rate-distortion coding

An Improved JPEG Algorithm at Low Bit Rate for Image Coding

一种低比特率JPEG编码图像质量改进算法

Over the years, it has been the goal that compressing the transmission bandwidth of speech signal or reducing the transmission rate of telephone channel. In achieving this target, speech compression coding technology plays an important role.

多年来，人们一直追求的目标就是压缩语音信号的传输带宽或降低电话信道的传输码率，而在实现这一目标中，语音压缩编码技术发挥着重要作用。

The synthesize speech which is put out come by low bits rate wideband coding can reach MOS 3.5 by audition test. That indicate the quality of synthesize speech can achieve scheduled request.

经过两种低速率的宽带语音编码输出的广西大学硕士研究生学位论文合成语音，通过听力测试MOS可达到3.5左右，表明合成语音的质量达到预定的要求。

The project compresses the segmented human being and background in term of different compression rate with texture coding technology of arbitrary shape object.

利用任意形状对象纹理编码技术，对分割出来的人体和背景部分按照不同的压缩比进行压缩。

Wireless Videophone Compressing Coding Approach Research at Low Bit-rate

低比特率无线可视电话压缩编码方法研究

On a comprehensive consideration of the coding-rate and complexity of hardware implementation of Turbo decoder, a high coding-rate parallel Turbo decode algorithm is designed and a controller structure applicable to different decoding algorithms is presented.

在综合考虑了Turbo译码效率和硬件实现的复杂度的基础上，设计了一种高效的并行Turbo译码算法，并且给出了一种设计较为简单，适用于不同并行译码算法的控制器结构。

Trellis-Coded Modulation ( TCM) is an advanced combined coding and modulation technique evolved in recent years. In TCM, significant coding gains can be obtained without bandwidth expansion or reduction of transmission rate.

网格编码调制（TCM）是近年来提出的一种先进的组合编码调制技术，在不降低信息传输率、不扩展占用频带的前提下，它能获得可观的编码增益。

Space time coding is a channel coding scheme for MIMO system, which combines the merits of the spatial-diversity and time-diversity. It provides both diversity gain and coding gain, which can provide much higher data rate-to-bandwidth ratio than single-antenna system.

空时编码是适合于多天线阵信道的一种编码方案，它综合了空间分集和时间分集的优点，同时提供分集增益和编码增益，能够获得远远高于传统单天线系统的频谱利用率。

Whether the rate coding or temporal coding, each coding theory has some shortcomings in explaining the mechanism of rapid and precise neural responses.

无论是发放率编码理论还是时间编码理论，两者在快速、精细的神经生理现象解释上，均存在着不足之处。

In this thesis, for the sake of improve the compression rate, we exert MMX technique and implement the coding optimizing and saved a lot time, also improved compression coding rate.

本文中，为了提高压缩的速率，本文运用了MMX技术，实施了编码的优化，节约了大量的压缩时间，进一步提高了编码速度。