codeword meaning in Chinese
符号语
码字
Examples
- A novel public key encryption scheme with multiple private keys is presented . the security of this encryption method depends on the difficulty of the decoding problem for block codes over finite fields . based on the encryption method , a pirate tracing scheme is proposed for the copyright protection of digital data . in this tracing scheme , for each legal copy of digital data there is a codeword buried in the corresponding decryption software or box . the scheme can extract the codeword efficiently , and uncover all authorized users involved in making the illegal copy by using a proper decoding algorithm if the number of such users is not more than the error - correcting capacity of a given code . compared with known tracing schemes , this scheme is efficient in performance , and easy in implementation . potential applicable areas of the encryption method include the protection of copyrights of various forms of digital data such as computer software and audio / video products
提出了一种新的具有多个私钥的加密方法.这种加密方法的安全性有赖于有限域上分组码译码问题的困难性.根据所提的加密算法,给出了一种适用于数字数据版权盗版跟踪方案.对于每一个数字数据的合法拷贝,给出的跟踪方案都分配一个分组码的码字与该拷贝的解密软件或者相关装置相对应.所提的方案能够有效地提取与解密软件或者装置相对应的码字,并进而利用所用分组码的译码算法找到所有参与非法拷贝制作的合法授权用户,其中,假设参与数字数据非法拷贝的合法用户数不超过所用码的纠错能力.与其他已有方案相比,所提方案具有更好的性能,并且容易实现.所提加密方案的潜在应用领域包括计算机软件、视频/音频等产品的数字数据版权保护方面 - The paper analyzes binary - split gradient & threshold initial codebook generation - algorithms , codebook generation algorithms based on kohonen self - organizing feature map neural network , a fast codeword searching algorithm using l2 - norm pyramid data structure , side - match vector quantization algorithms , and a fuzzy classified vector quantization algorithm , systematicly explores their application to image compression , computer simulation results show that they are practical and efficient
文中重点分析了二元分裂梯度与阈值初始码书生成算法、基于kohonen自组织特征映射神经网络的码书生成算法、基于l2范数金字塔数据结构的快速码字搜索算法、边缘匹配矢量量化算法、模糊分类矢量量化算法，系统地研究了它们在图像压缩编码中的应用，并进行了计算机仿真，实验结果表明这些算法是实际有效的。 - Firstly , based on conventional vq , a fast algorithm named equal - sum block - extending nearest neighbor search ( ebnns ) is presented , which not only can achieve the reconstructed image of full search algorithm but also can greatly reduce both the codeword search ratio and chip area . in order to improve coding efficiency , a new algorithm called correlation - inheritance coding is proposed , which is embedded in conventional vq system to improve compression ratio by re - encoding the indexes
首先，在普通矢量量化基础上提出了等和值块扩展最近邻快速码字搜索算法( ebnns ) ，该算法在图像画质达到穷尽搜索算法的前提下，大大降低了码字搜索率和硬件实现面积；为了提高编码效率，在相关性编码方面，提出了相关继承编码算法，对普通矢量量化后的编码索引进行无损重编码。 - Because the watermark embedding and the noisy channel were directly related to the codeword index order in the model , at the same time deciding the codeword index was a np - hard problem typically , so the ant colony algorithm was introduced to optimize it in order to make the bit error rate lower and the embedded watermark more invisible
在该模型中，由于水印嵌入和通道噪声直接与码字索引相关，所以该模型误差由索引值决定，又由于码字索引的确定是np难度问题，故引入蚁群算法对其优化是方便的，优化目标是降低误码率和使不可见性达到最佳。 - The paper presents a modified fuzzy kohonen neural network clustering algorithm fit for image compression , which is applied to codebook generation , theoretic analysis and computer simulation results shows that it can solve some problems which exist in ordinary kohonen self - organizing feature map neural network algorithms and improve encoding quality . the paper also presents a fast correlation - side match algorithm , which is applied to codeword searching for image vector quantization and has a good result
本文提出一种适用于图像压缩的码书生成算法? ?改进的模糊kohonen神经网络分类算法，通过理论分析和计算机仿真，表明该算法能够解决普通的kohonen自组织特征映射神经网络算法存在的一些问题，且使编码质量有所改善。文中还提出了快速相关?边缘匹配算法，将其应用于图像矢量量化中的码字搜索过程，取得了良好的效果。