University of Maryland LibrariesDigital Repository at the University of Maryland
    • Login
    View Item 
    •   DRUM
    • A. James Clark School of Engineering
    • Institute for Systems Research Technical Reports
    • View Item
    •   DRUM
    • A. James Clark School of Engineering
    • Institute for Systems Research Technical Reports
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    A New Deterministic Codebook Structure for CELP Speech Coding

    Thumbnail
    View/Open
    TR_92-135.pdf (222.3Kb)
    No. of downloads: 594

    Date
    1992
    Author
    Yu-Hung Kao
    Baras, John S.
    Metadata
    Show full item record
    Abstract
    Low bit rate, high quality speech coding is a vital part in voicetelecommunication systems. The introduction of CELP (1984) (Codebook Excited Linear Prediction) speech coding provided a feasible way to compress speech data to 4.8 kbps with high quality, but the formidable computational complexity required for real-time processing has prevented its wide application. <p>Using the new deterministic codebook, we reduce the computational complexity of codebook search, which originally accounted for 2/3 of the computational complexity, to negligible. Based on this reduction, we produce an algorithm with complexity of about 5MIPS. It can be implemented in even inexpensive DSP chips, while maintaining the same high quality. In addition to extremely simpleencoding and decoding schemes, this codebook also provides optimalerror tolerance and it doesn't require codebook storage.We hope that this contribution can finally make CELP speech coding a widely applicable and practical technology.
    URI
    http://hdl.handle.net/1903/5309
    Collections
    • Institute for Systems Research Technical Reports

    DRUM is brought to you by the University of Maryland Libraries
    University of Maryland, College Park, MD 20742-7011 (301)314-1328.
    Please send us your comments.
    Web Accessibility
     

     

    Browse

    All of DRUMCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister
    Pages
    About DRUMAbout Download Statistics

    DRUM is brought to you by the University of Maryland Libraries
    University of Maryland, College Park, MD 20742-7011 (301)314-1328.
    Please send us your comments.
    Web Accessibility