Video codecs that use motion compensation have shown PSNR gains from the use of multiple frame prediction, in which more than one past reference frame is available for motion estimation. In dual frame motion compensation, one short-term reference frame and one long-term reference frame are available for prediction. In this paper, we explore using dual frame motion compensation in two contexts. We first show that using a single fixed long-term reference frame in the context of a rate switching

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... twork can enhance video quality. Next, by periodically creating high-quality long-term reference frames, we show that the performance is superior to a standard dual frame technique that has the same average rate but no high-quality frames. Index Terms-Dual frame buffer, long-term reference frame, motion compensation.