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In this paper, the authors present a novel scheme for optimal OFDMA subcarrier allocation towards video quality maximization employing the paradigm of H.264 based Scalable Video Coding (SVC). They deduce the rate and quality model parameters for video characterization of the SVC extension of the H.264/AVC and propose an optimization framework for sum quality maximization of the transmitted video streams in unicast and multicast 4G scenarios. They derive the closed form solution for optimal quantizer selection towards net video quality maximization subject to rate constraints of the unicast/multicast users, taking into account the different modulation and coding rates of the multicast groups in the 4G wireless system.
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