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Transformation of Video Signal Processing Techniques from 2D to 3D: A Survey

机译：视频信号处理技术从2D到3D的转变：一项调查

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This paper presents an advanced depth intra-coding approach for 3D video coding based on the High Efficiency Video Coding (HEVC) standard and the multi-view video plus depth (MVD) representation. This paper is motivated by the fact that depth signals have specific characteristics that differ from those of natural signals, i.e., camera-view video. Our approach replaces conventional intra-picture coding for the depth component, targeting a consistent and efficient support of 3D video applications that utilize depth maps or polygon meshes or both, with a high depth coding efficiency in terms of minimal artifacts in rendered views and meshes with a minimal number of triangles for a given bit rate. For this purpose, we introduce intra-picture prediction modes based on geometric primitives along with a residual coding method in the spatial domain, substituting conventional intra-prediction modes and transform coding, respectively. The results show that our solution achieves the same quality of rendered or synthesized views with about the same bit rate as MVD coding with the 3D video extension of HEVC (3D-HEVC) for high-quality depth maps and with about 8% less overall bit rate as with 3D-HEVC without related depth tools. At the same time, the combination of 3D video with 3D computer graphics content is substantially simplified, as the geometry-based depth intra signals can be represented as a surface mesh with about 85% less triangles, generated directly in the decoding process as an alternative decoder output.
机译：本文提出了一种基于高效视频编码（HEVC）标准和多视图视频加深度（MVD）表示的3D视频编码的高级深度帧内编码方法。本文的动机是深度信号具有不同于自然信号的特定特征，即摄像机视角的视频。我们的方法取代了用于深度分量的常规图片内编码，目标是对利用深度图或多边形网格或两者兼有的3D视频应用程序提供一致且有效的支持，并且在渲染视图和网格物体方面具有最小的伪影，从而具有很高的深度编码效率。给定比特率的最小三角形数目。为此，我们在空间域中引入基于几何图元的图片内预测模式以及残差编码方法，分别替代常规的帧内预测模式和变换编码。结果表明，对于高质量深度图，我们的解决方案以与MVD编码相同的比特率获得与MVD编码相同的渲染或合成视图质量，并且具有用于高质量深度图的HEVC（3D-HEVC）的3D视频扩展。没有相关深度工具的情况下，3D-HEVC的速率相同。同时，由于可将基于几何的深度帧内信号表示为表面网格，且三角形数减少了约85％，因此可以大大简化3D视频与3D计算机图形内容的组合，作为替代方案解码器输出。

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