By Topic

IEEE Transactions on Broadcasting

Issue 1 • Date March 1989

Filter Results

Displaying Results 1 - 14 of 14
  • The TV answer viewer response system

    Publication Year: 1989, Page(s):2 - 7
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (509 KB)

    A system recently invented to provide two-way interactive capabilities in the broadcast environment is described. The TVA system provides an independent two-way interactive viewer response system which can be used in conjunction with almost any video distribution technology. Its theory of operation is presented. Response transmissions, response pulse propagation, and TV receiver susceptibility are... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reflection and ghosts in a multitower environment

    Publication Year: 1989, Page(s):8 - 22
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1345 KB)

    The magnitude of reflections in a multitower TV environment and their delay in microseconds are calculated. The objectives of the study were to determine: (1) the principal source of ghosting on Mt. Wilson Calif.; (2) how the reflection can be reduced: (3) what the optimum antenna/tower characteristics are for a novel installation; (4) the effect of polarization on ghosts; and (5) the impact of HD... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Spectrally efficient digital broadcast systems operated in a phase noise environment

    Publication Year: 1989, Page(s):31 - 39
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    High spectral efficiency combined with power efficiency, is a requirement for high speed digital broadcast satellite systems. The effect of the recovered carrier phase noise and the nonlinearity on the performance of 16-QAM (quadrature amplitude modulation) and staggered 16-QAM is investigated and compared. It is found that for the phase noise, 16-QAM is more degraded for a roll-off factor of less... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Theory and methods for design of pulse shapes for broadcast teletext

    Publication Year: 1989, Page(s):40 - 55
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1670 KB)

    The theoretical and practical engineering constraints, considerations, and methods for pulse shape design for North American broadcast teletext transmissions are described. The principles and concepts described are for broadcast over-the-air transmission, but they are also applicable to satellite and cable transmission of broadcast teletext signals. Overall objectives of pulse shape design are sum... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A mobile 12 GHz DBS television receiving system

    Publication Year: 1989, Page(s):56 - 62
    Cited by:  Papers (12)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (861 KB)

    A practical, mobile, 12-GHz direct broadcast satellite (DBS) television receiving system for receivers on vehicles is described. The system is housed in a cylindrical radome of 350 mm height and 862 mm diameter, and it weighs 50 kg. Two pairs of high performance flat-panel antenna units (640*180 mm each) are used to reduce the system. For rapid recatch of DBS, antenna control is based on a gyrosco... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A rejection system for interference in TV reception caused by sporadic-E ionospheric propagation

    Publication Year: 1989, Page(s):63 - 69
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (678 KB)

    A method to cancel interference waves by extracting them from TV signals through quadrature synchronous detection and then transforming the signals with a Hilbert transform method is introduced. The system eliminates interference waves at any frequency within the TV signal band. It is easily applied to rebroadcast stations, since it is possible to cancel interference waves at the intermediate-freq... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Focus quality assessment. I. Numerical measurement

    Publication Year: 1989, Page(s):74 - 76
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (239 KB)

    A simple algorithm is described that determines the focus quality of an image by measuring the maximum brightness gradient present in it. Measurements on actual television pictures are correlated with subjective focus evaluations on the CCIR five-point scale. The excellent correlation between measurement and subjective evaluation indicates the usefulness of the algorithm.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • MF-AM stereo broadcasting: the choice of modulation

    Publication Year: 1989, Page(s):79 - 87
    Cited by:  Papers (1)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (613 KB)

    Several AM stereo transmitting systems have been applied to local radio-broadcasting networks on the MF (medium-frequency) band in the US. These systems represent a certain compromise between two mutually contrary requirements: (i) that the broadcast spectrum be at the MF carrier within the determined boundaries (the channel occupancy criterion), and (ii) that the transmitted signal be compatible ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An analog binary phase modulator suitable for secondary services broadcast

    Publication Year: 1989, Page(s):88 - 96
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (538 KB)

    The modulation characteristics of a simple binary phase modulator with a compensated parasitic amplitude modulation is evaluated analytically and numerically. The modulation characteristic slope, giving the modulator circuit sensitivity is obtained analytically. The evaluation is supported by a small personal computer program package written in BASIC, allowing simple and direct use of the phase de... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Plate and grid modulated HF high-power tuned amplifier with increased efficiency

    Publication Year: 1989, Page(s):97 - 107
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (585 KB)

    The optimal design of a plate- and grid-modulated high-power tuned HF amplifier with increased efficiency is reported. The increased efficiency is achieved by introducing the third harmonic into the drive and output circuits. The analysis is carried out by applying a linear model of the constant plate current characteristics of an HF high-power triode. The initial CW (continuous-wave) working cond... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An approach to the frequency multiplier analysis

    Publication Year: 1989, Page(s):108 - 112
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (263 KB)

    A description is given of a linear model of an HF high-power triode which is used in the design of a tuned high-power amplifier that operates as a frequency multiplier. All the expressions necessary for the balance of power are derived in closed form. Results for a frequency doubler and tripler are presented separately. Diagrams that completely depict the operating mode of such an amplifier are gi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A new generation of 90 Mb/s systems: bandwidth efficient, field tested 16-QAM

    Publication Year: 1989, Page(s):23 - 30
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    16-QAM (quadrature amplitude modulation) digital satellite broadcast equipment and satellite communications (SATCOM) systems that double the spectral efficiency of currently operational satellite links is described. It is shown that with this field-proven system, data transmission at a rate of 90 Mb/s (two multiplexed DS-3 signals) is feasible in a transmission bandwidth of 30 MHz. Extensive opera... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Focus quality assessment. II. Subjective evaluation

    Publication Year: 1989, Page(s):77 - 78
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    For pt.I see ibid., vol.35, no.1, p.74 (1989). Subjective evaluation of 20 actual television pictures using a five-point grading scale is reported. The main purpose of the study was to determine on if subjects could successfully evaluate focus quality on the grading scale and if so, what parameters are used by subjects in the evaluation. Multidimensional scaling was used to determine dimension use... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Implementing FMX broadcasting at your station

    Publication Year: 1989, Page(s):70 - 73
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    A description is given of what FMX stereo radio broadcasting can and cannot do. Encoding specifications, compatibility with other subcarrier services, transmitter tuning, and separation compatibility are discussed. The cause and effect relationships of the various transmission impairments of FMX compatibility are summarized. Reception improvements are identified View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

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

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Yiyan Wu
Communications Research Ctr Canada