Context-based ordering and coding of transform coefficient bit-planes for embedded bitstreams
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United States of America Patent
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Jul 17, 2001
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app pub date -
Sep 25, 1998
filing date -
Sep 25, 1998
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Abstract
A method of generating an embedded bitstream from quantized Wavelet transform coefficients includes the steps of separating the quantized coefficient bit-planes into a plurality of subsequences, ordering the subsequences according to decreasing expected distortion reduction per expected bit of description, encoding the subsequences, and appending the encoded subsequences to the bitstream as ordered. The subsequences may be ordered according to a priori assumptions about the expected distortion reduction per expected bit of description. The subsequences may be coded by adaptive run length coding such as adaptive elementary Golomb coding.
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