discrete cosine transform

In the flowing, an iterative channel estimation method using discrete cosine transform is proposed.

在此基础上, 利用离散余弦变换的特性,提出了一种基于DCT变换 的迭代信道估计算法.

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This paper presents an information hiding algorithm in Discrete Cosine Transform ( DCT ) domain.

提出一种在图像离散余弦变换 ( DCT ) 域内的信息隐藏算法.

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Up to now, some mature technologies have been developed in the area of image compression, such as DCT ( Discrete Cosine Transform) and Huffman Code.

到目前为止，图像压缩的研究己经产生了一些成熟的技术，如DCT变换，霍夫曼编码等。

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This procedure realize orthogonal transformation images, including Fourier transform, discrete cosine transform, Walsh transform.

本程序实现图像的正交变换, 包括傅立叶变换, 离散余弦变换, 沃尔什变换.

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The source code simulates BER of OFDM system implemented using discrete cosine transform.

源代码模拟误码率的OFDM系统实施使用离散余弦变换.

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The block-Based Discrete Cosine Transform ( BDCT) suffers from visible blocking artifacts between adjacent image blocks at low bit rates, which reduces the image visual quality.

块离散余弦变换在低比特率时其恢复图像的块边界上会出现明显可见的方块效应，从而降低了图像的视觉质量。

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Speech signal compression schemes based on discrete cosine transform

利用离散余弦变换的语音信号压缩方案

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Theblock-based discrete cosine transform ( DCT ) is a fundamental component of manyinternational image and video compression standards.

基于离散余弦变换 ( DCT ) 的压缩技术是目前大多数国际图像视频压缩编码标准中采用的一种压缩技术.

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A Hybrid Image Watermarking Based on Wavelet Decomposition and Discrete Cosine Transform

一种小波分解和离散余弦变换混合图像水印算法

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A new face representation algorithm based on discrete cosine transform

一种新的基于DCT变换的人脸表征

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The reason that Block Discrete Cosine Transform ( BDCT) brings blocking artifacts is analyzed in this paper. An efficiently adaptive de-blocking algorithm is proposed based on maximum a posteriori estimation of Markov Random Field ( MRF-MAP) Frame.

分析了块离散余弦变换（BDCT）图像编码的块效应产生原因，基于马尔可夫随机场最大后验估计（MRF-MAP）框架提出了一种有效的自适应去块效应算法。

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Watermarking Technology Based on Watson Model and Discrete Cosine Transform

基于Watson模型的DCT域数字水印技术

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Research and Hardware Design of Discrete Cosine Transform

离散余弦变换的研究与硬件设计

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The Discrete Cosine Transform and Application Based on MATLAB

基于MATLAB的离散余弦变换与应用

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The Realization of Two-Dimensional Discrete Cosine Transform Based on GPU Calculation Platform

基于GPU平台的二维离散余弦算法

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Local Discrete Cosine Transform to Interference Suppression in Spread Spectrum Communications

扩频通信抗干扰中的局部离散余弦变换技术

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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图像的离散余弦变换（DCT）系数直方图差值序列，提出一种新的检测JPEG MB2隐写术的方法。

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This paper describes a FPGA design Discrete Cosine Transform ( 2 D-DCT ) used in JPEG medical image compression.

本文介绍了一种适用于JPEG医学图象压缩的二维 DCT 的FPGA设计方案.

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This paper presents a new Loeffler algorithm-based approach to two dimensional forward and Inverse Discrete Cosine Transform ( 2D DCT/ IDCT) for image compressions.

提出了一种基于Loeffler[8]算法的快速实现二维离散余弦变换/反离散余弦变换（2D DCT/IDCT）的方法。

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The algorithm embeds the watermark information into the transform domain of original carrier after discrete wavelet and discrete cosine transform.

该算法将水印信息嵌入载体图像经过小波与离散余弦变换后的频域系数中。

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Digital Image Compression Technology Based on Discrete Cosine Transform and Realization Based on Matlab

基于DCT变换的数字图像压缩技术及其Matlab实现

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The block-based discrete cosine transform ( BDCT) is widely used by the standards of image and video compression for its high compression rate and low computational cost.

基于块的离散余弦变换（BDCT）具有压缩率高、计算复杂度低、易于实现等优点，因而被广泛应用在图像和视频压缩标准中。

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Four kinds of discrete transform principal component regression methods were established by combining wavelet packet transform, wavelet transform, Fourier transform and discrete cosine transform with principal component regression. Calculating programs were designed to perform the calculation by discrete transform principal component regression methods.

将离散小波变换、小波包变换、傅里叶变换和离散余弦变换与主组分回归方法结合构成4种离散变换主组分回归方法，编制了离散变换主组分回归方法的计算程序。

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At low bit rates, the Block Discrete Cosine Transform ( BDCT) compression methods often give rise to blocking artifacts.

低比特率时，基于块离散余弦变换（BDCT）的图像压缩方法常常会引起块效应。

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The matched filtering method based on discrete cosine transform can improve accuracy and reliability of dividing gravitational and magnetic anomaly.

本文提出的基于离散余弦变换的匹配滤波方法，可以提高重磁异常划分的精确性和可靠性。

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Discrete Cosine Transform and image compression.

离散馀弦转换与影像压缩法.

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Inverse discrete cosine transform ( IDCT) is an important module in MPEG ( Moving Picture Expert Group) decoding.

离散余弦逆变换IDCT是运动图像专家组MPEG视频解码的重要组成部分。

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This paper abstracts a stream execution model of GPU, describes its stream execution process, and implements the discrete cosine transform on GPU.

该文抽象出图形处理器的流执行模型，描述图形处理器流处理机制的执行过程，在图形处理器上实现了二维离散余弦变换。

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Among kinds of video coding methods, discrete cosine transform ( DCT) based on the block is the core of most international image coding standards.

在当前的视频编码国际标准中，大部分都使用了基于块的离散余弦变换（DCT变换）编码技术。

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In order to reduce the visible blocking artifacts at the block boundary with Block Discrete Cosine Transform ( BDCT) at low bit rates, a new blocking-artifact reduction algorithm in DCT domain is presented in this paper.

为了减少低比特率时块离散余弦变换（BDCT）在块边界所出现的明显可见的方块效应，提出了一种新的DCT域的去块效应消除算法。

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