MultiPass Renderer in MPEG Test Model for Immersive Video MPEG is developing an immersive video coding standard aims to deliver 6DoF (degrees of freedom) visual experience enabling motion parallax and omnidirectional viewing capabilities. A reference software has been made available to implement the immersive standard. To make it robust for various immersive content and deliver sharper synthesis with suppressed artifacts, a multipass addon tool has been implemented for rendering at the decoder side. The tool runs view synthesis multiple times with different selection of views or patches of views in each pass based on the distance to the desired viewing position and orientation and merges the intermediate synthesized views to output a coherent and complete desired view. We share the multipass rendering results operating on whole views or on atlases (i.e. collection of patches from views) and compare them to the traditional singlepass synthesis results. We report significant subjective and objective improvements (1.7  4.2 dB gain in PSNR) for the multipass technique in the whole views case while having its synthesis results being atlasdependent in the immersive coding case.

Enhancements to MPEG4 MVC for Depth compression Depth map is expected to be an essential component of upcoming 3D video formats. In a multiview scenario, along with color (texture), amount of depth information will also increase linearly with the number of views. Therefore various techniques are being explored in the research community to efficiently compress the depth data. In this paper, we propose novel methods of depth compression based on MPEG4 Multiview Video Coding standard (MVC) without any substantial increase in computational complexity. Our aim is to improve depth coding gain with minimal modification to the standard. We present experimental results which indicate a considerable coding gain when compared with MVC.