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Broadcasting, IEEE Transactions on

Issue 3 • Date Sep 1989

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Displaying Results 1 - 7 of 7
  • European perspectives on HDTV studio production standards

    Publication Year: 1989 , Page(s): 279 - 283
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (436 KB)  

    The European standardization effort with respect to high-definition television (HDTV) is examined, focusing on production standards. The value of single worldwide HDTV standards is discussed, and a series of multinational research and development projects underway in Europe under the general title `Eureka' is briefly described. Candidates for the worldwide standard are reviewed, and the difficulties of achieving a single standard are considered. The influence of economic and operational factors on the choice is examined. Dual-mode reception and colorimetry are discussed View full abstract»

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  • Method for the computation of interference and distortion levels in satellite FM-TV systems

    Publication Year: 1989 , Page(s): 314 - 321
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (492 KB)  

    A method for the prediction of interference and distortion levels in satellite FM-TV systems is proposed. The procedure, which is based on a statistical model of live video signals, makes it possible to predict the levels of both intersystem interference and intrasystem signal distortion. Statistical properties of video baseband spectra are investigated by evaluating the results of long-term measurements of live satellite TV channels. In particular the joint probability distribution for the random variables describing luminance and chrominance components of the video signal is derived from the measurements. The spectrum of the frequency-modulated signal is then analyzed, and the cumulative distribution of signal distortion due to bandlimiting is computed. Similarly, the distributions of adjacent and cochannel interference levels are calculated with examples illustrating the effects of subcarrier loading and energy dispersion. The procedure is particularly useful for the investigation of relative effects of system parameters on interference and distortion levels View full abstract»

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  • Development of HDTV emission systems in North America

    Publication Year: 1989 , Page(s): 259 - 269
    Cited by:  Papers (5)
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    The North American broadcasting structure and the relationships between the different forms of the media are examined in order to understand the North American approach to high-definition television (HDTV). The processes that are being used to define the appropriate technical systems for HDTV broadcasting are explained. Technical proposals that have been made are summarized View full abstract»

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  • Determination of progression steps in lattice planning method

    Publication Year: 1989 , Page(s): 307 - 313
    Cited by:  Papers (1)  |  Patents (1)
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    The most frequently utilized methods of radio frequency planning are briefly reviewed, and the lattice method (also known as the linear rhombic network method) is examined in detail. Unlike other methods, the lattice planning method offers the possibility of arranging the transmitters according to a mathematical law. The arrangement is such that all the distances between adjacent transmitters are equal and all the channel distances are equal, resulting in equal interference, both in type and level, at each transmitter location. This makes it possible to minimize the interference level during planning View full abstract»

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  • Modeling and performance of the North American Broadcast Teletext System with quasi-synchronous detection

    Publication Year: 1989 , Page(s): 284 - 306
    Cited by:  Papers (2)
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    In vestigial sideband systems the most critical region is the Nyquist region of the receiver response, which is difficult to control in practice, so that synchronous and quasi-synchronous detection are not perfect due to quadrature distortion. The advantages of phase-locked-loop quasi-synchronous detection and the factors influencing their design are discussed. These factors include incidental phase modulation introduced by the Nyquist slope of the receiver IF filter in response to synchronization signals, audio buzz, and the effects of other signal distortions. Analysis, modeling, and computer simulations have been used to study quasi-synchronous detection in Gaussian and impulse noise and multipath environments and to find carrier recovery phase error and teletext system performance curves. Possible improvements to television carrier recovery systems are suggested. It is concluded that well-designed quasi-synchronous carrier recovery loops suffer relatively minor degradations (about 0.5 dB) compared to narrowband (synchronous) carrier recovery, in multipath and noise environments of interest to broadcast teletext application View full abstract»

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  • The evolution of HDTV in the work of the CCIR

    Publication Year: 1989 , Page(s): 250 - 258
    Cited by:  Papers (4)
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    The development of television system standards in the CIR (International Radio Consultative Committee) is reviewed. Background and results of the extraordinary meeting on high-definition television (HDTV) of CCIR Study Group II are presented. The arguments for a global studio standard for HDTV are examined as are the proposals for achieving this objective. The evolution toward digital systems and the preparation of emission/transmission standards is summarized. Cost, size, weight, and time frame are seen to be major constraints View full abstract»

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  • 1125/60 HDTV studio standard intended to be a worldwide unified HDTV standard

    Publication Year: 1989 , Page(s): 270 - 278
    Cited by:  Papers (3)
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    The authors describe the characteristics, of the 1125/60 high-definition television (HDTV) standard and the applications of HDTV, which differ from those of conventional television. They discuss the importance of a worldwide unified studio standard. They describe the development of the 1125/60 standard and efforts to establish it as an international standard. The authors examine the status and future of HDTV as regards equipment, program production, and utilization View full abstract»

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

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Yiyan Wu
Communications Research Ctr Canada