Predictive depth map coding for efficient virtual view synthesis

Lucas, Luı́s; Rodrigues, Nuno M. M.; Pagliari, Carla L.; Silva, Eduardo A. B. da; Farla, Sergio M. M. de

doi:10.1109/icip.2013.6738424

Cited by 4 publications

(8 citation statements)

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“…An initial version of the algorithm for the Predictive Depth Coding (PDC) approach was presented in [20] using intra coding. Such initial proposal only consisted on a flexible block partitioning scheme combined with an intra predictive framework, similar to the one used by HEVC standard, and constant residue modelling.…”

Section: Overview Of Predictive Depth Codingmentioning

confidence: 99%

“…Experiments, using the algorithm in [20] for depth map intra coding and the VSRS-3.5 software [11] for view synthesis, showed significant gains in terms of synthesis objective quality (PSNR), when compared to the use of the Platelet algorithm [16], specifically developed for depth map coding. Furthermore, comparisons with the state-of-the-art standards for natural image and video coding, as the AVC and HEVC encoders, showed a clear advantage of this preliminary algorithm.…”

Section: Overview Of Predictive Depth Codingmentioning

confidence: 99%

“…These advances allow the 3D-HEVC algorithm to achieve state-of-the-art RD performance for depth map coding, being more efficient than alternative algorithms presented in literature, including the previous PDC-based algorithm in [20]. In this context, new coding techniques and improvements to the PDC algorithm were investigated in this work in order to develop a viable alternative algorithm for intra depth map coding.…”

Section: Overview Of Predictive Depth Codingmentioning

confidence: 99%

“…In [20], a rough solution was used to alleviate this problem by dividing the tree ( Figure 3) into two sub-trees: one above block size 16 × 16 and another below. The 64 × 64 block could then be encoded using the upper sub-tree, where each block could be either partitioned down to 16 × 16 block size, or it could be encoded as sixteen individual 16 ×16 sub-blocks, partitioned according to the second sub-tree, from block size 16 × 16 down to 1 × 1.…”

Section: A Flexible Block Partitioningmentioning

confidence: 99%

“…The developed algorithm, referred to as Predictive Depth Coding (PDC), outperforms the most recent version of 3D-HEVC reference software [14] for intra depth map coding, when the assessment metric is the objective quality of the views synthesised using original textures and coded depth maps. This work is built over a previous version of the algorithm presented in [20]. The experimental results show that the novel coding tools and the improvements proposed in this paper resulted in a state-of-the-art RD performance for intra depth map coding.…”

Section: Introductionmentioning

confidence: 96%

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Intra Predictive Depth Map Coding Using Flexible Block Partitioning

Lucas

Wegner

Rodrigues

et al. 2015

IEEE Trans. on Image Process.

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A complete encoding solution for efficient intra-based depth map compression is proposed in this paper. The algorithm, denominated predictive depth coding (PDC), was specifically developed to efficiently represent the characteristics of depth maps, mostly composed by smooth areas delimited by sharp edges. At its core, PDC involves a directional intra prediction framework and a straightforward residue coding method, combined with an optimized flexible block partitioning scheme. In order to improve the algorithm in the presence of depth edges that cannot be efficiently predicted by the directional modes, a constrained depth modeling mode, based on explicit edge representation, was developed. For residue coding, a simple and low complexity approach was investigated, using constant and linear residue modeling, depending on the prediction mode. The performance of the proposed intra depth map coding approach was evaluated based on the quality of the synthesized views using the encoded depth maps and original texture views. The experimental tests based on all intra configuration demonstrated the superior rate-distortion performance of PDC, with average bitrate savings of 6%, when compared with the current state-of-the-art intra depth map coding solution present in the 3D extension of a high-efficiency video coding (3D-HEVC) standard. By using view synthesis optimization in both PDC and 3D-HEVC encoders, the average bitrate savings increase to 14.3%. This suggests that the proposed method, without using transform-based residue coding, is an efficient alternative to the current 3D-HEVC algorithm for intra depth map coding.

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Section: Overview Of Predictive Depth Codingmentioning

confidence: 99%

Section: Overview Of Predictive Depth Codingmentioning

confidence: 99%

Section: Overview Of Predictive Depth Codingmentioning

confidence: 99%

Section: A Flexible Block Partitioningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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