A context based adaptive arithmetic coding technique for losslessimage compression

摘要

Significant progress has recently been made in lossless imagencompression using discrete wavelet transforms. The overall performancenof these schemes may be further improved by properly designing efficientnentropy coders. A new technique is introduced for the implementation ofncontext based adaptive arithmetic entropy coding. This technique isnbased on the prediction of the value of the current transformncoefficient, using a weighted least squares method, in order to achievenappropriate context selection for arithmetic coding. Experimentalnresults illustrate and evaluate the performance of the proposedntechnique