The problem of broadcasting a parallel Gaussian source over an additive whiteGaussian noise broadcast channel under the mean-squared error distortioncriterion is studied. A hybrid digital-analog coding strategy which combinessource coding with side information, channel coding with side information,layered source coding, and superposition broadcast channel coding is presented.When specialized to the open problem of broadcasting a white Gaussian sourceover an additive white Gaussian noise broadcast channel with bandwidth mismatchwhich has been the subject of several previous investigations, this codingscheme strictly improves on the state-of-the-art.
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