查询词典 subband

Then, it introduces an adaptive blind watermark algorithm based on odd-even judgement. This algorithm uses the neighboring symbols mean value and the odd-even judgement to embed the watermark into the 2-level subband of the carrier image. The results of the test demonstrate that this algorithm has a good imperceptivity and robustness.

然后，在此基础上介绍了一种基于奇偶判决的图像自适应盲水印算法，该算法利用图像小波系数的相邻特征平均值和奇偶判决法在图像小波域的二阶子带上嵌入水印，试验结果表明该方法具有不错的不可见性和鲁棒性。

Then, incomplete beta function is applied to enhance the image′s global contrast in the low frequency subband, and nonlinear gain function is used to process the coefficients at each scale in the directional bandpass subbands respectively, which suppresses small coefficients and enhances big coefficients by threshold denoising method.

引入非完全贝塔函数对低频子带系数进行处理，提升图像整体对比度；采用非线性增益函数对各带通方向子带系数进行处理，通过估计噪声水平设定阈值，抑制绝对值小于阈值的系数，增强大于阈值的系数。

Based on a localization principle and subband decomposition, monoscale ridgelet and curvelet were proposed, both of which were derived from ridgelet transform and can efficiently deal with smooth images with smooth edges including straight and curve singularity. They, hence, are of better application potention. sparse representation;optimal basis;ridgelet;curvelet;image denoising;non-parametric estimation

单尺度脊波和Curvelet变换由脊波变换发展而来，分别利用了函数局部化和频带剖分的思想，将脊波理论发展到了一个更高的阶段，这两种变换都能"近似最优"的表示直线和曲线奇异，因而具有更好的应用前景。

The design method aims at minimizing aliasing in the subband signals as well as minimizing resisual aliasing, system distortions in the reconstructed output signal.

讨论过采样系统的子带混叠、系统输出中的混叠和系统失真，推导并给出了一个相对简单的非线性优化算法。

We also show that the long wavelength gap of the inter-subband mode is proportional to the energy spacing between the ground and the first excited energy levels △〓 rather than to 〓.

还发现带间等离激元模的长波能隙正比于基态与第一激发态之间的间距△〓，而不是与〓成正比。

Also,it can overcome frequency aliasing effect in general subband coding,and is more flexible than the resolution-layered coding which uses temporal subsampling and spacial filter.

另外，它比采用时间方向亚抽样和空间滤波器的分辨率分层方法更灵活，并克服了频率混叠现象。

An image fusion scheme based on the wavelet transform and an image compression algorithm based on zero-tree coding are proposed, aiming at the demand of the Intelligent Transportation System. The algorithm is used to fuse visible image and infrared image with wavelet transform and then to compress the fused image by fully employing the importance degree of the subband coefficients and visual characteristic of mankind. So it enhances the integrality and oneness of the traffic information availably and also improves the quality of the system greatly.

针对智能交通系统信息采集的需要，提出基于小波分析的图像融合和零树编码的小波图像压缩算法，利用小波变换将红外和可见光图像进行融合，利用各子带小波系数对图像恢复的重要程度和人眼的视觉特性对融合图像进行压缩，算法的实际应用提高了所采集的交通信息的完整性、统一性和容错性，并改善了智能交通系统的服务质量。

The optimal thresholds and neighboring window sizes are determined for every subband in the wavelet domain using Stein's unbiased risk estimate, and NeighShrink is also extended from orthogonal wavelet transforms to dual-tree complex wavelet transforms in this paper.

该文运用Stein的无偏风险估计，在小波域每一个子带为NeighShrink方法确定一个最优的阈值和邻域窗口，并将NeighShrink方法从正交的小波变换推广到对偶树复数小波变换。

We propose a new variable bitrate, subband speech coding scheme which is combined the CELP with wavelet decomposition technique and vector quantization etc.

大量实验表明，这种方法在实现了大比例压缩编码和子带分割的灵活性的情况下，总的编码效果是满意的。

Animal's welfare can be feed back from their vocalism. We had some experiments to get 35 days old chicken's vocalization in different environment, including normal environment、 light off environment and people's disturbing environment. On the base of Mel Frequency Cepstral Coefficient, We introduction a new algorithm for feature extraction---Subband Mel Spectrum Centroid. We used support vector machine classification model to evaluate the performance of using different sound parameters.

本文通过研究35日龄海兰褐蛋鸡在正常状态、光照与人为干扰等应激下发声信息的变化特征，提出基于子带梅尔频谱质心的优化特征参数，并通过建立支持向量机模型，比较了采用优化特征参数与梅尔频标倒谱系数及其一阶、二阶导数组成的特征参数（MFCC_39）在识别不同应激中的应用效果。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。