Patent ID: 7492955

Claim:
An entropy encoder for encoding input image data into a compressed data stream, said entropy coder comprising: a reversible wavelet filter to transform the input image data into a plurality of coefficients based on a parameter, the reversible wavelet filter to apply a reversible wavelet transform to the input image data, wherein the reversible wavelet transform is implemented in integer arithmetic such that, with integer coefficients, integer input image data is losslessly recoverable, wherein the parameter indicates a number of decomposition levels the reversible wavelet filter is to perform; an ordering and modeling mechanism coupled to the reversible wavelet filter, said ordering and modeling mechanism being operable to generate an embedded codestream in response to the plurality of coefficients; and an entropy coder, coupled to the ordering and modeling mechanism, operable to entropy code the embedded codestream to produce the compressed data stream that represents the input image data in a respective imaging application.