Fault-Tolerance Based Block-Level Bit Allocation and Adaptive RDO for Depth Video Coding
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© 2017 IEEE. Depth videos affect the visual quality of virtual view greatly, while conventional encoders are not adapted to encode depth videos. To solve this problem, we propose, in the paper, a fault-tolerance based joint block-level bit allocation scheme for depth video coding. The scheme classifies depth blocks into two classes by the fault-tolerance, and constructs virtual view perceptual quality based rate-distortion (R-D) model for each class. Based on the model, a joint block-level bit allocation scheme is proposed to obtain the optimized quantization parameter (QP) to encode each class of blocks. Further, an adaptive RDO algorithm is designed to determine λMODE, in order to achieve better visual quality of virtual views. Experimental results demonstrate that, compared with 3D-HEVC, the proposed method improves the visual quality of virtual views, especially at preserving details and boundaries of objects.
author list (cited authors)
Wang, S., Yu, L. i., Xiang, S., & Xiong, Z.