Method and apparatus for encoding and decoding by wavelet transform
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United States of America Patent
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Jul 10, 2012
Grant Date -
May 5, 2011
app pub date -
Mar 29, 2010
filing date -
Jul 17, 2009
priority date (Note) -
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Abstract
A wavelet transform encoding apparatus includes a coefficient encoding unit which encodes each group of multiple wavelet transform coefficients LH, HL, and HH located spatially at the same position within multiple high-frequency subbands belonging to the same hierarchy. At the time, the coefficient encoding unit calculates an encoding parameter for the wavelet transform coefficient of an encoding object based on multiple encoded vicinal wavelet transform coefficients within the multiple high-frequency subbands belonging to the same hierarchy, and encodes the wavelet transform coefficient of the encoding object into a variable-length code by utilizing the calculated encoding parameter.
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