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Advanced Motion Compensation For Video Coding Based On Delaunay Meshes
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Book Synopsis Advanced Motion Compensation for Video Coding Based on Delaunay Meshes by : Martina Eckert
Download or read book Advanced Motion Compensation for Video Coding Based on Delaunay Meshes written by Martina Eckert and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the investigative work on an advanced video coder based on the structure of a classical predictive coding scheme, substituting two basic components: a) motion prediction is made with triangle meshes instead of blocks; b) transform coding is realized with discrete wavelet transform instead of DCT. These parts have been investigated separately by many scientists but never before in combination. Within this framework, the author investigated the individual processing of arbitrarily shaped regions with the aim of preferential coding. Here, different types of regions were considered: pre-segmented objects, and regions created with help of the triangle mesh. The mesh regions extract skin-colored areas, or those with a high prediction error to code them with preference in order to achieve locally higher subjective qualities. Results show, that the combination of mesh-based motion prediction and wavelet transform yields better subjective and objective image coding quality than either of them in combination with a block-based technique.
Book Synopsis Motion Estimation for Video Coding by : Indrajit Chakrabarti
Download or read book Motion Estimation for Video Coding written by Indrajit Chakrabarti and published by Springer. This book was released on 2015-01-13 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Video Coding with Superimposed Motion-Compensated Signals by : Markus Flierl
Download or read book Video Coding with Superimposed Motion-Compensated Signals written by Markus Flierl and published by Springer Science & Business Media. This book was released on 2006-04-18 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Appendices 133 A Mathematical Results 133 A.1 Singularities of the Displacement Error Covariance Matrix 133 A.2 A Class of Matrices and their Eigenvalues 134 A.3 Inverse of the Power Spectral Density Matrix 134 A.4 Power Spectral Density of a Frame 136 Glossary 137 References 141 Index 159 Preface This book aims to capture recent advances in motion compensation for - ficient video compression. It investigates linearly combined motion comp- sated signals and generalizes the well known superposition for bidirectional prediction in B-pictures. The number of superimposed signals and the sel- tion of reference pictures will be important aspects of the discussion. The application oriented part of the book employs this concept to the well known ITU-T Recommendation H.263 and continues with the improvements by superimposed motion-compensated signals for the emerging ITU-T R- ommendation H.264 and ISO/IEC MPEG-4 (Part 10). In addition, it discusses a new approach for wavelet-based video coding. This technology is currently investigated by MPEG to develop a new video compression standard for the mid-term future.
Book Synopsis Multiple Reference Motion Compensation by : Athanasios Leontaris
Download or read book Multiple Reference Motion Compensation written by Athanasios Leontaris and published by Now Publishers Inc. This book was released on 2009 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Motion compensation exploits temporal correlation in a video sequence to yield high compression efficiency. Multiple reference frame motion compensation is an extension of motion compensation that exploits temporal correlation over a longer time scale. Devised mainly for increasing compression efficiency, it exhibits useful properties such as enhanced error resilience and error concealment. Multiple Reference Motion Compensation: A Tutorial Introduction and Survey explores different aspects of multiple reference frame motion compensation, including multihypothesis prediction, global motion prediction, improved error resilience and concealment for multiple references, and algorithms for fast motion estimation in the context of multiple reference frame video encoders
Book Synopsis Multi-Frame Motion-Compensated Prediction for Video Transmission by : Thomas Wiegand
Download or read book Multi-Frame Motion-Compensated Prediction for Video Transmission written by Thomas Wiegand and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-Frame Motion-Compensated Prediction for Video Transmission presents a comprehensive description of a new technique in video coding and transmission. The work presented in the book has had a very strong impact on video coding standards and will be of interest to practicing engineers and researchers as well as academics. The multi-frame technique and the Lagrangian coder control have been adopted by the ITU-T as an integral part of the well known H.263 standard and are were adopted in the ongoing H.26L project of the ITU-T Video Coding Experts Group. This work will interest researchers and students in the field of video coding and transmission. Moreover, engineers in the field will also be interested since an integral part of the well known H.263 standard is based on the presented material.
Book Synopsis Rate Control and Advanced Motion Compensation in Video Compression by : King-Wai Chow
Download or read book Rate Control and Advanced Motion Compensation in Video Compression written by King-Wai Chow and published by . This book was released on 1997 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Video Coding Using Nonparametric Motion Compensation Techniques by : Antonio Zúñiga
Download or read book Video Coding Using Nonparametric Motion Compensation Techniques written by Antonio Zúñiga and published by . This book was released on 1995 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Motion Compensation for 2D Object-based Video Coding by : Michael Konstantinos Steliaros
Download or read book Motion Compensation for 2D Object-based Video Coding written by Michael Konstantinos Steliaros and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Motion Modeling for 3D Video Coding by : Nikola Bož̆inović
Download or read book Advanced Motion Modeling for 3D Video Coding written by Nikola Bož̆inović and published by . This book was released on 2006 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Driven by new multimedia applications and the growing demand for more flexible and efficient transmission of video, a new approach to video coding has been recently proposed as an alternative to classical hybrid schemes. Instead of sequential frame-based predictive processing, the new approach is based on spatio-temporal 3D transforms, open-loop non-predictive processing, and embedded quantization and coding. This thesis investigates motion modeling for this new coding environment, as well as the impact of such modeling on both coder design and performance. The first aspect of this thesis deals with video coding based on 3D discrete cosine transform (DCT). We analyze 3D DCT spectrum properties of a globally translating image and show how to use its characteristic footprint for fast and efficient video coding. Previous approaches to 3D DCT video coding have lead to rather modest compression gains due to a limited use of motion characteristics in the transform domain. We develop a coefficient scanning order that adapts to motion, unlike the fixed zig-zag scanning of JPEG. We combine this adaptive scanning with a new 3D quantization model to design a low-complexity 3D DCT video coder. The new coder consistently outperforms MPEG-2 both subjectively and objectively (by more than 1.5 dB) at about 25% reduced complexity, while approaching the performance of MPEG-4 (within 0.8 dB) at less than half computational complexity. The second aspect of this thesis involves the role of motion in emerging video coders based on 3D discrete wavelet transform (DWT) and motion-compensated temporal filtering (MCTF). Motion invertibility, central to the optimality of lifted MCTF implementation, is first investigated. We introduce a metric for invertibility error between two motion fields. We develop advanced motion inversion methods and demonstrate their effectiveness in improving the update lifting step. Experimental results confirm that a better motion inversion, quantified by lower invertibility error, leads to an increase in coding gain up to 0.5 dB over simpler inversion techniques. We propose a new method for occlusion-aware modeling and estimation of motion fields and use it to create an adaptive 3D DWT coding structure. Implicit modeling of occluded/uncovered areas, combined with the use of longer wavelet kernels, improves both the prediction and update lifting steps and results in the overall compression gain of up to 1 dB over a non-adaptive coder.
Book Synopsis Computer Vision - ACCV 2014 Workshops by : C.V. Jawahar
Download or read book Computer Vision - ACCV 2014 Workshops written by C.V. Jawahar and published by Springer. This book was released on 2015-04-10 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt: The three-volume set, consisting of LNCS 9008, 9009, and 9010, contains carefully reviewed and selected papers presented at 15 workshops held in conjunction with the 12th Asian Conference on Computer Vision, ACCV 2014, in Singapore, in November 2014. The 153 full papers presented were selected from numerous submissions. LNCS 9008 contains the papers selected for the Workshop on Human Gait and Action Analysis in the Wild, the Second International Workshop on Big Data in 3D Computer Vision, the Workshop on Deep Learning on Visual Data, the Workshop on Scene Understanding for Autonomous Systems, and the Workshop on Robust Local Descriptors for Computer Vision. LNCS 9009 contains the papers selected for the Workshop on Emerging Topics on Image Restoration and Enhancement, the First International Workshop on Robust Reading, the Second Workshop on User-Centred Computer Vision, the International Workshop on Video Segmentation in Computer Vision, the Workshop: My Car Has Eyes: Intelligent Vehicle with Vision Technology, the Third Workshop on E-Heritage, and the Workshop on Computer Vision for Affective Computing. LNCS 9010 contains the papers selected for the Workshop on Feature and Similarity for Computer Vision, the Third International Workshop on Intelligent Mobile and Egocentric Vision, and the Workshop on Human Identification for Surveillance.
Book Synopsis Block Matching Algorithm for Video Coding by : Mohamed Ghoneim
Download or read book Block Matching Algorithm for Video Coding written by Mohamed Ghoneim and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Mesh Based Modeling of Wavelet Coded Video by :
Download or read book Mesh Based Modeling of Wavelet Coded Video written by and published by . This book was released on 2006 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis, we address the use of deformable meshes for modeling motion in video sequences. A 3-D Discrete Wavelet Transform (DWT) coder which uses motion compensated lifting is used as the framework. Motion invertibility is an important requirement for this framework and the suitability of using meshes over traditional block-based Motion Estimation/Motion Compensation (ME/MC) techniques is demonstrated. The experimental results of our new method show good gains in both subjective and objective video quality when compared to block-based or regular mesh based approaches. The algorithm is incorporated into two commonly used Motion Com pensated Temporal Filtering (MCTF) frameworks, the Haar and the 5/3 wavelet transform and performance is consistent under both methods. The generality of this approach allows its use with other video encoding frameworks effectively with minimal changes. (Abstract shortened by UMI.).
Download or read book Bewährte Mittel, lang zu leben written by and published by . This book was released on 1830 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis H.264 and MPEG-4 Video Compression by : Iain E. Richardson
Download or read book H.264 and MPEG-4 Video Compression written by Iain E. Richardson and published by John Wiley & Sons. This book was released on 2004-02-06 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following on from the successful MPEG-2 standard, MPEG-4 Visual is enabling a new wave of multimedia applications from Internet video streaming to mobile video conferencing. The new H.264 ‘Advanced Video Coding’ standard promises impressive compression performance and is gaining support from developers and manufacturers. The first book to cover H.264 in technical detail, this unique resource takes an application-based approach to the two standards and the coding concepts that underpin them. Presents a practical, step-by-step, guide to the MPEG-4 Visual and H.264 standards for video compression. Introduces the basic concepts of digital video and covers essential background material required for an understanding of both standards. Provides side-by-side performance comparisons of MPEG-4 Visual and H.264 and advice on how to approach and interpret them to ensure conformance. Examines the way that the standards have been shaped and developed, discussing the composition and procedures of the VCEG and MPEG standardisation groups. Focussing on compression tools and profiles for practical multimedia applications, this book ‘decodes’ the standards, enabling developers, researchers, engineers and students to rapidly get to grips with both H.264 and MPEG-4 Visual. Dr Iain Richardson leads the Image Communication Technology research group at the Robert Gordon University in Scotland and is the author of over 40 research papers and two previous books on video compression technology.
Book Synopsis Fully Scalable Video Coding Using Redundant-Wavelet Multihypothesis and Motion-Compensated Temporal Filtering by :
Download or read book Fully Scalable Video Coding Using Redundant-Wavelet Multihypothesis and Motion-Compensated Temporal Filtering written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, a fully scalable video coding system is proposed. This system achieves full temporal, resolution, and fidelity scalability by combining mesh-based motion-compensated temporal filtering, multihypothesis motion compensation, and an embedded 3D wavelet-coefficient coder. The first major contribution of this work is the introduction of the redundant-wavelet multihypothesis paradigm into motion-compensated temporal filtering, which is achieved by deploying temporal filtering in the domain of a spatially redundant wavelet transform. A regular triangle mesh is used to track motion between frames, and an affine transform between mesh triangles implements motion compensation within a lifting-based temporal transform. Experimental results reveal that the incorporation of redundant-wavelet multihypothesis into mesh-based motion-compensated temporal filtering significantly improves the rate-distortion performance of the scalable coder. The second major contribution is the introduction of a sliding-window implementation of motion-compensated temporal filtering such that video sequences of arbitrarily length may be temporally filtered using a finite-length frame buffer without suffering from severe degradation at buffer boundaries. Finally, as a third major contribution, a novel 3D coder is designed for the coding of the 3D volume of coefficients resulting from the redundant-wavelet based temporal filtering. This coder employs an explicit estimate of the probability of coefficient significance to drive a nonadaptive arithmetic coder, resulting in a simple software implementation. Additionally, the coder offers the possibility of a high degree of vectorization particularly well suited to the data-parallel capabilities of modern general-purpose processors or customized hardware. Results show that the proposed coder yields nearly the same rate-distortion performance as a more complicated coefficient coder considered to be state of the art.
Book Synopsis Advanced Motion-Compensated Prediction (MCP) for High-Efficiency Video Coding by : Yi-Wen Chen
Download or read book Advanced Motion-Compensated Prediction (MCP) for High-Efficiency Video Coding written by Yi-Wen Chen and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantization and Motion Compensation for Image and Video Compression by : Barry Dean Andrews
Download or read book Quantization and Motion Compensation for Image and Video Compression written by Barry Dean Andrews and published by . This book was released on 1996 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
