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Broadcasting Convention, 1988. IBC 1988., International

Date 23-27 Sept. 1988

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Displaying Results 1 - 25 of 100
  • Development of advanced HD-MAC coding algorithms

    Publication Year: 1988 , Page(s): 54 - 56
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (238 KB)  

    Among the different subprojects of the Eureka 95 HDTV project, subproject 5 has been given the task of formulating the detailed algorithm to be used for coding the HDTV signal into a MAC compatible form to be submitted to the CCIR. The authors describe the organization of the working group within subproject 5, the separation of the problem into its various aspects and the contributions being made by the participating organizations. The main lines of investigations to improve the HD-MAC performances are reported as well as the various options of coding system to which these investigations have given birth, and have been worked out as 'candidate system' by several companies. The procedure used to operate the selection for the final system is reported.<> View full abstract»

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  • HDTV displays: subjective effects of scanning standards and domestic picture sizes

    Publication Year: 1988 , Page(s): 204 - 211
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (378 KB)  

    Describes the results of some subjective tests relating to HDTV displays. The first set of tests investigated the trade-off between display field-rate and number of displayed lines on perceived image quality at a constant line frequency. The second investigated the size of display and viewing distances which could or would be accommodated in the domestic home in practice. This latter test assumed that flat screen displays will be available in a mature HDTV service.<> View full abstract»

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  • The control and monitoring of stereophonic sound with television pictures

    Publication Year: 1988 , Page(s): 336 - 339
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (260 KB)  

    The paper looks very briefly at the many and varied aspects of audio subjectivity; focusses on the main areas that will have the most effect on the viewer, and it suggests some ideas for control and monitoring, with the aim of achieving a consistent and reproduceable stereophonic soundfield for the television viewer. Experience gained in the cinema industry indicates that a one to one relationship between the sound controller and the viewer, or in other words `The soundfield', is of prime importance. In addition there are microphone recording techniques; dynamic range; mono-stereo compatibility; listening levels; the control room and its acoustic response; and, finally, metering and loud speaker monitoring to be considered View full abstract»

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  • Colorimetry and constant luminance coding in a compatible HDMAC system

    Publication Year: 1988 , Page(s): 45 - 48
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (196 KB)  

    The authors consider the establishment of a new colorimetric standard due to the advent of HDTV, and discuss the parameters to be reconsidered. Constant luminance coding is described, and nonlinear preemphasis is explained View full abstract»

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  • Hierarchical NTSC compatible HDTV system architecture-a North American perspective

    Publication Year: 1988 , Page(s): 30 - 33
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (336 KB)  

    The authors describe a possible advanced television (ATV) architecture for North America and define its functional modules and corresponding interfaces. The developed model is recommended as a design tool for standardizing ATV in North America and analysing interrelationships of the functional modules on the economic basis. They propose a `hierarchical' ATV emission system with full NTSC compatibility and HDTV quality. Solutions are recommended for terrestrial broadcast, CATV and satellite. The authors describe a total systems approach to HDTV called HDS-NA (high definition system for North America). The two emission signals of HDS-NA: HDMAC-60 and HDNTSC are characterized. RF alternatives for the terrestrial broadcast of HDTV are also discussed View full abstract»

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  • Videodisc and player for HDMAC

    Publication Year: 1988 , Page(s): 224 - 227
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (180 KB)  

    High definition television standards such as HDMAC require high density storage media. The videodisc medium fulfils this requirement: high-density storage and fast retrieval are achieved. A description of the transparent modulation system for a HDTV video-signal is given. It will be shown that the HDMAC format as developed in the Eureka project is the best solution for HDTV signals on a videodisc. A prototype HDMAC videodisc player is also described View full abstract»

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  • A CCD chip for EFP and colour TV camera applications

    Publication Year: 1988 , Page(s): 152 - 155
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (200 KB)  

    Sony's development of its CCD cameras has been specifically targeted at ENG applications with many units now in use in the broadcasting and production environments. Although the current CCD model is purely intended for ENG application it is possible that both its smear performance and resolution can be further improved. Recent developments have produced two new CCD device structures which provide significant improvements in the latter two areas. The first device is a frame interline transfer CCD (FIT-CCD) which drastically reduces the smear level evident with current technology. Secondly increased pixel resolution is achievable with a new interline transfer CCD (IT-CCD). Both types of CCD have a true electronic shutter capability and these features enhance the application possibilities. The new technology and the improvements afforded are described View full abstract»

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  • Implementation of digital audio in MII format VTR

    Publication Year: 1988 , Page(s): 404 - 413
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (400 KB)  

    A new movement in the field of broadcast VTRs, is the combination of video component Y/C recording with 1/2 `metal tape cassettes to replace the earlier 1' and 3/4" VTR formats. This is expected to be widely adopted for field use and expand rapidly to the studio for production, program delay and on-air play-back. With the introduction of the MII format, Matsushita Electric has taken the lead in this development. The MII format brings a new generation of cassette based VTRs having video performance comparable to 1"C format and with audio capabilities which can be adapted to various sources and usages View full abstract»

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  • The evaluation of narrow-band HDTV transmission standards such as HD-MAC

    Publication Year: 1988 , Page(s): 49 - 53
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (324 KB)  

    The authors consider the concept of quality in HDTV, and discuss design issues in HDTV emission systems. Viewing conditions for HDTV assessments are described, and the application of methodology to HDTV emission systems and compatibly-received pictures is discussed, and the results considered View full abstract»

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  • A radio satellite network

    Publication Year: 1988 , Page(s): 304 - 307
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (204 KB)  

    Macquarie Broadcasting is a national commercial network consisting of five capital sites, Sydney, Melbourne, Adelaide, Brisbane, Canberra and two regional sites of Wollongong and Townsville. In addition to this there are some 35 affiliated stations taking Macquarie programs. Planning and implementation of the project was begun in January 1984 and the last up-link site was completed in December 1986. Initially the network was developed to replace the existing terrestrial system with a more cost effective method of delivery and at the same time provide a higher quality service. However, the situation did not remain this way as it became apparent during the development that the Australian radio industry was in desperate need of an efficient cost effective distribution network. At this point Macquarie began to develop in parallel with its own internal requirements a program distribution system for affiliated radio stations. Due to Aussat's transponder costing, 8 kHz channels were found to be the optimum cost per bandwidth View full abstract»

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  • Towards full quality CCD studio cameras: the last steps

    Publication Year: 1988 , Page(s): 156 - 169
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (616 KB)  

    Since the introduction of lightweight CCD cameras, these have rapidly acquired a large part of the market for news gathering equipment. Their advantages in operation are so important that despite performances sometimes inferior to those of tube cameras, customers' choice is now always for CCD, in an ENG application, which on occasion has led the press to write: CCD=ENG. Since the introduction of the first solid state sensors advances have been considerable, specifications have been much improved and characteristics are now comparable with tubes. Whilst manufacturers' catalogues are now offering a wide range of lightweight cameras, the situation for top of the range studio cameras today is totally the opposite, tube cameras alone being available View full abstract»

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  • HDTV-summary of operational and economic features with a view to international standardization

    Publication Year: 1988 , Page(s): 17 - 20
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (156 KB)  

    The author considers from a system viewpoint the link between production and distribution by taking into account the operational and technical aspects, and the economic aspects of HDTV. Indeed, no study of standardization based solely on the technical aspects is complete without reviewing the economical consequences of the various technical options taken. The author summarizes the economic and operational aspects of HDTV and deduce ways to standardize HDTV worldwide View full abstract»

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  • Radio Data Services in UK Independent Local Radio

    Publication Year: 1988 , Page(s): 316 - 317
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (116 KB)  

    Most professional FM radio transmitters are capable of accepting baseband signals from 40 Hz to 100 kHz. Stereo programme transmissions require a base bandwidth up to 53 kHz, which leaves a potential capacity for other baseband signals in the range 53 to 100 kHz. In the United States this capacity has been exploited for some years, and various systems are in operation under the generic title of Subsidiary Communications Authorisation (SCA) issued by the FCC. In the USA, sub-carriers up to 92 kHz have been used and are possible due to the FM channel spacing used in US frequency assignment planning. In the UK, CCIR Recommendation 450 has been followed due to the need for closer channel spacing limits in the European Frequency Plan. This effectively limits sub-carrier frequencies to a maximum of 76 kHz. The two Independent Local Radio stations for the London area both carry the EBU Radio Data System (RDS) signal on a sub-carrier of 57 kHz, and both stations also carry financial data information services on sub-carriers of 69 kHz. This latter service is known as Radio Teletext View full abstract»

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  • Progress in the development of a digital optical routing system for television studio centres

    Publication Year: 1988 , Page(s): 90 - 94
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (360 KB)  

    A system that uses a combination of optical wavelength-division multiplexing (WDM) and electrical time-division multiplexing (TDM) to distribute signals from all sources to all destinations has been proposed; this combination has become known as the WTDM system. The present paper is a progress report describing the recent development of the WTDM system. It gives an outline of the system and shows why a standards-independent routing system is attractive to broadcasters. It then describes the RACE programme and the BBC-led project that is developing the system. Finally it gives details of the system specification, with particular emphasis on the methods of multiplexing together the different signal formats that will be needed in the television studio centre of the future View full abstract»

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  • Radio Data System (RDS)-the planning and implementation of a new broadcast service (using high reliability systems)

    Publication Year: 1988 , Page(s): 308 - 310
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (160 KB)  

    It was decided that the features chosen must be of maximum benefit to the listener and yet be a minimum cost to the BBC so the following features were chosen: Programme Service (PS); Programme Identification (PI); Alternative Frequency (AF); Other Networks (ON); and Clock Time (CT). Two major problems presented themselves at this stage: the enormous quantity of transmitter sites requiring RDS encoder installations and the complexity of the BBC network system involving national, regional, local and community radio, many of which are `opt-out' services. After careful study of the size of the work required, it was decided to carry out the introduction of RDS in two phases. Phase 1 would provide coverage in England on all network and all local radio transmissions. This phase involved the installation of 98 RDS encoders at 48 sites, and gives approximately 75% population coverage. Phase 2 would be N. Ireland, Scotland and Wales View full abstract»

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  • Test equipment for the measurement of static and dynamic resolutions of television cameras

    Publication Year: 1988 , Page(s): 243 - 247
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (244 KB)  

    Resolution is an important parameter which tends to quantify the ability of a camera to correctly reproduce picture details. Unfortunately, a good static resolution may not necessarily guarantee an acceptable resolution of the camera for moving pictures, and the assessment of the overall quality must consider the dynamic resolution. The purpose of this paper is to report on a test equipment, designed and implemented by the CCETT for the measurement of the dynamic resolution of television cameras View full abstract»

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  • A second generation HDTV camera

    Publication Year: 1988 , Page(s): 170 - 173
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (200 KB)  

    The current Sony high definition camera has been available for some 3 years, during which time it has been used in an enormously varied number of applications. These range from feature film production, to graphic system input source, to multi-camera pop concert shoots. Because of the experience gained from these uses, many of which are commercial productions not laboratory or engineering tests, Sony is able to respond to future needs and requirements. These, together with the technological advances made, result in the new Sony HDVS camera, HDC 300. The technology developed to achieve the new camera is described View full abstract»

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  • Advanced high definition 50 to 60 Hz standard conversion

    Publication Year: 1988 , Page(s): 21 - 24
    Cited by:  Patents (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (264 KB)  

    The authors present an advanced method of performing standard conversion from 50 to 59.94 Hz at a high quality level. The starting point of this work is based on the European proposal of a unique world production standard based on 50 Hz (1152 active lines, 50 Hz, 1:1) and the desire to promote programmes produced according to this standard for use in high definition television (HDTV) in countries with both 50 and 59.94 Hz field rates View full abstract»

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  • Migrating to advanced television in the United States

    Publication Year: 1988 , Page(s): 425 - 428
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (352 KB)  

    Structurally, broadcasting in the United States of America is different from most other places in the world. The structural differences tend to lead to different conclusions about how best to make the transition to advanced television (ATV) when compared to approaches which may be appropriate for other countries. What differentiates the United States is a combination of geography, history, economics, and politics View full abstract»

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  • Towards a world studio standard for high definition television

    Publication Year: 1988 , Page(s): 8 - 11
    Cited by:  Papers (1)  |  Patents (3)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (324 KB)  

    The author considers the precise meaning of high definition for television studios, and discussion approach covering a wide range of system performances. The work carried out by the studio standard project group of the EUREKA 95 programme is considered. The conceptual arrangement of studio equipment and the implementation of a standards hierarchy in the HDTV studio are discussed View full abstract»

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  • HD-MAC coding of high definition television signals

    Publication Year: 1988 , Page(s): 62 - 65
    Cited by:  Papers (2)  |  Patents (6)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (196 KB)  

    The authors discuss the problem of MAC compatible broadcasting of a high definition television (HDTV) signal. The problem of MAC compatible broadcasting is studied as part of the Eureka 95 project and is called HD-MAC coding. The HD-MAC coding system is designed to achieve a bandwidth reduction factor of about 4. The authors describe several techniques that make this possible. The coding system presented is a synthesis of all the possible techniques that are under study. In practice the resulting system may not necessarily incorporate all these described techniques. An additional digital control signal of 1 Mb/sec. is transmitted in the vertical blanking interval. This signal is called the DATV signal where DATV stands for digitally assisted television View full abstract»

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  • DBS in the UK: home reception conditions

    Publication Year: 1988 , Page(s): 200 - 203
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (224 KB)  

    In December 1986, the Independent Broadcasting Authority (IBA) awarded the first franchise for satellite television broadcasting in the UK to British Satellite Broadcasting (BSB). The contract will have a 15-year term from the start of transmission in 1989 and will cover the use of three DBS channels. The EBU D-MAC transmission standard will be used and the project is now in the final planning stage. An investigation has therefore been started by BSB, in conjunction with the IBA, to enable an accurate practical picture to be built up of the kind of installation needed by the consumer to obtain the desired technical quality of the received picture and sound services. The provision of low-cost consumer equipment is an important element in this work View full abstract»

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  • IBC 1988: International Broadcasting Convention (Conf. Publ. No.293)

    Publication Year: 1988
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (40 KB)  

    The following topics were dealt with: HDTV systems and standards; HDTV coding strategiesl studio and outside broadcast facilities; transmitters and antennas; cameras and other studio equipment; DBS systems; measurement technology; HDTV reproduction and display; electronic graphics; visual effects and picture processing; broadcast and interactive information systems; satellite and cable services; sound systems and radio broadcasting; and recording. Abstracts of individual papers can be found under the relevant classification codes in this or other issues View full abstract»

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  • The planning and construction of an HF relay station in Hong Kong-a design for automatic and unattended operation

    Publication Year: 1988 , Page(s): 129 - 132
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (252 KB)  

    Outlines the design philosophy for the BBC's Hong Kong HF relay station and the project management approach used to achieve the planned service benefits. The station design was based on providing two 250 kW HF transmitters and four wideband curtain antennas. To met the service objectives, both transmitters were expected to operate normally with the same programme and into the same service area, but on adjacent broadcast bands. To minimise staff costs the station design features fully automatic control to a preprogrammed schedule. The programme material is originated from Bush House studios in the UK and received in Hong Kong over satellite circuits. The Hong Kong station illustrates a number of important design trends. At HF the scheduled frequency and array changes coupled with the much higher power levels pose more difficult problems. The Hong Kong station also illustrates the growing influence of environmental factors which are now having a major impact on transmitting station planning and design, particularly on HF sites which can be visually and environmentally obtrusive View full abstract»

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  • Distorting the time axis: motion-compensated image processing in the studio

    Publication Year: 1988 , Page(s): 256 - 259
    Cited by:  Papers (2)  |  Patents (6)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (248 KB)  

    Recent advances in VLSI device technology and algorithm development have made it a practical proposition to consider the use of motion compensation techniques in broadcast quality image processing. Such techniques offer the hope of significantly improved picture quality in operations such as standards conversion, and also open the door to new processes such as film motion improvement and high quality slow motion portrayal. The equipment described here will enable many of these processes to be studied in real time on a television signal, and will show which aspects of the algorithms require further refinement. The experience gained from this work will be invaluable when designing equipment for broadcast use View full abstract»

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