Rateless Codes with Progressive Recovery for Layered Multimedia Delivery
This addresses efficient multimedia streaming for users by improving error protection in layered delivery, though it appears incremental as it builds on existing unequal error protection methods.
The paper tackles the problem of layered multimedia delivery by proposing Progressive Rateless codes (PRC) that assign unequal redundancy to layers based on importance, enabling progressive recovery. Results show that PRC provides better recovery performance with lower overhead compared to related approaches.
This paper proposes a novel approach, based on unequal error protection, to enhance rateless codes with progressive recovery for layered multimedia delivery. With a parallel encoding structure, the proposed Progressive Rateless codes (PRC) assign unequal redundancy to each layer in accordance with their importance. Each output symbol contains information from all layers, and thus the stream layers can be recovered progressively at the expected received ratios of output symbols. Furthermore, the dependency between layers is naturally considered. The performance of the PRC is evaluated and compared with some related UEP approaches. Results show that our PRC approach provides better recovery performance with lower overhead both theoretically and numerically.