Distributed video coding (DVC) is a coding paradigm that entails low complexity encoding by exploiting the source statistics at the decoder. To improve the DVC coding efficiency, this paper proposes a novel adaptive technique for mode decision to control and take advantage of skip mode and intra mode in DVC. The adaptive mode decision is not only based on quality of key frames but also the rate of Wyner-Ziv (WZ) frames. To improve noise distribution estimation for a more accurate mode decision, a residual motion compensation is proposed to estimate a current noise residue based on a previously decoded frame. The experimental results show that the proposed adaptive mode decision DVC significantly improves the rate distortion performance without increasing the encoding complexity. For a GOP size of 2 on the set of test sequences, the average bitrate saving of the proposed codec is 35.5% on WZ frames compared with the DISCOVER codec.
|Journal||A P S I P A Transactions on Signal and Information Processing|
|Publication status||Published - 2015|
|Event||Picture Coding Symposium (PCS 2013) - San Jose, CA, United States|
Duration: 8 Dec 2013 → 11 Dec 2013
|Conference||Picture Coding Symposium (PCS 2013)|
|City||San Jose, CA|
|Period||08/12/2013 → 11/12/2013|
Bibliographical noteCopyright © The Authors, 2015 This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
- Distributed video coding
- Adaptive mode decision
- Noise distribution
- Residual motion compensation