STACK-RUN IMAGE-CODING

We describe a new image coding approach in which a 4-ary arithmetic co der is used to represent significant coefficient values and the length s of zero runs between coefficients. This algorithm works by raster sc anning within subbands, and therefore involves much lower addressing c omplexity than other algorithms such as zerotree coding that require t he creation and maintenance of lists of dependencies across different decomposition levels, Despite its simplicity, and the fact that these dependencies are not explicitly utilized, the algorithm presented here is competitive with the best enhancements of zerotree coding, In addi tion, it performs comparably with adaptive subband splitting approache s that involve much higher implementation complexity.