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Multi-frame optimized quantization for high efficiency video coding

Martin Winken, Andre Roth, Heiko Schwarz, Thomas Wiegand
2015 2015 Picture Coding Symposium (PCS)  
Based on this model, the optimization problem is cast in the form of an 1 -regularized least squares problem.  ...  Finally, an extension of the method for spatially scalable video coding using SVC, the scalable extension of H.264/AVC, is presented.  ...  Motion-compensated prediction Just like H.264/AVC, H.265/HEVC uses a motion vector accuracy of one quarterpel.  ... 
doi:10.1109/pcs.2015.7170067 dblp:conf/pcs/WinkenRSW15 fatcat:ej6xxsu7onbgdpf2na4jokhk4u

An optimal quadtree-based motion estimation and motion-compensated interpolation scheme for video compression

G.M. Schuster, A.K. Katsaggelos
1998 IEEE Transactions on Image Processing  
In this paper, we propose an optimal quadtree (QT)based motion estimator for video compression.  ...  We find the optimal QT decomposition and the optimal DVF jointly using the Lagrangian multiplier method and a multilevel dynamic program.  ...  In Section V, we formulate the motion estimation problem and show how the Lagrangian multiplier method can be used to find the optimal solutions on the convex hull of the operational rate distortion curve  ... 
doi:10.1109/83.725359 pmid:18276217 fatcat:bvn2petxafekpdpc3woguhy63i

Bit rate optimization for multi-point video conferencing using embedded zero tree coding

Hakkı Alparslan ILGIN
2006 Communications Faculty Of Science University of Ankara  
In order to obtain best quality for a video, target bit rate is allocated to each video frame optimally by using convex rate-distortion model and Lagrangian optimization.  ...  By using zerotree coding we obtain exact target bit rate.  ...  Here m[i,j] is the motion compensation vectors.  ... 
doi:10.1501/0003165 fatcat:ggixnlju4rdqxjcxxyowpochpi

JPEG2000-Compatible Scalable Scheme for Wavelet-Based Video Coding

Thomas André, Marco Cagnazzo, Marc Antonini, Michel Barlaud
2007 EURASIP Journal on Image and Video Processing  
procedure based on models of rate-distortion curves.  ...  A full compatibility with Motion-JPEG2000, which tends to be a serious candidate for the compression of high-definition video sequences, is ensured.  ...  We also provide an algorithm for modeling rate-distortion curves using the most appropriate smoothing spline.  ... 
doi:10.1155/2007/30852 fatcat:sd4wq7hxgndc3nam6nafjvacwq

JPEG2000-Compatible Scalable Scheme for Wavelet-Based Video Coding

Thomas André, Marco Cagnazzo, Marc Antonini, Michel Barlaud
2007 EURASIP Journal on Image and Video Processing  
procedure based on models of rate-distortion curves.  ...  A full compatibility with Motion-JPEG2000, which tends to be a serious candidate for the compression of high-definition video sequences, is ensured.  ...  We also provide an algorithm for modeling rate-distortion curves using the most appropriate smoothing spline.  ... 
doi:10.1186/1687-5281-2007-030852 fatcat:3hpop3jlrfg3vp3acipjsvufka

One-pass computation-aware motion estimation with adaptive search strategy

Ching-Yeh Chen, Yu-Wen Huang, Chia-Lin Lee, Liang-Gee Chen
2006 IEEE transactions on multimedia  
Last but not least, traditional block matching speed-up methods are also combined to provide much better computation-distortion curves.  ...  The random access flow requires a huge memory size for all macroblocks to store the up-to-date minimum distortions, best motion vectors, and searching steps.  ...  The variance is the SAD between the average intensity of current MB and each pixel intensity of current MB. It is shown that the method using slopes performs better.  ... 
doi:10.1109/tmm.2006.876296 fatcat:iajiaogvjvg3zaod2w5k7ske5i

Joint Motion and Disparity Fields Estimation for Stereoscopic Video Sequences

W. Yang, K. Ngan, J. Lim, K. Sohn
2005 Signal processing. Image communication  
The optimal Lagrange multiplier is determined using the convex hull bisection algorithm under the rate-distortion theory.  ...  The four fields are regularized iteratively under the stereo-motion consistency constraint.  ...  In Fig. 5 , the two curves are the PSNR-DPCM entropy curves for these two methods obtained at different l values.  ... 
doi:10.1016/j.image.2004.12.003 fatcat:jr5lg36nbjemvfbhl424ogkdmy

Determining the regularization parameters for super-resolution problems

Marcelo V.W. Zibetti, Fermín S.V. Bazán, Joceli Mayer
2008 Signal Processing  
We derive a novel method to determine the parameters for regularized super-resolution problems, addressing both the traditional regularized super-resolution problem with single-and multiple-parameters  ...  The resulting fidelity is similar to the quality provided by classical methods such as GCV, L-curve and Evidence, which are computationally expensive.  ...  The complete removal of these distortions requires the use of a robust SR method [47] , or an occlusion and motion error detection and removal procedure [46] .  ... 
doi:10.1016/j.sigpro.2008.06.010 fatcat:rqwjaahbsvauranisvm5j6n23y

Motion Key-Frame Extraction by Using Optimized t-Stochastic Neighbor Embedding

Qiang Zhang, Yi Yao, Dongsheng Zhou, Rui Liu
2015 Symmetry  
In this paper, we use an optimized t-Stochastic Neighbor Embedding (t-SNE for short) algorithm to reduce the data and on this basis extract the key frames.  ...  Key-frame extracting technology has been widely used in the field of human motion synthesis. Efficient and accurate key frames extraction methods can improve the accuracy of motion synthesis.  ...  In this paper, we use an optimized manifold learning method based on t-SNE first presented in [9] to effectively extract key-frames. This method has the following advantages.  ... 
doi:10.3390/sym7020395 fatcat:xwbqhmtig5eo3oqiyyrkr372om

A simple reversed-complexity Wyner-Ziv video coding mode based on a spatial reduction framework

Debargha Mukherjee, Bruno Macchiavello, Ricardo L. de Queiroz, Chang Wen Chen, Dan Schonfeld, Jiebo Luo
2007 Visual Communications and Image Processing 2007  
A detailed rate-distortion analysis and procedure for obtaining the optimal parameters based on a realistic statistical model for the transform coefficients and the side information is also presented.  ...  The core Wyner-Ziv frame coder works on the Laplacian residual of a lowerresolution frame encoded by a regular codec at reduced resolution.  ...  Examples of usage of the syntax element object for reference frames include motion/mode information used for Direct-B prediction for B-frames, and generation of motion vector predictors for fast motion  ... 
doi:10.1117/12.703268 dblp:conf/vcip/MukherjeeMQ07 fatcat:kk3bitdadrdmhevhgfjodgfeqy

Convex optimization for frame-level rate allocation in MV-HEVC

Aniello Fiengo, Giovanni Chierchia, Marco Cagnazzo, Beatrice Pesquet-Popescu
2016 2016 IEEE International Conference on Image Processing (ICIP)  
In this paper, using a recursive rate-distortion model that explicitly takes into account these dependencies, we approach the frame-level rate allocation as a convex optimization problem.  ...  Within this framework, we provide an efficient algorithm for exactly solving the above problem with recent convex optimization tools.  ...  where r is the vector of rates defined as r = r 0 0 , . . . , r 0 N −1 , . . . , r Fig. 2 : 2 The rate distortion curves of the proposed method as well as the rate control in the reference software.  ... 
doi:10.1109/icip.2016.7532740 dblp:conf/icip/FiengoCCP16 fatcat:eiisyntz7fepdju3dc65ct4sbu

Space-Time Video Regularity and Visual Fidelity: Compression, Resolution and Frame Rate Adaptation [article]

Dae Yeol Lee, Hyunsuk Ko, Jongho Kim, Alan C. Bovik
2021 arXiv   pre-print
In this direction, we have studied and developed new models of natural video statistics (NVS), which are useful because high-quality videos contain statistical regularities that are disturbed by distortions  ...  In an extensive empirical study, we found that those paths of space-time displaced frame differences that provide maximal regularity against our NVS model generally align best with motion trajectories.  ...  The optimal space-time regular path is indicated by a red arrow, with the vector values given below each figure.  ... 
arXiv:2103.16771v1 fatcat:76kho56mnzgg3afmhkifqm5tay

Long-Term Memory Motion-Compensated Prediction [chapter]

Thomas Wiegand, Bernd Girod
2001 Multi-Frame Motion-Compensated Prediction for Video Transmission  
Long-term memory motion-compensated prediction extends the spatial displacement vector utilized in block-based hybrid video coding by a variable time delay permitting the use of more frames than the previously  ...  Mathematical inequalities are used to speed up motion estimation while achieving full prediction gain.  ...  Lincoln for useful discussions and their suggestions. They would also like to thank the anonymous reviewers for their comments and suggestions. Prof. Girod  ... 
doi:10.1007/978-1-4615-1487-9_3 fatcat:wwgnu62hkzbn5j3wupkjszshiy

Long-term memory motion-compensated prediction

T. Wiegand, Xiaozheng Zhang, B. Girod
1999 IEEE transactions on circuits and systems for video technology (Print)  
Long-term memory motion-compensated prediction extends the spatial displacement vector utilized in block-based hybrid video coding by a variable time delay permitting the use of more frames than the previously  ...  Mathematical inequalities are used to speed up motion estimation while achieving full prediction gain.  ...  Lincoln for useful discussions and their suggestions. They would also like to thank the anonymous reviewers for their comments and suggestions. Prof. Girod  ... 
doi:10.1109/76.744276 fatcat:2sssrqzaxfgwvfyib4vh2xe3zi

Foveated video compression with optimal rate control

Sanghoon Lee, M.S. Pattichis, A.C. Bovik
2001 IEEE Transactions on Image Processing  
For optimal rate control, we also develop a piecewise -(rate-distortion)/ -(rate-quantization) model. A fast algorithm for searching for an optimal Lagrange multiplier is subsequently presented.  ...  In the simulations, we compare the reconstructed pictures obtained using optimal rate control methods for foveated and normal video.  ...  When using the rate-distortion model, it is possible to reduce the number of encodings to obtain an optimal Lagrange multiplier .  ... 
doi:10.1109/83.931092 pmid:18249671 fatcat:li3gtfk7gzfsxk7tlpxr43tcdq
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