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The phrase cassette tape is ambiguous in that there is no common dictionary definition [1] [2] [3] so depending upon usage it has many different meanings, as for example any one the one of 106 different types of audio cassettes, [4] video cassettes [5] or data cassettes [6] listed at The Museum of Obsolete Media.
This required the system to run at a tape speed of 14.29 cm/s (5.63 inches per second). [2] 6.56 cm/s (2.58 inches per second) was the speed of the long play variant. [3] The Philips VCR system brought together many advances in video recording technology to produce the first truly practical home video cassette system.
Remanence of audio tapes, referred to quarter-inch tape width, varies from around 1100 G for basic ferric tapes to 3500 G for Type IV tapes; [5] advertised remanence of the 1986 JVC Type IV cassette reached 4800 G. [6] Coercivity is a measure of the external magnetic flux required to magnetize the tape, and an indicator of the necessary bias level.
As with almost all cassette-based videotape systems, VHS machines pull the tape out of the cassette shell and wrap it around the inclined head drum, which rotates at 1,800 rpm in NTSC machines [38] and at 1,500 rpm for PAL, one complete rotation of the head corresponding to one video frame.
The result was a very poor picture. Another of the early efforts was the Vision Electronic Recording Apparatus, a high-speed multi-track machine developed by the BBC in 1952. [3] This machine used a thin steel tape on a 21-inch (53.5 cm) reel traveling at over 200 inches (510 cm) per second.
Ampex created the first D-2 video machine, the ACR-225 commercial spot player [2] working with Sony, who had done some early research into composite digital video, [3] as a cost-effective solution for TV broadcasters with large investments in composite analog infrastructure such as video routers and switchers, since it could be inserted into existing analog broadcast facilities without ...
A 14-inch reel of 2-inch quad videotape compared with a modern-day 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.
MII is a professional analog recording videocassette format developed by Panasonic in 1986 in competition with Sony's Betacam SP format. It was technically similar to Betacam SP, using metal-formulated tape loaded in the cassette, and utilizing component video recording.