FEC-PSD: a FEC-aware video packet drop scheme

While delivering real-time video streams across a resource constrained network, loss of frame may be unavoidable. Under such circumstances, it is desirable to design smart video packet drop policies that take into account the ability of the end terminals to recover totally or partially the corrupted data using the forward error correction and error concealment feature. To address this issue, we introduce the concept of “cell drop tolerance” at the switch node. This concept is supported by a new video slice drop mechanism named FEC-PSD, that adaptively and selectively adjusts cell drop level to switch buffer occupancy, video cell payload type and error correction/concealment ability of the destination. The aim of this proposal is twofold. First, minimizing loss for critical video data, and second, reducing the bad throughput crossing the network. This algorithm is evaluated using MPEG-2 video traces