quantization step

and when the quantization step in a region is the same one, we discussed it when the embedded component is one region of the image or all.

而且在用统一的量化步长时，我们分别就嵌入部分分别为图像的某一区域和各个区域进行讨论。

current quantization step estimation algorithm is based on the histogram of dct coefficients.

现有量化步长估计算法是基于DCT系数的统计直方图进行。

using encryption technology to improve security, it means to adaptive select the quantization step in wavelet low frequency coefficient.

水印嵌入时利用加密技术来提高水印的安全性，依据小波低频系数自适应的选取量化步长。

how can we decide the subband bit allocations and quantization step sizes so that the mean squared errors are minimum?

■优化的子带位率分配和量化器步长能使得编码的均方误差值最小。

with the established scheme, the quantization parameter can be determined directly, thus avoiding the round-off error, which is brought by the transformation from quantization step into quantization parameter.

由于该方案可以直接确定量化参数，从而避免了由量化步长转化为量化参数产生的舍入误差。

since the quantization step changes synchronously with the multiplication noises, this algorithm is robust to multiplication noises in principle.

由于量化步长与乘性噪声能同步变化，因此在原理上该算法对乘性噪声具有良好的鲁棒性。

the quantization step is adjusted through the neural network according to the statistics of the blocks, and then the watermark is embedded on the singular value of the blocks.

根据各个分块的统计特性，利用神经网络来确定的各个分块的量化步长，将水印嵌入到各个分块的奇异值。

the simulation results indicate that embedding watermark in the lsb ( least significant bit) of the dct coefficients corresponding to smaller quantization step in the quantization table can remit the conflict between the dct coefficients to be protected and invisibility without dropping the capability of resisting jpeg compression.

分析和实验结果表明，水印信息嵌入在量化步长较小的量化DCT系数的最低位，既不影响算法抗JPEG压缩的能力，又能有效缓解待保护DCT系数个数与不可见性之间的矛盾。

deadtime negative real axis ultimate gain ultimate period sampling interval sampling period word length integration offset quantization step

死区时间负实轴极限增益极限周期采样间隔采样周期字长积分偏差量化步长

through analyzing the statistical law between quantization steps and compression ratios, a quantization step design algorithm is proposed to reduce time overhead.

通过分析量化步长与压缩比之间的统计规律，提出基于统计规律的量化步长设计，减少冗余编码。

a new image blind watermarking algorithm based on adaptive quantization step in discrete wavelet transform ( dwt) is proposed, which can be used in copyright authentication.

提出了一种可用于版权认证的基于小波变换域自适应量化步长的图像盲水印算法。

at the same time, the location of block boundary can be localized through the location of the maximum of the icm. secondly, this paper improves the current quantization step estimation algorithm, and proposes two novel algorithms to estimate quantization table.

同时，根据ICM中最大值出现的位置能定位出图像的块边缘。其次，本文改进了现有量化步长的估计算法，并提出了两种估计量化表的算法。

then the different quantization step and fixed length coding for each sub band are carried out in accordance with its energy statistical property of the coefficients. the proposed robust image coding, which bit rate is 0.8 bits/ pixel, is suitable to the underwater acoustic channel.

依据小波系数的能量分布特性，对不同的子带采用不同的量化和定长编码，编码率为0.8比特/像素。

quantization step of the adc

模数转换器的量化步距

after carefully analyzing the effect of quantitative parameters for video coding, the paper points out the influence from the quantization step for video coding energy consumption, video coding rate and the video coding quality.

本文在仔细分析了编码参数对视频编码影响的基础上，指出量化步长是影响视频编码能耗、编码码率和编码质量的重要参数之一。

a new method for estimating the primary quantization step of jpeg double-compression

一种估计JPEG双重压缩原始量化步长的新方法

a robust image blind watermarking algorithm based on adaptive quantization step in dwt

一种鲁棒的基于DWT域自适应量化步长的图像盲水印算法

in this paper, a robust public watermark algorithm in dct domain is presented. the algorithm takes advantage of the round-off errors during the quantization step of jpeg compression and binary logic to embed the watermark.

提出了一种基于DCT的鲁棒公开水印算法，算法利用JPEG压缩量化阶段的舍入误差，结合二值逻辑进行水印嵌入。

the algorithm is based on the optimum quantization step for each dwt coefficient according to psychovisual considerations which derived from methods in image compression.

本文的算法基于图像压缩算法中利用心理视觉给出的DWT系数的最优量化步骤。

in new adjuster the range of quantization step has been limited well and coding error has been removed in single or some little frames.

在新的调节器中，限制了量化步长（Q）的范围，消除单个或者少数几帧产生的编码误差。

in quantization step quantization gene is an important parameter in video stream control. the enactment of this parameter is determined by buffer occupancy.

量化阶段量化因子是一个控制码率的重要参数，这个参数的设定主要是结合缓冲区的占用容量。

quantization step of each coefficient is automatically computed in terms of the jnd to adaptively embed watermarking.

在量化过程中，根据人眼视觉模型可见临界误差来确定每个系数的量化步长，实现了水印的自适应嵌入。

therefore, on the premise of battery energy state division, the rate-distortion model which based on quantization step is established under the three energy levels. ( 3) establish video coding power-rate-distortion model under different energy states.

因此，在电池能量状态划分的前提下，建立了三种能量级别下的基于量化步长的率失真模型。（3）建立不同能量状态下的手语视频编码功率率失真模型。

in this paper, the dynamic changes of uniform quantization step size are presented which can improve the control performance significantly. this quantization scheduling strategy can be extended to more general multi-loop network control system. 3.

本文提出通过采用动态改变均匀量化器的步长来实现对带宽受限下多控制回路的CAN总线系统进行有效调度的策略，本策略可推广到更一般的多回路共享网络资源的网络控制系统。

therefore, the quantitative parameters are chosen as the model parameters and the energy consumption model of video coding is established by quantization step.

因此，选用量化参数作为建模参数，建立了基于量化步长的视频编码能耗模型。

watermark embedding is performed by means of quantization index modulation, the quantization step of which can be dynamically adjusted according to the local image characteristics and the human visual system.

水印的嵌入采用量化调制方式，其量化步长可根据人类视觉系统和载体图像的局部特点自适应地调整。

the human ear can not perceive the difference of speech quality between original speech and reconstructed speech while the phase quantization step size is little than π/ 7.

当相位的量阶小于π/7时，人的听觉系统将分辨不出重建语音和原始语音之间存在的差异。