Robust predictive coding and the Wyner-Ziv problem

This paper addresses the problem of robust communication of predictively encoded video in a joint source-channel setting. Specifically, the problem of predictive mismatch, where there is a drift between the state of the encoder and the decoder is addressed as a variant of the Wyner-Ziv problem. We propose a video encoding algorithm based on the H.26L video codec which prevents the propagation of error in predictively encoded video in the event of predictive mismatch (or drift) between the encoder and the decoder. One of the main advantages of the proposed approach is that there is minimal loss in performance over the standard H.26L encoder during error-free transmission, while simultaneously allowing error recovery in the event of errors. Using turbo codes as coset codes, we evaluate the performance of the proposed codec and demonstrate the efficacy of the proposed framework. The performance of the proposed approach can only improve with the use of superior coset codes.