Kim Yongrok, Shin Won, Lee Jaewoo, Oh Kwan-Jung, Ko Hyunsuk
Opt Express. 2023 Nov 6;31(23):38854-38877. doi: 10.1364/OE.502254.
In recent decades, holographic technology has made significant progress with the development of novel hologram generation methods and three-dimensional rendering devices. Nevertheless, the substantial size of holographic data presents a significant challenge to its practical applications and thus necessitates the implementation of an efficient coding solution. In this study, we evaluate the efficiency of various coding tools within the state-of-the-art video coding standard, Versatile Video Coding, for encoding video of computer-generated phase-only hologram. Specifically, we examine the coding performance of transform/in-loop filter/screen-content coding tools. Through extensive encoding experiments and various statistical analyses, we investigated the limitations of existing standard codecs that do not account for the unique signal characteristics of phase-only holograms (POHs). The effects of coding artifacts on the visual quality of numerical reconstructions rendered from compressed POHs are also analyzed in detail. These comprehensive performance evaluations will provide valuable insights for developing efficient coding strategies for POH videos.
近几十年来，随着新型全息图生成方法和三维渲染设备的发展，全息技术取得了重大进展。然而，全息数据的巨大规模对其实际应用提出了重大挑战，因此需要实施高效的编码解决方案。在本研究中，我们评估了最新视频编码标准通用视频编码（Versatile Video Coding）中各种编码工具对计算机生成的纯相位全息图视频进行编码的效率。具体而言，我们研究了变换/环路滤波器/屏幕内容编码工具的编码性能。通过广泛的编码实验和各种统计分析，我们研究了现有标准编解码器的局限性，这些编解码器没有考虑纯相位全息图（POH）的独特信号特征。我们还详细分析了编码伪像对压缩POH数值重建视觉质量的影响。这些全面的性能评估将为开发POH视频的高效编码策略提供有价值的见解。
