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V-Cord
V-Cord is an analog recording videocassette format developed and released by Sanyo. V-Cord (later referred to as V-Cord I) was released in 1974, and could record 60 minutes on a cassette. V-Cord II, released in 1976, could record 120 minutes on a V-Cord II cassette. The V-Cord II machines were the first consumer VCRs to offer two recording speeds. Appearance The original V-Cord cassette had a large hub and was wound with standard-thickness magnetic tape; V-Cord II used a small hub wound with thin tape, the same thickness later used for VHS-120 and Beta L-750. The cassettes were not rectangular, being tapered at one narrow end. Unlike subsequent formats VHS and Betamax, which loaded with the tape facing front on the long side of the cassette, the V-Cord cartridge was loaded sideways with the narrow side serving as the "front" and the tape coming out the "side". The tape was held in place in the machine by a notch halfway down the right side of the tape, similar to the means by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Tape
Magnetic tape is a medium for magnetic storage made of a thin, magnetizable coating on a long, narrow strip of plastic film. It was developed in Germany in 1928, based on the earlier magnetic wire recording from Denmark. Devices that use magnetic tape could with relative ease record and playback audio, visual, and binary computer data. Magnetic tape revolutionized sound recording and reproduction and broadcasting. It allowed radio, which had always been broadcast live, to be recorded for later or repeated airing. Since the early 1950s, magnetic tape has been used with computers to store large quantities of data and is still used for backup purposes. Magnetic tape begins to degrade after 10–20 years and therefore is not an ideal medium for long-term archival storage. Durability While good for short-term use, magnetic tape is highly prone to disintegration. Depending on the environment, this process may begin after 10–20 years. Over time, magnetic tape made in the 197 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sanyo
, stylized as SANYO, is a Japanese electronics company and formerly a member of the Fortune Global 500, ''Fortune'' Global 500 whose headquarters was located in Moriguchi, Osaka, Moriguchi, Osaka prefecture, Japan. Sanyo had over 230 subsidiaries and affiliates, and was founded by Toshio Iue in 1947. On December 21, 2009, Panasonic completed a 400 billion yen ($4.5 billion) acquisition of a 50.2% stake in Sanyo, making Sanyo a subsidiary of Panasonic. In April 2011, Sanyo became a wholly owned subsidiary of Panasonic, with its assets integrated into the latter's portfolio. History Beginnings Sanyo was founded when Toshio Iue the brother-in-law of Konosuke Matsushita and also a former Panasonic Corporation, Matsushita employee, was lent an unused Matsushita plant in 1947 and used it to make bicycle generator lamps. Sanyo was incorporated in 1949; in 1952 it made Japan's first plastic radio and in 1954 Japan's first pulsator-type washing machine. The company's name means ''thre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Tape
Magnetic tape is a medium for magnetic storage made of a thin, magnetizable coating on a long, narrow strip of plastic film. It was developed in Germany in 1928, based on the earlier magnetic wire recording from Denmark. Devices that use magnetic tape could with relative ease record and playback audio, visual, and binary computer data. Magnetic tape revolutionized sound recording and reproduction and broadcasting. It allowed radio, which had always been broadcast live, to be recorded for later or repeated airing. Since the early 1950s, magnetic tape has been used with computers to store large quantities of data and is still used for backup purposes. Magnetic tape begins to degrade after 10–20 years and therefore is not an ideal medium for long-term archival storage. Durability While good for short-term use, magnetic tape is highly prone to disintegration. Depending on the environment, this process may begin after 10–20 years. Over time, magnetic tape made in the 197 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sanyo Products
, stylized as SANYO, is a Japanese electronics company and formerly a member of the ''Fortune'' Global 500 whose headquarters was located in Moriguchi, Osaka prefecture, Japan. Sanyo had over 230 subsidiaries and affiliates, and was founded by Toshio Iue in 1947. On December 21, 2009, Panasonic completed a 400 billion yen ($4.5 billion) acquisition of a 50.2% stake in Sanyo, making Sanyo a subsidiary of Panasonic. In April 2011, Sanyo became a wholly owned subsidiary of Panasonic, with its assets integrated into the latter's portfolio. History Beginnings Sanyo was founded when Toshio Iue the brother-in-law of Konosuke Matsushita and also a former Matsushita employee, was lent an unused Matsushita plant in 1947 and used it to make bicycle generator lamps. Sanyo was incorporated in 1949; in 1952 it made Japan's first plastic radio and in 1954 Japan's first pulsator-type washing machine. The company's name means ''three oceans'' in Japanese, referring to the founder's ambitio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Videocassette
Videotape is magnetic tape used for storing video and usually sound in addition. Information stored can be in the form of either an analog or digital signal. Videotape is used in both video tape recorders (VTRs) and, more commonly, videocassette recorders (VCRs) and camcorders. Videotapes have also been used for storing scientific or medical data, such as the data produced by an 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 simi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coercivity
Coercivity, also called the magnetic coercivity, coercive field or coercive force, is a measure of the ability of a ferromagnetic material to withstand an external magnetic field without becoming demagnetized. Coercivity is usually measured in oersted or ampere/meter units and is denoted . An analogous property in electrical engineering and materials science, electric coercivity, is the ability of a ferroelectric material to withstand an external electric field without becoming depolarized. Ferromagnetic materials with high coercivity are called magnetically ''hard'', and are used to make permanent magnets. Materials with low coercivity are said to be magnetically ''soft''. The latter are used in transformer and inductor cores, recording heads, microwave devices, and magnetic shielding. Definitions Coercivity in a ferromagnetic material is the intensity of the applied magnetic field (''H'' field) required to demagnetize that material, after the magnetization of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Video Storage
Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media. Video was first developed for mechanical television systems, which were quickly replaced by cathode-ray tube (CRT) systems which, in turn, were replaced by flat panel displays of several types. Video systems vary in display resolution, aspect ratio, refresh rate, color capabilities and other qualities. Analog and digital variants exist and can be carried on a variety of media, including radio broadcast, magnetic tape, optical discs, computer files, and network streaming. History Analog video Video technology was first developed for mechanical television systems, which were quickly replaced by cathode-ray tube (CRT) television systems, but several new technologies for video display devices have since been invented. Video was originally exclusively a live technology. Charles Ginsburg led an Ampex research team developing one of the first practical video ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wayback Machine
The Wayback Machine is a digital archive of the World Wide Web founded by the Internet Archive, a nonprofit based in San Francisco, California. Created in 1996 and launched to the public in 2001, it allows the user to go "back in time" and see how websites looked in the past. Its founders, Brewster Kahle and Bruce Gilliat, developed the Wayback Machine to provide "universal access to all knowledge" by preserving archived copies of defunct web pages. Launched on May 10, 1996, the Wayback Machine had more than 38.2 million records at the end of 2009. , the Wayback Machine had saved more than 760 billion web pages. More than 350 million web pages are added daily. History The Wayback Machine began archiving cached web pages in 1996. One of the earliest known pages was saved on May 10, 1996, at 2:08p.m. Internet Archive founders Brewster Kahle and Bruce Gilliat launched the Wayback Machine in San Francisco, California, in October 2001, primarily to address the problem of web co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio-Electronics
''Radio-Electronics'' was an American electronics magazine that was published under various titles from 1929 to 2003. Hugo Gernsback, sometimes called the father of science fiction, started it as ''Radio-Craft'' in July 1929. The title was changed to ''Radio-Electronics'' in October 1948 and again to ''Electronics Now'' in July 1992. In January 2000 it was merged with Gernsback's ''Popular Electronics'' to become ''Poptronics''. Gernsback Publications ceased operations in December 2002 and the January 2003 issue was the last. Over the years, ''Radio-Electronics'' featured audio, radio, television and computer technology. The most notable articles were the TV Typewriter (September 1973) and the Mark-8 computer (July 1974). These two issues are considered milestones in the home computer revolution. Earlier publications In 1905 Hugo Gernsback established Electro Importing Company to sell radio components and electrical supplies by mail order. The catalogs had detailed instructions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IVC Videotape Format
IVC 2 inch Helical scan was a high-end broadcast quality helical scan analog recording VTR format developed by International Video Corporation (IVC), and introduced in 1975. Previously, IVC had made a number of 1 inch Helical VTRs. IVC saw a chance to make a VTR that would have the quality of the then-standard 2 inch Quadruplex videotape format but with the advantages of helical scan. They then developed a VTR using this technology, the IVC Model 9000. Versions *IVC made the Model 9000 in five versions: **IVC 9000 (NTSC and PAL unit, could record for 2 hours on one 10.5 inch reel) **IVC 9000-4 (4 ips tape speed, Long Play, could record and play back 4 hours on one 10.5 inch reel **IVC 9000-W (8 MHz record and playback for super bandwidth) **IVC 9000-M (could record and playback video in the 655-line/ 48 field per second (24 frame/s) video standard) **IVC 9000-W-M (An IVC 9000-M with options from the 9000-W added to it, enabling both 8 MHz wideband video ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quadruplex Videotape
2-inch quadruplex videotape (also called 2″ quad video tape or quadraplex) was the first practical and commercially successful analog recording video tape format. It was developed and released for the broadcast television industry in 1956 by Ampex, an American company based in Redwood City, California. The first videotape recorder using this format was built in the same year. This format revolutionized broadcast television operations and television production, since the only recording medium available to the TV industry until then was film used for kinescopes. Since most United States West Coast network broadcast delays done by the television networks at the time were done with film kinescopes that needed time for developing, the networks wanted a more practical, cost-effective, and quicker way to time shifting, time-shift television programming for later airing on the West Coast than the expense and time consumption of the processing and editing of film caused. Faced with thes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
