).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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