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International Conference on Control, Engineering & Information Technology

作者： Benaissa Manel SP-Lab Department of Electronics University of Constantine 1

ISBN: (纸本)9781479982134

distributed video coding (DVC) is a recent paradigm of video coding, based on distributed source coding and side information (SI) generated at the Decoder. Most of the DVC schemes are using complex channel codes such as LDPC or Turbo codes, which are increasing the decoder complexity and delay. Many searches have been done to simplfy the coding schemes, one of them was done by replacing the channel coding by a simple source coding. In this paper, we taken one of those DVC schemes which is based on block classification at the decoder combined with a new residual computing method based on modular arithmetic in conjunction with simple entropy coding. And, we propose to improve its performance by using a mode decision at the encoder side in addition to a parametric change in the residual computing method, with keeping the simplicity of source coding.

关键词： distributed video coding Differential representation Block classification Mode decision

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distributed coding with sorting and assignment

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SIGNAL IMAGE AND video PROCESSING 2025年第6期19卷 1-11页

作者： Debbache, Soumia Benierbah, Said SP LAB Univ Mentouri Signal Proc Lab Constantine Algeria

We propose a new way to perform distributed source coding by using sorting in coding and assignment for decoding. Specifically, sorting the symbols will separate information into values and positions. The decoder will use an assignment algorithm that exploits side information to try to recover the original positions of the symbols. For lossless decoding, we will show that the encoder only needs to send the minimum of position information to help modeling the assignment cost matrix. In addition, there are many ways to send this information, allowing new possibilities for implementing practical distributed coding. This technique also simplifies the modeling of probabilities and reduces the number of coding operations. Thus, we used it within the Stanford distributed video coding architecture and tested its practicality and efficiency. The video coding tests and results show that this idea can work, and its performance is similar to the existing distributed video coding techniques.

关键词： Assignment problem distributed video coding Side information Slepian-Wolf coding Sorting algorithm

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Low-complexity distributed multiple description coding for wireless video sensor networks

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IET WIRELESS SENSOR SYSTEMS 2013年第3期3卷 205-215页

作者： Liu, Wenhui Vijayanagar, Krishna R. Kim, Joohee IIT Dept Elect & Comp Engn South Dearborn St Chicago IL 60616 USA

Quality-of-service-guaranteed video communication in wireless video sensor networks (WVSNs) is extremely challenging because of the unique constraints of WVSN (e.g. limited resources of sensors and high error rates in wireless sensor networks) and the characteristics of video traffic (e.g. huge data rate and tight delay bounds). distributed video coding (DVC) has emerged as a new video coding paradigm for video applications with resource-limited encoders. However, current DVC architectures still have several technical limitations that prevent their widespread use in real-world applications. A low-complexity distributed multiple description coding method that combines the principles of multiple description coding and DVC has been proposed to further improve the error resilience of DVC, while maintaining low encoder complexity and good rate-distortion performance in WVSN. Simulation results show that the proposed method is robust against transmission errors, while maintaining low encoder complexity and low system latency for resource-limited applications in WVSNs.

关键词： quality of service rate distortion theory telecommunication traffic video coding video communication wireless sensor networks network coding low-complexity distributed multiple description coding method wireless video sensor network quality-of-service-guaranteed video communication WVSN video traffic characteristics tight delay bound DVC distributed video coding resource-limited encoder application error resilience rate-distortion performance

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distributed coding Scheme for Multi-view video through Efficient Side Information Generation

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JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY 2014年第5期9卷 1762-1773页

作者： Yoo, Jihwan Ko, Min Soo Kwon, Soon Chul Seo, Young-Ho Kim, Dong-Wook Yoo, Jisang Kwangwoon Univ Dept Elect Engn Seoul South Korea LG Elect Inc Seoul South Korea Kwangwoon Univ Dept Informat & Contents Seoul South Korea Kwangwoon Univ Coll Liberal Arts Seoul South Korea Kwangwoon Univ Dept Elect Mat Engn Seoul South Korea

In this paper, a distributed image coding scheme for multi-view video through an efficient generation of side information is proposed. A distributed video coding technique corrects the errors in the side information, which is generated with the original image, by using the channel coding technique at the decoder. Therefore, the more correct the generated side information is, the better the performance of distributed video coding. The proposed technique is to apply the distributed video coding schemes to the image coding for multi-view video. It generates side information by selectively and efficiently using both 3-dimensional warping based on the depth map with spatially adjacent frame's and motion-compensated temporal interpolation with temporally adjacent frames. In this scheme the difference between the adjacent frames, the sizes of the motion vectors for the adjacent blocks, and the edge information are used as the selection criteria. From the experiments, it was observed that the quality of the side information generated by the proposed technique was improved by the average peak signal-to-noise ratio of 0.97dB than the one by motion-compensated temporal interpolation or 3-dimensional warping. The result from analyzing the rate-distortion curves revealed that the proposed scheme could reduce the bit-rate by 8.01% on average at the same peak signal-to-noise ratio value, compared to previous work.

关键词： distributed video coding Multi-view video coding Side information Depth map 3D warping

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Graph Matching Based Side Information Generation for distributed Multi-view video coding

Graph Matching Based Side Information Generation for Distrib...

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IEEE International Conference on Communications (ICC 2009)

作者： Lv, Hui Xiong, Hongkai Song, Li He, Zhihai Chen, Tsuhan Shanghai Jiao Tong Univ Dept Elect Engn Shanghai 200240 Peoples R China Univ Missouri Dept Elect & Comp Engn Columbia MO 65211 USA Carnegie Mellon Univ Dept Elect & Comp Engn Pittsburgh PA 15213 USA

ISBN: (纸本)9781424434343

In this paper, we adopt constrained relaxation for distributed multi-view video coding (DMVC). The novel framework integrates the graph-based segmentation and matching to generate inter-view correlated side information without knowing the camera parameters. Moreover, graph-based representations of multi-view images are incorporated to form more distinctive feature constraints. The sparse data as a good hypothesis space aim for a best matching optimization of inter-view side information with compact syndromes, from inferred relaxed coset. The plausible filling-in from a priori feature constraints between neighboring views could reinforce a promising compensation to inter-view side information generation for joint multi-view decoding. In order to find distinctive feature matching with a more stable approximation, PCA-SIFT and TPS (thin plate spline) are adopted to reduce the dimension of SIFT descriptors and construct a more accurate inter-view motion model. The experimental results validate the high estimation precision and the rate-distortion improvements.

关键词： Multi-view video coding distributed video coding PCA-SIFT thin plate spline graph-based segmentation

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distributed coding OF ENDOSCOPIC video

DISTRIBUTED CODING OF ENDOSCOPIC VIDEO

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18th IEEE International Conference on Image Processing (ICIP)

作者： Deligiannis, Nikos Verbist, Frederik Barbarien, Joeri Slowack, Jurgen Van de Walle, Rik Schelkens, Peter Munteanu, Adrian Vrije Univ Brussel IBBT Dept Elect & Informat Brussels Belgium Univ Ghent ELIS Dept Multimedia Lab IBBT Ghent Belgium

ISBN: (纸本)9781457713033

Triggered by the challenging prerequisites of wireless capsule endoscopic video technology, this paper presents a novel distributed video coding (DVC) scheme, which employs an original hash-based side-information creation method at the decoder. In contrast to existing DVC schemes, the proposed codec generates high quality side-information at the decoder, even under the strenuous motion conditions encountered in endoscopic video. Performance evaluation using broad endoscopic video material shows that the proposed approach brings notable and consistent compression gains over various state-of-the-art video codecs at the additional benefit of vastly reduced encoding complexity.

关键词： video capsule endoscopy distributed video coding hash-driven overlapped block motion estimation

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USING distributed SOURCE coding AND DEPTH IMAGE BASED RENDERING TO IMPROVE INTERACTIVE MULTIVIEW video ACCESS

USING DISTRIBUTED SOURCE CODING AND DEPTH IMAGE BASED RENDER...

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18th IEEE International Conference on Image Processing (ICIP)

作者： Petrazzuoli, Giovanni Cagnazzo, Marco Dufaux, Frederic Pesquet-Popescu, Beatrice TELECOM ParisTech TSI Dept F-75634 Paris 13 France

ISBN: (纸本)9781457713033

Multiple-views video is commonly believed to be the next significant achievement in video communications, since it enables new exciting interactive services such as free viewpoint television and immersive teleconferencing. However the interactivity requirement (i.e. allowing the user to change the viewpoint during video streaming) involves a trade-off between storage and bandwidth costs. Several solutions have been proposed in the literature, using redundant predictive frames, Wyner-Ziv frames, or a combination of them. In this paper, we adopt distributed video coding for interactive multiview video plus depth (MVD), taking advantage of depth image based rendering (DIBR) and depth-aided inpainting to fill the occlusion areas. To the authors' best knowledge, very few works in interactive MVD consider the problem of continuity of the playback during the switching among streams. Therefore we survey the existing solutions, we propose a set of techniques for MVD coding and we compare them. As main results, we observe that DIBR can help in rate reduction (up to 13.36% for the texture video and up to 8.67% for the depth map, wrt the case where DIBR is not used), and we also note that the optimal strategy to combine DIBR and distributed video coding depends on the position of the switching time into the group of pictures. Choosing the best technique on a frame-to-frame basis can further reduce the rate from 1% to 6%.

关键词： distributed video coding interactive TV 3D-TV multiview video plus depth depth map depth image based rendering inpainting

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TEXTURE SIDE INFORMATION GENERATION FOR distributed coding OF video-PLUS-DEPTH

TEXTURE SIDE INFORMATION GENERATION FOR DISTRIBUTED CODING O...

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20th IEEE International Conference on Image Processing (ICIP)

作者： Salmistraro, Matteo Raket, Lars Lau Zamarin, Marco Ukhanova, Anna Forchhammer, Soren Tech Univ Denmark DTU Foton DK-2800 Lyngby Denmark Univ Copenhagen Dept Comp Sci DK-2100 Copenhagen Denmark

ISBN: (纸本)9781479923410

We consider distributed video coding in a monoview videoplus-depth scenario, aiming at coding textures jointly with their corresponding depth stream. distributed video coding (DVC) is a video coding paradigm in which the complexity is shifted from the encoder to the decoder. The Side Information (SI) generation is an important element of the decoder, since the SI is the estimation of the to-be-decoded frame. Depth maps enable the calculation of the distance of an object from the camera. The motion between depth frames and their corresponding texture frames (luminance and chrominance components) is strongly correlated, so the additional depth information may be used to generate more accurate SI for the texture stream, increasing the efficiency of the system. In this paper we propose various methods for accurate texture SI generation, comparing them with other state-of-the-art solutions. The proposed system achieves gains on the reference decoder up to 1.49 dB.

关键词： distributed video coding Depth Map Wyner-Ziv coding Optical Flow Multi-Hypothesis

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STEREO video coding USING distributed COMPRESSIVE SENSING WITH JOINT DICTIONARY

STEREO VIDEO CODING USING DISTRIBUTED COMPRESSIVE SENSING WI...

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19th IEEE International Conference on Image Processing (ICIP)

作者： Bai, Huihui Zhang, Mengmeng Wang, Anhong Zhao, Yao Beijing Jiaotong Univ Inst Informat Sci Beijing 100044 Peoples R China North China Univ Technol Beijing 100144 Peoples R China Taiyuan Univ Sci & Technol Taiyuan 030024 Peoples R China

ISBN: (纸本)9781467325332;9781467325349

For many practical applications, stereo-paired video is an important special case of multiview video coding (MVC). This paper presents a novel framework of stereo video coding based on distributed compressive sensing, which also can be easily extended to MVC. According to distributed video coding (DVC) at the encoder the video sequences from each view can be compressed independently without any communications between the cameras while at the decoder the inter-view correlation can be exploited for quality enhancement. Furthermore, due to compressive sensing (CS) principles, low complexity at the encoder side can result in low power consumption in the cameras, which may be promising in wireless camera sensor network. Here, the joint dictionary is applied in compressive sensing, which can make good use of inter-view and temporal correlation for better reconstruction quality of convex optimization. The experimental results validate the effectiveness of the proposed scheme with better performance than other compared schemes.

关键词： stereo video coding distributed video coding compressive sensing joint dictionary

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video compression with flexible playback order based on distributed source coding

Video compression with flexible playback order based on dist...

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Conferenceon Visual Communications and Image Processing 2006

作者： Cheung, NM Wang, HS Ortega, A Univ So Calif Dept Elect Engn Signal & Image Proc Inst Los Angeles CA 90089 USA

ISBN: (纸本)0819461172

Some emerging applications may require flexible playback features for time-based media, such as video, that cannot be directly supported by current compression standards, because for these decoding of frames can only be done in a predetermined order. An example would be a video application where both backward and forward frame-by-frame playback are to be supported. A standard codec could support this by decoding complete GOPs in the desired order, and then playing back one frame at a time. Thus, potentially significant added delay and memory are needed to support backward playback, which can be lowered if small GOP sizes are chosen, at the cost of reduced coding efficiency. Other example applications where flexible playback may be desirable include switching between different views in multiview video coding, and accessing individual spectral bands in hyperspectral imagery. In this work we address flexible playback by showing that it becomes feasible when a particular data unit (e.g., a video frame) can be decoded using information from either one of a number of other data units (e. in the video case the next frame or the previous frame). Note that this is different from structures such as bi-directionally predicted frames, which require both predictor frames to be available at the decoder. We cast this problem as one of source coding with uncertainty about decoder side-information and propose a solution based on distributed source coding. In addition, we propose macroblock-based mode switching algorithms in the context of distributed video coding to improve coding efficiency. Our results show that, using forward/backward playback as an example, our proposed solution can achieve good coding efficiency without incurring additional delay and memory overhead.

关键词： flexible playback distributed source coding distributed video coding macroblock-based mode switching

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