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Progressive hologram transmission using a view-dependent scalable compression scheme
Annals of Telecommunications ( IF 1.8 ) Pub Date : 2020-01-08 , DOI: 10.1007/s12243-019-00741-7
Anas El Rhammad , Patrick Gioia , Antonin Gilles , Marco Cagnazzo

Over the last few years, holography has been emerging as an alternative to stereoscopic imaging since it provides users with the most realistic and comfortable three-dimensional (3D) experience. However, high-quality holograms enabling a free-viewpoint visualization contain tremendous amount of data. Therefore, a user willing to access to a remote hologram repository would face high downloading time, even with high speed networks. To reduce transmission time, a joint viewpoint-quality scalable compression scheme is proposed. At the encoder side, the hologram is first decomposed into a sparse set of diffracted light rays using Matching Pursuit over a Gabor atoms dictionary. Then, the atoms corresponding to a given user’s viewpoint are selected to form a sub-hologram. Finally, the pruned atoms are sorted and encoded according to their importance for the reconstructed view. The proposed approach allows a progressive decoding of the sub-hologram from the first received atom. Streaming simulations for a moving user reveal that our approach outperforms conventional scalable codecs such as scalable H.265 and enables a practical streaming with a better quality of experience.

中文翻译:

使用依赖于视图的可伸缩压缩方案进行渐进式全息图传输

在过去的几年中,全息照相已成为立体成像的替代方法,因为它为用户提供了最真实,最舒适的三维(3D)体验。但是,可以实现自由视点可视化的高质量全息图包含大量数据。因此,即使使用高速网络,愿意访问远程全息图存储库的用户也将面临较高的下载时间。为了减少传输时间,提出了一种联合视点质量的可伸缩压缩方案。在编码器端,首先使用Gabor原子字典上的Matching Pursuit将全息图分解为稀疏的一组衍射光线。然后,选择与给定用户的视点相对应的原子以形成亚全息图。最后,修剪后的原子将根据其对重建视图的重要性进行分类和编码。所提出的方法允许从第一接收到的原子逐步解码亚全息图。针对移动用户的流模拟显示,我们的方法优于传统的可扩展编解码器,例如可扩展H.265,并可以提供具有更好体验质量的实用流。
更新日期:2020-01-08
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