In binary shape coding, a motion estimation(ME) and motion compensation(MC) method for higher compression ratio requires large side information overhead. In this paper, we propose a new ME/MC scheme which does not need to transmit the motion vectors(MV) for context-based arithmetic encoding(CAE).
High correlation between levels in a multi-resolution pyramid structure of CAE enables the encoder and decoder to predict MVs successfully without transmitting them by performing ME using only causal pixels in both sides. Not only block substitution but CAE using context composed of pixels in current and previous frames is adopted as a MC method to utilize temporal correlation.
In comparison with the previous MC method using texture MVs, the proposed method is proven to give improved coding efficiency for most test sequences.
