- Title
- Efficient coding of depth map by exploiting temporal correlation
- Creator
- Shahriyar, Shampa; Murshed, Manzur; Ali, Mortuza; Paul, Manoranjan
- Date
- 2014
- Type
- Text; Conference proceedings
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/76482
- Identifier
- vital:7556
- Identifier
-
https://doi.org/10.1109/DICTA.2014.7008105
- Abstract
- With the growing demands for 3D and multi-view video content, efficient depth data coding becomes a vital issue in image and video coding area. In this paper, we propose a simple depth coding scheme using multiple prediction modes exploiting temporal correlation of depth map. Current depth coding techniques mostly depend on intra-coding mode that cannot get the advantage of temporal redundancy in the depth maps and higher spatial redundancy in inter-predicted depth residuals. Depth maps are characterized by smooth regions with sharp edges that play an important role in the view synthesis process. As depth maps are more sensitive to coding errors, use of transformation or approximation of edges by explicit edge modelling has impact on view synthesis quality. Moreover, lossy compression of depth map brings additional geometrical distortion to synthetic view. In this paper, we have demonstrated that encoding inter-coded depth block residuals with quantization at pixel domain is more efficient than the intra-coding techniques relying on explicit edge preservation. On standard 3D video sequences, the proposed depth coding has achieved superior image quality of synthesized views against the new 3D-HEVC standard for depth map bit-rate 0.25 bpp or higher.
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Relation
- 2014 International Conference on Digital Image Computing : Techniques and Applications (DICTA); Wollongong, Australia; 25th-27th November 2014; http://purl.org/au-research/grants/arc/DP130103670
- Rights
- Copyright © 2014 by the Institute of Electrical and Electronic Engineers, Inc.
- Rights
- This metadata is freely available under a CCO license
- Subject
- Codes (symbols); Coding errors; Redundancy; Video recording; Video signal processing; 3-d and multi-view videos; Edge preservations; Geometrical distortion; Image and video coding; Lossy compressions; Spatial redundancy; Temporal correlations; Temporal redundancy; Image coding
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