Video Coding for Mobile Communications (eBook)
225 Seiten
Elsevier Science (Verlag)
978-0-08-052054-4 (ISBN)
The vision of being able to communicate from anywhere, at any time, and with any type of information is on its way to becoming reality. This natural convergence of mobile communications and multimedia is a field that is expected to achieve unprecedented growth and commercial success. Current wireless communication devices support a number of basic multimedia services (voice, messages, basic internet access), but have coding problems that need to be solved before real-time mobile video communication can be achieved.
Addresses the emerging field of mobile multimedia communications
In order for wireless devices to function, the signals must be coded in standard ways so that the sender and the receiver can communicate. This area of video source coding is one of the key challenges in the worldwide push to deliver full video communications over wireless devices. Video Coding for Mobile Communications reviews current progress in this field and looks at how to solve some of the most important technology issues in the months and years ahead. The vision of being able to communicate from anywhere, at any time, and with any type of information is on its way to becoming reality. This natural convergence of mobile communications and multimedia is a field that is expected to achieve unprecedented growth and commercial success. Current wireless communication devices support a number of basic multimedia services (voice, messages, basic internet access), but have coding problems that need to be solved before "e;real-time"e; mobile video communication can be achieved. - Addresses the emerging field of mobile multimedia communications
Cover 1
Contents 8
Preface 14
About the Authors 20
List of Acronyms 22
Chapter 1. Introduction to Mobile Video Communications 28
1.1 Motivations and Applications 28
1.2 Main Challenges 29
1.3 Possible Solutions 31
Part I: Introduction to Video Coding 34
Chapter 2. Video Coding: Fundamentals 36
2.1 Overview 36
2.2 What Is Video? 36
2.3 Analog Video 36
2.4 Digital Video 40
2.5 Video Coding Basics 44
2.6 Intraframe Coding 55
2.7 Interframe Coding 65
Chapter 3. Video Coding: Standards 70
3.1 Overview 70
3.2 The Need for Video Coding Standards 70
3.3 Chronological Development 71
3.4 The H.263 Standard 76
3.5 The MPEG-4 Standard 99
Part II: Coding Efficiency 118
Chapter 4. Basic Motion Estimation Techniques 120
4.1 Overview 120
4.2 Motion Estimation 120
4.3 Differential Methods 125
4.4 Pel-Recursive Methods 127
4.5 Frequency-Domain Methods 129
4.6 Block-Matching Methods 132
4.7 A Comparative Study 144
4.8 Efficiency of Block Matching at Very Low Bit Rates 149
4.9 Discussion 151
Chapter 5. Warping-Based Motion Estimation Techniques 152
5.1 Overview 152
5.2 Warping-Based Methods: A Review 152
5.3 Efficiency of Warping-Based Methods at Very Low Bit Rates 161
5.4 Discussion 166
Chapter 6. Multiple-Reference Motion Estimation Techniques 168
6.1 Overview 168
6.2 Multiple-Reference Motion Estimation: A Review 169
6.3 Long-Term Memory Motion Compensated Prediction 171
6.4 Discussion 181
Part III: Computational Complexity 184
Chapter 7. Reduced-Complexity Motion Estimation Techniques 186
7.1 Overview 186
7.2 The Need for Reduced-Complexity Motion Estimation 186
7.3 Techniques Based on a Reduced Set of Motion Vector Candidates 188
7.4 Techniques Based on a Reduced-Complexity Block Distortion Measure 190
7.5 Techniques Based on a Subsampled Block Motion Field 191
7.6 Hierarchical Search Techniques 193
7.7 Fast Full-Search Techniques 195
7.8 A Comparative Study 197
7.9 Discussion 200
Chapter 8. The Simplex Minimization Search 202
8.1 Overview 202
8.2 Block Matching: An Optimization Problem 203
8.3 The Simplex Minimization (SM) Optimization Method 204
8.4 The Simplex Minimization Search (SMS) 208
8.5 Simulation Results 210
8.6 Simplex Minimization for Multiple-Reference Motion Estimation 223
8.7 Discussion 229
Part IV: Error Resilience 230
Chapter 9. Error-Resilience Video Coding Techniques 232
9.1 Overview 232
9.2 A Typical Video Communication System 232
9.3 Types of Errors 233
9.4 Effects of Errors 234
9.5 Error Detection 236
9.6 Forward Techniques 237
9.7 Postprocessing (or Concealment) Techniques 246
9.8 Interactive Techniques 251
9.9 Discussion 256
Chapter 10. Error Concealment Using Motion Field Interpolation 258
10.1 Overview 258
10.2 Temporal Error Concealment Using Motion Field Interpolation (MFI) 259
10.3 Temporal Error Concealment Using a Combined BM-MFI Technique 263
10.4 Simulation Results 264
10.5 Temporal Error Concealment for Multiple- Reference Motion- Compensated Prediction 273
10.6 Discussion 282
Appendix A. Fast Block-Matching Algorithms 286
A. 1 Notation and Assumptions 286
A.2 The Two-Dimensional Logarithmic Search (TDL) 287
A.3 The N-Steps Search (NSS) 288
A.4 The One-at-a-Time Search (OTS) 289
A.5 The Cross Search Algorithm (CSA) 290
A.6 The Diamond Search (DS) 292
Bibliography 294
Index 310
| Erscheint lt. Verlag | 13.5.2002 |
|---|---|
| Sprache | englisch |
| Themenwelt | Sachbuch/Ratgeber |
| Informatik ► Theorie / Studium ► Kryptologie | |
| Naturwissenschaften | |
| Technik ► Elektrotechnik / Energietechnik | |
| Technik ► Nachrichtentechnik | |
| ISBN-10 | 0-08-052054-5 / 0080520545 |
| ISBN-13 | 978-0-08-052054-4 / 9780080520544 |
| Haben Sie eine Frage zum Produkt? |
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