编码率

两种编码率为5/6的网格编码调制方法

Two Different Methods for Coding Rate 5 / 6 Trellis-Coded Modulation

然后对预测误差进行量化，以进一步降低编码率。

Then prediction errors were quantized properly to reduce coding rate further .

但Reed-Muller码比极长码的编码率高，故Reed-Muller码是优于极长码的。

However , the rate of Reed-Muller code is higher than that of Maximun Length code , so Reed-Muller code is better than Maximum Length code .

WT-TCQ算法利用TCQ算法复杂性中等而性能与矢量量化相当的优点，可以获得更高的压缩信噪比，编码率较大时，压缩算法的性能优势更明显。

WT-TCQ uses TCQ to quantize wavelet coefficients and gains better compression performance . The advantages of this algorithm are more obvious at large rate .

一种时域质量稳定的三维小波视频编码率控制技术

Rate Control for 3D Embedded Wavelet Video Coder Capable of Smoothing Temporal Distortion

语音编码器可以通过在可变编码率编码数字信号进一步加强。

Voice encoders may be further enhanced by encoding digital signals at variable encoding rates .

目前人们对信道中传输的语音质量、编码率要求日益增加，同时对语音实时传输的需求愈发强烈。

At present , the speech quality in transmission of the channels and the coding rate isan increasing demand .

在给定的编码率下，可由率失真算法计算图像编码所能达到的最大的编码失真减小。

Unde the given coding bit-rate , the max coding distortion decrease can be calculated v / ith Rate-Distortion algorithms .

如何使用尽可能少的编码率来实现尽可能好的话音质量成为语音压缩编码研究的主要目标之一。

And one of the main goals of nowadays speech compression coding research is how to achieve best speech quality by least bit rate .

为此，在对目前的播出系统进行讨论的基础上，提出一种加大编码器的编码率，从而提高数字电视图像质量的方法。

Therefore , on the basis of current broadcasting system , a new method for increasing the encoding bandwith of encoders is discussed and put forward to improve the digital television picture quality .

这类算法适合实时性和数据可操作性要求高、安全性要求低的应用。（4）对已有的可感知加密方法进行改进，使得改进后的算法支持直接进行编码率控制操作。

These properties make them suitable for some applications with low security , real-time operation and direct operation requirements . Fourthly , an improved perceptual cryptography is presented , which supports direct bit-rate control .

在对视频帧中前景区域和背景区域的编码率失真特性分析的基础上，提出了一种应用于宏块层的基于区域的码率控制方法。

Based on the analyses of the R-D properties of the foreground region and the background region of a video frame , a region-based rate control approach is developed and implemented in the macroblock ( MB ) layer .

当方块采用4×4象素时，其码长是固定不变的，而且平均编码率为2.06比特/象素，接近普通方块编码的编码率2比特/象素。

When the block size is 4 × 4 pixels , the code length is fixed . The average bit-rate is 2.06 bit / pixel , which approaches to , 2 bit / pixel , the bit-rate , of block truncation coding .

T2编码器由已编码比特率自适应地反馈控制编码深度，完成优化截取。

T2 encoder sends feedback to control the coding depth by the accumulated bit rate and complete the rate-distortion optimization truncation .

实验结果表明，在相同的编码比特率下，重构图像质量要优于传统的JPEG压缩算法。

The experiment results show that the proposed algorithm in this paper is better than the traditional JPEG compression algorithm at the same bit rate .

该算法从尽量降低编码比特率的角度出发，在ZigZag扫描顺序的最后一个量化系数中嵌入水印信息。

Considered to decrease the bit rate , the secret bits were inserted by altering the last quantized AC coefficient in Zigzag scan order .

针对JPEG-LS算法的编码比特率特性提出了一套编码比特率控制算法，通过此算法可实现固定比特率的码流传送。

This paper introduced an algorithm which can achieve a constant bit rate when encoding video with JPEG LS standard .

如果将contourlet变换直接应用于图像压缩，在一定的失真度下，编码比特率很可能会增加。

If it is applied to image compression straightforwardly , the encoding bit-rate may increase to meet a given distortion .

该文在原分块自适应矢量量化（BAVQ）算法基础上，提出了一种通过改变矢量码书大小及矢量维数来获得可变的编码数据率的改进措施。

In this paper , based on the theory of the Block Adaptive Vector Quantization ( BAVQ ) algorithm , a variable-rate algorithm is proposed .

通过实验发现在图像峰值信噪比（PSNR）和编码比特率基本不变的情况下，编码时间降低到了原来的1/6~1/3，从而达到了降低计算复杂度和提高编码效率的目的。

Experimental results demonstrate that this algorithm reduces the encoding time to 1 / 6 ~ 1 / 3 of the original mode decision with nearly the same PSNR and encoding bitrate . The aim to reduce the computing complexity and increase the encoding efficiency is achieved .

实验结果表明，在很大的压缩范围内，在不同的压缩比和编码比特率下，重建图像的峰值信噪比都在30dB以上，仍然能满足人们的视觉需要。

Simulation experiments show that the reconstructed images are of good quality satisfying people 's visual requirement with PSNR above 30 dB under the circumstances of very large compression range at various compression ratio and bit rate .

视频编码比特率和重建图像显示的清晰度

Video coding bit-rate and the display definition of reconstructed picture

这些方法有效地降低了编码位率。

All of these reduce efficiently the coding bit rate .

基于可伸缩视频编码的率失真优化编码算法

Adaptive RD-optimal coding algorithm for scalable video coding

提出了一种用模糊逻辑算法实时控制图像编码比特率的方法。

Study on control system of spot welding constant current based on fuzzy logic arithmetic ;

实验证明该方法能够有效提高帧内同步视频的编码压缩率。

Experimental results show that the proposed method can compress the intra-frame synchronized video efficiently .

在这儿脑子里形成的度量是单元测试的编码覆盖率。

One metric that comes to mind here is the code-coverage percentage of the unit tests .

基于变换的视频编码与率失真分析

Transform-Based Video Coding and Rate-Distortion Analysis

视频编码位率控制技术

Video Coding Rate Control Technology

分层多描述编码的率失真

Rate-Distortion of Scalable Multiple Description