The motion estimation and disparity estimation are used to remove the temporal and inter-view redundancies in multiview plus depthvideocoding, however, the variable block-size ME and DE make the computational comple...
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The motion estimation and disparity estimation are used to remove the temporal and inter-view redundancies in multiview plus depthvideocoding, however, the variable block-size ME and DE make the computational complexity increase dramatically. This drawback limits it to be applied in real-time applications. In this paper, based on the mode correlations between depthvideo and its corresponding texture video, motion prediction and coded block pattern, we propose a fast mode decision algorithm to reduce the computational complexity of multiview depth video coding. Experimental results show that the proposed algorithm can achieve 67.18 and 69.90 % encoding time saving for even and odd views, respectively, while maintaining a comparable rate-distortion performance. In addition, with the dramatic encoding time reduction, the proposed algorithm becomes more suitable for real-time applications.
Quality of virtual view image is one of the important issues in multiview depth video coding (MDVC). When people enjoy three dimensional (3D) applications, they may have an unpleasant perceptual experience if the virt...
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Quality of virtual view image is one of the important issues in multiview depth video coding (MDVC). When people enjoy three dimensional (3D) applications, they may have an unpleasant perceptual experience if the virtual view has low image quality. Thus, high virtual view image quality is mostly expected in the rate control optimization for MDVC with limited channel bandwidth and buffer resources. In this paper, a view synthesis distortion model is proposed first to indicate the importance of each frame in the depthvideo. Second, to achieve a balance between virtual view image quality and buffer constraint, the proposed view synthesis distortion model is incorporated in the bargain game theoretic model to handle the frame level bit allocation problem for Hierarchical B-picture (HBP) structure. Experimental results demonstrate that the proposed rate control algorithm achieves 0.18 dB BDPSNR gain in average compared to the benchmark. The average mismatch of the proposed algorithm is only 0.71%. (C) 2014 Elsevier B.V. All rights reserved.
With the development of three-dimensional (3-D) display technologies, 3-D video has attracted more and more interest. multiviewvideo plus depth (MVD) is one of the most popular representation formats of 3-D video. In...
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With the development of three-dimensional (3-D) display technologies, 3-D video has attracted more and more interest. multiviewvideo plus depth (MVD) is one of the most popular representation formats of 3-D video. In MVD coding system, multiviewdepthvideo needs to be coded and transmitted in addition to the texture video. This paper presents a novel fast mode decision (FMD) method for odd views in multiview depth video coding. First, the inter-view and inter-component coding correlations are analyzed to provide efficient reference information. Then, with a view to the characteristics of different types of frames, different early termination strategies are proposed. For the nonanchor frame, the early termination criterion is based on the rate-distortion cost information of the even views and the coded block pattern information. For the anchor frame, the criterion is set stricter to maintain the coding accuracy. Experimental results show that the proposed method can reduce 78.07% coding time on average, without significant loss of video quality.
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