传统方法是通过空域或频域采样，得到该子噪声图像，然后直接对其估计方差，它对图像信息的分布有要求。
The traditional way is to obtain the sub-image by sampling the noised image in spatial or frequency domain, then calculate its variance to replace that of the original noise.
首先对语音音素进行时域、频域、能量值的提取，然后通过计算得到每个采样点的组合特征值，描绘成图像。
Firstly, phonemes should be extracted on the time domain, the frequency domain and energy then the combination character of each sample and map figure were calculated.
先从滤波器和信号的频域特性出发给出了滤波器在频域的采样率匹配原则。
According to the frequency domain character of the filter and signal, the sampling rate matching principle of the filter in frequency domain is given in the first part of the paper.
该方法采用少量FCPR信号子脉冲对目标频域响应进行采样，即可提取目标高分辨距离像信息。
Target frequency domain response is sampled with only a few FCPR sub-pulses, from which target high resolution range information is reconstructed exactly.
该方法采用少量FCPR信号子脉冲对目标频域响应进行采样，即可提取目标高分辨距离像信息。
Target frequency domain response is sampled with only a few FCPR sub-pulses, from which target high resolution range information is reconstructed exactly.
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