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• The improved AFT algorithms for even and odd functions can also be used for computing discrete cosine transform (DCT) and discrete sine transform (DST), respectively.

本文改进的偶函数函数AFT算法分别可以用来计算离散余弦变换(DCT)和离散正弦变换(DST)。

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• In this paper, a new fast algorithm to calculate discrete cosine transform (DCT) with arbitrary length by means of the butterfly structure is presented.

本文提出离散余弦变换(DCT)一种新的快速算法，其特点变换长度任意，而且采用蝶形结构

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• A watermarking scheme based on the discrete cosine transform (DCT) was studied. A new blind watermarking algorithm by embedding the watermark into the phase components of DCT was proposed.

基于离散余弦变换(DCT)方法对水印算法进行了研究，提出一种新的水印嵌入到分块dct相位成分水印算法。

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• Data correlation coefficients were calculated and switch regions were analyzed by using two dimension discrete cosine transform (DCT) in ray-space data compression.

光线空间的数据压缩中，计算了数据的相关系数采用离散余弦变换(DCT)进行变换分析。

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• A new method for predetermination of all-zero blocks in low rate video coding is proposed, which is based on characters of discrete cosine transform (DCT) and quantization.

该文根据离散余弦变换(DCT)量化运算特点提出了一种新的用于比特视频编码的全零预先判别方法

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• It is a new method that calculate vertical second derivative of gravity anomalies based on discrete cosine transform (DCT).

基于离散余弦变换(DCT)重力异常垂向阶导数计算方法笔者提出的方法

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• There are two main transform domain methods, one is to use the discrete cosine transformation (DCT); the other would be the use of discrete wavelet transforms (DWT).

目前主要两种变换方法使用离散余弦变换(DCT)，一种使用离散小波变换(DWT)。

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• Variable characteristics were captured in discrete cosine transform (DCT) domain of JPEG images and from their decompressed versions with these functions.

这些函数JPEG图像离散余弦变换(DCT)及其解压图像所在空域提取易变特征

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• In the paper, a speech endpoint detection method based on DCT (Discrete Cosine Transform) enhancement and improved spectral entropy is proposed.

提出了基于DCT(离散余弦变换)增强改进语音端点检测方法

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• We have also studied the variance spectral configuration of the surface wind field using DCT (Discrete Cosine Transform).

采用离散余弦转换(DCT)对其方差波谱结构进行了讨论。

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• The discrete cosine transform (DCT) is an important mathematical tool in digital image processing and many other fields.

离散余弦变换(DCT)数字图像处理许多领域重要数学工具

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• This paper proposes a robust watermarking algorithm for volume data based on three-dimension discrete cosine transform(3D-DCT) and spread-spectrum communication technique.

本文基于离散余弦变换3D-DCT）技术扩频通信技术提出三维数据鲁棒水印嵌入算法

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• A novel discrete cosine transform (DCT) based automated phase measurement method is proposed and verified by a simulation and experiments.

本文提出以离散余弦变换(DCT)为基础自动相位测量方法实验模拟运算进行验证

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• To improve the simulation precision and speed of LTI system, the highly precise simulation algorithm of LTI system based on Discrete Cosine Transform(DCT) is proposed.

为了提高线性定常系统仿真精度速度提出基于快速DCT线性定常系统高精度仿真算法

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• The ac coefficients of an image's Discrete Cosine Transform (DCT) are best approximated by Laplacian distribution model. Based on this model, the blind information hiding algorithm was proposed.

基于图像离散余弦变换(DCT)交流系数拉普拉斯分布模型，提出了一种提取数字图像信息隐藏算法。

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• The image compression standard in PACS now is the JPEG standard based on the DCT (Discrete Cosine Transform) algorithm, which can only be applied in the limited areas.

目前PACS系统中较多采用JPEG图像压缩标准标准采用离散余弦变换算法为主区块编码方式，有一定的局限性。

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• Based on the Discrete Cosine Transform (DCT) coefficient histogram difference sequences of JPEG images, a new steganalytic method was proposed to realize the steganalysis of JPEG MB2.

基于JPEG图像离散余弦变换DCT系数直方图序列提出一种新的检测JPEGMB2隐写方法

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• Discrete cosine transform (DCT) is a hypo-optimal transform approach similar to KL transform.

DCT变换种与KL变换非常相似的次最优变换算法。

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• This paper addresses the digital image watermarking techniques based on discrete cosine transform (DCT).

本文主要研究了DCT数字水印算法静止图像中的应用问题。

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• This paper introduces how to use DCT (discrete-cosine transform) in data-hiding technology in image, and its fundamental theory and algorithms, special improvements of existing algorithms.

该文主要介绍了如何利用离散余弦变换(DCT)实现对于图象文件的数据隐藏技术，详细说明了技术的基本原理实现方法，以及现有算法的改进

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• Discrete cosine transform (DCT) is an effective method to signal enhancement.

离散余弦变换信号增强有效方法

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• The fast algorithm based on discrete cosine transform (DCT) and its complexity are obtained and the selection of the best basis is discussed.

给出了离散余弦变换(DCT)实现快速算法复杂度，并考查优基的选取

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• A steganalysis algorithm based on statistical characteristics of DCT (Discrete Cosine Transform) coefficients for JPEG (Joint Photographic Experts Group) image was proposed.

提出一种基于DCT(离散余弦变换)系数统计特性JPEG图像隐写分析算法

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• Based on the grid multi-scroll Chua's chaotic attractors and Discrete Cosine Transform (DCT) algorithm, a novel digital image watermark algorithm is proposed in this paper.

基于网格状多涡卷蔡氏混沌系统离散余弦变换(DCT)理论，提出改进的数字水印算法

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• This paper describes a FPGA design for two dimensional Discrete Cosine Transform (2d-dct) used in JPEG medical image compression.

本文介绍了一种适用于J PEG医学图象压缩dctF PG A设计方案。

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• This paper describes a FPGA design for two dimensional Discrete Cosine Transform (2d-dct) used in JPEG medical image compression.

本文介绍了一种适用于J PEG医学图象压缩dctF PG A设计方案。

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