TY  - GEN
N2  - In free viewpoint applications, the images are captured by an array of cameras that acquire a scene of interest from different perspectives. Any intermediate viewpoint not included in the camera array can be virtually synthesized by the decoder, at a quality that depends on the distance between the virtual view and the camera views available at decoder. Hence, it is beneficial for any user to receive camera views that are close to each other for synthesis. This is however not always feasible in bandwidth-limited overlay networks, where every node may ask for different camera views. In this work, we propose an optimized delivery strategy for free viewpoint streaming over overlay networks. We introduce the concept of layered quality-of-experience (QoE), which describes the level of interactivity offered to clients. Based on these levels of QoE, camera views are organized into layered subsets. These subsets are then delivered to clients through a prioritized network coding streaming scheme, which accommodates for the network and clients heterogeneity and effectively exploit the resources of the overlay network. Simulation results show that, in a scenario with limited bandwidth or channel reliability, the proposed method outperforms baseline network coding approaches, where the different levels of QoE are not taken into account in the delivery strategy optimization.
UR  - https://doi.org/10.1109/MMSP.2013.6659330
ID  - discovery1533088
EP  - 451
T3  - International Workshop on Multimedia Signal Processing (MMSP)
Y1  - 2013/11/11/
TI  - Interactive free viewpoint video streaming using prioritized network coding
AV  - public
PB  - IEEE
A1  - Toni, L
A1  - Thomos, N
A1  - Frossard, P
KW  - Cameras
KW  - 
Bandwidth
KW  - 
Network coding
KW  - 
Peer-to-peer computing
KW  - 
Decoding
KW  - 
Navigation
KW  - 
PSNR
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
SP  - 446
ER  -