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IBM Journal of Research and Development

Issue 2 • March 1985

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Displaying Results 1 - 11 of 11
  • Microprocessors in brief

    Publication Year: 1985, Page(s):110 - 131
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2601 KB)

    This paper presents a tutorial overview of the past, present, and future of microprocessors and describes the key elements of their structure and operation. It is intended to serve as a technical introduction to the rapidly expanding field of microprocessor and microcomputer technology and to provide an overview of what these elements are, what they can do, and how they do it. The origin and evolu... View full abstract»

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  • Architecture of a digital signal processor

    Publication Year: 1985, Page(s):132 - 139
    Cited by:  Papers (12)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (886 KB)

    A digital signal processor (DSP) is described which achieves high processing efficiency by executing concurrently four functions in every processor cycle: instruction prefetching from a dedicated instruction memory and generation of an effective operand, access to a single-port data memory and transfer of a data word over a common data bus, arithmetic/logic-unit (ALU) operation, and multiplication... View full abstract»

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  • Signal processor chip implementation

    Publication Year: 1985, Page(s):140 - 146
    Cited by:  Papers (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1130 KB)

    Very large microprocessors can now be integrated on a single chip; the integration eliminates packaging delays and is especially attractive for performance-oriented processors such as signal processors. This paper describes a semicustom signal processor chip designed jointly by the IBM France Essonnes and La Gaude laboratories. The logic is implemented from an optimized library of bipolar circuits... View full abstract»

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  • Voice-excited predictive coder (VEPC) implementation on a high-performance signal processor

    Publication Year: 1985, Page(s):147 - 157
    Cited by:  Papers (4)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1262 KB)

    In this paper, we discuss the implementation of a medium-bit-rate linear prediction baseband coder on an IBM bipolar signal processor prototype having a high processing capacity. We show that the implementation of our algorithm requires a processing load of 5 MIPS, with a program size of 5K instructions. We then discuss the application of our coder in a normal telephone environment, which requires... View full abstract»

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  • Personal Instrument (PI)—A PC-based signal processing system

    Publication Year: 1985, Page(s):158 - 169
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1174 KB)

    The Personal Computer (PC) technology has seen an enormous growth in the last two years. Although increasingly viewed as a major productivity tool, the PC is likely to be limited for computation-intensive tasks such as telecommunications and improved human-factors I/O. At the same time, there has been another evolving technology—VLSI realization of general-purpose signal processor (SP) engi... View full abstract»

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  • An approach to DFT calculations using standard microprocessors

    Publication Year: 1985, Page(s):170 - 176
    Cited by:  Papers (5)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (722 KB)

    The use of the DFT as an everyday tool is now commonplace, principally due to advances in hardware technology. Special-purpose VLSI chips for signal processing are available. In this paper, we describe an approach which marries the Winograd Fourier Transform Algorithm (WFTA) with a state-of-the-art 16-bit general-purpose microprocessor for the purpose of DFT calculation. The heart of the approach ... View full abstract»

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  • Image processing applications for geologic mapping

    Publication Year: 1985, Page(s):177 - 187
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1333 KB)

    The use of satellite data, particularly Landsat images, for geologic mapping provides the geologist with a powerful tool. The digital format of these data permits applications of image processing to extract or enhance information useful for mapping purposes. Examples are presented of lithologic classification using texture measures, automatic lineament detection and structural analysis, and use of... View full abstract»

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  • Parameter reduction and context selection for compression of gray-scale images

    Publication Year: 1985, Page(s):188 - 193
    Cited by:  Papers (43)  |  Patents (15)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (809 KB)

    In the compression of multilevel (color or gray) image data, effective compression is obtained economically by judicial selection of the predictor and the conditioning states or contexts which determine what probability distribution to use for the prediction error. We provide a cost-effective approach to the following two problems: (1) to reduce the number of coding parameters to describe a distri... View full abstract»

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  • Regenerative simulation methods for local area computer networks

    Publication Year: 1985, Page(s):194 - 205
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1013 KB)

    Local area computer network simulations are inherently non-Markovian in that the underlying stochastic process cannot be modeled as a Markov chain with countable state space. We restrict attention to local network simulations whose underlying stochastic process can be represented as a generalized semi-Markov process (GSMP). Using “new better than used” distributional assumptions and ... View full abstract»

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  • Recent papers by IBM authors

    Publication Year: 1985, Page(s):206 - 213
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (736 KB)

    Reprints of the papers listed here may usually be obtained by writing directly to the authors. The authors' IBM divisions or groups are identified as follows: CHQ is Corporate Headquarters; CPD, Communication Products Division; DSD, Data Systems Division; ESD, Entry Systems Division; FED, Field Engineering Division; FSD. Federal Systems Division; GPD, General Products Division; GTD, General Techno... View full abstract»

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  • Recent IBM patents

    Publication Year: 1985, Page(s):214 - 216
    IEEE is not the copyright holder of this material | PDF file iconPDF (236 KB)
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Clifford A. Pickover
IBM T. J. Watson Research Center