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IEEE International Symposium on Circuits and Systems

作者： Yi-Wen Chen Jian-Liang Lin Yu-Wen Huang Shawmin Lei MediaTek Inc. No. 1 Dusing Rd. 1 Hsinchu Science Park Hsinchu Taiwan

ISBN: (纸本)9781479983926

As the state-of-the-art video coding standard, High Efficiency video coding (HEVC) has been finalized in January 2013. To support the coding of multiple views and associated depth data, the development of the HEVC extension for 3d video coding is also about to be finalized. New coding unit (CU) level coding tools are added to the HEVC design to improve the compression capabilities for both video views and depth data. In this paper, we introduce a new coding mode termed as "Single depth Intra coding Mode" to efficiently code the smooth area within a depth map. The concept of single depth mode is to simply reconstruct a coding block with a single depth value based on block merging scheme under the HEVC quad-tree based block partitioning. The proposed single depth mode has been adopted into the working draft and 3d-HEVC test model 12 (HTM-12.0). The experimental results evaluated under the common test conditions (CTC) for 3d-HEVC show that the proposed technique achieves up to 5% bit-rate saving for depth coding and on average 0.3% bit-rate saving regarding the synthesis results over the texture and depth bit-rate with decoding time reduced by 4%.

关键词： HEVC 3d video coding single depth intra mode intra prediction 3d-HEVC

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A Fast CU decision Algorithm for MV-HEVC

A Fast CU Decision Algorithm for MV-HEVC

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2015 IEEE International Conference on Smart City/SocialCom/SustainCom (SmartCity)

作者： Wang, Peicheng Liu, Xingang Shao, Binfei Univ Elect Sci & Technol China Sch Elect Engn Chengdu 610054 Peoples R China

ISBN: (纸本)9781509018932

MV-HEVC is a 3d extension of the High Efficiency video coding (HEVC) standard, which is developed to improve the coding efficiency of multi-view video. However, this improved efficiency leads to greater computational complexity. Recently, how to reduce the encoding time for multi-view coding is becoming a hot issue in real-time applications. In this paper, a fast coding unit (CU) decision algorithm is proposed by utilizing spatiotemporal and inter-view information, including the maximum depth level of related CUs and motion vectors. Firstly, the maximum depth level of current CU is predicted by using spatiotemporal and inter-view CUs. Then, it will be adjusted by checking whether the current CU has the same motion feature with nearby spatial CUs. Experimental results show that our proposed algorithm can achieve up to 67.16 % time reduction with a little degradation in encoding efficiency.

关键词： 3d video coding Early CU decision MV-HEVC Spatiotemporal and inter-view correlation

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Synthesized Views distortion Model Based Rate Control in 3d-HEVC 16th

Synthesized Views Distortion Model Based Rate Control in 3D-...

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16th Pacific-Rim Conference on Multimedia (PCM)

作者： Tan, Songchao Ma, Siwei Wang, Shanshe Gao, Wen Dalian Univ Technol Sch Comp Sci & Technol Dalian 116024 Peoples R China Peking Univ Inst Digital Media Beijing 100871 Peoples R China

ISBN: (纸本)9783319240787;9783319240770

In this paper, we propose a synthesized views distortion model based rate control algorithm for the high efficiency video coding (HEVC) based 3d video compression standard. The major contributions of the paper include the following two aspects. Firstly, we investigate the distortion dependency between the synthesized views and the coded views including texture video and depth maps. Then we propose a synthesized views distortion model for 3d-HEVC, and based on the distortion model an efficient joint bit allocation scheme is proposed. Experimental results show that the proposed rate control algorithm achieves better performance on both the coded texture views and synthesized views. The maximum overall (including all coded texture views and all synthesized views) performance improvement can be up to 14.4% and the average Bd-rate gain is 6.9%. Moreover, it can accurately control the bitrate to satisfy the total bitrate constraint.

关键词： Rate control Bit allocation 3d video coding

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OVERVIEW OF THE MULTIVIEW HIGH EFFICIENCY video coding (MV-HEVC) STANdARd

OVERVIEW OF THE MULTIVIEW HIGH EFFICIENCY VIDEO CODING (MV-H...

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IEEE International Conference on Image Processing (ICIP)

作者： Hannuksela, Miska M. Yan, Ye Huang, Xuehui Li, Houqiang Nokia Technol Mountain View CA 94043 USA Univ Sci & Technol China Hefei Peoples R China

ISBN: (纸本)9781479983391

This paper reviews the multiview extension (MV-HEVC) of the High Efficiency video coding (HEVC) standard. MV-HEVC is capable of multiview video coding with or without accompanying depth views. The key design concepts and design elements of MV-HEVC are described in the paper. Furthermore, the features and characteristics of MV-HEVC compared to other standardized video codec extensions for three-dimensional (3d) video coding are reviewed.

关键词： HEVC MV-HEVC 3d video coding

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Quad-tree based Inter-view Motion Prediction

Quad-tree based Inter-view Motion Prediction

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IEEE Visual Communications and Image Processing (VCIP) Conference

作者： Ma, Ji Zhang, Na Fan, Xiaopeng Xiong, Ruiqin Zhao, debin Harbin Inst Technol Dept Comp Sci & Technol Harbin Peoples R China Peking Univ Inst Digital Media Beijing Peoples R China

ISBN: (纸本)9781467373142

As a 3d video extension of Audio video coding Standard (AVS), 3d-AVS is being developed to improve the coding efficiency of multi-view video. Since multi-view video is composed of projections of the same scenery from different viewpoints at the same time instant, it contains a large amount of inter-view redundancies. To exploit the inter-view correlation, this paper presents a method to derive the motion parameters for a coding unit (CU) in the dependent view from the already coded inter-view picture. The algorithm is based on quad-tree partitioning, each CU could be recursively split into four sub-CUs of the same size and whether each sub-CU is further split is determined by comparing the derived motion parameters. Experimental results show that the proposed method provides 8.7% Bd-rate saving for both video 1 and video 2 in low delay configuration and the Bd-rate saving is up to 14.5% and 13.7% on video 1 and video 2 for Balloons. This method has been proposed and adopted into the 3d-AVS standard.

关键词： 3d video coding quad-tree inter-view motion prediction disparity vector 3d-AVS

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Post-processing of 3d video Extension of H.264/AVC for a Quality Enhancement of Synthesized View Sequences

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ETRI JOURNAL 2014年第2期36卷 242-252页

作者： Bang, Gun Hur, Namho Lee, Seong-Whan ETRI Broadcasting & Telecommun Media Res Lab Taejon South Korea Korea Univ Dept Comp Sci & Engn Seoul South Korea Korea Univ Dept Brain & Cognit Engn Seoul South Korea

Since July of 2012, the 3d video extension of H.264/AVC has been under development to support the multi-view video plus depth format. In 3d video applications such as multi-view and free-view point applications, synthesized views are generated using coded texture video and coded depth video. Such synthesized views can be distorted by quantization noise and inaccuracy of 3d wrapping positions, thus it is important to improve their quality where possible. To achieve this, the relationship among the depth video, texture video, and synthesized view is investigated herein. Based on this investigation, an edge noise suppression filtering process to preserve the edges of the depth video and a method based on a total variation approach to maximum a posteriori probability estimates for reducing the quantization noise of the coded texture video. The experiment results show that the proposed methods improve the peak signal-to-noise ratio and visual quality of a synthesized view compared to a synthesized view without post processing methods.

关键词： 3d video coding view synthesis post-processing denoising MAP total variation

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Initialization, Limitation, and Predictive coding of the depth and Texture Quadtree in 3d-HEVC

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IEEE TRANSACTIONS ON CIRCUITS ANd SYSTEMS FOR video TECHNOLOGY 2014年第9期24卷 1554-1565页

作者： Mora, Elie Gabriel Jung, Joel Cagnazzo, Marco Pesquet-Popescu, Beatrice Orange Labs F-92794 Issy Les Moulineaux France Telecom ParisTech F-75634 Paris France

The 3d video extension of High Efficiency video coding (3d-HEVC) exploits texture-depth redundancies in 3d videos using intercomponent coding tools. It also inherits the same quadtree coding structure as HEVC for both components. The current software implementation of 3d-HEVC includes encoder shortcuts that speed up the quadtree construction process, but those are always accompanied by coding losses. Furthermore, since the texture and its associated depth represent the same scene, at the same time instant and view point, their quadtrees are closely linked. In this paper, an intercomponent tool is proposed in which this link is exploited to save both runtime and bits through a joint coding of the quadtrees. If depth is coded before the texture, the texture quadtree is initialized from the coded depth quadtree. Otherwise, the depth quadtree is limited to the coded texture quadtree. A 31% encoder runtime saving, a -0.3% gain for coded and synthesized views and a -1.8% gain for coded views are reported for the second method.

关键词： 3d video coding depth quadtree limitation intercomponent prediction predictive coding texture quadtree initialization

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Fast encoder decision for texture coding in 3d-HEVC

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SIGNAL PROCESSING-IMAGE COMMUNICATION 2014年第9期29卷 951-961页

作者： Zhang, Na Zhao, debin Chen, Yi-Wen Lin, Jian-Liang Gao, Wen Harbin Inst Technol Dept Comp Sci & Technol Harbin 150001 Peoples R China MediaTek Hsinchu 30078 Taiwan

As a 3d extension of the High Efficiency video coding (HEVC) standard, 3d-HEVC is developed to improve the coding efficiency of multi-view video. However, the improvement of the coding efficiency is obtained at the expense of a computational complexity increase. How to relieve the computational burden of the encoder is becoming a critical problem in applications. In this paper, a fast encoder decision algorithm to encode the dependent texture views is proposed, where two strategies to accelerate encoder decision by exploiting inter-view correlations are utilized. The first one is an early merge mode decision algorithm, and the second one is an early CU splitting termination algorithm. Experimental results show that the proposed algorithm can achieve 47.1% encoding time saving with overall 0.1% Bd-rate reduction compared to HTM (3d-HEVC test model) version 7 under the common test condition (CTC). Both of the two strategies have been adopted into the 3d-HEVC reference software and enabled as a default encoding process under CTC. (C) 2014 Elsevier B.V. All rights reserved.

关键词： 3d video coding Early merge mode decision Early CU splitting termination Inter-view correlation 3d-HEVC

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depth Map coding using Residual Segmentation for 3d video System

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3d RESEARCH 2013年第2期4卷 5-5页

作者： Lee, Cheon Ho, Yo-Sung GIST 123 Cheomdan Gwagiro Gwangju 500712 South Korea

Advanced 3d video systems employ multi-view video-plus-depth data to support the free-viewpoint navigation and comfortable 3d viewing;thus efficient depth map coding becomes an important issue. Unlike the color image, the depth map has a property that depth values of the inner part of an object are monotonic, but those of object boundaries change abruptly. Therefore, residual data generated by prediction errors around object boundaries consume many bits in depth map coding. Representing them with segment data can be better than the use of the conventional transformation around the boundary regions. In this paper, we propose an efficient depth map coding method using a residual segmentation instead of using transformation. The proposed residual segmentation divides residual data into two regions with a segment map and two mean values. If the encoder selects the proposed method in terms of rates, two quantized mean values and an index of the segment map are transmitted. Simulation results show significant gains of up to 10 dB compared to the state-ofthe-art coders, such as JPEG2000 and H.264/AVC.

关键词： 3d video coding depth map coding residual segmentation

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VIEW SYNTHESIS QUALITY MAPPING FOR dEPTH-BASEd SUPER RESOLUTION ON MIXEd RESOLUTION 3d video

VIEW SYNTHESIS QUALITY MAPPING FOR DEPTH-BASED SUPER RESOLUT...

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3dTV-Conference on True Vision - Capture, Transmission and display of 3d video (3dTV-CON)

作者： Joachimiak, Michal Hannuksela, Miska M. Gabbouj, Moncef Tampere Univ Technol FIN-33101 Tampere Finland Nokia Res Ctr Tampere Finland

ISBN: (纸本)9781479947584

Advances in 3d video technology expand the availability of hardware for 3d video generation and display. Some 3d capture and coding arrangements take advantage of a mixed resolution setup. In difference to typical 3d multiview video the mixed resolution scenario assumes that a subset of views is coded at reduced spatial resolution. After decoding, the low resolution views have to upsampled in order to preserve homogeneous resolution of the rendered 3d video. We improve the depth-based super resolution technique that uses a view synthesis process as an essential step. We propose to improve the view synthesis step by per-pixel selection of the projection method. The method is tested on the data coded using a mixed resolution 3d video codec implemented on top of the 3dV-ATM reference software and evaluated under the JCT-3V common test conditions. Simulation results show that our method can improve the depth-based super resolution upsampling by 0.64% of dBR on average for total coded bitrate and 0.55% of dBR on average for synthesized views. Aggregated coding gain with respect to full resolution scenario is improved by 7.71% of dBR on average for total coded bitrate and 11.1% dBR for synthesized views.

关键词： 3d video coding upsampling super resolution view synthesis view projection image warping mixed resolution depth-based super resolution

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