Robust transmission of multimedia data over power-lines

In this paper, we jointly consider the source and channel coding problem with transmission over power line channels. We propose frame based multiple description (MD) video coding with an efficient reconstruction algorithm. Further, transmission deploys wide-band impulse modulation with bit interleaved convolutional channel coding. The MD video coder uses a redundant filterbank to generate multiple descriptions of the original video stream, and allows for exact signal reconstruction even in the presence of packet losses. In the presence of packet losses, we adopt a "restoring stage" before the synthesis filterbank whose purpose is to recover the lost coefficients. This solution has limited computational complexity and does not introduce excessive delay in interactive applications. We compare the robustness of the proposed solution with that of another MD solution based on polyphase spatial subsampling assuming wideband impulsive transmission over a power-line link with rate of 1.6 Mbps.