Instead of many algorithms rely on accurate estimation of noise variance, this algorithm estimates noise energy through DCT which extracts local feature.

该算法不依赖于对噪声方差进行估计，直接利用DCT变换对高频各个子带进行局部特征提取，从而估计噪声能量的估计阈值。

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Instead of many algorithms rely on accurate estimation of noise variance, this algorithm estimates noise energy through DCT which extracts local feature.

该算法不依赖于对噪声方差进行估计，直接利用DCT变换对高频各个子带进行局部特征提取，从而估计噪声能量的估计阈值。

youdao