IBM Journal of Research and Development

Issue 4 • July 1999

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Displaying Results 1 - 12 of 12
  • Multimedia technologies in IBM: An overview of this issue [Preface]

    Publication Year: 1999, Page(s):450 - 452
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (429 KB)

    Researchers at IBM have had a long history of innovation in image data processing, an innovation that has influenced international standards, such as JPEG and JBIG, and has also been used to create leading-edge technology for IBM products, such as printers, scanners, and other data processing equipment. However, video and audio data processing received little attention in IBM until the second half... View full abstract»

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  • Requirements for motion-estimation search range in MPEG-2 coded video

    Publication Year: 1999, Page(s):453 - 470
    Cited by:  Papers (9)  |  Patents (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1860 KB)

    The motion-estimation search range required for interframe encoding with the MPEG-2 video compression standard depends on a number of factors, including video content, video resolution, elapsed time between reference and predicted pictures, and, just as significantly, pragmatic considerations in implementing a cost-effective solution. In this paper we present a set of experimental results that pro... View full abstract»

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  • Two-pass MPEG-2 variable-bit-rate encoding

    Publication Year: 1999, Page(s):471 - 488
    Cited by:  Papers (41)  |  Patents (85)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (756 KB)

    Many MPEG-2 encoding applications are real-time; this implies that the video signal must be encoded with no significant lookahead. However, there exist non-real-time applications that do enable us to first analyze a video sequence entirely, and, using the analysis results, to optimize a second encoding pass of the same data. One example of such an application is the digital video disk (DVD), which... View full abstract»

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  • Single-pass constant- and variable-bit-rate MPEG-2 video compression

    Publication Year: 1999, Page(s):489 - 509
    Cited by:  Papers (17)  |  Patents (25)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (948 KB)

    Most real-time MPEG-2 encoders are designed to perform in a constant-bit-rate (CBR) mode, in which buffer constraints are imposed to circumvent large deviations from a desired rate at any instant in time. Although such streams are generally good-quality sequences, certain types of operations or environments call for a more efficient real-time CBR encoder. The first part of the paper describes how ... View full abstract»

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  • Statistical multiplexing using MPEG-2 video encoders

    Publication Year: 1999, Page(s):511 - 520
    Cited by:  Papers (23)  |  Patents (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (300 KB)

    This paper presents a system for statistical multiplexing of several compressed video programs using MPEG-2-compatible video encoders. We propose a new external joint rate control algorithm to dynamically distribute the channel bandwidth among the program encoders such that the video quality is approximately equal in all programs. In our algorithm, the bit rate of each encoder is updated on the ba... View full abstract»

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  • Design of an MPEG-2 transport demultiplexor core

    Publication Year: 1999, Page(s):521 - 532
    Cited by:  Papers (4)  |  Patents (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    A new high-performance MPEG-2 transport demultiplexor hardware architecture is presented which minimizes the support required from a host processor for common tasks such as clock recovery and table section filtering, yet provides an interface for a processor to modify the handling of the incoming transport stream. A common on- chip SRAM is used for temporary storage of transport packets as they ar... View full abstract»

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  • Pseudorandom verification and emulation of an MPEG-2 transport demultiplexor

    Publication Year: 1999, Page(s):533 - 544
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (255 KB)

    This paper describes two complementary approaches to performance verification for an MPEG-2 transport demultiplexor. The performance of such devices is difficult to verify during the design phase because of the many independent bus interfaces to which they may be connected and the numerous operating configurations that may be required. To address these problems, we have devised both a pseudorandom... View full abstract»

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  • Memory reduction for HDTV decoders

    Publication Year: 1999, Page(s):545 - 553
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (406 KB)

    In this paper, we propose a low-cost memory reduction scheme which can reduce the memory requirement for full HDTV decoding from 12 MB to 4 MB. This scheme uses a switchable architecture that allows HDTV decoding with scalable memory reduction ratios. Depending on the input format and the amount of available memory, the scheme performs 1/4 or 1/2 memory reduction or no memory reduction. The 1/2 me... View full abstract»

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  • A framework for programmable overlay multimedia networks

    Publication Year: 1999, Page(s):555 - 577
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1210 KB)

    We present an evolutionary framework for provisioning enhanced network-based multimedia distribution services to a diverse set of receivers. The framework addresses various degrees of heterogeneity among “distribution paths” from content sources to receivers, where a distribution path carries information from a content-aware multicast distribution tree from a source to one or more re... View full abstract»

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  • Evaluation of branch-prediction methods on traces from commercial applications

    Publication Year: 1999, Page(s):579 - 593
    Cited by:  Papers (5)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (623 KB)

    For modern superscalar processors, branch prediction is a must, and there has been significant progress in this field during recent years. For the IBM System ESA/390™ environment, a set of traces exists which represent different kinds of commercial workloads, and they include operating-system interactions. We have used four of these traces to evaluate a large variety of branch-prediction al... View full abstract»

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  • Recent publications by IBM authors

    Publication Year: 1999, Page(s):595 - 601
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (74 KB)

    The information listed here is supplied by the Institute for Scientific Information and other outside sources. Reprints of the papers may be obtained by writing directly to the first author cited. Journals are listed alphabetically by title; papers are listed sequentially for each journal. View full abstract»

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  • Recent IBM patents

    Publication Year: 1999, Page(s):603 - 617
    IEEE is not the copyright holder of this material | PDF file iconPDF (79 KB)
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Rachel D'Annucci Henriquez
IBM T. J. Watson Research Center