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IEEE Transactions on Broadcasting

Issue 2 • Date Jun 1991

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Displaying Results 1 - 6 of 6
  • Detection of colour biases in video images

    Publication Year: 1991, Page(s):69 - 74
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Due to improper use of television broadcast equipment and/or reference whites in colour video cameras, a colour bias is often introduced into a video image. In excessive amounts, this bias is noticeable and can be annoying to the viewer. An attempt to objectively measure the degree and nature of the colour bias is described. By artificially introducing a colour bias into an existing colour image a... View full abstract»

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  • On the sibilance problem in FM sound transmission

    Publication Year: 1991, Page(s):64 - 68
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    An explanation for the sibilant distortion on FM sound transmissions is given. According to the proposed model, the effect is due to an overmodulation of the FM carrier, where the instantaneous frequency is proportional to the modulating signal. Pre-emphasis makes the effect worse, and the broadcast peak program meters do not indicate peaks in random signals. The explanation is backed up by simula... View full abstract»

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  • Use of blind equalization for teletext broadcast systems

    Publication Year: 1991, Page(s):44 - 54
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    A new application of blind equalization that appears to ameliorate the delays and improve the reliability of teletext systems is presented. The compatibility with the existing TV system and the cost-effectiveness of this application were considered for practical purposes. Equalizer adaptation does not require a knowledge of the transmitted data sequence or carrier phase recovery. Therefore, a redu... View full abstract»

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  • A possible frequency planning method and related model calculations for the sharing of VHF band II (87.5-108 MHz) between FM and DAB (digital audio broadcast) systems

    Publication Year: 1991, Page(s):55 - 63
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (968 KB)

    A frequency planning method is proposed that is based on regular lattices derived from factorial rhombic numbers. It is shown theoretically that the spectrum efficiency can be improved by about 30% in comparison to existing broadcast networks. This implies less stringent constraints for frequency multiplexing at the transmitter sites. A frequency plan and model calculations of the network coverage... View full abstract»

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  • The measurement of signal to noise ratio of a television broadcast picture

    Publication Year: 1991, Page(s):35 - 43
    Cited by:  Papers (6)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    The authors present a method by which an estimate of the signal-to-noise ratio of a television broadcast picture can be made using excursions from the mean signal level in both the horizontal and vertical directions. The method depends on a determination of the two-dimensional spectral components of the noise and can yield nonintrusive measurements during normal broadcasts. In addition, the method... View full abstract»

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  • Modelling tropospheric ducting effects on VHF/UHF propagation

    Publication Year: 1991, Page(s):25 - 34
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    The application of the parabolic equation method to range-independent and range-dependent tropospheric propagation modelling problems is demonstrated. The parabolic equation is an approximation to the Helmholtz wave equation which allows progressive calculation of the propagated electromagnetic field as solution is stepped out in range. The solution method described is derived from a technique dev... View full abstract»

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Aims & Scope

IEEE Transactions on Broadcasting covers the field of broadcast technology, including the production, distribution, transmission, and propagation aspects of broadcasting.

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Meet Our Editors

Editor-in-Chief
Yiyan Wu
Communications Research Ctr Canada