Scalable hologram video coding for adaptive transmitting service

Abstract

This paper discusses processing techniques for an adaptive digital holographic video service in various reconstruction environments, and proposes two new scalable coding schemes. The proposed schemes are constructed according to the hologram generation or acquisition schemes: hologram-based resolution-scalable coding (HRS) and light source-based signal-to-noise ratio scalable coding (LSS). HRS is applied for holograms that are already acquired or generated, while LSS is applied to the light sources before generating digital holograms. In the LSS scheme, the light source information is lossless coded because it is too important to lose, while the HRS scheme adopts a lossy coding method. In an experiment, we provide eight stages of an HRS scheme whose data compression ratios range from 1:1 to 100:1 for each layered data. For LSS, four layers and 16 layers of scalable coding schemes are provided. We experimentally show that the proposed techniques make it possible to service a digital hologram video adaptively to the various displays with different resolutions, computation capabilities of the receiver side, or bandwidths of the network.

Wireless Holographic Image Communications Relying on Unequal Error Protected Bitplanes

“…In [26], the Wavelet-Bandelets transform was employed for hologram compression. The widely known scalable video coding method of [27] was employed in [28] for compressing holographic video.…”

High-Performance Computer-Generated Hologram by Optimized Implementation of Parallel GPGPUs

“…In the case of calculating CGHs on the RX, the object point information, rather than a hologram itself, is transmitted. The service issue requires additional explanation and discussion, which is beyond the scope of this paper [12,13].…”

“…There are various types of systems for providing video service using digital holographic technology based on the CGH [13]. Among such systems, a method for the generation and display of natural scene-based holograms is presented in Fig.…”

Progressive hologram transmission using a view-dependent scalable compression scheme

“…Scalable coding has mainly be considered for images and videos [26][27][28], but some preliminary work for scalable hologram compression exist. For example, in [29,30] the hologram is represented as a light-field by a spatial cutting into small apertures. The obtained sub-holograms are then encoded using a scalable video codec and transmitted with respect to the viewer's location.…”