The digital wat remark technique based on a wavelet transform is a method for protecting multi media video data, belonging to the multi media signal processing area.
本发明涉及一种基于小波变换的数字水印技术，是一种多媒体视频数据保护方法，属于多媒体信号处理领域。
With the development of modern science and technology, as a multidisciplinary and comprehensive subject, digital speech signal processing has become a hot research area nowadays.
随着现代科学技术的蓬勃发展，数字语音信号处理作为一个跨学科、综合性的研究领域已成为当今的一个研究热点。
In the area of signal processing, many signals we encounter are non-stationary, such as radar signals, seismic waves and sonar signals etc.
在信号处理领域中遇到的许多信号都是非平稳信号，如通信信号、某些雷达信号、地震波、声纳等。
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