Many image coders map the input image to a transform domain, and encode

coefficients in that domain. Usually, encoders use previously transmitted

samples to help estimate the probabilities for the next sample to be encoded.

This backward probability estimation provides a better PDF estimation, without

need to send any side information. In this paper we propose a new method

of encoding that goes one step further: besides past samples, it also uses information

about the current sample in computing the PDF for the current

sample. Yet, no side information is transmitted. The initial PDF estimate is

based on a Tarp filter, but probabilities are then progressively refined for nonzero

samples. Results are superior to JPEG2000, and to bit-plane Tarp.

PDF file

In  DCC

Publisher  IEEE

Details