Improved Design of UEP-LDPC Encoder Using Two-Stage Dynamic Programming in Image Transmission
Irregular low-density parity-check (LDPC) codes can provide an unequal error protection (UEP) capability naturally by unequal degree distribution. In this paper we propose a new architecture of UEP-LDPC encoder based on the method of Richardson and Urbanke in image transmission. In order to reduce processing complexity and hardware consumption, we also present a novel two-stage dynamic programming algorithm to perform matrix triangulation instead of traditional approach. Experiment results show the optimization architecture and algorithm can provide high UEP capability and reduce encoding complexity significantly.
KeywordsUEP LDPC Encoder Two-stage dynamic programming
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