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IEEE International Conference on multimedia and Expo Workshops (ICMEW)

作者： Roodaki, Hoda Iravani, Zahra Hashemi, Mahmoud Reza Shirmohammadi, Shervin Gabbouj, Moncef Univ Tehran Coll Engn Sch Elect & Comp Engn Multimedia Proc Lab Tehran 14174 Iran Univ Ottawa Sch Elect Engn & Comp Sci Distributed & Collaborat Virtual Environm Res Lab Ottawa ON K1N 6N5 Canada Tampere Univ Technol Tampere Finland

ISBN: (纸本)9781479916047

A typical scenario for multi-view 3D consists of several 3D video sequences captured simultaneously from the same scene with the help of multiple cameras from different positions and through different angles. Due to the extremely high bandwidth of multi-view/3D video, rate control is one of the key factors influencing its quality. In this paper, we investigate the impacts of multi-view/3D video characteristics on the bit rate of a compressed video and we propose an analytical view-level rate model for multi-view video coding. Our rate model takes into account both previous theoretical results as well as new results specifically obtained for multi-view video and confirmed by comprehensive practical experiments. These new results reveal a close relationship between the rate of each view and consequently the perceived quality by users, available bandwidth and processing power. Simulation results indicate that our model can predict the rate of each view with relatively high precision and a low estimation error of 20% on average.

关键词： Rate control multi-view video coding inter-view disparity processing power

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Frame Compatible Format Fast Encoder with Stereo Matching

Frame Compatible Format Fast Encoder with Stereo Matching

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Yu, Wenxin Yu, Liang Wang, Weichen Xu, Jiu Southwest Univ Sci & Technol Sch Comp Sci & Technol Mianyang 621010 Sichuan Peoples R China KLab Inc Tokyo 1066122 Japan Waseda Univ Grad Sch Informat Prod & Syst Fukuoka 8080135 Japan

ISBN: (纸本)9781479983919

In this paper, a frame compatible format fast encoder with stereo matching is proposed. Through packing the two neighboring views after down-sampling into one frame, the frame compatible format coding allows stereo video to be encoded on the conventional video applications. The matching of content similarity is the key of the fast encoder of Frame Compatible Format (FCF) H.264. Experiments show that the stereo matching can achieve a better result than simply using a shift obtaining method. This paper gives a statistical analysis of the prediction correlation between the two packed views in FCF by using different method to prove that the system can obtain much better results with stereo matching method. A modified fast stereo matching algorithm which is suitable for FCF fast encoding is introduced. Finally, the process and simulated results of stereo matching combined frame compatible format fast encoder is shown. Through the experimental result, the proposed algorithm can obtain a better result than the previous work. It can achieve better video quality, less PSNR lost and the lower bit rate increment.

关键词： Frame Compatible Format Fast encoder Fast Stereo Matching multi-view video coding

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An Efficient Motion Estimation Scheme with Low Complexity in video coding 10

An Efficient Motion Estimation Scheme with Low Complexity in...

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10th IEEE Conference on Industrial Electronics and Applications

作者： Yoon, Hyo-sun Kim, Mi-Young Chonnam Natl Univ Dept Comp Sci Gwang Ju South Korea Jeonnam Prov Coll Dept Hlth & Med Damyang Jeollanamdo South Korea

ISBN: (纸本)9781479983896

To transmit and to store digital video sequences, compression is necessary. Motion Estimation (ME) Technique is used to redundant data in video sequences. ME which limits the performance of image quality, generated bitrates and encoding time requires huge complexity. To reduce the computational complexity, a Hierarchical motion estimation scheme in multiview video coding (MVC) is proposed. The proposed method exploits the characteristics of the distribution of motion vectors to terminate the motion estimation early and to place the search points in the search area. Experiment results show that the complexity reduction of the proposed method over FS and TZ can be up to 98.9% and 42 similar to 78% respectively while maintaining image quality and bitrates. This electronic document is a "live" template and already.

关键词： motion estimation motion vector multi-view video coding

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Chrominance Compensation for multi-view video coding

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IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS 2009年第2期E92D卷 353-356页

作者： Park, Min-Woo Park, Jong-Tae Park, Gwang-Hoon Suh, Doug-Young Kyung Hee Univ Coll Elect & Informat Media Lab Yongin 449701 Kyunggi South Korea

This letter introduces a cost-effective chrominance compensation scheme. The proposed method is applied to both 'INTER 16x16' and 'SKIP' modes in only anchor P-pictures. By testing using JVT common test condition, simulation results show that proposed method can obtain average BD-PSNR gains for U and V as 0.14 dB and 0.13 dB, respectively while maintaining almost the same BD-PSNR's for Y. For the range of low bit-rate, it is observed that average BD-PSNR gains for Y, U and V are 0. 14 dB, 0.49 dB and 0.53 dB, respectively. Necessary computational complexity is very marginal because the number of anchor P-pictures is very small in comparison with whole coded video sequences. However it can be found that the proposed method can significantly improve the coding efficiencies of color components.

关键词： multimedia system MPEG multi-view video coding 3D video

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Adaptive data-driven parallelization of multi-view video coding on multi-core processor

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Science in China(Series F) 2009年第2期52卷 195-205页

作者： PANG Yi HU WeiDong SUN LiFeng YANG ShiQiang Department of Computer Science and Technology Tsinghua University Beijing 100084 China

multi-view video coding （MVC） comprises rich 3D information and is widely used in new visual media, such as 3DTV and free viewpoint TV （FTV）. However, even with mainstream computer manufacturers migrating to multi-core processors, the huge computational requirement of MVC currently prohibits its wide use in consumer markets. In this paper, we demonstrate the design and implementation of the first parallel MVC system on Cell Broadband Engine^TM processor which is a state-of-the-art multi-core processor. We propose a task-dispatching algorithm which is adaptive data-driven on the frame level for MVC, and implement a parallel multi-view video decoder with modified H.264/AVC codec on real machine. This approach provides scalable speedup （up to 16 times on sixteen cores） through proper local store management, utilization of code locality and SIMD improvement. Decoding speed, speedup and utilization rate of cores are expressed in experimental results.

关键词： adaptive data-driven multi-view video coding Cell Broadband Engine^TM Processor parallelization

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Research on Key Technologies of Free Stereoscopic Display under multi-views and multi-view video coding

Research on Key Technologies of Free Stereoscopic Display un...

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4th International Conference on Computer Science and Education

作者： Zhang Wen Wu Juan Guilin Coll Aerosp Technol Dept Elect Engn Guilin 541004 Peoples R China Guilin Coll Aerosp Technol Dept Acad Affairs Guilin 541004 Peoples R China

ISBN: (纸本)9781424435197

Free stereoscopic display offers a new means for stereoscopic observation, with the greatest strongpoint of experiencing true stereoscopic image without any aided equipments. It is a complex and highly technical process to achieve free stereoscopic display, among which the key technologies are: the components of stereoscopic display hardware, the formation of a stereoscopic data, multi-view video coding, storage and eventual broadcast. Every detail is explained about the design of stereo video player based on Davinci (TM) DM6446. A novel method of MVC coding structure is proposed after the study of H.264 MVC and character of stereo video. The experiment's results indicate that, compared with the original structure, the classification performance is improved in the coding structure.

关键词： Free stereoscopic display multi-view video coding H.264 Disparity compensate

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Frame-layer Rate Control Algorithm for multi-view video coding 09

Frame-layer Rate Control Algorithm for Multi-view Video Codi...

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World Summit on Genetic and Evolutionary Computation (GEC 09)

作者： Yan, Tao Shen, Liquan An, Ping Wang, He Zhang, Zhaoyang Shanghai Univ Sch Commun & Informat Engn Key Lab Adv Displays & Syst Applicat Minist Educ Shanghai Peoples R China

ISBN: (纸本)9781605583266

Rate control has not been well studied for multi-view video coding (MVC). We propose a rate control algorithm for MVC based on the quadratic rate-distortion model. We remodel the quadratic rate-distortion model for multi-view videos based on the type of each frame. In the frame level, the quantization parameters are set according to the parameters of the various kinds of image model which is set up through the analysis of the coded information. The experimental results show that the proposed scheme can allocate the bits and control the rate efficiently.

关键词： multi-view video coding rate control bit-allocation rate-distortion model

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DEPTH BASED REGION OF INTEREST EXTRACTION FOR multi-view video coding

DEPTH BASED REGION OF INTEREST EXTRACTION FOR MULTI-VIEW VID...

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International Conference on Machine Learning and Cybernetics

作者： Zhang, Yun Yu, Mei Jiang, Gang-Yi Ningbo Univ Fac Informat Sci & Engn Ningbo 315211 Zhejiang Peoples R China

ISBN: (纸本)9781424447053

In this paper, a framework of region-of-interest (ROI) based multi-view video coding has been proposed to improve compression efficiency by properly segmenting the multi-view videos into different macroblock level ROI and encoding them separately. We define depth based ROI for multi-view video. Then, we propose a semantic low-complexity ROI extraction algorithm based on multi-view video plus depth. ROI quality can be improved by allocating more bits on ROI regions while fewer bits are allocated to non-ROI regions for bit rate saving. Experimental results on multi-view video coding show that 11.34% and 21.41% bit rate can be saved for Ballet and Breakdancers sequences while maintaining high objective quality of ROI regions and high subjective quality of the multi-view videos.

关键词： multi-view video coding Region of interest multi-view video plus depth Depth map

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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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A NEW RATE DISTORTION MODEL FOR multi-view/3D video coding

A NEW RATE DISTORTION MODEL FOR MULTI-VIEW/3D VIDEO CODING

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IEEE International Conference on multimedia and Expo Workshops

作者： Hoda Roodaki Zahra Iravani Mahmoud Reza Hashemi Shervin Shirmohammadi Moncef Gabbouj Multimedia Processing Laboratory School of Electrical and Computer Engineering College of Engineering University of Tehran Tampere University of Technology

ISBN: (纸本)9781479916030

关键词： Rate control multi-view video coding Inter-view disparity Processing power

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