Abstract
A reliable video communication system is proposed based on data partitioning feature of H.264/AVC, used to create a layered stream, and LT codes for erasure protection. The proposed scheme termed rate adaptive selective segment assignment (RASSA) is an adaptive low-complexity solution to varying channel conditions. The comparison of the results of the proposed scheme is also provided for slice-partitioned H.264/AVC data. Simulation results show competitiveness of the proposed scheme compared to optimized unequal and equal error protection solutions. The simulation results also demonstrate that a high visual quality video transmission can be maintained despite the adverse effect of varying channel conditions and the number of decoding failures can be reduced.
Highlights
Reliable real-time wireless video communication is gaining increased importance as novel richer multimedia applications are being deployed
We assume that the video has been pre-encoded at a fixed rate using Data partitioning (DP) into fixed length segments Instantaneous decoder refresh (IDR), DP A, DP B, and DP C
The IDR frame is put in the first Network Abstraction Layer (NAL) unit and it is not partitioned
Summary
Reliable real-time wireless video communication is gaining increased importance as novel richer multimedia applications are being deployed. When transmitting H.264/AVC video over a wireless channel, due to significant fluctuations of channel characteristics, the video is encoded at a fixed source rate and the redundancy (i.e., LT coded symbols) is added to avoid error effects. To DPs, the slices can be aggregated into different priority classes, with the higher-priority classes containing slices that have higher contribution to the reconstruction Such prioritization can make the sliced video data amenable to UEP and rate adaptation. The contributions of this study are (1) analysis of optimized EEP and UEP schemes for transmission of DP and sliced H.264/AVC video and their robustness in channel mismatch scenarios and (2) a rateadaptive optimized solution for bandwidth-limited wireless channels and limited resource devices.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
