Based on wavelet decomposition and cepstrum technology, an audio watermarking algorithm was proposed in which the low-frequency wavelet coefficients were chosen for cepstrum transforming.
提出了一种基于小波分解和倒谱技术的音频数字水印算法，该算法通过对原始音频进行小波多级分解，从中选取低频系数进行倒谱变换。
Filtering algorithms base on space, frequency, wavelet and time have been introduced to reduce noises caused by environmental and lighting conditions in the video image sequences.
针对视频图像存在由于环境、光照等原因所引起的噪声的特点，应用基于空间域、频域、小波域和时域等多种去噪方法。
Under a fixed seismic frequency, wavelet side lobes may increase the difficulty of interpreting and recognizing thin sand bodies.
在地震资料频率一定的情况下，地震子波旁瓣效应会增加薄砂岩识别和解释的难度。
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