变换编码

一种基于MATLAB的图像变换编码的研究方法

Application of MATLAB in Transform Coding of Image Processing

基于语音信号DCT系数的小波变换编码研究

A Wavelet Transform Coding for Voice 's DCT

一种提高DCT变换编码性能的神经网络方法

A Neural Network Method of Improving DCT Coding Performance

基于MPEG-4的DCT变换编码技术研究

Research on DCT Transformation Coding Technology Based on MPEG-4

此方法可以容易地扩展到WT变换编码。

This approach can be easily extended to the wavelet transform coding technique .

但是在处理运动残差时，DCT变换编码的效率很低。

But the coding efficiency of DCT will be low when it does with the motion residuals .

分析了通过一维DCT快速算法完成二维DCT变换编码的方法；

Analyzes the way implementing 2 dimension DCT transform by algorithm of 1 dimension fast DCT transform ;

该方法结合了小波变换编码与R－C分割方法对热图进行了压缩，并以传热学原理为依据，对其进行内插重建，获得了1024的高压缩比，并得到较好的可视性。

Using a combination of WT transform and image segmentation , the new algorithm is computationally simple , and results in high compression ratio : 1024 for thermal image .

压缩倍数较高的DCT变换编码会引起图像块效应.本文设计了一种可平滑块效应而又能保护图像细节的解码器。

In this paper a decoder is designed to reduce blocking effect of block discrete cosin transform compressed images .

该协议将预测编码、DCT变换编码和熵编码相结合实现对视频数据的压缩，并规定了编码器的总体结构和数据格式。

The H.263 protocol integrates the prediction coding DCT transform coding and entropy coding to realize the compression for video data .

本文在Hopfield神经优化网络模型基础上，设计了一个图象变换编码电路。

This paper presents an electronic circuit , based on Hopfield neural net model , to transform image coding .

H.26L中变换编码和量化的原理与分析

The theory and analysis of transform and quantization in H.26L

本文研究了二代小波在MPEG-4任意形状图象（即VOP）变换编码中的应用。

The application of second generation wavelet in MPEG-4 coding for arbitrarily shaped images is presented .

目前的视频压缩标准多数采用DCT变换编码和运动补偿技术，运动估计约占整个编码时间的60%、运动补偿约占10%。

Most current video compression standards employ DCT transform and motion compensation , which approximately consumes 10 % of encoding time , while motion estimation consumes about 60 % .

非正式主观听力测试表明，本算法在高码率应用优于变换编码（transformcoders），在低码率优于参数编码器（parametriccoders）。

Informal listening results have shown that the STN codec gave a competitive performance to transform coders at high bit rates and outperformed parametric coders at low bit rates .

任意形状图象对象的变换编码方法是MPEG-4视频编码实现的核心技术之一。

Coding of arbitrarily shaped image is one of the core techniques in MPEG 4 video compression . One approach to transform an arbitrarily shaped image region is addressed .

由小波变换编码实现的视频压缩在具备高压缩比的基础上，仍拥有较高的主观视觉效果，避免了由分块DCT变换引起的方块效应。

An advantage of wavelet-based Video compression is that it offers more graceful image degradation at high compression ratios , and it also eliminates the block artifacts seen in DCT compression .

AC-3数字音频压缩中的变换编码算法

Transform Coding Algorithm of AC-3 Digital Audio Compression

本文探讨实验室多媒体教学影像处理的技术&图像压缩方法，并展望未来的图像压缩技术的发展，对应用广泛的DCT变换编码方案作了较详细的研究。

The method of image compression is the key technique in lab 's multimedia teaching . DCT coding was researched in detail . Development of the future image compression technique was viewed .

最后，本文给出了一个不对称的变换编码方案，使体数据在GPU上渲染时实时地被解压缩。

The result of this work is an asymmetric transform coding scheme that allows very large volumes to be compressed and then decompressed in real-time while rendering on the GPU .

26L中整数变换编码，并且将这种新的变换编码与H.263所使用的8×8点DCT变换编码进行比较分析，得出这种编码的优点，证实其能达到更高效的压缩能力。

In this paper , we analyzed this new transform method comparing to the 8 × 8 DCT transform in H.263 and gave its advantages .

本文主要针对正弦变换编码（SinusoidalTransformCoding，STC）的低码率算法进行研究，并设计了一个编码速率为1.4kb/s的STC编码器。

In this thesis , the research aims at the low bit-rate algorithm of Sinusoidal Transform Coding ( STC ), and then a STC codec with a low bit-rate of 1.4kb/s is designed .

研究了三维小波变换编码方法，分析了运动补偿时域滤波器（MCTF）的性能。

Three-dimension wavelet video coding techniques are studied , and the motion compensation temporal filtering ( MCTF ) is analyzed .

本论文提出的这种方法对于其它采用变换编码或者子带编码方式的多通道音频编码系统，如MPEGAAC、DTS等，同样具有借鉴价值和推广意义。

Furthermore , the method can also be applied for other multi-channel audio codec systems , such as MPEG AAC 、 DTS and so on . value calculation for other model basins .

26L在H.263的基础上，对4×4像素大小的块上进行残差的变换编码，且使用了一种整数变换方法，以达到更好的压缩效果。本文分析了H。

A main difference of H.26L from H.263 is : residual coding is based on 4 × 4 blocks and an integer transform is used .

本文提出的STN算法构筑了连接低码率低音质参数编码器和高码率高音质变换编码（通常由严格抽样的完全重建滤波器组来实现）之间的桥梁。

The STN system is a step towards bridging the gap between low-rate , low fidelity parametric coders and high-rate , high-fidelity transform coders based on critically sampled perfect reconstruction filter banks .

实验结果表明，改进的编码算法在同等的PSNR下，能够有效减少图像小波变换编码后码流的比特数，减少运行时间，提高效率。

Through the experimental results show that the improved encoding algorithm can effectively reduce the code stream of bits which after image wavelet transformed , and the running time in the case of same PSNR .

重点分析了小波变换编码的基本框架，把基于小波分析零树编码算法具体应用到指纹图像压缩处理中，解决了AFIS对图像数据存储和传输的技术难点。

An important work is to analyze the basic frame of wavelet transformation code and to apply wavelet analytical zero trees code into a specific fingerprint image compression processing in AFIS .

DWT变换编码和高档DSP芯片相结合，可以认为是目前最理想的星上压缩方案之一。在此分析了DWT+DSP方案应用于高分辨力遥感图像星上压缩的优势和可行性，并提出了初步构想。

DWT transform and coding combined with DSP chip can be deemed one of ideal ways for RT compression of remote-sensing ( RS ) data of high geographic resolution , It 's superiority and feasibility have been analyzed in this paper by bringing forward a tentative plan .

但是，DCT变换编码要求把整个图像编码信息完全解码之后才能够重构图像，图像压缩码流不具有渐进特性，无法满足现代无线通信对可伸缩码流的要求。

However , in the DCT transform coding , the entire image coded information can be reconstructed after full decoding , and image compression bit stream does not have progressive features . Therefore , it cannot satisfy the scalable bit-stream requirements of modern wireless communications .