Layered LDGM codes for scalable video streaming over packet erasure channels

This paper introduces layered low-density generator matrix (Layered-LDGM) codes for scalable video streaming data. The layered-LDGM codes maintain the arbitrary relationship of each layer from the encoder side to the decoder side. This resulting structure supports partial decoding. Furthermore, the proposed codes create forward error correcting (FEC) packets that considers the relationship between the scalable components. Thus, the layered-LDGM codes enable lost packet data to be recovered effectively. Simulation results show that the proposed codes offer better error resiliency, without sacrificing scalability, than the existing method which creates FEC packets for each scalable component independently.