Videocassette recorder

A videocassette recorder (VCR) records television or other video signals onto magnetic tape housed in a cassette and plays them back.

Helical scan: A magnetic recording method that writes diagonal tracks across moving tape using rotating heads. VCRs use rotating heads to record video’s high bandwidth on narrow cassette tape.
Ampex VRX-1000: A 1956 professional videotape recorder that used Ampex’s Quadruplex recording system. It demonstrated practical videotape recording before compact consumer videocassettes existed.
Home video: Video content produced, recorded, or watched in domestic settings rather than primarily in theaters or broadcast venues. The VCR made prerecorded films and home recordings part of everyday domestic media.
Sony Corp. of America v. Universal City Studios: A 1984 United States Supreme Court case holding that home videotaping for private time-shifting was fair use. The case considered whether consumers could use VCRs to record television broadcasts.
Magnetic tape: A recording medium in which a magnetic coating stores signals as patterns of magnetization. Video and audio are stored as magnetic patterns on the tape inside each cassette.
Sony U-matic: A professional three-quarter-inch videocassette format introduced by Sony in 1971. U-matic brought video recording into a cassette system before the mass-market home VCR.
Video rental store: A retail business that lends prerecorded films and other video cassettes for a fee. VHS playback helped rental stores distribute films without selling a copy to every household.
Betamax case: The common name for the copyright dispute over Sony’s sale of Betamax videocassette recorders. The litigation tested whether a VCR maker was liable for customers’ recording practices.
Video head: A transducer that converts video signals into magnetic patterns on tape or reads those patterns during playback. Rotating video heads write and recover the diagonal tracks used by a VCR.
Betamax: A videocassette format introduced by Sony in 1975 for consumer home recording and playback. Betamax was one of the two main formats that defined the home VCR market.

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