| Document Type
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BL
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| Record Number
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1004170
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| Doc. No
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b758540
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| Main Entry
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Ramamurthy, Karthikeyan N.
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| Title & Author
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MATLAB software for the code excited linear prediction algorithm : : the Federal Standard-1016 /\ Karthikeyan N. Ramamurthy and Andreas S. Spanias.
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| Publication Statement
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San Rafael, Calif. (1537 Fourth Street, San Rafael, CA 94901 USA) :: Morgan & Claypool Publishers,, ©2010.
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| Series Statement
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Synthesis lectures on algorithms and software in engineering,; #3
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| Page. NO
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1 online resource (viii, 99 pages) :: illustrations
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| ISBN
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1608453855
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: 9781608453856
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9781608453849
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| Bibliographies/Indexes
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Includes bibliographical references (pages 93-98).
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| Contents
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1. Introduction to linear predictive coding -- Linear predictive coding -- Vocal tract parameter estimation -- Excitation, gain and pitch period -- Linear prediction parameter transformations -- Long-term prediction -- Analysis-by-synthesis linear prediction -- Code excited linear prediction algorithms -- The Federal Standard-1016 CELP -- Summary
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2. Autocorrelation analysis and linear prediction -- Framing and windowing the input speech -- Computation of autocorrelation lags -- The Levinson-Durbin recursion -- Bandwidth expansion -- Inverse Levinson-Durbin recursion -- Summary
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3. Line spectral frequency computation -- Construction of LSP polynomials -- Computing the zeros of the symmetric polynomial -- Computing the zeros of the anti-symmetric polynomial -- Testing ill-conditioned cases -- Quantizing the line spectral frequencies -- Adjusting quantization to preserve monotonicity -- Summary
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4. Spectral distortion -- Conversion of LSP to direct-form coefficients -- Computation of autocorrelation lags from reflection coefficients -- Calculation of distance measures -- Summary
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5. The codebook search -- Overview of codebook search procedure -- Adaptive codebook search -- Target signal for adaptive codebook search -- Integer delay search -- Sub-multiple/fractional delay search -- Stochastic codebook search -- Target signal for stochastic codebook search -- Search for best codevector -- Bitstream generation -- Summary
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6. The FS-1016 decoder -- Extracting parameters for synthesis -- LP synthesis -- Postfiltering output speech -- Computing distance measures -- Summary -- Bibliography -- Authors' biographies.
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| Abstract
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This book describes several modules of the Code Excited Linear Prediction (CELP) algorithm. The authors use the Federal Standard-1016 CELP MATLAB software to describe in detail several functions and parameter computations associated with analysis-by-synthesis linear prediction. The book begins with a description of the basics of linear prediction followed by an overview of the FS-1016 CELP algorithm. Subsequent chapters describe the various modules of the CELP algorithm in detail. In each chapter, an overall functional description of CELP modules is provided along with detailed illustrations of their MATLAB implementation. Several code examples and plots are provided to highlight some of the key CELP concepts. The MATLAB code within this book can be found at http://www.morganclaypool.com/page/fs1016.
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| Subject
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Coding theory.
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Prediction theory.
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Signal processing-- Mathematical models.
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Speech processing systems-- Mathematical models.
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Vocoder.
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Coding theory.
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COMPUTERS-- Optical Data Processing.
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Electrical Computer Engineering.
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Electrical Engineering.
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Engineering Applied Sciences.
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Prediction theory.
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Signal processing-- Mathematical models.
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Speech processing systems-- Mathematical models.
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Vocoder.
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CELP.
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MATLAB.
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MATLAB.
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| Dewey Classification
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006.454
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| LC Classification
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TK7882.S65R255 2010
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| Added Entry
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Spanias, Andreas.
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