A hybrid image coder: adaptive intra-interframe prediction using motion compensation - Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on

A hybrid image predictive coding method is presented. The intraframe predictor is an adaptive FIR filter using the wellknown LMS algorithm to track continuously spatial local characteristics of the intensity. The interframe predictor is motion-adaptive using a pel-recursive method estimating the displacement vector. A weight coefficient is adapted continuously in order to favour the prediction mode which performs better between intraframe and motion compensation mode. For the sequence examined a significant improvement is obtained in comparison with only adaptive intraframe or only motion compensation mode. A crucial problem in predictive coding, particularly with adaptive techniques, is that of sensitivity to transmission errors. A method ensuring the autoadjustment of the decoder in the presence of isolated transmission errors is proposed for the intraframe mode. Neither overhead information nor error-correcting code are needed.