A DPCM system employing a median predictor, which is called the predictive median-DPCM(PM-DPCM), is proposed. An interesting observation that in PM-DPCM transmission errors are often isolated and not propagated over the reconstructed signal is made, and is analyzed deterministically and statistically. In addition, it is shown that the decoder of the PM-DPCM is always a stable system. In order to examine the performance characteristics of PM-DPCM, it is applied to real images. The results indicated that reconstructed images through the PM-DPCM can be better than those through the standard DPCM when transmission errors occur, and that under noise-free conditions the PM-DPCM performs like the standard DPCM.
