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http://dx.doi.org/10.5909/JBE.2013.18.2.261

Application of Adaptive Loop Filter for NRT-Based Stereoscopic Video Coding  

Lee, Byung-Tak (Korea Aerospace University)
Lee, BongHo (ETRI)
Choi, Haechul (Hanbat National University)
Kim, Jin-Soo (Hanbat National University)
Yun, Kugjin (ETRI)
Cheong, Won-Sik (ETRI)
Kim, Jae-Gon (Korea Aerospace University)
Publication Information
Journal of Broadcast Engineering / v.18, no.2, 2013 , pp. 261-270 More about this Journal
Abstract
A stereoscopic 3D video service is able to provide a 3D video service while keeping backward compatibility with the existing 2D video service. In the terrestrial digital television (DTV) system, a stereoscopic video codec is required to have high coding efficiency in order to provide a 3D video service in the same channel capacity. A hybrid codec consisting of MPEG-2 for base video and H.264/AVC or HEVC for 3D auxiliary video is considered. Furthermore, Non-Real-Time (NRT) delivery of stereoscopic video is also considered as a service scenario for 3DTV services to overcome the limited bandwidth. In this paper, we propose a stereoscopic video coding scheme using adaptive loop filter (ALF) which had been considered in HEVC as a pre-/post-filter for enhancing coding efficiency in NRT-based 3DTV services. In order to apply ALF as a post-filter to the reconstructed additional view coded by H.264/AVC, we devise a method in which ALF is adaptively applied based on a structure determined by using macroblock (MB) coding information such as MB mode type and reference index instead of coding unit (CU) structure on which ALF is applied in the HEVC. Experimental results shows that the proposed stereoscopic video coding scheme applying ALF obtains up to 24.9% gain of bit saving.
Keywords
3D; Stereoscopic Video; Adaptive Loop Filter (ALF); NRT;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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