Noise-robust recursive motion estimation for H.263-based videoconferencing systems

The key element in realizing low cost real-time software implementations of a H.263 videoconferencing system is a fast motion estimation algorithm, which only slightly decreases coding efficiency. We propose a spatio-temporal recursive estimator that combines an excellent coding efficiency with a high computational efficiency. Experimentally, the new algorithm proves to be comparable to full-search block matching when encoding typical videoconferencing sequences in presence of additive noise, even though the computational burden has been greatly reduced