Adaptive depth ﬁltering for HEVC 3D video coding
2012 (English)In: 2012 Picture Coding Symposium, PCS 2012, Proceedings, IEEE conference proceedings, 2012, 49-52 p.Conference paper (Refereed)
Consumer interest in 3D television (3DTV) is growing steadily, but current available 3D displays still need additional eye-wear and suffer from the limitation of a single stereo view pair. So it can be assumed that auto-stereoscopic multiview displays are the next step in 3D-at-home entertainment, since these displays can utilize the Multiview Video plus Depth (MVD) format to synthesize numerous viewing angles from only a small set of given input views. This motivates efﬁcient MVD compression as an important keystone for commercial success of 3DTV. In this paper we concentrate on the compression of depth information in an MVD scenario. There have been several publications suggesting depth down- and upsampling to increase coding efﬁciency. We follow this path, using our recently introduced Edge Weighted Optimization Concept (EWOC) for depth upscaling. EWOC uses edge information from the video frame in the upscaling process and allows the use of sparse, non-uniformly distributed depth values. We exploit this fact to expand the depth down-/upsampling idea with an adaptive low-pass ﬁlter, reducing high energy parts in the original depth map prior to subsampling and compression. Objective results show the viability of our approach for depth map compression with up-to-date High-Efﬁciency Video Coding (HEVC). For the same Y-PSNR in synthesized views we achieve up to 18.5% bit rate decrease compared to full-scale depth and around 10% compared to competing depth down-/upsampling solutions. These results were conﬁrmed by a subjective quality assessment, showing a statistical signiﬁcant preference for 87.5% of the test cases.
Place, publisher, year, edition, pages
IEEE conference proceedings, 2012. 49-52 p.
3-D displays; 3-D television; 3D video coding; Auto stereoscopic; Bit rates; Coding efficiency; Consumer interests; Depth information; Depth Map; Depth value; Edge information; High energy; Multiview displays; Multiview video; Stereo view; Subjective quality assessments; Test case; Upsampling; Upscaling; Video frame; Viewing angle
IdentifiersURN: urn:nbn:se:miun:diva-16211DOI: 10.1109/PCS.2012.6213283ISI: 000306962400013ScopusID: 2-s2.0-84864026988Local ID: STCISBN: 978-1-4577-2048-2OAI: oai:DiVA.org:miun-16211DiVA: diva2:526703
29th Picture Coding Symposium, PCS 2012;Krakow;7 May 2012through9 May 2012;Code91163