Author: Han-gu YŏPublisher:
ISBN:
Category :
Languages : en
Pages : 318
Book Description
A Novel Block-based Motion Estimation Algorithm and Architectures for Inter-frame Video Coding
Author: Han-gu YŏMotion Estimation for Video Coding
Author: Indrajit ChakrabartiPublisher: Springer
ISBN: 331914376X
Category : Technology & Engineering
Languages : en
Pages : 170
Book Description
The need of video compression in the modern age of visual communication cannot be over-emphasized. This monograph will provide useful information to the postgraduate students and researchers who wish to work in the domain of VLSI design for video processing applications. In this book, one can find an in-depth discussion of several motion estimation algorithms and their VLSI implementation as conceived and developed by the authors. It records an account of research done involving fast three step search, successive elimination, one-bit transformation and its effective combination with diamond search and dynamic pixel truncation techniques. Two appendices provide a number of instances of proof of concept through Matlab and Verilog program segments. In this aspect, the book can be considered as first of its kind. The architectures have been developed with an eye to their applicability in everyday low-power handheld appliances including video camcorders and smartphones.
Motion Estimation Techniques for Digital Video Coding
Author: Shilpa MetkarPublisher: Springer Science & Business Media
ISBN: 8132210972
Category : Technology & Engineering
Languages : en
Pages : 70
Book Description
The book deals with the development of a methodology to estimate the motion field between two frames for video coding applications. This book proposes an exhaustive study of the motion estimation process in the framework of a general video coder. The conceptual explanations are discussed in a simple language and with the use of suitable figures. The book will serve as a guide for new researchers working in the field of motion estimation techniques.
Algorithms, Complexity Analysis and VLSI Architectures for MPEG-4 Motion Estimation
Author: Peter M. KuhnPublisher: Springer Science & Business Media
ISBN: 1475744749
Category : Computers
Languages : en
Pages : 242
Book Description
MPEG-4 is the multimedia standard for combining interactivity, natural and synthetic digital video, audio and computer-graphics. Typical applications are: internet, video conferencing, mobile videophones, multimedia cooperative work, teleteaching and games. With MPEG-4 the next step from block-based video (ISO/IEC MPEG-1, MPEG-2, CCITT H.261, ITU-T H.263) to arbitrarily-shaped visual objects is taken. This significant step demands a new methodology for system analysis and design to meet the considerably higher flexibility of MPEG-4. Motion estimation is a central part of MPEG-1/2/4 and H.261/H.263 video compression standards and has attracted much attention in research and industry, for the following reasons: it is computationally the most demanding algorithm of a video encoder (about 60-80% of the total computation time), it has a high impact on the visual quality of a video encoder, and it is not standardized, thus being open to competition. Algorithms, Complexity Analysis, and VLSI Architectures for MPEG-4 Motion Estimation covers in detail every single step in the design of a MPEG-1/2/4 or H.261/H.263 compliant video encoder: Fast motion estimation algorithms Complexity analysis tools Detailed complexity analysis of a software implementation of MPEG-4 video Complexity and visual quality analysis of fast motion estimation algorithms within MPEG-4 Design space on motion estimation VLSI architectures Detailed VLSI design examples of (1) a high throughput and (2) a low-power MPEG-4 motion estimator. Algorithms, Complexity Analysis and VLSI Architectures for MPEG-4 Motion Estimation is an important introduction to numerous algorithmic, architectural and system design aspects of the multimedia standard MPEG-4. As such, all researchers, students and practitioners working in image processing, video coding or system and VLSI design will find this book of interest.
Reconfigurable Architecture for H.264/AVC Variable Block Size Motion Estimation Based on Motion Activity and Adaptive Search Range
Author: Sumedha Gupta KodipyakaPublisher:
ISBN:
Category : Field programmable gate arrays
Languages : en
Pages : 54
Book Description
Motion Estimation (ME) technique plays a key role in the video coding systems to achieve high compression ratios by removing temporal redundancies among video frames. Especially in the newest H.264/AVC video coding standard, ME engine demands large amount of computational capabilities due to its support for wide range of different block sizes for a given macroblock in order to increase accuracy in finding best matching block in the previous frames. We propose scalable architecture for H.264/AVC Variable Block Size (VBS) Motion Estimation with adaptive computing capability to support various search ranges, input video resolutions, and frame rates. Hardware architecture of the proposed ME consists of scalable Sum of Absolute Difference (SAD) arrays which can perform Full Search Block Matching Algorithm (FSBMA) for smaller 4x4 blocks. It is also shown that by predicting motion activity and adaptively adjusting the Search Range (SR) on the reconfigurable hardware platform, the computational cost of ME required for inter-frame encoding in H.264/AVC video coding standard can be reduced significantly.
Motion Estimation Algorithms for Video Compression
Author: Borko FurhtPublisher: Springer Science & Business Media
ISBN: 1461562414
Category : Computers
Languages : en
Pages : 168
Book Description
Video technology promises to be the key for the transmission of motion video. A number of video compression techniques and standards have been introduced in the past few years, particularly the MPEG-1 and MPEG-2 for interactive multimedia and for digital NTSC and HDTV applications, and H.2611H.263 for video telecommunications. These techniques use motion estimation techniques to reduce the amount of data that is stored and transmitted for each frame. This book is about these motion estimation algorithms, their complexity, implementations, advantages, and drawbacks. First, we present an overview of video compression techniques with an emphasis to techniques that use motion estimation, such as MPEG and H.2611H.263. Then, we give a survey of current motion estimation search algorithms, including the exhaustive search and a number of fast search algorithms. An evaluation of current search algorithms, based on a number of experiments on several test video sequences, is presented as well. The theoretical framework for a new fast search algorithm, Densely-Centered Uniform-P Search (DCUPS), is developed and presented in the book. The complexity of the DCUPS algorithm is comparable to other popular motion estimation techniques, however the algorithm shows superior results in terms of compression ratios and video qUality. We should stress out that these new results, presented in Chapters 4 and 5, have been developed by Joshua Greenberg, as part of his M.Sc. thesis entitled "Densely-Centered Uniform P-Search: A Fast Motion Estimation Algorithm" (FAU, 1996).
Block Matching Algorithm for Video Coding
Author: Mohamed GhoneimPublisher: LAP Lambert Academic Publishing
ISBN: 9783659422331
Category :
Languages : en
Pages : 128
Book Description
Motion estimation is a key issue in the field of moving images analysis. In the framework of video coding, it is combined with motion compensation in order to exploit the spatio temporal correlation of image sequences along the motion trajectory. It then achieves one of the most important compression factors of a video coder. By dividing each frame into rectangular blocks, motion vectors are obtained via the block matching algorithms (BMA). The full search algorithm (FS) is a brute force BMA. It searches all possible locations inside the search window in the reference frame to provide an optimal solution. However, its high computational complexity makes it often not suitable for real-time implementation. Many fast but sub-optimal algorithms are introduced to improve the performance of video coders. The present book analyses three prospects of improving the quality of existing video coding schemes. Namely, one at a time optimization, adaptive search stagey and feature domain based criteria.
New Motion Estimation Techniques and Their SIMD Implementations for Video Coding
Author: Chunjiang DuanmuVideo Compression
Author: Amit PanditPublisher: LAP Lambert Academic Publishing
ISBN: 9783659181634
Category :
Languages : en
Pages : 84
Book Description
In this Book, the well-known techniques reducing temporal redundancies in images sequences have been discussed. The most widely used scheme is based on the estimation of motion and compensation with intra frame technique to code the prediction error is discussed in detail. The characteristics and main principles of various approaches are discussed along with advantage and disadvantages. Finally, block based motion estimation techniques that are the most widely used, have been viewed in details. Various industry standard full search and fast search block matching technique have been considered and discussed.The computational complexity and accuracy are the two extremes, so sub-optimal solutions are proposed. The reduction in processing time due to fast search schemes developed is equally supported by advancement in hardware available. In the text some fast novel Block matching algorithms are proposed for reduced complexity and computation as compared to existing and acceptable block matching algorithms
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