3D-HEVC is the state-of-the-art standard to compress three-dimensional videos. One of the 3D-HEVC novel tools is the DIS tool, which is used to efficiently compress smooth and homogeneous areas of depth maps by using four different prediction modes. The decision of which DIS mode will be used is done through the SVDC similarity criterion in the DIS original definition. This article proposes the substitution of the complex SVDC criterion for simpler and more hardware friendly criteria as SATD, SSE, and SAD. These alternative criteria were evaluated in terms of encoding efficiency and hardware impacts in comparison with the SVDC. Dedicated DIS hardware were designed using each one of each criterion and these designs were described in VHDL and synthesized for TSMC 40 nm. The best results were found with SAD criteria, with losses of only 0.2% in coding efficiency and with expressive gains of more than 50 times in power and more than 35 times in area, when compared with SVDC. The reached results showed that the use of a simpler similarity criterion is an important alternative to be used in DIS tool, mainly if an efficient hardware design is required.

3D-HEVC 是压缩 3D 视频的最新标准。3D-HEVC 新工具之一是 DIS 工具，该工具用于通过使用四种不同的预测模式有效地压缩深度图的平滑和均匀区域。通过 DIS 原始定义中的 SVDC 相似性标准来决定使用哪种 DIS 模式。本文建议将复杂的 SVDC 标准替换为更简单且对硬件更友好的标准，如 SATD、SSE 和 SAD。与 SVDC 相比，这些替代标准在编码效率和硬件影响方面进行了评估。使用每个标准中的每一个来设计专用的 DIS 硬件，这些设计在 VHDL 中进行了描述，并针对 TSMC 40 nm 进行了综合。使用 SAD 标准发现了最好的结果，损失仅为 0。与 SVDC 相比，编码效率提高 2%，功率提高 50 倍以上，面积提高 35 倍以上。达到的结果表明，使用更简单的相似性标准是 DIS 工具中使用的重要替代方案，主要是在需要有效的硬件设计时。