E-LTW: An enhanced LTW encoder with sign coding and precise rate control

Traditional embedded coding systems involve high complexity algorithms, requiring fast and expensive processors. In the last years, several authors have developed very fast and simple non-embedded wavelet encoders that are able to get reasonable good performance with reduced computing requirements. These encoders have lost the SNR scalability and precise rate control capabilities. In this paper, we propose a new non-embedded LTW codec version (E-LTW) with precise rate control method and good R/D performance due to the use of intra band neighboring context modeling for sign coding.