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IEEE Transactions on Broadcasting

Issue 1 • March 1992

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Displaying Results 1 - 14 of 14
  • Comments on "The response of circuits to sine-squared pulses: the influence of cutoff" (by C.A. Siocos)

    Publication Year: 1992
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (21 KB)

    A corrected version is given of equation 26, which is intended to describe the response of an ideal lowpass filter, in Appendix III of the above-titled work by Siocos (see ibid., vol.BC-17, p.19, Mar. 1971).<> View full abstract»

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  • A simplified HF field strength prediction procedure for India

    Publication Year: 1992, Page(s):75 - 79
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Field strength measurements of several HF broadcast transmissions were made at New Delhi during 1987-1990 with a view to evolving a simple procedure for estimation of the skywave field strength in the HF bands (3-30 MHz). An attempt has been made using the measured field strength values to arrive at a single combined loss factor which can account for all the losses in excess of basic free space an... View full abstract»

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  • Performance of an error correction scheme for PAL-TV teletext

    Publication Year: 1992, Page(s):43 - 47
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The shortened (272, 190) difference set cyclic code has been adopted for the Japanese teletext system using NTSC vertical blanking periods. This system is known as BEST (burst and random error correction system for teletext) for NTSC-TV systems. A powerful error correction system adopting the (272, 190) code for PAL-TV teletext signals is described. To compare the error correction characteristics ... View full abstract»

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  • Will terrestrial broadcasting survive the HDTV standard?

    Publication Year: 1992, Page(s):69 - 74
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    Key analyses and specifications that the author asserts should have been part of the precertification process for HDTV systems are outlined. As part of the current precertification process, estimates for the channel and equipment impairments and the associated power penalties in the C/N (carrier-to-noise) are not required, the range of BER (bit error rate) for a given EFH (error free hours) is not... View full abstract»

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  • A new, high efficiency, digital, modulation technique for AM or SSB sound broadcasting applications

    Publication Year: 1992, Page(s):38 - 42
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    Saturated pulse-width modulation (SPWM), a form of modulator control signal that uses a flash converter for analog-to-digital conversion, is discussed. SPWM is used to modulate high-power RF amplifiers. The operations of a flash converter, formed from a plurality of comparators, and a ring modulator, an address rotation circuit that performs a controlled sequence defining which comparator commands... View full abstract»

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  • Automatic identification of impairments caused by intermodulation distortion in cable television pictures

    Publication Year: 1992, Page(s):60 - 68
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB)

    The authors study the feasibility of automatically monitoring a television picture for the purpose of knowing whether or not impairments resulting from intermodulation beats are present. They develop a mathematical model for the intermodulation beats and show that the theoretical results confirm the experimental ones. These results show that by using the two-dimensional discrete Fourier transform ... View full abstract»

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  • A voltage-matching method for feeding antenna arrays

    Publication Year: 1992, Page(s):27 - 32
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    A method for feeding antenna arrays is presented. Each element of the array is connected with transmission line sections. The first two sections are connected to a common point where the voltage from both sections is the same. The common point is connected with a new transmission line which is also doing the same with the third section. The procedure is continued until the last common point will b... View full abstract»

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  • Pilot tone aided QPRS systems for digital audio broadcasting

    Publication Year: 1992, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    For fast fading channels, a spectrally efficient technique than can achieve more than 2 b/s/Hz with a built-in fade canceler is proposed. Recent studies show that fading in digital mobile communications can be canceled by adding redundant bits to the customer data or with pilot-aided techniques. This concept is extended to a more spectrally efficient class-IV quadrature partial response signaling ... View full abstract»

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  • Performance evaluation of a teletext system

    Publication Year: 1992, Page(s):48 - 54
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Four parameters are defined to measure the performance of a teletext system, namely, the probability of delivering a message within specified time, the transmission efficiency, the average number of errors per page, and the throughput. Each of them is derived and computational results are presented taking the UK teletext system as an example. These parameters are compared in their ability to chara... View full abstract»

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  • Transhorizon VHF TV signal propagation over mixed land-sea paths

    Publication Year: 1992, Page(s):33 - 37
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    The propagation characteristics of Rupavahini TV transmissions originating from Sri Lanka on channels 5 and 8 and monitored in southern India are studied. The receiving sites are chosen to provide mixed land-sea paths. The propagation characteristics of these mixed paths are influenced by sea-surface refractivity gradients and land-sea interactions. The analysis of the data indicates that differen... View full abstract»

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  • DSC-HDTV broadcasting with upconverted NTSC video

    Publication Year: 1992, Page(s):7 - 11
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    A method of gradually introducing of simulcast digital spectrum-compatible (DSC)-HDTV broadcasting, thereby deferring a significant portion of the investment in new equipment, is described. Starting with a DSC-HDTV transmitter and antenna, all currently used National Television Systems Committee (NTSC) equipment continues to serve with the addition of an NTSC/DSC-HDTV scan converter, the upconvert... View full abstract»

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  • A four-stage FM broadcast audio peak limiter

    Publication Year: 1992, Page(s):55 - 59
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    The design of a peak limiter processor for FM broadcast audio is described. The limiter has four gain control stages. The basic peak limiting function is performed in the first and second stages by a slow-attach-slow-release stage followed by a fast-attack-fast-release stage. Preemphasis control is performed in the third and fourth stages, which are part of a filter that emulates the transmitter p... View full abstract»

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  • An HDTV high performance HARP camera-one inch HDTV HARP camera

    Publication Year: 1992, Page(s):12 - 18
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A high-performance high-definition television camera is described. This camera, which employs a recently developed 1-in HARP pickup tube, provides high-quality pictures and provides 32 times maximum sensitivity compared with an HDTV camera using Saticon tubes. This camera's amplitude response is more than 40% at 800 TV lines. Some unique techniques are developed to correct misregistration precisel... View full abstract»

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  • Hybrid clamping in NTSC digital video equipment

    Publication Year: 1992, Page(s):19 - 26
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    Two algorithms that are suitable for deriving the blanking level of a National Television Systems Committee (NTSC) composite video signal are described. One method consists of averaging digitized color-burst samples taken from successive scan lines. A second method involves processing a group of samples taken from a single burst interval. Either algorithm used in a hybrid clamping arrangement resu... 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