An algorithm for transform coding for lossy packet networks

We propose an algorithm to compute a modification of the classical discrete Karhunen-Loeve transform (KLT) useful when some of the coefficients are randomly unavailable for reconstruction. Such a scheme can provide multiple description coding (MDC) for signals and images transported by lossy packet links. The modification of the KLT is based on a "correlating" block that, from knowledge of the channel erasure statistics, is optimized with a gradient algorithm to provide minimum average reconstruction error. A set of simulations show appreciable improvements over standard schemes