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IEE Colloquium on the Future of Mobile Multimedia Communications (Digest No. 1996/248)

6 Dec 1996

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Displaying Results 1 - 11 of 11
  • Robust source coding scheme for image transmission over noisy-channels

    Publication Year: 1996, Page(s):8/1 - 8/6
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (588 KB)

    The requirements of digital transmission systems are now becoming so severe that it is no longer possible to optimize independently the different functions of the system. In fact, a digital transmission system is composed of a source coding, a channel coding and modulation subsystems. The source coding sub-system aims at reducing the redundancy in the “source space” in order to improve... View full abstract»

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  • Aspects of error resilience for block based video coders in multimedia communications

    Publication Year: 1996, Page(s):7/1 - 7/6
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (440 KB)

    There has been a gradually increasing need for using video in multimedia communication services. As there is a big tendency to move towards a third-generation universal telecommunication environment, the necessity to carry video information on mobile networks increases. Since mobile environments naturally impose a high level of hostility against carried intelligence, error resilience techniques mu... View full abstract»

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  • Audio coding for mobile multimedia communications

    Publication Year: 1996, Page(s):11/1 - 11/9
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (744 KB)

    This paper presents some early results from two projects at King's College which examine high quality, low bit rate coding of audio, both music and speech. One approach uses wavelets, which offer advantages over polyphase filter banks in MPEG at low bit rates. The other approach uses the long established linear predictive coding technique, but in a modified guise, with orders significantly higher ... View full abstract»

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  • Error resilient image and video coding for wireless communication systems

    Publication Year: 1996, Page(s):6/1 - 610
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (848 KB)

    This paper reviews some of the techniques available for coding images and video sources with resilience to channel errors. Such techniques remove much of the need for complex high redundancy channel coding, and provide a graceful degradation of performance with decreasing channel quality. The main function of these error resilient techniques is to reduce the propagation of errors within the decode... View full abstract»

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  • The potential and limitations of adaptive modulation over slow Rayleigh fading channels

    Publication Year: 1996, Page(s):10/1 - 10/6
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (392 KB)

    The upper-bound performance of adaptive modulation in Rayleigh mobile radio channels is given and the results of optimisation of the switching levels are presented. The resulting performance is compared with fixed modulation schemes in a narrow-band Rayleigh fading channel. The switching levels are re-optimised for co-channel interference environments and comparison with fixed modulation schemes i... View full abstract»

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  • Achieving the customer's desire, challenges facing designers of future mobile system audio visual services

    Publication Year: 1996, Page(s):5/1 - 5/5
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    The challenge for mobile system designers and network operators is to evolve their business from a predominantly voice based service offering to a communications business able to offer higher bandwidth multi-media voice and data services. It is generally accepted that the next generation mobile system, the Universal Mobile telephone System (UMTS) will support the needs of the emerging information ... View full abstract»

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  • Video coding for mobile communications-MPEG4 perspective

    Publication Year: 1996, Page(s):3/1 - 3/9
    Cited by:  Papers (2)  |  Patents (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (816 KB)

    A number of concurrent evolutions have created the need for new ways to represent, integrate, store and exchange pieces of multimedia information. Perhaps the most important is the deployment of diverse new two-way delivery systems such as fixed broadband and mobile narrow-band services. Secondly, the progress of micro-electronic technology is providing extremely powerful and programmable processo... View full abstract»

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  • Promoting corporate use of wide area mobile multimedia applications

    Publication Year: 1996, Page(s):9/1 - 9/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (268 KB)

    Corporations have been using multimedia communications for longer than they may think as any combination of two or more modes e.g. speech and pictures, can be considered multimedia. Consumer sales of personal computers are now being promoted with the low cost availability of multimedia capabilities which now include voice and music, text, graphics and video. This capability is also being promoted ... View full abstract»

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  • Smart antenna techniques for wireless mobile multimedia services

    Publication Year: 1996, Page(s):12/1 - 12/5
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (476 KB)

    The use of suitable antenna techniques ranging from the less intelligent ones (diversity) to the most complex ones (adaptive array techniques) can significantly contribute in optimising the air interface of wireless local area networks (WLANs) able to support high bit rate services such as multimedia applications. In this paper we review some of the most important antenna techniques and the improv... View full abstract»

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  • Multimedia over mobile networks using the H.324 family

    Publication Year: 1996, Page(s):4/1 - 4/5
    Cited by:  Patents (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (508 KB)

    As mobile terminals become more common in society, the expectations placed on them are becoming more demanding. All of the standard applications of a desktop computer and also on-line applications such as Internet access are now available to the mobile worker. The migration of applications such as video conferencing and interactive multimedia services from fixed network (such as ISDN and General S... View full abstract»

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  • High performance wireless LANs for future multimedia communications

    Publication Year: 1996, Page(s):2/1 - 2/7
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (672 KB)

    A number of new high speed wireless LAN standards are now being developed around the world that will allow data rates of between 24 and 155 Mb/s to be achieved over distances up to 100 m. These radio tails are also being optimised to integrate with fixed, high speed, ATM networks. In Europe, the HIPERLAN type 1 standard has already been drafted and dedicated spectrum has been reserved. The Europea... View full abstract»

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