Motion-compensating long-term memory prediction

Abstract

Motion-compensating long-term memory prediction ex-tends the spatial dislplacement utilized in block-based hybrid video coding by a variable time delay permitting the use of more frames than the previously decoded one for motion compensaition. The long-term memory co-vers the decoded franies of some seconds at encoder and decoder. We investiflate the influence of memory size in our motion compensation scheme and analyze the trade-off between thtc bit-rates spent for motion com-pensated prediction and residual coding. Simulation results are obtained by integrating long-term memory prediction into an H.263 codec. PSNR improvements up to 2 dB for the Foreman sequence and 1.5 dB for the Mother-Daughter seqhence are demonstrated in compa-