H.264 and MPEG-4 Video Compression phần 1 potx

[...]... 7.2.6 Entropy Coding 7.3 Input and Output 7.3 .1 Interfacing 7.3.2 Pre-processing 7.3.3 Post-processing 7.4 Performance 7.4 .1 Criteria 7.4.2 Subjective Performance 7.4.3 Rate–distortion Performance CONTENTS 16 5 16 5 16 6 16 7 16 9 17 0 17 7 18 4 18 7 19 4 19 5 19 6 19 8 19 8 207 207 211 212 212 216 216 220 220 222 222 225 225 225 226 226 234 238 238 238 2 41 2 41 242 243 246 246 247 2 51 CONTENTS 7.5 7.6 7.7 7.8 7.4.4... to define standard methods of compression encoding and decoding to allow products from different manufacturers to communicate effectively This has led to the development of a number of key International Standards for image and video compression, including the JPEG, MPEG and H.26× series of standards 1. 3 MPEG-4 AND H.264 MPEG-4 Visual and H.264 (also known as Advanced Video Coding) are standards for... standards for video compression, known as ISO/IEC 14 496 Part 2 ( MPEG-4 Visual’) [2] and ITU-T Recommendation H.264/ ISO/IEC 14 496 Part 10 ( H.264 ) [3] MPEG4 Visual and H.264 share the same ancestry and some common features (they both draw on well-proven techniques from earlier standards) but have notably different visions, seeking to improve upon the older standards in different ways The vision of MPEG-4. .. International Standards known as MPEG-4 Visual and H.264 This book aims to provide a clear, practical and unbiased guide to these two standards to enable developers, engineers, researchers and students to understand and apply them effectively Video and image compression is a complex and extensive subject and this book keeps an unapologetically limited focus, concentrating on the standards themselves (and in... final standard under the joint auspices of ISO/IEC (as MPEG-4 Part 10 ) and ITU-T (as Recommendation H.264) in 2003 MPEG-4 Visual and H.264 have related but significantly different visions Both are concerned with compression of visual data but MPEG-4 Visual emphasises flexibility whilst H.264 s emphasis is on efficiency and reliability MPEG-4 Visual provides a highly flexible toolkit of coding techniques and. .. amount of compression of image and video signals Most practical video compression techniques are based on lossy compression, in which greater compression is achieved with the penalty that the decoded signal is not identical to the original The goal of a video compression algorithm is to achieve efficient compression whilst minimising the distortion introduced by the compression process Video compression. .. Richardson is a lecturer and researcher at The Robert Gordon University, Aberdeen, Scotland He was awarded the degrees of MEng (Heriot-Watt University) and PhD (The Robert Gordon University) in 19 90 and 19 99 respectively He has been actively involved in research and development of video compression systems since 19 93 and is the author of over 40 journal and conference papers and two previous books He... Robert Gordon University and advises a number of companies on video compression technology issues Foreword Work on the emerging “Advanced Video Coding” standard now known as ITU-T Recommendation H.264 and as ISO/IEC 14 496 (MPEG-4) Part 10 has dominated the video coding standardization community for roughly the past three years The work has been stimulating, intense, dynamic, and all consuming for those... Further compression can be achieved by encoding the processed data using an entropy coding scheme such as Huffman coding or Arithmetic coding Image and video compression has been a very active field of research and development for over 20 years and many different systems and algorithms for compression and decompression have been proposed and developed In order to encourage interworking, competition and. .. storage and streaming) At the present time there is a lively debate about which (if either) of these standards will come to dominate the market MPEG-4 Visual is the more mature of the two new standards (its first Edition was published in 19 99, whereas H.264 became an International VIDEO COMPRESSION • 3 Standard/Recommendation in 2003) There is no doubt that H.264 can out-perform MPEG-4 Visual in compression . 15 5 5.8 .1 Animated 2D and 3D Mesh Coding 15 5 5.8.2 Face and Body Animation 15 6 5.9 Conclusions 15 6 5 .10 References 15 6 6 H. 264/ MPEG-4 Part 10 15 9 6 .1 Introduction 15 9 6 .1. 1 Terminology 15 9 6.2 The H. 264. Video Compression 3 1. 3 MPEG-4 and H. 264 5 1. 4 This Book 6 1. 5 References 7 2 Video Formats and Quality 9 2 .1 Introduction 9 2.2 Natural Video Scenes 9 2.3 Capture 10 2.3 .1 Spatial Sampling 11 2.3.2.