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检索条件"主题词=multi-view video coding"

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Frame Compatible Format Fast Encoder with Stereo Matching

Frame Compatible Format Fast Encoder with Stereo Matching

引用

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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ILLUMINATION COMPENSATION VIA LOW RANK MATRIX COMPLETION FOR multiview video coding

ILLUMINATION COMPENSATION VIA LOW RANK MATRIX COMPLETION FOR...

引用

20th IEEE International Conference on Image Processing (ICIP)

作者： Zhang, Xiaopeng Xiong, Hongkai Shanghai Jiao Tong Univ Dept Elect Engn Shanghai 200240 Peoples R China

ISBN: (纸本)9781479923410

A multi-view video system would capture the same scene from different viewpoints, and suffer from significant illumination variations due to inaccurate camera calibration and varying light conditions. It deteriorates the inter-view correlations and the quality of synthesized views at decoder side. By converting the problem of illumination compensation to noise removing, this paper proposes a low-rank matrix completion algorithm to reduce the effect of illumination variation. Diverged from the existing work which chooses a central view as reference and keeps views consistent, it is dedicated to compensating all the views to match the low-rank structure of views. The discrepancies among views are regarded as mixed noise, and constructed as an incomplete matrix with low-rank. It is solved by a stable matrix completion and obtains a mapping function for color correction. It is robust to outliers since only plausible corresponding points are involved with completion. Experimental results show that the proposed algorithm can increase coding efficiency by up to 0.7 dB for luminance component and up to 2.1 dB for chrominance components.

关键词： Illumination compensation multi-view video coding matrix completion low-rank structure

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引用

IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM)

作者： Xu, Yanling Yao, Qiuguo Tongji Univ Coll Software Engn Shanghai 200092 Peoples R China

ISBN: (纸本)9781457702518

An efficient error concealment algorithm for reconstructing the loss frame in multi-view video sequences at the decoder is presented. The proposed method has a capacity of adopting the appropriate error concealment mode to recover the loss frame according to its reference frames similarity level. There are three modes in the method. For a high similarity level, the mode using temporal related frame copy (FC) to recover the lost frame is employed. When the similarity level is low, the spatially related frame is copied. Adapting to the medium similarity condition, both the similar MBs in temporal frames and the matching MBs in spatial frames are used to reconstruct the loss frame. And block matching principle is employed for filling empty blocks. Experimental results have shown that the proposed multi-view video error concealment method can effectively reconstruct the lost frames and has more attractive performance than previous algorithms.

关键词： multi-view video coding error concealment frame loss

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Rate control algorithm based on frame complexity estimation for MVC

Rate control algorithm based on frame complexity estimation ...

引用

Conference on Visual Communications and Image Processing (VCIP)

作者： Yan, Tao An, Ping Shen, Liquan Zhang, Zhaoyang Shanghai Univ Sch Commun & Informat Engn Shanghai 200072 Peoples R China Ningbo Univ Technol Coll Elect & Informat Ningbo 315016 Zhejiang Peoples R China Shanghai Univ Key Lab Adv Displays & Syst Applicat Shanghai 200072 Peoples R China

ISBN: (纸本)9780819482341

Rate control has not been well studied for multi-view video coding (MVC). In this paper, we propose an efficient rate control algorithm for MVC by improving the quadratic rate-distortion (R-D) model, which reasonably allocate bit-rate among views based on correlation analysis. The proposed algorithm consists of four levels for rate bits control more accurately, of which the frame layer allocates bits according to frame complexity and temporal activity. Extensive experiments show that the proposed algorithm can efficiently implement bit allocation and rate control according to coding parameters.

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

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Lowering the complexity of multi-view encoding through dynamic segmentation and registration of video object

Lowering the complexity of multi-view encoding through dynam...

引用

IEEE International Conference on Image Processing (ICIP 2006)

作者： Wei, Xiaohui Chu, Mei Yi Ahmad, Ishfaq Liang, Yongfang Univ Texas Dept Comp Sci & Engn Arlington TX 76019 USA

ISBN: (纸本)9781424404810

Exploitation of redundancies for superior coding efficiency is one of the major research issues in multi-view video coding (MVC). However, this incurs extra computation, counteracting the benefit gained from coding efficiency. This paper exploits inter-view correlations among video objects and background to lower the prediction complexity while achieving high coding efficiency in MVC. We propose an effective object-based scheme that utilizes video object information obtained from the coded base view. This information assists to predict disparity vectors and motion vectors in enhancement views (EVs) by employing object registration and warping. This leads to high compression and low-complexity coding scheme for EVs. The proposed scheme provides higher coding efficiency when compared to the segmentation-free scheme, while achieving lower computational complexity.

关键词： base view segmentation low computational complexity multi-view video coding object warping

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HEVC-based view Level Rate-distortion Model for multiview video 25

HEVC-based View Level Rate-distortion Model for Multiview Vi...

引用

25th Iranian Conference on Electrical Engineering (ICEE)

作者： Tajali, Behrad Roodaki, Hoda KN Toosi Univ Technol Fac Comp Engn Tehran Iran

ISBN: (纸本)9781509059638

The multiview extension of HEVC (MV-HEVC) with an ever increasing number of coding parameters allows much better coding performance compared to the previous multiview video coding standards. Usually, controlling the various coding parameters in a video coding standard to obey the rate constraints in various applications is a major challenge. Rate Control Algorithms (RCA) is used in video coding standards to control the coding parameters to satisfy different rate constraints. Although RCA is not part of a video coding standard but the specific features or aspects of the video coding standard can improve its efficiency considerably. In this paper, we propose a method to investigate the effect of a new feature of MV-HEVC, namely Advanced Motion Vector Prediction (AMVP), to improve the efficiency of the corresponding rate control algorithm. Rate control algorithms usually utilize a rate-distortion (RD) model as a basic tool to describe the relationship between the rate and the quality of the encoded video. We will show that considering the aforementioned feature of MV-HEVC video coding standard as a view-level RD model parameter can improve the effectiveness of the RD model. Evaluation results indicate that using this new feature of MV-HEVC in view-level RD model, we can predict the rate of each view with relatively high precision and a low estimation error of 11% on average.

关键词： MV-HEVC multi-view video coding rate-distortion model inter-view motion prediction

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OVERview OF FTV (FREE-viewPOINT TELEVISION)

OVERVIEW OF FTV (FREE-VIEWPOINT TELEVISION)

引用

IEEE International Conference on multimedia and Expo

作者： Tanimoto, Masayuki Nagoya Univ Grad Sch Engn Chikusa Ku Nagoya Aichi 4648603 Japan

ISBN: (纸本)9781424442904

We have developed a new type of television named FTV (Free-viewpoint TV). FTV is an innovative visual media that enables us to view a 3D scene by freely changing our viewpoints. We constructed the world's first real-time FTV system including the complete chain from capturing to display. We have also developed new type of ray capture and display technologies such as a 360-degree mirror-scan ray capturing system and a 360 degree ray-reproducing display. MPEG has been conducting the standardization activities of FTV. The first phase of FTV was multi-view video coding and the second phase is 3D video.

关键词： FTV Free-viewpoint TV ray-space multi-view video coding 3D video

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FRAMEWORKS FOR FTV coding

FRAMEWORKS FOR FTV CODING

引用

Picture coding Symposium 2009

作者： Tanimoto, Masayuki Wildeboer, Menno Nagoya Univ Grad Sch Engn Chikusa Ku Nagoya Aichi 4648603 Japan

ISBN: (纸本)9781424445936

We have developed a new type of television named FTV (Free viewpoint TV). FTV is an innovative media that enables us to view a 3D scene by freely changing Our viewpoints. FTV will be widely used since it is an ultimate 3DTV, a natural interface between human and environment, and an innovative tool to create new types of content and art. FTV has been contributing to the standardization of MVC (multi-view video coding) and 3DV (3D video) at MPEG. MVC is the first phase of FTV and 3DV is the second phase of FTV. An FTV system can be constructed in various ways, but typically includes multiple viewpoint video capture, image correction, depth estimation, coding/decoding and view interpolation. coding is related to view generation in FTV. In this paper, 4 frameworks for FTV coding are discussed and an FTV data format as a combination of FTV data units is proposed.

关键词： FTV 3DTV multi-view video coding depth estimation view synthesis 3D video

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IMPROVED DEPTH MAPS coding EFFICIENCY OF 3D videoS

IMPROVED DEPTH MAPS CODING EFFICIENCY OF 3D VIDEOS

引用

20th European Signal Processing Conference (EUSIPCO)

作者： Micallef, Brian W. Debono, Carl J. Farrugia, Reuben A. Univ Malta Dept Commun & Comp Engn Msida Malta

ISBN: (纸本)9781467310680

Immersive 3D video services demand the transmission of the viewpoints' depth map together with the texture multi-view video to allow arbitrary reconstruction of intermediate viewpoints required for free-view navigation and 3D depth perception. The multi-view video coding (MVC) standard is generally used to encode these auxiliary depth maps and since their estimation process is highly computational intensive, the coding time increases. This paper proposes a technique that exploits the multi-view geometry together with the depth map itself to calculate more accurate initial compensation vectors for the Macro-blocks' estimation. Starting from a more accurate position allows for a smaller search area, reducing the computations required during depth map MVC. Furthermore, the SKIP mode is extended to predict also the disparity vectors from the neighborhood encoded vectors, to omit some of them from transmission. Results demonstrate that these modifications provide an average computational reduction of up-to 87% with a bitrate saving of about 8.3% while encoding an inter-view predicted viewpoint from a depth map multi-view video.

关键词： Depth multi-view video coding multi-view video coding multi-view video plus depth efficient SKIP mode

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Key Techniques of High Efficiency video coding Standard and Its Extension 9

Key Techniques of High Efficiency Video Coding Standard and ...

引用

9th IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Wang, Zhangxin Zeng, Huanqiang Chen, Jing Cai, Canhui Huaqiao Univ Sch Informat Sci & Engn Xiamen Peoples R China

ISBN: (纸本)9781479943159

High Efficiency video coding (HEVC) is the newest video coding standard, which is developed by the Joint Collaborative Team on video coding (JCT-VC) consisting of ITUT video coding Experts Group (VCEG) and ISO/IEC Moving Picture Experts Group (MPEG). To improve the coding efficiency, HEVC adopts many new key techniques, such as coding tree unit, prediction unit, transform unit, multi-angle intra prediction, variable PU motion estimation, sample adaptive offset, and so on. Compared with its predecessor-H.264/AVC, HEVC is able to save about 50% bit rate while maintaining almost the same perceptual video quality. This paper aims to illustrate the key techniques of the HEVC standard and preview its extension in the near future.

关键词： video coding standard high efficiency video coding key techniques scalable video coding multi-view video coding

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