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Fast Mode Decision Using Global Disparity Vector for multiview video coding

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 2009年第12期E92A卷 3407-3411页

作者： Han, Dong-Hoon Lee, Yung-Ki Lee, Yung-Lyul Sejong Univ Dept Comp Engn DMS Lab Seoul South Korea

Since multiview video coding (MVC) based on H.264/AVC uses a prediction scheme exploiting inter-view correlation among multiview video, MVC encoder compresses multiple views more efficiently than simulcast H.264/AVC encoder. However, in case that the number of views to be encoded increases in MVC, the total encoding time will be greatly increased. To reduce computational complexity in MVC, a fast mode decision using both Macroblock-based region segmentation information and global disparity vector among views is proposed to reduce the encoding time. The proposed method achieves on the average 1.5 similar to 2.9 reduction of the total encoding time with the PSNR (Peak Signal-to-Noise Ratio) degradation of about 0.05 dB.

关键词： multi-view video coding H.264/AVC fast mode decision disparity vector

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Bitrate Efficient 3DoF+360 video view Synthesis for Immersive VR video Streaming 9

Bitrate Efficient 3DoF+360 Video View Synthesis for Immersiv...

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9th International Conference on Information and Communication Technology Convergence (ICTC)

作者： Jeong, JongBeom Jang, Dongmin Son, Jang-Woo Ryu, Eun-Seok Gachon Univ Dept Comp Engn Seongnam South Korea

ISBN: (纸本)9781538650417

Recently, as the demand for Virtual Reality(VR) is increasing, it is not hard to experience immersive contents with VR However, a tremendous amount of calculation and bandwidth are required when processing 360 videos. Moreover, to enjoy stereoscopic 360 contents, additional information such as the depth of the video must be provided. Therefore, in this paper, it proposes the efficient method of streaming high quality 360 videos. To reduce the bandwidth when streaming and synthesizing the 3DoF+ 360 video which supports limited movements of the user, the proper down-sampling ratio and quantization parameter are offered with the graph between bitrate and Peak Signal-to-Noise Ratio(PSNR). To encode and decode the 360 video, High-Efficiency video coding(HEVC) is used. And view synthesizer produces the video of intermediate view to provide the user with an immersive experience.

关键词： VR 3DoF+ HEVC view synthesis VSRS RVS FTV WS-PSNR multi-view video coding

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Histogram Color Correction For multi-view video Cording 11

Histogram Color Correction For Multi-View Video Cording

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International SoC Design Conference (ISOCC)]

作者： Park, Chan-Su Kim, Hi-Seok Cha, Hyeong-Woo Cheongju Univ Dept Elect Engn Cheongju South Korea

ISBN: (纸本)9781479951277

In this paper, a histogram clustering threshold based on color correction method is proposed for multi-view video coding. To fmd the maximum matching regions for the reference-view frame and the target view-frame, SAD is performed. By using an iterative histogram clustering threshold, a minimum histogram difference between the reference-view frame and the target-view frame is computed to correct the target-view frame. Experimental results have shown that the proposed color correction method outperforms the other histogram matching method on the aspect of the PSNR and computation time.

关键词： formatting multi-view video coding color correction histogram matching

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Integrated multi-view compensation for real sense video interfaces

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Symposium on Human Interface and the Management of Information held at HCI International 2007

作者： Park, Jongbin Jeon, Byeungwoo Sungkyunkwan Univ Sch Informat & Commun Engn Seoul South Korea

ISBN: (纸本)9783540733539

multi-view video is a new multimedia service which provides immersion and realism using the multiple view channels. However, as the number of cameras increases, the enormous data volume generated by them inevitably calls for better video compression and processing algorithms. However, the multiple images taken at any certain time instants always have inconsistency among the views in their intensity, color, sharpness, and so on. It not only degrades the compression efficiency greatly but also causes subjective quality loss such as dizziness and unnaturalness in random view access. To solve this problem, in this paper, we propose a new multi-view compensation method which uses the Kalman filter. It estimates the illumination discrepancy parameters autonomously both in encoder and decoder. Therefore, our method needs not transmit any additional data for illumination discrepancy information.

关键词： multi-view video coding illumination compensation inter-view prediction

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COMPRESSION OF 2-D WIDE multi-view video SEQUENCES USING view INTERPOLATION

COMPRESSION OF 2-D WIDE MULTI-VIEW VIDEO SEQUENCES USING VIE...

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15th IEEE International Conference on Image Processing (ICIP 2008)

作者： Chung, Taeyoung Song, Kwanwoong Kim, Chang-Su Korea Univ Sch Elect Engn Seoul South Korea

ISBN: (纸本)9781424417650

In this work, we propose an efficient coding algorithm for multi-view video sequences, captured with a 2-D camera array. We develop an efficient prediction structure, which can exploit inter-view redundancies as well as temporal redundancies in 2-D multi-view video sequences. Moreover, we propose a view interpolation technique based on the bilateral criterion and the skip mode to improve the coding performance. Simulation results show that the proposed algorithm provides better PSNR performance than the conventional multi-view video coding algorithm.

关键词： multi-view video coding hierarchical B prediction view interpolation disparity estimation

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A Framework of 3D video coding using view Synthesis Prediction

A Framework of 3D Video Coding using View Synthesis Predicti...

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29th Picture coding Symposium (PCS)

作者： Lee, Cheon Ho, Yo-Sung GIST Kwangju 500712 South Korea

ISBN: (纸本)9781457720482

The advanced 3D video system employs the multi-view video plus depth (MVD) format to support free-viewpoint navigation and comfortable 3D video. Therefore, the prediction structure of the multi-view video coding (MVC) can be used for 3D video coding. The view synthesis prediction method is designed to exploit inter-view correlation using the virtual view generation;hence it is suitable for 3D video coding. In this paper, we propose an efficient framework for 3D video coding using view synthesis prediction to compress multi-view color and depth data simultaneously. We designed the coding procedure of MVD data with four types of view synthesis methods according to the view position. The experimental results showed that the proposed framework improved the coding performance at most 0.9 dB for the multi-view color videos.

关键词： 3D video coding view syntehsis prediction framework for 3D video coding multi-view video coding

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multi-view video codec based on KTA techniques

Multi-view video codec based on KTA techniques

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Conference on Stereoscopic Displays and Applications XXII

作者： Seo, Jungdong Kim, Donghyun Ryu, Seungchul Sohn, Kwanghoon Yonsei Univ Sch EE Digital Image Media Lab Seoul 120749 South Korea

ISBN: (纸本)9780819484000

multi-view video coding (MVC) is a video coding standard developed by MPEG and VCEG for multi-view video. It showed average PSNR gain of 1.5dB compared with view-independent coding by H.264/AVC. However, because resolutions of multi-view video are getting higher for more realistic 3D effect, high performance video codec is needed. MVC adopted hierarchical B-picture structure and inter-view prediction as core techniques. The hierarchical B-picture structure removes the temporal redundancy, and the inter-view prediction reduces the inter-view redundancy by compensated prediction from the reconstructed neighboring views. Nevertheless, MVC has inherent limitation in coding efficiency, because it is based on H.264/AVC. To overcome the limit, an enhanced video codec for multi-view video based on Key Technology Area (KTA) is proposed. KTA is a high efficiency video codec by video coding Expert Group (VCEG), and it was carried out for coding efficiency beyond H.264/AVC. The KTA software showed better coding gain than H.264/AVC by using additional coding techniques. The techniques and the inter-view prediction are implemented into the proposed codec, which showed high coding gain compared with the view-independent coding result by KTA. The results presents that the inter-view prediction can achieve higher efficiency in a multi-view video codec based on a high performance video codec such as HEVC.

关键词： multi-view video coding Key Technology Area (KTA) inter-view prediction H.264/AVC

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AN IMPROVED BLOCK MATCHING AND PREDICTION ALGORITHM FOR multi-view video WITH DISTRIBUTED video CODEC

AN IMPROVED BLOCK MATCHING AND PREDICTION ALGORITHM FOR MULT...

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IEEE International Conference on multimedia and Expo (ICME)

作者： Chen, Ching-Hua Lee, Shih-Chieh Chen, Jiann-Jone Natl Taiwan Univ Sci & Technol EE Dept Taipei Taiwan

ISBN: (纸本)9781612843490

With the advance of multi-view video codec (MVC) technology, the multimedia platform can display videos of different views. The distributed video coder (DVC) that adopts the Wynzer-Ziv (WZ) codec can shift encoding complexity to decoder under the MVC framework, denoted as multi-view DVC (MDVC), for possible low-complexity encoder applications. For side information (SI) generation, the intra-and inter-view video correlations among images in MDVC were exploited to improve the SI confidence to yield better reconstructed WZ images. We proposed a new block matching and prediction (BMP) algorithm based on Scale Invariant Feature Transform, abbreviated as SIFT-BMP, to yield more accurate SI to improve the reconstructed video quality. Simulations verified that the proposed SIFT-BMP yielded more accurate SI and higher PSNR of reconstructed images, as compared to previous methods. The PSNR improvements are 1.6 similar to 2.5 dB and higher, as compared to MCTI and H. 264/AVC, for medium to high complexity videos.

关键词： multi-view video coding block motion estimation Wyner-Ziv codec side information

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multiview video coding USING DEPTH BASED 3D WARPING

MULTIVIEW VIDEO CODING USING DEPTH BASED 3D WARPING

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International Conference on multimedia and Expo

作者： Iyer, Kiran Nanjunda Maiti, Kausik Navathe, Bilva Kannan, Hariprasad Sharma, Anshul Samsung India Software Operat Pvt Ltd Bangalore Karnataka India

ISBN: (纸本)9781424474936

For future applications like 3DTV and free view point TV, the video data format is likely to comprise of multiple views plus pre-estimated geometric information such as a depth-map corresponding to each view. It has been well studied that the depth-maps are useful both from compression and rendering perspective. In this paper, we propose two methods which use the concept of depth based 3D warping for efficient multiview video compression. First, we present a method to synthesize virtual view based on 3D warping to enhance inter-view prediction. We analyze similar previous works on view synthesis based inter-view prediction and present comparative results. Next, we propose a novel method that uses 3D warping to improve conventional disparity compensated prediction. Experimental results demonstrate improved coding efficiency with our proposed methods when compared with MVC.

关键词： 3D warping Depth-map multi-view video coding view synthesis prediction Disparity compensated prediction

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Low Complexity Disparity Estimation for Immersive 3D video Transmission

Low Complexity Disparity Estimation for Immersive 3D Video T...

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IEEE International Conference on Communications (ICC)

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

ISBN: (纸本)9781467357531

Bandwidth-limited channels demand the transmission of the per-pixel depth maps with the texture data to provide immersive 3D video services that allow arbitrary 3D viewpoint reconstruction. This auxiliary depth data offers geometric information, which together with the multi-view and epipolar geometries, can be exploited during 3D video coding to calculate geometric positions for the search areas of disparity estimation. These positions represent a more accurate estimate match to compensate the current macro-block from than those provided by the median adopted by the H.264/MVC standard. The result is smaller search areas that reduce the encoder's computational requirement. In this work, we exploit this fact together with the largest depth variation within the macro-block to encode, to calculate and adaptively adjust these areas along the epipolar lines. The proposed solution achieves a speedup gain of up-to 32 times over the original disparity estimation, with negligible influence on the rate-distortion performance of 3D video coding. This highly reduces the computational cost of the H.264/MVC encoder and eases its need to be implemented on highly expensive systems that are otherwise necessary to meets the stringent latency requirement of broadcast transmissions. Moreover, it provides similar coding efficiencies required for such scenarios.

关键词： 3DV coding fast and adaptive disparity estimation geometric predictors multi-view video coding

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