Firstly, an adaptive segmentation DCT coding method based on edge information measure is developed.
首先提出了基于边缘信息测度的四叉树自适应分块的DCT压缩算法。
Simulation results reveal that it can achieve better performance than conventional DCT coding scheme and SA DCT method in low bit rate coding.
实验结果证明，在低码率下，使用子带dct对任意形状的VOP进行编码的方法优于传统的DCT方法和SA DCT方法。
In RGB color space, coded one of the three color components of a color image using DCT coding, the other two components only asked the minority several effective coefficients.
算法对其中一个分量进行完整dct变换，对其他两个分量只求少数几个非零系数。
It is practical to study image coding technique based on DCT.
因此，研究基于DCT的图像编码技术，有着一定的是实用价值。
Arbitrary shape VOP coding using subband DCT with a new region partitioning method is proposed.
提出了采用子带dct并结合一种区域分割技术对任意形状的VOP进行编码的方法。
We firstly overview the properties of fractal coding in image domain, then we derive the corresponding formula of scaling factor and offset of affine transform in DCT domain.
首先，综述了图像域中分形编码的特性，然后导出在离散余弦变换(简称DCT)域中仿射变换的伸缩因子和偏移量的对应公式。
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)和量化运算的特点，提出了一种新的用于低比特率视频编码的全零块预先判别方法。
Based on 4d matrix DCT (4d-mdct) theory, an efficient stereo video coding method was proposed in this paper.
基于4维矩阵dCT变换理论提出了一种有效的立体视频编码方法。
In this paper, three schemes of multiple-description coding based on DCT are proposed for the case of two descriptions.
就两个描述的情况提出了三种基于离散余弦变换(DCT)的多描述编码方案。
This paper proposes a adaptive region coding method, which is based on distributing characters of DCT coefficients.
提出了一种基于DCT系数分布特征的自适应区域编码方法。
DCT coefficients were quantized through nonlinear scalar quantization and entropy coding.
变换系数采用非均匀标量量化和熵编码。
The DCT was used as the main method of image transform coding for a long time.
图像压缩编码长期以来利用离散余弦变换(DCT)作为变换编码的主要技术。
Fractal Image-compressed is carried out after DWT or DCT to improve coding speed and get higher CR and PSNR, but quality of reconstructed-Image is not satisfactory.
运用小波域及DCT域下的分形压缩图像方法，提高了编码速度，得到较高的压缩比和信噪比，但重构图像质量还存在块状效应。
At last, the adaptive vector quantization coding based on the DCT spectrum main orientation mentioned above is developed.
最后本文探讨了一种将基于结构特征的自适应分块与矢量量化相结合的编码方法。
The image damage by transform coefficients quantization in ID-DCT transform compression coding is analysed on frequency domain and space domain. Some useful results are obtained.
本文对一维DCT变换压缩编码中变换域系数二次量化引起的图象损伤进行了频域和空间域分析，得出了一些有用的结论。
The Method based on the DCT transformation has been the center technology for most of the digital image and video coding standards, since it features on good de-correlation and energy compression.
基于分块dct变换的编码方法，由于具有良好的去相关性和能量压缩特性，已经成为现有大多数图像和视频编码标准的核心技术。
Our algorithm incorporates the CS theory into the traditional DCT based coding method to achieve better compression efficiency.
第二，提出了一种利用压缩采样理论的多描述编码算法。
The basic coding method of JPEG is introduced succinctly in the article, which includes procedures from sampling to coding DCT, to quantification and finally to compression with Huffman coding method.
简要介绍了基本的JPEG的编码方法，即从采样到DCT编码再到量化及最后用霍夫曼编码压缩这一过程。
The experimental results show this method could give better coding efficiency than the traditional DCT image coding.
实验结果表明该方法的编码效率优于离散余弦变换编码。
Absrtact: for its fine performance, DCT transform is widely used in the compression and coding method of image and video data.
摘要：DCT变换以其优良特性被图像和视频的数据压缩编码所广泛采用。
This paper describes the relationship between DCT high frequency coefficients of images and sampling schemes of multiple description coding(MDC).
分析了图像DCT高频系数与不同采样方式的多描述图像编码的关系，得出了二者之间存在相关性的结论。
Since the traditional coding technology for image and video is using of DCT, the blocked and whole DCT technology in frequency domain was used in order to embed watermarking.
由于以前的图像和视频编码标准采用DCT编码，在变换域嵌入水印大多使用分块或整体DCT技术。
An enhanced DCT algorithm with real time characteristics is put forward; and a coding algorithm of high quality is obtained by combining the enhanced DCT and a hybrid filter bank.
提出一个具有实时性能的改进型DCT算法，并将改进型dct与混合滤波器组相结合，给出了一个高质量音频压缩算法。
An enhanced DCT algorithm with real time characteristics is put forward; and a coding algorithm of high quality is obtained by combining the enhanced DCT and a hybrid filter bank.
提出一个具有实时性能的改进型DCT算法，并将改进型dct与混合滤波器组相结合，给出了一个高质量音频压缩算法。
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