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 115
... error correction . Blocks of data cannot be recorded directly on magnetic media . The data have to be modulated or ... error correction process can also de- termine whether any data are in error and make corrections . Following error cor ...
... error correction . Blocks of data cannot be recorded directly on magnetic media . The data have to be modulated or ... error correction process can also de- termine whether any data are in error and make corrections . Following error cor ...
Page 116
... errors , where many bits are in error close together . A random error might be due to electrical interference , whereas a burst error might result from a scratch on the medium . Burst errors are difficult to correct , but they tend not ...
... errors , where many bits are in error close together . A random error might be due to electrical interference , whereas a burst error might result from a scratch on the medium . Burst errors are difficult to correct , but they tend not ...
Page 117
... Error P P P P P Error ( b ) Four data bits P1 P2 3 P3 5 6 7 X Χ X << P3 code X X X X -P2 code P1 code ( c ) Figure 8-4 Error correction . ( a ) A simple parity check is used . ( b ) A bit in error is at the intersection of two error ...
... Error P P P P P Error ( b ) Four data bits P1 P2 3 P3 5 6 7 X Χ X << P3 code X X X X -P2 code P1 code ( c ) Figure 8-4 Error correction . ( a ) A simple parity check is used . ( b ) A bit in error is at the intersection of two error ...
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