estimation of variance of noise
... 用协方差估计 estimation by covariance 噪声方差估计 estimation of variance of noise 总体方差估计 estimation of population variance ...
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estimation of variance of noise
噪声方差的估计
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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。
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