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Broadcasting Convention, International (Conf. Publ. No. 428)

Date 12-16 Sep 1996

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Displaying Results 1 - 25 of 108
  • Development of a compact DAB receiver design for the consumer market

    Publication Year: 1996 , Page(s): 267 - 271
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (412 KB)  

    Digital audio broadcasting, DAB, service is now available in the UK and elsewhere, but today's receivers are still bulky and expensive. For DAB to emulate the success of other European digital radio standards such as GSM cellular and achieve its global mass market potential, low cost compact receivers are essential. This goal motivated Ensigma and Roke Manor Research to join forces in 1995 to develop a low cost technology approach to enable such products. We describe the process by which this goal is becoming a reality. A three board prototype DAB receiver has been constructed which will shrink to a single board OEM DAB receiver. The paper describes the development process, the receiver functionality and the current status of development View full abstract»

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  • Should we accept anything less than TV quality: visual communication

    Publication Year: 1996 , Page(s): 606 - 611
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (420 KB)  

    This paper surveys experimental and empirical evidence which demonstrates that users of full service networks (FSN) will not be happy with less than TV quality images, especially for personal communication. It examines the technical consequences of these findings, and the implications for mature broadcast networks looking towards new service opportunities. The conclusions of this paper contribute to a more detailed exploration of the larger set of technical considerations. We conclude that whilst no single service will justify the costs of network evolution from broadcast CATV to FSN, the added value of videotelephony and its utility as a component in more complex service offerings make it a candidate for inclusion in any `core service' menu. The experimental findings suggest that to implement videotelephony successfully, and in a manner which responds to real requirements, the video quality must approach TV quality View full abstract»

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  • Transport of uncompressed audio through MPEG systems

    Publication Year: 1996 , Page(s): 456 - 459
    Cited by:  Patents (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (328 KB)  

    Due to concerns about multi-generation capabilities of MPEG audio, Tektronix has made a proposal to SMPTE for standardization of an uncompressed audio stream which can be carried within an MPEG-2 transport stream. This proposal defines an uncompressed audio elementary stream which is high quality (up to 24 bit/sample), multichannel (up to 8 channels) and which has very little overhead beyond the actual audio data View full abstract»

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  • The first Spanish experience on digital terrestrial television broadcasting

    Publication Year: 1996 , Page(s): 196 - 199
    Cited by:  Papers (2)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (380 KB)  

    This paper describes the first Spanish digital terrestrial TV project, called VIDITER (Video Digital Terrenal), oriented to the further introduction of digital terrestrial TV services in Spain. RETEVISION and the Spanish Administration have planned to introduce in Spain digital terrestrial TV at the earliest possible date within the 1997-98 window of opportunity, and in this regard they are combining their efforts, together with other Spanish organizations, in order to start experimental transmissions in the Madrid. The Spanish Administration is also at present working on the preparation of an appropriate regulatory framework for the introduction of those services in Spain. In this sense, RETEVISION and the Spanish Administration are jointly leading the so-called 8k Interest Group, which was established in Madrid View full abstract»

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  • Convergence in action?

    Publication Year: 1996 , Page(s): 7 - 10
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (316 KB)  

    Convergence of broadcasting, publishing, telecommunications and computers into a single industry seems inevitable in the longer term. Digital technology is the source of this convergence. The transition to digital technology, together with the process of convergence, will have profound effects on the technology of broadcasting-not only for delivery systems, but also for content production. Until now, broadcasters have played a dominant role in setting standards for broadcasting. However, major players in the fields of telecommunications and computers already consider broadcasting to be a sub-set of their own industries. The danger is that these new players might try to impose their technologies and standards on broadcasters and content providers. Experience in the Digital Audio Visual Council (DAVIC) suggests that few content providers, and even fewer broadcasters, are taking an active interest in developing specifications for advanced digital audio and video services View full abstract»

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  • Future voice intercom technologies and architectures

    Publication Year: 1996 , Page(s): 438 - 443
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (460 KB)  

    The current expansion of broadcast channels is meteoric and continuous. It follows that the need for programming to fill them will also continue to increase, and much of that will continue to come from studio based and studio controlled environments. The associated voice communications systems are as vital as before, only they now are required to be bigger, wider area, easier to use, and increasingly available on a worldwide basis. Without these communications links, the whole system cannot operate effectively. The paper discusses the impact of digital technology on the current broadcasting studio production and transmission centre voice communications infrastructure. The influence of local area networks (LANs) and wide area networks are discussed, with the perceived need to keep communications simple. The move towards standard operating hardware and software platforms is explored, along with seamless merging of communications systems operation into open, user selected, and seamless voice signal routing through the various transmission media available today. Potential areas of integration with other platforms are explored. These can offer the user operator control, bringing the world to his fingertips through taking advantage of modern network communications systems and new operator interfaces. However, the need to minimise some of the problems and potential pitfalls is apparent, and consideration is made of the ongoing requirement for overall system reliability for this critical communication function View full abstract»

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  • Maintaining sound and picture synchronisation in a digital video environment

    Publication Year: 1996 , Page(s): 431 - 437
    Cited by:  Patents (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (584 KB)  

    In a complex broadcast environment, there are significant problems in trying to maintain the correct synchronisation of the various programme elements throughout the production chain. Individual delays introduced by equipment soon lead to obvious timing errors between the sound and picture and this problem is exacerbated as the signals pass through different production and distribution areas. The BBC has addressed this problem in the analogue production environment by carrying delay information embedded within the signals which is updated whenever any significant delay is added. Where timing correction is required (for example at a studio output), the delay information is used to determine which signal to delay and by how much to achieve synchronism. Since most new major broadcasting installations are now digital in nature rather than analogue, this problem must now be solved in the digital domain. The same technique of using delay information is equally valid and this paper addresses the question of where in a digital signal should the information be carried View full abstract»

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  • An integrated video production system

    Publication Year: 1996 , Page(s): 403 - 408
    Cited by:  Patents (8)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (520 KB)  

    The paper describes how a complete system has been designed and implemented to offer the makers of video productions a complete end to end solution, streamlining the activities of planning, shooting and post production and the key enabling technologies are highlighted View full abstract»

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  • Adapting CATV broadcast networks for broadband interactive symmetrical services

    Publication Year: 1996 , Page(s): 594 - 600
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (696 KB)  

    This paper develops the themes of `demand' for `integrated broadband communications (IBC) services' then analyses the current state of CATV in Europe. The necessary steps in re-engineering mature CATV networks to become full service networks (FSN) in the immediate future are estimated, and a description is provided of an evolutionary strategy for transforming large and mature tree-and-branch CATV networks to IBC, using first the introduction of managed video communications tele-services, fast Internet access, and WAN `cable-LAN-LAN' connections for fast data communications and conferencing services. Some observations are made concerning likely migration paths for distinct network types, and specific solutions known at the present time View full abstract»

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  • Interactive services on MATV systems. Terrestrial return interaction path

    Publication Year: 1996 , Page(s): 215 - 218
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (280 KB)  

    This paper deals with the return channel (return interaction path) based on coaxial (MATV) and terrestrial transmission. The system described is based on three segments: from the end-user to the MATV head-end through the existing coaxial cable; from the head-end to a return channel management centre, by RF over-the-air transmission; and from this management centre to the service provider, through a core network. The paper is focused on the first two segments, describing different scenarios and studying possible solutions. An introduction on interactive services is also presented View full abstract»

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  • The introduction of widescreen television in Europe-the digital transition route

    Publication Year: 1996 , Page(s): 348 - 353
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (496 KB)  

    The transition from the traditional 4:3 to the widescreen 16:9 aspect ratio has been making steady progress in Europe. However, for a complete widescreen transition to be accomplished, the 16:9 format must begin to take advantage of the opportunities offered by the development of digital transmission. There are powerful commercial incentives for broadcasters to shift from analogue to digital transmission : any policy designed to promote 16:9 widescreen must therefore attempt to influence broadcasters' aspect ratio choice in the digital transition. It will be important firstly for broadcasters to transmit their schedule simultaneously in 4:3 analogue and in 16:9 digital widescreen and second for consumers to be encouraged to upgrade to digital via purchasing integrated digital widescreen TV sets rather than by attaching set-top boxes to their existing analogue 4:3 sets View full abstract»

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  • Advantages of SMATV for interactive digital TV

    Publication Year: 1996 , Page(s): 47 - 54
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (476 KB)  

    Great efforts have been made in order to study the required adaptation of the collective antenna installations for digital TV reception. Also, the requirements for digital TV transmissions to be compatible with existing SMATV installations have been identified. Success has been achieved in ensuring the compatibility of SMATV installations with respect to digital TV and the SMATV scenario is considered very important for digital TV reception. The initial effort was performed within the DIGISMATV RACE Project. The need to provide the SMATV users with interactive services is also urgent. A solution for the return channel via a satellite based on a VSAT network and the concept of grouping users is described (based on the studies performed in the framework of the DIGISAT ACTS Project). The flexibility of the MPEG-2 codification and the use of digital technology provides a first experience of interactivity for users, these services are known as advanced broadcasting services, and are now a reality. The article describes the reference model for interactivity based on a satellite solution appropriate for SMATV systems as well as the description of the new advanced DVB satellite services. The advantages of the satellite return channel solution for the implementation of interactive services are also described View full abstract»

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  • DVB conditional access

    Publication Year: 1996 , Page(s): 129 - 135
    Cited by:  Papers (3)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (524 KB)  

    The DVB project's development of common elements of conditional access technology for digital TV is described, including the common scrambling system, Simulcrypt and the common interface. The regulation of conditional access activity in Europe through a European directive built on a DVB consensus position is outlined and the initial market development at the date of writing is described View full abstract»

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  • Multimedia services and data broadcasting via satellite

    Publication Year: 1996 , Page(s): 127 - 128
    Cited by:  Patents (3)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (164 KB)  

    EUTELSAT as well as other service providers (in Europe and North America) in collaboration with industrial partners and research institutions, have been developing since 1995 digital platforms for providing multimedia services via satellite services as well as data broadcasting. In the European case, these digital platforms are based on the same technology as the one used for the emerging digital television and radio, namely: the Digital Video Broadcasting (DVB) and MPEG-2 technology and a specific DVB standard will be finalised by the end of this summer. These platforms will greatly improve the speed of multimedia services to the end users (e.g. up to 2 Mbit/sec per session on an Internet connection) and will provide the possibility of downloading very large files in a very short time (e.g. downloading speeds of up to 40 Mbit/sec) to a very large number of customers. By using the same technology as the one used for digital television and radio, large economies of scale are foreseen, thus making these digital platforms very affordable on both the uplink side and the receiver side (e.g., less than $300 for the receiver kit) View full abstract»

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  • Virtual set: the state of the art

    Publication Year: 1996 , Page(s): 143 - 154
    Cited by:  Patents (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1044 KB)  

    Virtual set technology evolved recently from the traditional blue-box technique and has already started to influence the broadcast industry. The possibility of combining in real time actors and realistic looking, computer generated sets with no physical constraints has significant consequences in both economics and creative design. This paper reviews the technology involved in virtual sets, covering the studio equipment, essential software issues and the production process. It also attempts to define the needs, to make virtual sets a more complete and reliable production tool. Undoubtedly, some information contained in the paper will be quickly outdated by the pace of development of the underlying technologies. However, the informational goal will remain valid, as we hope to reach two kinds of users: the novices to help them demistify the technology; and the users who are already familiar with virtual sets to help them understand better what's behind the scenes View full abstract»

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  • Statistical analysis of picture quality for the digital television broadcasting

    Publication Year: 1996 , Page(s): 337 - 342
    Cited by:  Papers (2)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (440 KB)  

    We have introduced “criticality” as a quantitative measure of the difficulty in digitally coding pictures for the purpose of analyzing picture quality statistically. Because picture quality in digital coding depends greatly on picture characteristics such as spatial details and motion, it is not easy to confirm how well a system performs from only a subjective assessment test, in which a limited number of test sequences are used. A definition of criticality is proposed and results of criticality measurement for SDTV and HDTV broadcast television programs are reported. Also proposed is a method to obtain the statistical distribution of picture quality for television programs in digital broadcasting. By measuring the frequency of occurrence of criticality and relating it to subjective picture quality, it becomes possible to obtain the statistical quality distribution of television programs in digital broadcasting View full abstract»

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  • Software implementation issues in digital integrated receiver decoders

    Publication Year: 1996 , Page(s): 304 - 309
    Cited by:  Patents (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (532 KB)  

    The introduction of digital TV technology in broadcast systems such as satellite, cable and in the future terrestrial TV will require large investments to be made in the provision of digital receivers. The cost to the consumer could be reduced if a single receiver could be used to view transmissions from several sources and providers, rather than the current situation where each service provider specifies their own proprietary solution. This paper discusses the hardware and software requirements of an integrated receiver decoder (IRD) which can be used to display digital broadcasts from different delivery systems. It identifies the structure of the underlying software modules and shows how they would be used by an application. It also addresses the problems caused by multiple conditional access systems and the requirements of applications downloaded to the IRD. Finally conclusions are drawn as to the advantages of an open software architecture, in terms of the availability of third party components View full abstract»

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  • The integration of a newsroom computer system with a server-centred news production system

    Publication Year: 1996 , Page(s): 512 - 518
    Cited by:  Patents (14)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (468 KB)  

    The key to the success of any new product or technology is how well it works with the rest of the plant, how well it integrates into the operational work flow, how well it can meet the broad needs of the producers, directors, reporters, engineers, editors and managers who must work with it every day. This same test will be applied to servers, particularly production servers in news applications. And, because news production requires an integrated system, the success of the server will depend on the record/edit/playback clients as much as it will depend on the server itself. In news production the success of the server-centred production system will depend greatly on how well it integrates with the journalist's newsroom computer system which lies at the heart of contemporary news programme production. This paper is intended to be an exploration of that specific aspect of integration, the linkage between the journalists newsroom computer system and the server-centered video production system. It is a look at what might be rather than a statement of what already is. Much of the technology required to achieve the functions described is already in use producing news programmes every day for broadcasters like Hawaii's KHNL, NorthWest Cable News in Seattle, and New York's CNN Financial News Network. The remainder of the necessary technological developments are already under development View full abstract»

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  • Upgrading CATV systems for interactive services

    Publication Year: 1996 , Page(s): 219 - 229
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1732 KB)  

    The introduction of digital TV simultaneously involves the start of new multimedia services. After having terminated a transmission standard for satellite and cable, the DVB project also set up a specification for the return channel. Many of the new services in question require bidirectional communication channels but the data rate to be transmitted is relatively low, as these data services are mainly asymmetrical. In parallel to the new multimedia services for CATV systems, the CATV network is discovered as an access network for other telecommunication applications. The combination of both aspects allow for interesting synergy effects and will therefore contribute to a cost-efficient usage of these networks. The different ownerships of the individual network sections require careful planning providing definite interfaces at the boundaries of the network sections. A reference model should help to make planning transparent. This paper discusses a “radio in the local loop” DECT system as a subscriber access network for telephony and presents a system for CATV applications as an alternative to microwave radio transmission, based on the same technology. Cable-bound transmission allows for using frequency resources much more economically View full abstract»

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  • The DVB terrestrial (DVB-T) specification and its implementation in a practical modem

    Publication Year: 1996 , Page(s): 255 - 260
    Cited by:  Papers (3)  |  Patents (13)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (668 KB)  

    Key features of the DVB-T specification for digital terrestrial television, jointly agreed in 1996 by broadcasters and manufacturers, are described. The DVB-T builds on the work of several European collaborative projects and uses COFDM to counter the peculiarities of the terrestrial channel. Some issues affecting the receiver cost and feasibility are explained, including details of the effects of local-oscillator phase noise. An experimental modem, built by BBC R&D and used to make the first-ever successful demonstration of DVB-T-compliant transmissions, is outlined View full abstract»

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  • Digital terrestrial television broadcasting with OFDM-a study on the performance of single frequency networks

    Publication Year: 1996 , Page(s): 178 - 183
    Cited by:  Papers (2)  |  Patents (6)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (532 KB)  

    OFDM is expected to be a suitable modulation method for digital terrestrial broadcasting systems. One of the reasons is that it makes it possible to construct a single frequency network (SFN) and to make effective use of the frequency bands. In a SFN environment, however, some receivers will obtain their signals from more than one transmitter. This causes two effects, intersymbol interference and degradation of frequency characteristics due to echoes. This paper describes a theoretical study on the latter effect in a variety of signal numbers, D/U ratios and delays arriving at the receiving antenna and the BER (bit error rate) distribution within the coverage area of SFNs in a variety of the transmitter numbers with computer simulations on a virtual plain. Finally we suggest a method to improve the quality in a coverage area View full abstract»

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  • Progress in plasma display panels for HDTV

    Publication Year: 1996 , Page(s): 506 - 511
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (452 KB)  

    This paper reports the current state of plasma display panel (PDP) work in Japan. This technology is now coming to the market as large, flat panel displays which will have a significant impact on the way in which television pictures are viewed in a domestic environment. It also presents some of the results obtained during the six months spent working at NHK's Science and Technical Research Laboratories in Tokyo, during which time the author was largely concerned with the pixel arrangements of such displays. The DC-PDP technology used in the NHK prototype Hi-Vision display, which will enter volume production through their industrial partner, Matsushita, is explained and contrasted with the AC-PDP technology being used by Fujitsu, and the published plans of these and other manufacturers are discussed View full abstract»

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  • Broadcast economics-television and the economic effects of the introduction of choice

    Publication Year: 1996 , Page(s): 546 - 548
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (420 KB)  

    Germany is the last large economy that introduced commercial television in recent years. As a result, the choice of station, the choice of method of delivery and last but not least, the choice of employer for those entering the industry have had profound effects upon the economy as a whole. The bulk of the effects of this change have taken hold over a remarkably short period of just five years. We discuss the effects that are to be expected from a new type of choice: a choice of technology View full abstract»

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  • The Interactive Digital Multimedia Services domain in ACTS 1995-1998

    Publication Year: 1996 , Page(s): 209 - 214
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (568 KB)  

    Interactive Digital Multimedia Services is the largest domain of the European Union's ACTS programme (Advanced Communication Technology and Services). The work in the domain will have a strong impact on the daily lives of the citizens. The projects cover a substantial part of the converging broadcasting, telecommunications and information technology. ACTS will help the sector actors to maintain and develop further their competitive strength on the basis of pre-competitive, pre-normative and pre-regulatory co-operation. Users will gain an understanding of future services. An overview is presented of the 50 or so projects ordered according to the following topics: multimedia contents manipulation and management; presentation, interaction and storage; transmission media; interworking across different networks; support for commercial services; trials; and transition scenarios/economics View full abstract»

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  • The simultaneous transmission of widescreen and 4:3 programmes

    Publication Year: 1996 , Page(s): 360 - 365
    Cited by:  Patents (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (824 KB)  

    The BBC is considering making the conversion to widescreen as a part of the move to digital television transmission. The digital broadcasts would offer widescreen versions of the BBC's two terrestrial television networks, BBC1 and BBC2, with a large proportion of the programmes made in widescreen. Programmes produced in widescreen would still need to be presented on the PAL analogue transmissions in an acceptable format for the 4:3 viewer. Filling the 4:3 display with the central portion of the widescreen picture is an acceptable solution for some programmes, but it will not work for all material. So the BBC is also proposing to use a half-letterbox format, where the 4:3 viewer is presented with the central portion of the widescreen picture in a 14:9 format. Very few programmes will be presented in 16:9 full-letterbox. The BBC is also investigating how best to display 4:3 programmes on widescreen. It is unlikely that there is a single solution to this problem, and it seems probable that several different techniques will need to be used depending on the nature of the programme View full abstract»

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