Generalized multiple description coding with correlating transforms
IEEE Transactions on Information Theory
Multiple description coding using pairwise correlating transforms
IEEE Transactions on Image Processing
WYZE-PMD based multiple description video codec
ICME '03 Proceedings of the 2003 International Conference on Multimedia and Expo - Volume 2
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In this paper we are concerned with multiple description coding of predictively encoded sequences at low rates/redundancies. The key problem to be solved is that of avoiding predictive mismatch. We propose an algorithm based on Multiple Description Correlating Transforms (MDCT), which avoids the problem of predictive mismatch while not increasing the number of transmitted coefficients. Under a general first-order, Gauss-Markov source model, carefully formulated to be applicable to the practically important case of video coding, we obtain closed-form expressions for the operational rate-distortion characteristics of the proposed algorithm and use these to optimize the algorithm encoding parameters. In the case of the residual-of-residuals technique~\cite{rf:ror}, which is also based on MDCT, we show that incorporation of any redundancy between the transmitted descriptions is inherently suboptimal. Results show that the proposed algorithm significantly outperforms the residual-of-residuals technique at low rates.