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Broadcasting, IEEE Transactions on

Issue 4 • Date Dec 1991

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Displaying Results 1 - 14 of 14
  • Source coding, channel coding and modulation techniques used in the DigiCipher system

    Page(s): 158 - 161
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    The DigiCipher high-definition television (HDTV) system, an all-digital approach that achieves full HDTV performance with error-free reception in a single 6-MHz television channel is described. The DigiCipher HDTV system is based on discrete cosine transform coding and uses motion prediction techniques to eliminate redundancy in the digital signal, channel equalization to defeat multipath, and error correction to defeat noise and interference. The source signal, source coding, channel coding, modulation, and performance of the system are discussed View full abstract»

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  • HDTV approaches the end game

    Page(s): 121 - 122
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    The diminishing dominance of the United States in the design of high-definition television systems is discussed. The author states that digital high-definition television will become the world standard, and it will happen first in the United States. The ideal digital television system will fit into 6 MHz of spectrum and provide the quality of theatrical 35-mm film in every home View full abstract»

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  • Source coding, channel coding and modulation techniques used in the ADTV system

    Page(s): 166 - 169
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    The three key elements of the advanced digital television (ADTV) system are described. These elements are source coding based on MPEG++ data compression, channel coding based on a prioritized data transport, and modulation techniques based on spectrally shaped QAM. The performance of the ADTV system is discussed View full abstract»

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  • Digital HDTV compression techniques

    Page(s): 131 - 133
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    The roles that digital high-definition television (HDTV) compression techniques play in HDTV applications, such as digital HDTV terrestrial broadcasting, are discussed. Images can be encoded intraframe and/or interframe, depending on the requirement of compression rate and the picture quality. Using source coding, redundancy in the spatial and temporal domains can be greatly reduced while preserving the level of image quality required for the given application View full abstract»

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  • Digital HDTV broadcasting

    Page(s): 123 - 127
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    An introduction is given to papers submitted to a November 1991 meeting of the International Radio Consultative Committee (CCIR) Task Group on high-definition television (HDTV). The purpose of the digital HDTV broadcasting documents is to respond to questions posed in the CCIR. Key issues are harmonization of high resolution imaging standards among applications, compression algorithms, source coding, channel coding, modulation techniques, and spectrum strategy. Since the information provided to the CCIR did not contain block diagrams of the proposed systems, block diagrams of a typical encoder and decoder are provided. The diagrams are not precisely descriptive of any of the proposed systems, but are generally descriptive of all of them View full abstract»

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  • Source coding, channel coding and modulation techniques used in the ATVA-progressive system

    Page(s): 170 - 172
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    The ATVA-progressive system, an all-digital high-definition television system that delivers very high quality pictures to the home within a 6-MHz channel in the presence of noise, ghosts, and frequency distortion is described. The system achieves a high degree of data compression by means of motion compensation and transform/subband coding, and only transform/subband coefficients with significant energy are transmitted. For terrestrial transmission, an all-digital format that uses a single carrier with double sideband suppressed carrier quadrature modulation is used. The source signal, source coding, channel coding, modulation, and performance of the system are discussed View full abstract»

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  • Channel coding for digital HDTV terrestrial broadcasting

    Page(s): 137 - 140
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    In order to transmit the HDTV signal in 6 MHz, the four United States digital HDTV proponents, the DigiCipher, DSC-HDTV, ADTV and ATVA-P systems, are reducing the video data rate of HDTV to 15-17 Mb/s, a compression ratio of approximately 60-70 times. The high compression dictates that channel coding be used to avoid block errors and multiframe error propagation. High efficiency in channel utilization required by the 6-MHz limitation means that the channel must be properly equalized and that the multipath and interfering signals must be severely limited. The channel coding techniques used for error reduction include data interleaving, error detection and replacement, and error correction at different levels of protection for bits and blocks of unequal importance View full abstract»

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  • Comparison of proposed digital HDTV terrestrial broadcasting systems

    Page(s): 145 - 147
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    A table of attributes, characteristics, and processes of digital high-definition television (HDTV) terrestrial broadcasting systems is provided in order to compare the proposed digital systems. The four systems are DigiCipher, DSC-HDTV, ADTV, and ATVA-P. All of the data collected in the table are based on the technical descriptions submitted by the proponents to the United States Federal Communications Commission Advisory Committee on Advanced Television Service View full abstract»

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  • Methods for accommodation of HDTV terrestrial broadcasting

    Page(s): 152 - 157
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    In the United States, consideration is underway to provide for the terrestrial emission of high-definition television (HDTV) signals in the existing VHF/UHF allocations. Analyses show that it may be necessary to reduce cochannel spacings to a minimum of 160 km if the vast majority of existing terrestrial broadcasters are to be accommodated with an HDTV service in addition to their NTSC capability. HDTV coverage and acceptable cochannel interference levels of these spacings are under investigation. Techniques that determine if there is sufficient spectrum to provide for the additional services are described. The techniques include assessments of the need to maintain UHF taboo restrictions currently applied to NTSC, analysis of effective coverage areas, and development of allotment/assignment methodologies View full abstract»

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  • Source coding for digital HDTV terrestrial broadcasting

    Page(s): 134 - 136
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    It is claimed that an all-digital system will provide true high-definition television quality and coverage area equivalent to NTSC without noise and interference. Less transmission power may be required, and the signal will be easy to encrypt. The proposed source coding algorithms are reviewed, and the methods by which they are used in the proposed digital HDTV terrestrial broadcasting systems are discussed View full abstract»

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  • Testing HDTV terrestrial broadcasting systems

    Page(s): 148 - 151
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    The Advanced Television Test Center (ATTC) is a private sector, nonprofit organization created to undertake full, fair, and impartial testing of the various advanced television (ATV) systems that have been proposed as the United States terrestrial broadcast standard. Cable Television Laboratories (CableLabs) organized by the cable television industry operates, in cooperation with ATTC, a state-of-the-art laboratory testing facility capable of thoroughly evaluating the proposed ATV systems when transmitted by cable TV, including both coaxial cable and fiber-optic transmission. Presently there are six systems scheduled for test by the ATTC and CableLabs. The systems and their scheduled test dates are shown. One of the systems is an enhanced NTSC compatible system and the other five are high-definition television (HDTV) simulcast systems. Four of the simulcast systems are digital. Both objective and subjective tests of all six systems are discussed View full abstract»

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  • Interoperability considerations for digital HDTV

    Page(s): 128 - 130
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    It is agreed that digital high-definition television (HDTV) systems have the potential for facilitating interoperability among high-resolution image systems. Selection of an advanced television system that will incorporate attributes needed for interoperability, and harmonize the interchange of still and moving images from diverse sources is discussed. Carefully designed headers and descriptors embedded within the digital HDTV data are described. These can be used to identify the image data to current and future receivers and incorporated within the protocols of telecommunications networks View full abstract»

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  • Modulation for terrestrial broadcasting of digital HDTV

    Page(s): 141 - 144
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    The digital modulation methods used by the DigiCipher, DSC-HDTV, ADTV, and ATVA-P digital high-definition television (HDTV) systems are discussed. Three of the systems use a quadrature amplitude modulation method and the fourth uses a vestigial sideband modulation method. The channel equalization and spectrum sharing of the digital HDTV systems is discussed View full abstract»

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  • Source coding, channel coding and modulation techniques used in the digital spectrum-compatible HDTV system

    Page(s): 162 - 165
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    The digital spectrum-compatible high-definition television (DSC-HDTV) system, a digital HDTV simulcast system designed for United States terrestrial broadcasting on currently unassignable channels, is described. The system uses progressively scanned source signals and is characterized by an effective, high-performance video compression system. Compression includes motion compensation with hierarchical block matching and block transform coding with adaptive quantization according to perceptual criteria. Video compression is designed to simplify the receiver decoding; only a few VLSI chips and only one full frame memory are required. The source signal, source coding, channel coding, modulation, and performance of the system are discussed 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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Editor-in-Chief
Yiyan Wu
Communications Research Ctr Canada