A context based adaptive arithmetic coding technique for lossless image compression

Significant progress has recently been made in lossless image compression u sing discrete wavelet transforms. The overall performance of these schemes may be further improved by properly designing efficient entropy coders. In this letter, a new technique is introduced for the implementation of contex t-based adaptive arithmetic entropy coding. This technique is based on the prediction of the value of the current transform coefficient, using a weigh ted least squares method, in order to achieve appropriate context selection for arithmetic coding. Experimental results illustrate and evaluate the pe rformance of the proposed technique.