Networking

Precoded EWF Codes for Unequal Error Protection of Scalable Video

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Executive Summary

Rateless codes are Forward Error Correcting (FEC) codes of linear encoding-decoding complexity and asymptotically capacity-approaching performance over erasure channels with any erasure statistics. They have been recently recognized as a simple and efficient solution for packetized video transmission over networks with packet erasures. However, to adapt the error correcting capabilities of rateless codes to the unequal importance of scalable video, Unequal Error Protection (UEP) rateless codes are proposed as an alternative to standard rateless codes. In this paper, the authors extend their recent work on UEP rateless codes called Expanding Window Fountain (EWF) codes in order to improve their UEP performance.

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