利用高阶谱进行系统辨识，估计得到点扩散函数，然后再进行傅域或小波域的解卷处理。由此得到的超声图像，分辨率大大提高了。-System identification using higher order spectrum, is estimated to be the point spread function, and then for Fu domain or wavelet domain deconvolution processing. The resulting ultrasound im

Speech Based Watermarking for Digital Images This paper presents a novel scheme of watermarking of digital images for copyright protection and authentication. In this paper we proposed a method of embedding owner’s speech signal. Speech being