| Description |
1 online resource (ix, 182 pages) : illustrations |
| Series |
Lecture notes in electrical engineering ; v. 13 |
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Lecture notes in electrical engineering ; v. 13.
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| Contents |
Cover -- Contents -- 1 Introduction -- 1.1 Scope of the Book -- 1.2 Nature of Speech Signals -- 1.3 Band Limited Speech Signals -- 1.4 Organization of the Book -- 2 Speech Generation -- 2.1 Human Speech Generation Process -- 2.2 Model for the Speech Generation Process -- 2.2.1 Excitation Signal -- 2.2.2 Vocal Tract Filter -- 2.3 Basic Approach for Bandwidth Extension -- 3 Analysis Techniques for Speech Signals -- 3.1 Linear Predictive Analysis -- 3.1.1 Autocorrelation Method -- 3.1.2 Covariance Method -- 3.2 Parametric Representations of the Spectral Envelope -- 3.2.1 Tube Model -- 3.2.2 AR-Coefficients -- 3.2.3 Cepstral Coefficients -- 3.2.4 MFCCs -- 3.2.5 Line Spectral Frequencies -- 3.3 Scalar Speech Features -- 3.3.1 Zero Crossing Rate -- 3.3.2 Gradient Index -- 3.3.3 Fundamental Frequency -- 3.3.4 Kurtosis -- 3.3.5 Spectral Centroid -- 3.3.6 Energy Based Features -- 3.4 Distance Measures -- 3.4.1 Log Spectral Deviation -- 3.4.2 RMS-Log Spectral Deviation -- 3.4.3 Cepstral Distance -- 3.4.4 Likelihood Ratio Distance -- 3.4.5 Itakura Distance -- 3.4.6 Itakura8211;Saito Distance -- 3.4.7 Other Spectral Distance Measures -- 4 Excitation Signal Extension -- 4.1 Estimation of the Narrowband Excitation Signal -- 4.2 Extension Using Non-Linear Characteristics -- 4.2.1 Half-Way Rectification -- 4.2.2 Full-Way Rectification -- 4.2.3 Quadratic Characteristic -- 4.2.4 Cubic Characteristic -- 4.2.5 Tanh Characteristic -- 4.2.6 Benesty Characteristic -- 4.2.7 Adaptive Quadratic Characteristic -- 4.3 Extension Using Spectral Shifting/Modulation Techniques -- 4.3.1 Fixed Spectral Shifting -- 4.3.2 Adaptive Spectral Shifting -- 4.4 Extension Using Function Generators -- 4.4.1 Sine Generators -- 4.4.2 White Noise Generators -- 4.5 Power Adjustment -- 4.6 Discussion -- 5 Broadband Spectral Envelope Estimation -- 5.1 Generation and Preparation of a Training Data Set -- 5.2 Estimation of the Narrowband Spectral Envelope -- 5.3 Estimation of the Broadband Spectral Envelope Using Codebooks -- 5.3.1 Codebook Training and Operation Using AR Coefficients -- 5.3.2 Codebook Training and Operation Using Cepstral Coefficients -- 5.3.3 Codebook Training and Operation Using MFCCs -- 5.3.4 Codebook Training and Operation Using LSFs -- 5.4 Estimation of the Broadband Spectral Envelope Using Neural Networks -- 5.4.1 Training and Operation Using Cepstral Coefficients -- 5.5 Estimation of the Broadband Spectral Envelope Using Linear Mapping -- 5.5.1 Training and Operation Using Cepstral Coefficients -- 5.6 Combined Approach Using Codebook Classification and Linear Mapping -- 5.6.1 Training and Operation Using Cepstral Coefficients -- 5.7 Discussion -- 6 Quality Evaluation -- 6.1 Evaluation of the Excitation Signal Extension -- 6.1.1 Objective Quality Criteria -- 6.1.2 Subjective Quality Criteria -- 6.1.3 Rank Correlation Between Objective and Subjective Results -- 6.2 Evaluation of the Envelope Estimation -- 6.2.1 Objective Quality Criteria -- 6.2.2 Subjective Quality Criteria -- 6.3 Discussion -- 7 Summary -- A Levinson8211;Durbin Recursion -- B LBG-Algorithm -- C Generalized Delta Rule or Standard Backpropagation -- D Stability Check -- E Feature Distributions -- F Evaluation Results -- G Abbreviations and Symbols -- G.1 Abbr |
| Summary |
The authors describe the study and development of several methods for the bandwidth extension of speech signals. The book also focuses on the performance of these methods, using the objective spectral distortion measures |
| Bibliography |
Includes bibliographical references and index |
| Notes |
English |
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Print version record |
| Subject |
Speech processing systems
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Broadband communication systems.
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COMPUTERS -- Information Theory.
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TECHNOLOGY & ENGINEERING -- Signals & Signal Processing.
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Broadband communication systems.
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Speech processing systems.
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Ingénierie.
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Broadband communication systems
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Speech processing systems
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| Form |
Electronic book
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| Author |
Minker, Wolfgang.
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Schmidt, Gerhard, Dipl.-Ing.
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| ISBN |
9780387688992 |
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0387688994 |
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0387688986 |
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9780387688985 |
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1281675423 |
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9781281675422 |
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