Wavelet inverse transform method and apparatus and wavelet decoding method and apparatus
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United States of America Patent
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Nov 20, 2007
Grant Date -
Jan 19, 2006
app pub date -
Sep 19, 2005
filing date -
May 27, 1999
priority date (Note) -
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Abstract
A wavelet inverse transform method includes a decoding object coefficient extracting step of extracting only coefficients necessary for decoding a specified area from wavelet transform coefficients, and a wavelet inverse transform step of inverse transforming coefficients extracted from the decoding object coefficient extracting step. The decoding object coefficient extracting step extracts transform coefficients not only inside the specified area but also those outside the specified area. This enables only an optional partial picture to be decoded without decoding the entire picture. A corresponding wavelet inverse transform device is also disclosed.
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