A predictor based on three previous ‘pels’ along a scan line is examined for d.p.c.m. encoding of composite Pal signals. The predictor coefficients are described in terms of the ratio of sampling frequencyfsto colour subcarrierfsc. Predictions based on p.e.l.s on the second previous and previous lines are derived for the case offs/fsc= 2.5. Simple 2-dimensional predictors are then formed and used in the d.p.c.m. encoding of a Pal colour-bar signal.