645 Hits in 7.5 sec

Texture denoising utilized in depth-enhanced multiview video coding

P. Aflaki, D. Rusanovskyy, T. Utriainen, E. Pesonen, M. M. Hannuksela, S. Jumisko-Pyykko, M. Gabbouj
2012 2012 Picture Coding Symposium  
In this study, we applied a locally adaptive filtering in 3D DCT domain to 3 views as a preprocessing stage for encoding.  ...  A bitrate reduction of 9% on average and up to 21.8% was achieved with almost no penalties on subjective perceived quality.  ...  ACKNOWLEDGMENT The authors would like to thank Prof. M. Domañski, et al. for providing Poznan Hall2 sequence and Camera Parameters [13] .  ... 
doi:10.1109/pcs.2012.6213292 dblp:conf/pcs/AflakiRUPHJG12 fatcat:junlraghznahtj32o4k5lt5tca

Perceptually-Driven Video Coding with the Daala Video Codec [article]

Yushin Cho, Thomas J. Daede, Nathan E. Egge, Guillaume Martres, Tristan Matthews, Christopher Montgomery, Timothy B. Terriberry, Jean-Marc Valin
2016 arXiv   pre-print
The Daala project is a royalty-free video codec that attempts to compete with the best patent-encumbered codecs.  ...  We evaluate which tools are easy to integrate into a more traditional codec design, and show results in the context of the codec being developed by the Alliance for Open Media.  ...  Several of the individual tools are also under active consideration for inclusion in AV1, the Alliance for Open Media's first video codec.  ... 
arXiv:1610.02488v1 fatcat:hqthsfsunjdyvfyqh5ukfyajsq

Statistical reconstruction for predictive video coding

Catarina Brites, Vitor Gomes, Joao Ascenso, Fernando Pereira
2014 2014 IEEE Visual Communications and Image Processing Conference  
statistically analyze and characterize it in a very precise way.  ...  DCT Coefficients Statistical Analysis The Laplacian distribution (see (45) ) is typically used to model the distribution of the residual DCT coefficients in predictive video coding [18] .  ...  DCT Coefficients Reconstruction Finally, knowing the DCT coefficient bin bounds, the DCT coefficients are reconstructed using a statistical approach.  ... 
doi:10.1109/vcip.2014.7051624 dblp:conf/vcip/BritesGA014 fatcat:5mjqqebnmjfonfvm3kjlw7vera

Distributed Video Coding using Turbo Trellis Coded Modulation

J. L. Martinez, W. A. R. J. Weerakkody, W. A. C. Fernando, G. Fernandez-Escribano, H. Kalva, A. Garrido
2008 The Visual Computer  
This rise is apparently motivated by the very attractive features of its flexibility for building very low cost video encoders and the very high built-in error resilience when applied over noisy communication  ...  Yet, the compression efficiency of DVC is notably lagging behind the state-of-the-art in video coding and compression, H.264/AVC in particular.  ...  The DVC encoder thus performs a computationally very inexpensive operation enabling a drastically low cost implementation of the signal processor in DVC based video cameras.  ... 
doi:10.1007/s00371-008-0279-z fatcat:qgrjdcqqvjahfgq6tmnwjcthzu

ATSC Video and Audio Coding

G.A. Davidson, M.A. Isnardi, L.D. Fielder, M.S. Goldman, C.C. Todd
2006 Proceedings of the IEEE  
In recent decades, digital video and audio coding technologies have helped revolutionize the ways we create, deliver, and consume audiovisual content.  ...  We first review the motivation for data compression in digital broadcasting.  ...  ACKNOWLEDGMENT The authors would like to thank the anonymous reviewers and the editors whose comments improved early drafts of this paper.  ... 
doi:10.1109/jproc.2005.861715 fatcat:l2cutw4yqvc3rcoq3a4c2vpp7m

A compressive sensing approach to object-based surveillance video coding

Divya Venkatraman, Anamitra Makur
2009 2009 IEEE International Conference on Acoustics, Speech and Signal Processing  
This paper studies the feasibility and investigates various choices in the application of compressive sensing (CS) to object-based surveillance video coding.  ...  Finally we recommend an optimal scheme for a range of bitrates. Experimental results with comparative bitrates-vs-PSNR graphs for the different techniques are presented 1  ...  Either the signal x is sparse in time domain or there exists a 'compressible' 1 This work is supported under I2R-NTU joint R&D (2) Project domain Fig1: Proposed CS framework for surveillance video encoder  ... 
doi:10.1109/icassp.2009.4960383 dblp:conf/icassp/VenkatramanM09 fatcat:mpbzgdnkgzevhcewstiq26c354

Exposing Video Compression History by Detecting Transcoded HEVC Videos from AVC Coding

Shan Bian, Haoliang Li, Tianji Gu, Alex Chichung Kot
2019 Symmetry  
The analysis of video compression history is one of the important issues in video forensics.  ...  In this paper, we propose a novel method based on the statistics of Prediction Units (PUs) to detect transcoded HEVC videos from AVC format.  ...  Acknowledgments: The authors highly appreciate the authors of [19] , L.Yu, Z. Zhang, et al., for their kind help in implementing their method.  ... 
doi:10.3390/sym11010067 fatcat:cvatccerlncknenwfh75ule2ym

Rate-distortion model for motion prediction efficiency in scalable wavelet video coding

Chia-Yang Tsai, Hsueh-Ming Hang
2009 2009 17th International Packet Video Workshop  
A rate-distortion model for motion prediction efficiency in scalable wavelet video coding is proposed in this paper.  ...  Different from the non-scalable video coding, the scalable wavelet video coding needs to operate under multiple bitrate conditions and it has an open-loop structure.  ...  The rate-distortion (R-D) analysis of a scalable wavelet video coder is very different from that of a DCT-based coder owing to the following two issues: inter-scale hybrid coding and open-loop coding structure  ... 
doi:10.1109/packet.2009.5152160 fatcat:777kc4nbwfgv7bxxcp4cjb4l2e

Digital video coding standards and their role in video communications

R. Schafer, T. Sikora
1995 Proceedings of the IEEE  
With the increased commercial interest in video communications the need for international image and video coding standards arose.  ...  The purpose of this paper is to provide an overview of today's image and video coding standards and their role in video communications.  ...  Additional functionalities envisioned attempt to provide: Sufficient temporal random access for very low bitrate audio and video.  ... 
doi:10.1109/5.387092 fatcat:6rwwpfkyazel5j77sniwphd5kq

Hybrid Adaptive Video Steganography Scheme under Game Model

Ke Niu, Jun Li, XiaoYuan Yang, Shuo Zhang, Bo Wang
2019 IEEE Access  
it to embed information in the H.264 residual DCT coefficient block.  ...  This model is used to design a high-security steganography algorithm for an H.264 video. The distortion function in UNIWARD algorithm is improved according to the H.264 video coding characteristics.  ...  But the statistical modeling of the cover itself is very difficult, and in many cases it is not even possible to model accurately.  ... 
doi:10.1109/access.2019.2902464 fatcat:tfg7tlt4mzfq5nzrj367ep46cy

Region-based transform-domain video scrambling

Frederic Dufaux, Touradj Ebrahimi, John G. Apostolopoulos, Amir Said
2006 Visual Communications and Image Processing 2006  
In this paper, we address the problem of scrambling regions of interest in a video sequence.  ...  We target applications such as video surveillance preserving privacy, anonymous video communications, or TV news safeguarding the anonymity of a source.  ...  a source.  ... 
doi:10.1117/12.643048 fatcat:k4lvohtm2vayjmcdtiw4bgfmm4

Efficient Video Coding Using Legacy Algorithmic Approaches

Jianwen Chen, Feng Xu, Yun He, John Villasenor, Yuxing Han, Yan Xu, Yaocheng Rong, Cliff Reader, Jiangtao Wen
2012 IEEE transactions on multimedia  
We show that for high bit rates, a video coding algorithm using a suitable combination of the QM coder and on other methods first published over 20 years ago can deliver video quality rivaling that of  ...  The methods described in this paper are the basis for the recent decision of the MPEG standards group to begin work on what is referred to as the "Type-1 Video Coding" standard, which, in addition to aiming  ...  A 1986 contribution from the German national standards body [48] presented statistical analysis and coding methods for motion vectors.  ... 
doi:10.1109/tmm.2011.2169046 fatcat:3ugiulnkffb3bhrnyzx6hc4pbi

Content-Aware Video Adaptation under Low-Bitrate Constraint

Ming-Ho Hsiao, Yi-Wen Chen, Hua-Tsung Chen, Kuan-Hung Chou, Suh-Yin Lee
2007 EURASIP Journal on Advances in Signal Processing  
In this paper, we propose a novel content-aware video adaptation in order to effectively utilize resource and improve visual perceptual quality.  ...  Finally, the video adaptation scheme dynamically adjusts video bitstream in frame level and object level.  ...  The x-axis is the percentage of original video resolution. Figure 11 : 11 Comparison of visual quality in very low bitrate constraint, that is, 75 kbps.  ... 
doi:10.1155/2007/17179 fatcat:hs4dhuawjrblfjt5yerhrm3eva

CVEPS - a compressed video editing and parsing system

Jianhao Meng, Shih-Fu Chang
1996 Proceedings of the fourth ACM international conference on Multimedia - MULTIMEDIA '96  
Processing digital video directly in the compressed domain has many advantages in terms of storage efficiency, speed, and video quality.  ...  We also present a client-server network based CVEPS implementation. KEYWORDS Compressed domain video manipulation, client-server network based video editing, video content analysis, video indexing.  ...  The video buffer decreases to a very low level after the first I frame of Seg3. When Seg4 is pasted, the buffer starts to have the underflow problem.  ... 
doi:10.1145/244130.244145 dblp:conf/mm/MengC96 fatcat:6lg474fabbbz7aikzuoc2e6p6u

Complexity management for video encoders

Yafan Zhao, Iain E. G. Richardson
2002 Proceedings of the tenth ACM international conference on Multimedia - MULTIMEDIA '02  
video 0 Discrete Cosine Transform (DCT): A transform converting a set of samples from spatial domain to frequency domain.  ...  The accuracy of the DCT output depends very much on the input video signal: the more energy in low-frequency components, the less loss of 58 video quality.  ...  We demonstrate that the reduction in computational complexity is variable and depends on the statistics of the video sequence.  ... 
doi:10.1145/641135.641136 fatcat:noofqis2mradfhpxvtokuf57rq
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