Magnetic Recording: The First 100 YearsEric D. Daniel, C. Denis Mee, Mark H. Clark Electrical Engineering/History of Technology Magnetic Recording The First 100 Years The first magnetic recording device was demonstrated and patented by the Danish inventor Valdemar Poulsen in 1898. Poulsen made a magnetic recording of his voice on a length of piano wire. Magnetic Recording traces the development of the watershed products and the technical breakthroughs in magnetic recording that took place during the century from Poulsen’s experiment to today’s ubiquitous audio, video, and data recording technologies, including tape recorders, video cassette recorders, and computer hard drives. An international author team brings a unique perspective, drawn from professional experience, to the history of magnetic recording applications. Their key insights shed light on how magnetic recording triumphed over all competing technologies and revolutionized the music, radio, television, and computer industries. They also show how these developments offer opportunities for future applications. Magnetic Recording features 116 illustrations, including 92 photographs of historic magnetic recording machines and their inventors. |
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Page 112
... modulated by the audio waveform much as the carrier wave in an AM radio is modulated . Unlike an AM carrier , however , a sampling clock has harmonics , and the modulation produces sidebands around the fundamental and harmonics alike ...
... modulated by the audio waveform much as the carrier wave in an AM radio is modulated . Unlike an AM carrier , however , a sampling clock has harmonics , and the modulation produces sidebands around the fundamental and harmonics alike ...
Page 157
... modulation scheme . The great novelty , at the time , of Anderson's FM scheme was that the modulating frequency ( of the video ) was comparable to the carrier frequency . In normal broadcast FM audio , for example , the modulating ...
... modulation scheme . The great novelty , at the time , of Anderson's FM scheme was that the modulating frequency ( of the video ) was comparable to the carrier frequency . In normal broadcast FM audio , for example , the modulating ...
Page 328
... modulation code . It took many years for the U.S. and international standard organizations , ANSI and ISO , to arrive at an industry standard , and many applications were de- layed . It was also curious to learn that most modulation ...
... modulation code . It took many years for the U.S. and international standard organizations , ANSI and ISO , to arrive at an industry standard , and many applications were de- layed . It was also curious to learn that most modulation ...
Contents
AUDIO RECORDING | 6 |
The Telegraphone | 15 |
Steel Tape and Wire Recorders | 30 |
Copyright | |
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Magnetic Recording: The First 100 Years Eric D. Daniel,C. Denis Mee,Mark H. Clark Limited preview - 1998 |
Common terms and phrases
ac bias Ampex analog applications areal density audio recording b/in bandwidth BASF bit density broadcast capacity capstan cartridge channel coating color compact cassette consumer cost Courtesy of IBM data rate data recording data storage developed device diameter digital audio digital recording digital video recording disk drive disk surface diskette early electronic engineers equipment error ferrite Figure film frequency hard disk helical-scan improved inches industry instrumentation recorder Jack Mullin Japan laboratory machine magnetic disk magnetic drum magnetic recording magnetic tape Magnetophon manufacturers Mb/s mechanism memory Model modulation operation Panasonic performance personal computer playback Poulsen production quadruplex radio RAMAC read/write recording format recording medium recording system recording technology reel rotating slider SMPTE Sony sound standard stored t/in tape drive tape systems Telegraphone television tion track density United video cassette recorder video signal video tape recorder wire