Predictive coding based on the grads of neighbor coefficient is proposed to encode LL subband because LL subband occupied a majority of energy of transform coefficient.
由于LL子带占据变换系数的大部分能量，提出一种基于邻域系数的梯度的预测编码单独编码LL子带。
Predictive coding based on the grads of neighbor coefficient is proposed to encode LL subband because LL subband occupied a majority of energy of transform coefficient.
由于LL子带占据变换系数的大部分能量，提出一种基于邻域系数的梯度的预测编码单独编码LL子带。
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