失真函数

这种广义的率失真函数综合反映了视频信源经信源编码，信道编码，差错隐藏后的率失真特性，因此可以用来进行视频通信系统收发端的联合优化。

Specifically , a generalized rate distortion function , which reflects the distortion rate due to source coding , channel coding , and error concealment , is established for optimal bits allocation , resulting an effective transmission of video data .

在综合考虑了由于量化噪声和信道噪声引起的失真等因素后，建立了一个端到端的率失真函数。

An end-to-end rate distortion function was established considering the distortion caused by quantization and channel noise .

率失真函数R（D）的计算问题一直是一个比较复杂的难题，传统的计算方法是利用参量表达式计算，计算过程十分复杂。

The calculating problem of R ( D ) has always been a relatively complicated one . The traditional calculating method , which uses parameter , is very complex .

由此对比理想功放的增益即得到离散的预失真函数，将其存储在LUT表中。

Then the predistortion function in discrete form is generated by contract with the ideal amplifier gain , which can be stored in LUT .

给出利用Fano不等式和率失真函数的性质来计算n元等概信源和汉明失真函数的率失真函数即R（D）的新方法，该方法避开了复杂的计算，简化了大量的推导过程。

This paper illustrates a new way of calculating R ( D ) by using Fano inequality and the nature of R ( D ) . This method will avoid complicated calculations and simplify the process of mass deduction .

本文在压缩域或DCT域建立了一种失真函数模型，它能够对编码复杂度提供更加精确和可靠的预测。

These source models either have high computational complexity or subject to relatively large estimation evaluation and control error . In this dissertation , a R-D analysis in DCT domain or compressed domain is developed , which can provide more accurate prediction for target bit allocation .

论文总结了FGS率失真函数的观察特性，提出了快速码率分配的解决方案，该方案在保证视频质量平滑性的同时，能够大大提高码率分配的效率，满足实时性的需求。

An observation characteristic of FGS Rate-Distortion ( R-D ) relation is proposed and discussed . Then a fast rate allocation scheme is presented , which largely enhances the efficiency of rate allocation and smoothes the video quality at the same time .

信道容量和率失真函数的矩阵方法

The Matrix Method for Channel Capacity and Information Rate-distortion Function

离散信源率失真函数的计算方法

The Calculating Method of Discrete Source of the Distortion - Rate Function

本文在速率失真函数的基础上，提出了适合精细可分级编码视频流的最优的速率分配方法。

An optimal rate allocation method for fine granularity scalable video streaming based on rate-distortion function was presented .

在此基础上，我们提出了单帧率失真函数的修正算法。

Based on the linear model , we proposed a method to modify the rate-distortion function of each frame .

我们将修正后的率失真函数应用于码率分配，提高了整体的编码性能。

With these modified functions , it is easy to achieve optimal bit allocation to improve the encoding performance .

本文用矩阵的方法对远动信道容量和率失真函数试行了分析和数值计算。

In this paper , channel capacity and information rate-distortion-function of telecontrol are analysed and calculated by means of the matrix method .

同时，给出了一种资源分配方案通过率失真函数使媒体速率适应估计的网络带宽。

Meanwhile the paper , presents a resource allocation scheme to adapt media rate to the estimated network bandwidth using rate-distortion function .

最后，导出了反映矢量量化器工作特性和率失真函数之间的数量关系的不等式串。

Finally , a series of inequalities is derived , which gives a quantitative relation between the performance of a vector quantizer and rate-distortion function .

为此，首先建立增强层的速率失真函数，然后使用拉格朗日乘子方法来求解这个条件最优问题的解。

To solve this problem , the rate-distortion function of the enhancement layer was first established and the Lagrange multiple method was used to get the optimal solution of the constrained optimization problem .

对于无限大图像I定义了一个失真率函数d（R/I）.它是在有限状态编码译码意义下和给定信息率R时渐近可达的失真下限。

For every individual images I we define a distortion-rate function d ( R / I ) which is shown to be an asymptotically attainable lower bound on the distortion that can be achieved for I by any finite-state encoder operating at a fixed output rate R.

这样，实际中只需研究特定编码量化模式下GGD失真速率函数的导数与GGD形状参数的关系和规律，就可以重建相应编码模式下的失真速率函数。

So if we gain the relation between the the derivative of GGD distortion-rate function and the GGD shape parameter , then we can reconstruct the rate-distortion function .

■距离及随机场的失真率函数

■ Distance and Distortion - Rate Function of Random Fields

这种算法考虑了信源在量化器量化判决区域的分布，通过寻找最小的拉格朗日率失真费用函数，获得量化器的判决电平。

The source distribution in decision region of quantizer is considered in this algorithm , and the decision level of quantizer is derived from the procedure of searching the minimum R D Lagrangian cost .

利用前向神经网络，包括多层感知器和径向基函数网络，对多维非线性函数的逼近原理，使得谱失真测度函数具备了表现人耳听觉系统的主观感知行为的能力。

It provide the MSD with the capability of employing subjective behavior of perception of human 's auditory system , by using the theory of approaching to nonlinear function of multilayer perceptrons ( MLP ) and radial basis function networks ( RBFN ) .

强震记录仪器响应失真校正的权函数方法&时域离散序列数值分析方法与应用研究之二

A weighting function method for correction to instrument response distortion of digital strong motion accelerograms

然后利用二次多项式模型拟合文本行的中心线，并建立径向失真校正的目标函数。

Then , it used second order polynomial to fit the central line of text line , and constructed the object function of lens distortion .

本文通过大量的实验数据分析，提出变换比的概念，并以变换比为参数，建立了一种新的率失真模型，其中码率函数和失真函数都是关于变换比参数的函数。

Plenty of experiment datas are analyzed , and the concept of transform-rate is presented in this dissertation . Based on the concept of transform-rate , we present a new rate-distortion model in which rate and distorted functions are about the functions of transform-rate parameter .

在传统R-D模型中，码率R和失真D都看成量化步长的函数，而且失真评价函数一般在象素域或空域中进行。

In conventional R-D analysis , the bitrate R and distortion D are considered as function of quantization parameter q , which are usually developed in pixel-domain or spatial domain .

当预失真器开始工作时，输入的基带数字信号与LUT表中的离散预失真函数作复乘，即完成了预失真处理。

When the predistorter works , the input baseband signals multiply with the discrete predistortion function , accomplish the predistortion .