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| 1. |
Training for yesterday—or tomorrow? |
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Radio and Electronic Engineer,
Volume 49,
Issue 9,
1979,
Page 419-420
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PDF (277KB)
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DOI:10.1049/ree.1979.0075
出版商:IERE
年代:1979
数据来源: IET
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| 2. |
The importance of standards in broadcasting |
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Radio and Electronic Engineer,
Volume 49,
Issue 9,
1979,
Page 443-447
A.N.Thiele,
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PDF (906KB)
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DOI:10.1049/ree.1979.0076
出版商:IERE
年代:1979
数据来源: IET
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| 3. |
System UHJ: a hierarchy of surround sound transmission systems |
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Radio and Electronic Engineer,
Volume 49,
Issue 9,
1979,
Page 449-459
P.S.Gaskell,
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PDF (1234KB)
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摘要:
The reproduction of sounds from all directions in the horizontal plane, commonly known as surround sound, offers new scope for greater realism of the reproduced sound and a new dimension for creative and dramatic effects. Although a large number of loudspeakers are almost certainly needed to reproduce surround sound convincingly, a worthwhile improvement may be given with just four loudspeakers in a rectangular array, i.e. quadraphony. This paper describes a hierarchical transmission system for quadraphony, System UHJ. Transmission may be by 2−, 2½−, 3− or 4−channels, the high-order channels being added to the base channels, thereby forming a hierarchy of systems. The design and development of the 4–2–4 System HJ is discussed in some detail although this paper necessarily only gives a brief account of the many facets of this involved subject.
DOI:10.1049/ree.1979.0077
出版商:IERE
年代:1979
数据来源: IET
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| 4. |
Optical fibre acoustooptic modulators |
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Radio and Electronic Engineer,
Volume 49,
Issue 9,
1979,
Page 460-466
D.Howard,
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PDF (1010KB)
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摘要:
Coherent light propagating within an optical fibre may be modulated by using a piezoelectric transducer to stress the fibre mechanically.This paper discusses the design and evaluation of this type of optical modulator and compares a number of modulator designs. The paper demonstrates the relative roles of the mechanical properties of the fibre and the component parts of the transducer in determining the modulator performance and points out the differences in design philosophy between modulators employing monomode and multimode fibres. Finally, suggestions are made of ways of significantly improving modulator performance.
DOI:10.1049/ree.1979.0078
出版商:IERE
年代:1979
数据来源: IET
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| 5. |
The characterization of impulsive noise and considerations for a noise-measuring receiver |
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Radio and Electronic Engineer,
Volume 49,
Issue 9,
1979,
Page 467-476
J.D.Parsons,
A.U.H.Sheikh,
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PDF (1185KB)
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摘要:
After reviewing the ways in which impulsive noise is generated and methods by which it may be characterized, parameters suitable for an assessment of system performance are selected. Design considerations are given for equipment suitable for the measurement of these parameters and the effect of limitations in the equipment on the measured parameters is described. Methods of overcoming these limitations are discussed.
DOI:10.1049/ree.1979.0079
出版商:IERE
年代:1979
数据来源: IET
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