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| Content Provider | ACM Digital Library |
|---|---|
| Author | Deligiannis, Nikos Walle, Rik van de Slowack, Jürgen Verbist, Frederik Munteanu, Adrian Schelkens, Peter |
| Copyright Year | 2014 |
| Abstract | Wyner-Ziv video coding constitutes an alluring paradigm for visual sensor networks, offering efficient video compression with low complexity encoding characteristics. This work presents a novel hash-driven Wyner-Ziv video coding architecture for visual sensors, implementing the principles of successively refined Wyner-Ziv coding. To this end, so-called side-information refinement levels are constructed for a number of grouped frequency bands of the discrete cosine transform. The proposed codec creates side-information by means of an original overlapped block motion estimation and pixel-based multihypothesis prediction technique, specifically built around the pursued refinement strategy. The quality of the side-information generated at every refinement level is successively improved, leading to gradually enhanced Wyner-Ziv coding performance. Additionally, this work explores several temporal prediction structures, including a new hierarchical unidirectional prediction structure, providing both temporal scalability and low delay coding. Experimental results include a thorough evaluation of our novel Wyner-Ziv codec, assessing the impact of the proposed successive refinement scheme and the supported temporal prediction structures for a wide range of hash configurations and group of pictures sizes. The results report significant compression gains with respect to benchmark systems in Wyner-Ziv video coding (e.g., up to 42.03% over DISCOVER) as well as versus alternative state-of-the-art schemes refining the side-information. |
| Starting Page | 1 |
| Ending Page | 34 |
| Page Count | 34 |
| File Format | |
| ISSN | 15504859 |
| e-ISSN | 15504867 |
| DOI | 10.1145/2530279 |
| Volume Number | 10 |
| Issue Number | 2 |
| Journal | ACM Transactions on Sensor Networks (TOSN) |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2014-01-31 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Wyner-Ziv coding Hash-driven distributed video coding Low-cost encoding Successive refinement Visual sensors |
| Content Type | Text |
| Resource Type | Article |
| Subject | Computer Networks and Communications |
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