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IEEE Communications Magazine

Issue 10 • Date Oct. 1988

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Displaying Results 1 - 7 of 7
  • A framework for defining the quality of communications services

    Publication Year: 1988, Page(s):17 - 23
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (530 KB)

    A framework is described that was developed to help assess communications service quality in a manner that most closely reflects the broad array of performance parameters experienced by customers. Examples of its application are presented. An additional benefit experienced with the use of this framework is a more consistent, disciplined analysis of service parameters, adding to the thoroughness wi... View full abstract»

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  • Transmission quality of evolving telephone services

    Publication Year: 1988, Page(s):24 - 35
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1171 KB)

    Various aspects of transmission quality in evolving telephone services are reviewed and summarized from the customer's point of view. The evolution of the public switched telephone network is described. Quality specification methodology is examined, covering transmission standards, the room environment, and quality measures. Transmission quality in mixed analog and digital operation and in advance... View full abstract»

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  • Quality assessment of speech coding and speech synthesis systems

    Publication Year: 1988, Page(s):36 - 44
    Cited by:  Papers (13)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (797 KB)

    The concept of speech quality assessment is examined. Quality assessment methodologies for speech waveform coding, source coding, and speech synthesis by rule from the viewpoints of naturalness and intelligibility are reviewed. Both subjective and objective measures are considered.<> View full abstract»

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  • The communications highway of the future

    Publication Year: 1988, Page(s):45 - 50
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (637 KB)

    The author considers networks of the future that combine broadband transport with intelligent control and improved customer network management. He examines some of the service requirements related to broadband transport for such a system, with particular emphasis on the performance issues. Voice, visual, and data services are covered. The complexity of the communication environment and the resulti... View full abstract»

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  • Quality assessments for visual service

    Publication Year: 1988, Page(s):51 - 60
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (910 KB)

    Three kinds of visual services, namely highly band-compressed, conventional, and high definition, are considered. Evaluation in terms of factors basic to all three classes are considered. The picture quality scale (PQS) is discussed, and its use in assessing color image coding and coder design is examined. Deterioration of moving images due to blur and to field or frame repetition is addressed. Th... View full abstract»

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  • Quality of band-compressed TV services

    Publication Year: 1988, Page(s):61 - 69
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (830 KB)

    Some typical digital high-efficiency coding algorithms applied to the different types of digital transmission systems are discussed, and the resultant picture quality degradation is examined. Techniques for bit-rate reduction, which is fundamental to high-efficiency coding, are described, namely interframe prediction and conditional picture replenishment, hybrid coding using the discrete cosine tr... View full abstract»

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  • National performance standards for telecommunications services

    Publication Year: 1988, Page(s):70 - 81
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1230 KB)

    Nationally, performance standards for the network portion of telecommunication services are being actively addressed in Committee T1 (or, more specifically, its Performance Technical Subcommittee, T1Q1), which is accredited by the American National Standards Institute and sponsored by the Exchange Carrier Standards Association (ECSA). A brief description of the current structure T1 and T1Q1 is fol... View full abstract»

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IEEE Communications Magazine, considered by most to be their most important member benefit, provides timely information on all aspects of communications: monthly feature articles describe technology, systems, services, market trends, development methods, regulatory and policy issues, and significant global events.

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Osman Gebizlioglu
Huawei Technologies