pseudo-random sequence造句
例句与造句
- Evaluation for uniformity of pseudo - random sequences
伪随机序列的均匀性评价 - Investigation and realigation of pseudo - random sequence generator
伪随机序列发生器的研究与实现 - In former method , the watermark is usually the pseudo - random sequence
以往研究的水印多为无意义的水印，例如一个随机数。 - Statistical analysis of the orthogonality between images and pseudo - random sequences
基于统计数学的伪随机序列与图像正交性分析 - Discuss the methods to generate pseudo - random sequences and property of them ; 2
讨论了伪随机序列的产生方法及其性能分析； 2 - It's difficult to find pseudo-random sequence in a sentence. 用pseudo-random sequence造句挺难的
- Use the high - quality pseudo - random sequence to create pseudo - random fsk / psk signal ; 3
用产生的高质量伪随机数设计伪随机fsk / psk信号； 3 - Algorithm and design for pseudo - random sequence ultrasonic spread spectrum distance measurement system
伪随机码超声扩频测距系统设计与算法 - Chapter six studies characteristics and implementations of pseudo - random sequence generator and data scrambling , and fulfills the de - scrambling function with asic
第六章讨论了伪随机序列和数据扰码的特点，并给出了其asic实现方案。 - Pseudo - random sequences with optimal properties such as correlation , high linear spans , balance and long period are widely used in cdma system , spread spectrum and hopping communication systems
具有优良相关性，大线性复杂度，平衡性，长周期的伪随机序列广泛应用于cdma系统，扩跳频通信系统。 - Most of the former watermark techniques usually use pseudo - random sequence as watermark , which produce a sequence randomly in arithmetic for embedding . it only can detect whether the watermark is still remaining or not
以往研究的水印多为伪随机序列，在算法中自动产生一个随机序列将其嵌入，而且检验时只能判断此伪随机序列是否存在。 - This paper is focused on images watermarking algorithms . watermark casting operates in frequency domain , embeds pseudo - random sequence of real number in selected coefficients without image degradation . a blind watermark retrieval technique that can detect the embedded watermark without resorting the original image is proposed , so that the proposed techniques represents a major improvements to those relying on the comparison between the watermarked and original image , which is not practical for a huge image database
本文主要研究针对图像水印系统的算法研究，采用伪随机序列作为水印信号，利用变换域系数作为水印的载体，在不降低图像质量的前提下达到嵌入水印的目的，在恢复水印的过程中无需原始图像的参与，相比较那些需要利用原始图像恢复数据的系统，文中所提出的方案更具有实用性。 - Frequency code is not uniformity distribution and keeps to a probability distribution function defined by the spectral characteristics of the target of interest . the phase code is equally duality pseudo - random sequence and used to reduced the sidelobes of the signal correlation function . and the mismatch - phase sequence is corresponding with the frequency sequence one by one
而频率编码为不均匀分布，由所观测目标的频谱信息提取出概率密度函数决定频率编码序列的分布；相位编码为二元的伪随机序列，采取均匀的二相编码，消减同频脉冲带来的过高的相关函数的旁瓣；而失配相位为与频率编码相一一对应于各子脉冲中。 - In the part of image encryption , chaotic map based on kolmogorov flow is used to permute . changing the traditional stream - cipher , new chaotic pseudo - random sequence generator based on the theory of product cipher is presented to substitute the pixel . based on it , linear map to confuse the pixel is presented further , withstanding statistical attack
在图像加密方面,采用基于kolmogorovflows的混沌映射对图像进行置乱,对传统流加密进行改造,提出了基于乘积密码理论的新型混沌伪随机序列发生器完成象素的混淆,并在此基础上进一步采用线性映射对象素进行扩散以抵抗统计攻击。 - In the part of voice encryption , spatiotemporal chaotic system ( ocoml model ) and lfsr are used to generate multidimensional pseudo - random sequence . this sequence has a longer period , better randomicity , passing the verification of fips 140 - 2 security requirements . using the key stream generated by it to encrypt the voice gets a better security
在语音加密方面,本文利用时空混沌系统(单向耦合映象格子模型)与线性移位寄存器产生了高维的伪随机序列,该序列周期很长,具有更强的随机性,通过了fips140 - 2的安全性能验证,利用其作为密钥流对语音信号进行加密,获得了更高的保密性。 - In this paper we adopt pseudo - random sequence or gray level image as the watermark , choose the dwt coefficients as the carrier , then embed the watermark into the carrier imperceptually . one algorithm accomplishes blind extracting . it presents a symmetric algorithm based on shuffling technique
采用伪随机序列或灰度图像作为水印信号,利用dwt变换系数作为水印的载体,在不降低图像质量的前提下达到嵌入水印的目的,部分方案在恢复水印的过程中无需原始图像的参与。
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