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Fast depth map coding based on virtual view quality.pdf
Signal Processing: Image Communication 47 (2016) 183–192
Contents lists available at ScienceDirect
Signal Processing: Image Communication
journal homepage: /locate/image
Fast depth map coding based on virtual view quality
Chao Yang a,b, Ping An a,b,n, Liquan Shen a,b,n, Ran Ma a,b, Nina Feng a,b
a Key Laboratory of Advanced Displays and System Application, Ministry of Education, Shanghai, China b School of Communication and Information Engineering, Shanghai University, Shanghai, China
article info
Article history: Received 21 January 2016 Received in revised form 24 May 2016 Accepted 25 May 2016 Available online 3 June 2016
Keywords: Depth map Virtual view distortion Rate distortion optimization Quadtree structure 3D-HEVC
abstract
Multi-view video plus depth (MVD) format is a three-dimensional (3D) video representation. The depth map in MVD provides the scene distance information and is used to synthesize the virtual view with texture image through Depth Image Based Rendering (DIBR) technique. In this paper, we ?rst present a virtual view distortion estimation (VVDE) scheme to estimate the synthesized virtual view distortion induced by depth map compression. Then based on the synthesized virtual view distortion, we propose region based Quantization Parameter (QP) adjustment scheme to improve the perceived virtual view quality, fast VVDE scheme in depth map coding Rate Distortion Optimization (RDO) to improve the coding ef?ciency and fast Coding Unit (CU) partition scheme to reduce the depth map coding complexity. Experimental results demonstrate that the proposed algorithm can achieve 0.50 dB gain with 47.37% coding time reduction.
2016 Elsevier B.V. All rights reserved.
1. Introduction
THREE-DIMENSIONAL (3D) video has drawn a lot of attention since 3D movies won great success in the market. Multi-view video plus depth (MVD) 3D video format enables functionalities like 3D television [1] and free viewpoint video [2]. MVD consists of multiple views of colorful textur
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