Moving-picture encoding apparatus and moving-picture decoding apparatus
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United States of America Patent
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Sep 29, 2015
Grant Date -
Jun 19, 2014
app pub date -
Feb 21, 2014
filing date -
Jan 7, 2010
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Abstract
According to one embodiment, an encoding apparatus includes a prediction unit, a classifying unit, a first transformer, a second transformer, an order controller, and an entropy coder. The prediction unit obtains a predictive residual signal to be encoded, by using a mode selected from intra-prediction modes. The first transformer obtains first transformation coefficients by subjecting the signal to an orthogonal transformation by use of a first transformation basis if the selected mode is classified into a mode having a prediction direction. The first transformation basis is preset so that a coefficient density after the orthogonal transformation is higher than a coefficient density.
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