HYBRID BLOCK TRUNCATION CODING

A hybrid block truncation coding (BTC) is presented in this work. In t he hybrid ETC, a universal codebook using Ramming codes and a differen tial pulse code modulation (DPCM) are employed, respectively, to the b it plane and the side information of ETC to reduce coding rate. Simula tion results reveal that the performance of the proposed algorithm is only slightly worse than that of the hybrid ETC using vector quantizat ion (VQ) techniques, but with much lower computational or hardware com plexity.