noise like signal 中文意思是什麼
noise like signal
解釋
類噪聲信號-
In general, a watermark system must satisfy the two basic requirements : imperceptibility and robustness. in this thesis, we proposed a frequency - based watermarking algorithm using toral automorphisms, in which a kind of toral automorphism is employed to mix a recognizable binary image ( bw ), which contains the copyright information, into a noise - like signal
演算法簡單描述如下:首先用一個環形自同構映射把要嵌入的數字水印映射成偽隨機噪聲,然後把該偽隨機噪聲嵌入到宿主數據頻域的低頻段中,接著把得到的頻域系數進行相應的逆變換得到嵌入水印的圖象,最後對該嵌入水印的圖象進行視覺掩蔽處理。 -
We find that all the results are quite different between each original emg and its ten surrogate data, i. e. emg is not a linear random noise, but a nonlinear deterministic signal ( though it does not like a low dimensional chaos )
也就是說,肌電不是線性隨機的噪聲,而是非線性的確定性信號(盡管它並不象是低維混沌) 。
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