视频压缩编码目的就是在比特率受限条件下，尽量使编码失真最小。
Video coding is intended to minimize the distortion subject to a constraint bit rate.
视频压缩编码的主要目标就是在比特率受限条件下，尽量使编码失真最小。
The main target of video compression code is to limit the distortion of code under the condition of restricted rate.
在前者中，通过分析语音编码对LPCC参数的影响，提出了一种基于编码失真的LPCC加权参数。
The weighted LPCC feature based on the distortion of speech coding was explored to reduce the influence under the matched condition.
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.
视频通信中压缩编码技术对数据失真非常敏感，视频数据的任何失真，对视频质量都将产生重要的影响。
Compression Coding technology in the video communication is very sensitive to data distortion. Any distorted video datum will have an important influence on the quality of the videos.
试验结果表明：在保持相近率失真性能的同时，该算法可以有效地降低编码的计算复杂度。
Experi - mental results show that this method can efficiently reduces the computational complexity while keeping similar RD performance.
在低比特率音频感觉编码中，预回声失真更为突出，而对其处理的前提是瞬态信号的有效检测。
In perceptual audio coding with low bit rate application, the pre-echo artifact is more distinct, and the effective detection of transient signals is the precondition.
该文根据信源编码压缩比、信道码率及信道特征对渐进图像传输失真的影响，提出一种基于最小图像失真的动态码率分配策略。
A dynamic rate allocation method is presented which is based on the compression rate of image source coder, channel rate, channel characters and their influence on the distortion of progressive image.
随后，通过拉格朗日优化算法，找到了平衡编码量和失真大小的宏块的最佳编码模式。
Then we calculate the Lagrangian cost to balance the rate and distortion, by which we can find the best encoding mode.
实验证明，基于3维小波变换的3维SPIHT编码算法在对超光谱图像压缩时，表现出了优良的率失真性能。 并且算法复杂度适中，具有嵌入式特性。
The test results show that the 3D SPIHT algorithm based on 3D DWT for hyperspectral images compression is very efficient, the algorithm is embedded and has modest complexity.
在此编码方案当中，根据预先定义的匹配失真阈值，图像可以有选择地利用拼凑块、动态码本及码本库编码。
In this scheme, an input image block can be selectively encoded by the proposed puzzled block, the dynamic codebook or the super-codebook according to the predefined distortion threshold.
同时，该振动过程分析将为处理冲击摆中角编码器失真信号，提供一定的依据。
Furthermore, the analysis of the vibration provides an basis for dealing with the distortion signal of the Angle coder of the pendulum apparatus.
JPEG2000是一种新的静止图像编码国际标准，它提供了诸如基于失真度及分辨率的图像渐进恢复，感兴趣区域编码等新特性。
JPEG2000 is a new international standard for still image coding and provides many new features, such as progressive recovery of image by fidelity or resolution and region of interest (ROI) coding.
复杂度提升主要是由于引入了率失真优化策略遍历所有编码模式。
This mainly because of the introduction of radio distortion optimization strategy and traverse all of the coding modes.
在以上研究的基础上，用C语言实现了基于有效比特位编码模型和率失真优化技术的码率控制算法。
With the research above, a new rate control algorithm is realized by c, which is based on the valid-bit-number coding model and the rate-distortion optimization technique.
低频重要系数采用无失真编码压缩。
The low frequency important coefficients were coded by undistorted compression.
静态误差主要有轴系误差、编码器误差、电视传感器本身存在的时间滞后误差、光学结构中可测量的失真以及大气折射误差等；
Static error mostly includes shafting error, coder error, time-lag error by TV sensor, measure distortion by optics structure and atmosphere refraction error etc.
方块效应是基于块的混合视频编码算法产生的重要特征失真，严重影响了压缩后视频的主观质量。
Blocking artifacts are serious artifacts caused by block-based hybrid video coding, and significantly impair the subjective quality of the compressed video.
该方法基于率失真曲线的精确理论模型，对小波分解后的不同子带提供最优的动态比特分配从而实现了小波系数的自适应量化编码，最后还实现了码率控制。
It provides optimal dynamic bit allocation for sub-bands of DWT and realizes adaptive quantization for wavelet coefficients. At last, it provides exact rate control for the coder.
率失真优化是按照率失真斜率递减的顺序编码系数位，最先编码的位具有最大的率失真斜率，每编码一位都会使失真减少最大。
In rate-distortion optimization coefficients are encoded with a decreasing R-D slope, so the first coding bits are the ones having the steepest R-D slope.
因此如何准确估算出差错环境下从编码器到解码器端的失真度，并由此来决定编码模式就成为率失真优化的关键问题。
Therefore, how to estimate precisely the distortion between the codec in error prone environments in order to choose the coding mode is the key problem of rate-distortion.
本文的第二个贡献是，针对SVC的编码模式选择，我们考察了在具有丢失感知的率失真优化中拉格朗日乘子的选择方法。
In the second contribution, we formulate mode decision of loss-aware rate distortion optimization (LA-RDO) with Lagrange multiplier selection in SVC scenarios.
通过与其他静止图像的压缩标准对比。可以看出实现的VTC编码算法不但有良好的率失真性能，而且具有许多有用的特性。
Comparison with other compression standard for still image shows that the VTC has better rate distortion performance and many attractive useful characteristic.
与步进频率信号在高速目标下成像失真相比，相位编码步进频率信号的多普勒性能有很明显改善。
Compared with the range profile distortion produced by SF signal in the presence of high moving targets, PCSF signal Doppler performance is obviously improved.
在给定的编码率的条件下，用率失真算法计算图像编码使之达到最小的失真。
Under the given distortion conditions, the still image coding Rate-Distortion theories discuss the max coding bit-rate.
该方案可以充分利用所分配的有限计算资源优化编码率失真性能。
The solution can fully use the limited computing resources to achieve optimal rate-distortion performance.
结果表明，该方法在不影响图像失真度和码率性能的前提下，降低了编码时间，减小了编码复杂度；
Experimental results show that the proposed algorithm can reduce the coding time and encoder complexity while maintaining similar PSNR and bite rate ;
结果表明，该方法在不影响图像失真度和码率性能的前提下，降低了编码时间，减小了编码复杂度；
Experimental results show that the proposed algorithm can reduce the coding time and encoder complexity while maintaining similar PSNR and bite rate ;
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