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Broadcasting, IEEE Transactions on

Issue 3 • Date Sep 1997

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Displaying Results 1 - 12 of 12
  • An initialisation protocol for a CDMA based communications scheme for HFC CATV networks

    Publication Year: 1997 , Page(s): 329 - 338
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (812 KB)  

    An initialization protocol for a CDMA based communications system for hybrid fiber coax (HFC) central antenna television (CATV) networks is described. HFC CATV networks are shared medium access networks, employing the coaxial bus principle between an optical network terminator and the subscriber. To realize access in the upstream direction, a multiple access scheme based on CDMA can be used. However, before access is granted in the upstream direction, each cable modem connected to the coaxial bus needs to undergo a startup procedure at activation of the modem to determine timing and physical layer related settings. The initialization mechanism described performs time synchronization of a modem and the determination of the power the modem should use. Next to these physical layer settings, also the identity of a modem is determined during the initialization process View full abstract»

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  • Novel optical fiber code-division multiple access networks supporting real-time multichannel variable-bit-rate (VBR) video distributions

    Publication Year: 1997 , Page(s): 339 - 349
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1156 KB)  

    we design novel code-division multiple access (CDMA) networks which use strict optical orthogonal codes (OOCs) and incoherent optical processing for multichannel variable-bit-rate (VBR) video broadcasting. The proposed techniques possess the characteristics of fast access tunability and bit-rate flexibility. This in turn can facilitate real-time VBR video distributions for entertainment HDTV applications. Compared with conventional OOCs, the use of strict OOCs can ensure both auto- and cross-correlation constraints to be minimum (i.e., “1”) for multichannel VBR video broadcasting and high-speed photonic switching applications. A parallel-serial hybrid architecture for all-optical tunable decoders (or encoders) is also presented to strict OOCs, which has a fast reconfiguration time to support real-time video applications in high-speed optical fiber CDMA networks View full abstract»

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  • Solid state DTV transmitters

    Publication Year: 1997 , Page(s): 252 - 260
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (940 KB)  

    The developments in RF power transistor technology makes solid state transmitters economically attractive for UHF DTV terrestrial transmissions. These transmitters will probably use silicon bipolar, MOS or silicon carbide static induction transistors (SIT) in the RF power amplifiers. This paper examines these RF transistor technologies. In addition, this paper provides an overview of a typical DTV solid state transmitter. The authors have conducted DTV transmission tests and demonstrations using a silicon carbide, solid state transmitter. This paper provides a brief description of these tests View full abstract»

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  • EIA/NRSC DAR systems subjective tests. I. Audio codec quality

    Publication Year: 1997 , Page(s): 261 - 267
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (824 KB)  

    The method, results and conclusions of subjective tests of the basic audio quality of nine digital audio radio (DAR) systems are presented. These systems were proposed to the EIA/NRSC committees for standardization in the USA. The subjective audio tests were carried out at the Communications Research Centre in Ottawa, Canada for the Electronics Industries Association (EIA). Clear comparative results were obtained. The discussion focuses on the subjective merits of the various systems in relation to bit rate considerations View full abstract»

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  • Harmonic broadcasting for video-on-demand service

    Publication Year: 1997 , Page(s): 268 - 271
    Cited by:  Papers (165)  |  Patents (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (244 KB)  

    Using conventional broadcasting, if we want to support a 120-minute popular movie every 10 minutes, we need 12 video channels. Assuming the set-top box at the client end can buffer portions of the playing video on a disk, pyramid broadcasting schemes can reduce the bandwidth requirements to 5.7 channels. We present a new scheme which only needs 3.2 channels. For a movie with length D minutes, if we want to reduce the viewer waiting time to D/N minutes, we only need to allocate H(N) video channels to broadcast the movie periodically, where H(N) is the harmonic number of N, H(N)=1+1/2+…+1/N. In order to support video-on-demand service for a popular movie, the new scheme greatly reduces the bandwidth requirements View full abstract»

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  • Measuring the end-to-end performance of digital video systems

    Publication Year: 1997 , Page(s): 320 - 328
    Cited by:  Papers (6)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1572 KB)  

    Significant research and development efforts by industry and government laboratories were brought to fruition in 1996 with the approval of the American National Standard (ANSI) T1.801.03 entitled “American National Standard for Telecommunications-Digital Transport of One-Way Video Signals-Parameters for Objective Performance Assessment.” This standard provides a set of objective parameters that have consistently demonstrated high correlation levels with subjective evaluations of digital video impairments. The parameters are technology-independent and may be used to measure the performance of a wide range of digital video compression, storage, and transmission systems. This paper presents an overview of the ANSI T1.801.03 parameters and summarizes other relevant standards activities and contributions View full abstract»

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  • The configuration of TSBB for Koreasat D-DBS (digital direct broadcasting satellite) system

    Publication Year: 1997 , Page(s): 272 - 280
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (688 KB)  

    The TSBB (transmitter station baseband) is one of the main subsystems of the D-DBS system for Koreasat. It pre-processes, compresses, packetizes and multiplexes the program and data sources, and send the multiplexed output to the RF/IF module for transmission. The TSBB has the following characteristics: a video resolution of up to 720×480, optional usage of an aspect ratio between 4×3 and 16×9, closed captioning, and multiple languages (up to 4 languages). The TSBB employs MPEG-2 MP@ML for video compression, and MPEG-1 Layer II for audio compression. Data programs are available at up to 2 Mbps. The TSBB also scrambles programs for subscription and pay-per-view channels. We introduce the system requirements, system design and system implementation for the TSBB. We also show test results for the TSBB functions which include video/audio/data broadcasting and encoder/MUX configuration, and test results for the TSBB performance View full abstract»

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  • Multimedia information broadcasting using digital TV channels

    Publication Year: 1997 , Page(s): 242 - 251
    Cited by:  Papers (6)  |  Patents (14)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (980 KB)  

    The structure of a new system used to broadcast multimedia information within a digital TV channel is outlined. The proposed scheme is based on the the Digital Storage Media Command and Control (DSM-CC) functions, and uses a newly developed protocol that allows to efficiently convey multimedia information. Such information has the same characteristics of HTML files used in WWW environments, as it may contain text, images, sounds and animation organized as an hypertext. The transport structure used is the MPEG-2 Transport Stream, which is the most standardized platform for the development of new digital TV services. A prototype software was developed to encode the file system by means of DSM-CC operations and include it in a MPEG-2 compatible Transport Stream View full abstract»

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  • Topography based design of the T-DAB SFN for a mountainous area

    Publication Year: 1997 , Page(s): 309 - 319
    Cited by:  Papers (5)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (672 KB)  

    A method for designing a terrestrial digital audio broadcasting single frequency network (T-DAB SFN) for a mountainous region is proposed. A computer database and the digital terrain elevation data are used in designing the network. Two fundamental approaches are compared; first, utilization of the existing transmitter sites is maximized by applying the initial cost constraint; then, the coverage percent of the service is forced to approach to 100% by applying the coverage efficiency constraint. Finally, a T-DAB SFN hybrid design procedure optimizing both constraints is proposed. The three design approaches are illustrated on the coverage of the mountainous Istanbul-Ankara highway. The results are compared using a reference cost look up table. The hybrid approach is shown to optimize the initial cost and the coverage efficiency, and can be applied to similar networking problems View full abstract»

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  • On-line broadcast archives for interactive video

    Publication Year: 1997 , Page(s): 288 - 308
    Cited by:  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (868 KB)  

    Delivery of user specified interactive multimedia digital services is drawing worldwide attention. With the availability of a greater number of channels as a result of video compression and the receding geographical barriers, content providers are hard pressed to meet the programme requirements. Broadcast archives are valuable multimedia resource centres, stocking audio and video material of interest to a vast population across the globe. There is a great potential for using these archives for on-line interactive access of these material. The paper describes the system architecture and implementation issues of an on-line broadcast archives management system (OLBAMS) which entails various functions of storage and dissemination, taking advantage of emerging digital technology, viz. video servers, OODBMS, CORBA, MPI video, use of Java applets for set-tops, webTV, or computers View full abstract»

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  • Prediction of reliability of broadcasting transmitter systems

    Publication Year: 1997 , Page(s): 237 - 241
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (360 KB)  

    This paper shows that the SPICE circuit simulation program is a useful tool for predicting the reliability of broadcasting transmitters. A broadcasting system formed of two transmitters fed from a common power supply unit is considered as a vehicle to illustrate the use of the proposed technique. Agreement between the steady-state probabilities obtained using the proposed technique are compared with results obtained using the Laplace transform method View full abstract»

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  • Hardware implementation of a differential QAM modem

    Publication Year: 1997 , Page(s): 281 - 287
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (768 KB)  

    A QAM modem based on certain modifications of the CCITT Recommendation V.29, is presented. A predominantly digital implementation without the use of DSP devices is given. Although the implementation is for telephone bandwidth the idea can be expanded to achieve higher rates. In this design approach the modulation is based on ROM-stored symbols while the demodulation is based on a symbol-by-symbol determination for the recovery of the original information bits. Specifically, the paper refers to a D16QAM design. Most of the stages are digital, a feature that simplifies the VLSI implementation. The synchronisation (timing recovery) is based on a modified phase locked loop 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