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target bits
相关语句
  目标比特数
     The test result shows that we can achieve better control of the bits of I frame and the estimation the complixity and the target bits of the P frame.
     测试结果表明,这些改进实现了对I帧的比特数的更好的控制,能够更好地预测P帧复杂度以及目标比特数
短句来源
     A new Forward Rate Control(FRC) strategy based on the rate distortion theory is proposed in this paper, which allocates the target bits for each macroblock according to the local spatial activity as well as the bit rate, so that an optimum bit allocation method can be achieved.
     本文以率失真理论为基础,提出了一种新的前向视频编码码率控制策略FRC(ForwardRateControl),其核心思想是:宏块(Macroblock)目标比特数的预分配除受码率的限制外,更重要的是受到图像的局部空间活动性等因素的控制,从而达到一种最优的比特分配方案。
短句来源
     This paper investigates the problems of MPEG-2 video streams seamless splicing. Through the adjustment of the vbv_delay to confirmthe target bits of the splicing section, and with the coding complexity changed for the frame conversion, it proposes an efficient rate control strategy.
     对压缩域中MPEG-2视频流无缝拼接的码率控制进行了研究,分析了通过调整编码参数vbv_delay来确定拼接期的目标比特数,以达到缓冲器平稳过渡的要求,同时结合压缩域中MPEG-2视频流无缝拼接中的帧转换所带来的编码复杂度变化的特点,提出了一种具体的拼接期的目标比特数分配的方案。
短句来源
     In this paper,we first point out the bad effect when the difference between target bits and actual bits is too big,which is not been paid much attention in JM module and other research,then we present a improvement for the prediction of the mad,so that we can strong the accurate of the R-Q module,and so is the prediction of the QP. At last,we prove its rationality through the experiment.
     该文针对jm模型以及以往研究中,目标比特数的分配和实际比特数存在差值较大的缺点,分析了其不良影响,并提出了对mad预测的改进措施,以此来提高R-Q模型的准确性,从而提高QP预测的精确度,并通过实验结果证明其的合理性。
短句来源
  “target bits”译为未确定词的双语例句
     Through analysis of the rate control in H.264,a peak signal noise ratiobased(PSNR-based) complexity estimation method is proposed. The mean absolute difference-based(MAD-based) complexity estimation is adopted to predict the basic unit complexity,so that more accurate target bits allocation is achieved.
     通过对H. 264码率控制原理的分析,提出一种基于峰值信噪比(peak signal noise ratio,PSNR)的图像复杂度估计方法,与平均绝对差值(mean absolute difference,MAD)联合估计基本单元编码复杂度,使基本单元目标比特分配更精确。
短句来源
     The proposed method can allocate the target bits and control the rate more accurately,and compared with JM9.6,reduce the PSNR fluctuations significantly and improve the average PSNR by 0.2 dB.
     所提方法在精确分配目标比特和控制码率的同时,与JM9.6相比,可以令PSNR更为平滑,且平均性能提高0.2 dB。
短句来源
     Considering the shortages of VM8 and zero coefficient percentage algorithms, two improved rate controlling algorithms are presented. For the old VM8 algorithm, the target bits are allocated according the buffer and the remainder bits of this GOP.
     本文首先研究和分析了视频编码国际标准的发展和其采用的各种码率控制算法,深入探讨了几种主要码率控制算法的优点和不足,然后详细研究了MPEG-4测试模型所采用的基于二阶率模型的码率控制算法VM8和基于零系数百分比的ρ域码率控制算法,针对原算法的不足,提出了两种改进的码率控制算法,获得了更好的效果。
短句来源
     When allocating the target bits for the encoding frame, the Zero Coefficient percentage is a good factor and is more effective than Mean Absolute Difference.
     该算法抛弃传统平均绝对差值的度量方式,将零系数百分比作为图像复杂度的一个度量因子,为待编码帧进行目标码率的分配。
短句来源
     The QP (Quantization Parameter) of each macroblock is calculated in macroblock-layer, the target bits of each frame is allocated in frame-layer.
     帧层次主要计算为这一帧分配的目标字节数,宏块层次主要计算每一个宏块的量化参数。
短句来源
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  相似匹配句对
     N TARGET
     命中目标
短句来源
     principle and target;
     原则和目标;
短句来源
     On the Security of RSA Bits
     RSA的比特安全性
短句来源
     Electroplated Masonry Bits
     电镀薄壁金刚石工程钻头
短句来源
     The target of drilling bits is deduced for high-gas coalbed,the influence of gas and damage of coal mass is considered in this paper.
     考虑瓦斯的影响和煤体损伤特性,经理论推导得到了含瓦斯煤层检测冲击地压的钻屑量指标,并结合阜新五龙矿的实际情况进行了验证。
短句来源
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  target bits
In the macroblock layer, it utilizes the predictive and adaptive perceptual techniques in the regulation of the quantization scale to allocate the target bits.
      
The target-bits for Pand B-pictures can be computed in a similar fashion.
      
The larger the weight is, the more target bits should be allocated to the corresponding region.
      
For example, if W is larger than 10% of the maximum buffer size, the frame target bits Bi is slightly decreased.
      


A new Forward Rate Control(FRC) strategy based on the rate distortion theory is proposed in this paper, which allocates the target bits for each macroblock according to the local spatial activity as well as the bit rate, so that an optimum bit allocation method can be achieved. The result of subjective tests shows that the proposed rate control strategy improves the quality of the reconstructed pictures considerably over the conventional strategy.

本文以率失真理论为基础,提出了一种新的前向视频编码码率控制策略FRC(ForwardRateControl),其核心思想是:宏块(Macroblock)目标比特数的预分配除受码率的限制外,更重要的是受到图像的局部空间活动性等因素的控制,从而达到一种最优的比特分配方案。主观测试实验结果表明,这种新的码率控制策略大大地改善了重建图像的质量

In this paper, based on MPEG 2 Test Model 5 (TM5) bit rate control algorithm, there are some improvements proposed: ① an intelligent integral action is proposed for improving the control precision of bit rate; ② after using DCT AC coefficients to define the measure of macroblock and picture coding difficulty, an improvement on target bits allocation is proposed for the decoded picture quality and conformance including scene change, which can adjust the target bits allocation adaptively by their measure....

In this paper, based on MPEG 2 Test Model 5 (TM5) bit rate control algorithm, there are some improvements proposed: ① an intelligent integral action is proposed for improving the control precision of bit rate; ② after using DCT AC coefficients to define the measure of macroblock and picture coding difficulty, an improvement on target bits allocation is proposed for the decoded picture quality and conformance including scene change, which can adjust the target bits allocation adaptively by their measure. Simulation results show that it can achieve high control precision by using intelligent integral action, its relative error is reduced one order of magnitude compared with TM5; using the improvement on target bits allocation, the average decoding PSNR is increased visibly, and the decoded picture quality is improved when scene changes.

针对MPEG-2测试模型5(TM5)比特速率控制算法进行了以下改进:①引入一种智能积分作用,有利于提高比特速率的控制精度;②采用DCT交流系数定义宏块和图象的编码难度测度,然后提出了改进的目标编码量分配策略,即根据编码难度测度自适应调整图象和宏块的目标编码量,有利于提高包括场景变化在内的图象解码质量及其一致性.模拟实验结果表明:采用智能积分作用能达到很高的控制精度,与TM5相比,相对误差降低了约一个数量级;采用目标编码量的改进分配策略,平均峰值信噪比(PSNR)有明显提高,而且也能改善由于场景切换所带来的对图象解码质量的影响

By studying the MPEG 2 based output rate control strategy in detail, the mechanism of accurate bit rate control and rational bit allocation is analyzed. The simulation results show that the difference between actually picture coded bits and picture target bits can be minimized by monitoring the “virtual buffer” state to adjust the quantization scaling factor, and thus more stable picture quality can be achieved at a fixed rate. Considering the decrease in human eye's sensibility after a scene change,...

By studying the MPEG 2 based output rate control strategy in detail, the mechanism of accurate bit rate control and rational bit allocation is analyzed. The simulation results show that the difference between actually picture coded bits and picture target bits can be minimized by monitoring the “virtual buffer” state to adjust the quantization scaling factor, and thus more stable picture quality can be achieved at a fixed rate. Considering the decrease in human eye's sensibility after a scene change, a bit rate control strategy under scene change is proposed, in which the basic ideas are to decrease the scene change picture quality and to keep a regular bit allocation. Thus, after the scene change, the follow up pictures qualities can be restored rapidly and the picture quality of the next GOP can not be influenced especially. The experiments show that the proposed rate control strategy can solve the problem of bit rate control from the drastic changes of coded bits under scene change efficiently.

通过研究输出缓存器码率控制策略,分析了码率控制策略能精确地控制码率及合理地分配码字的机制.结果表明,码率控制通过监视“虚拟缓存器”状态调节量化尺度因子,能保持实际帧编码比特数与预分配帧编码比特数一致,从而在恒定码率下,获得均匀的图象质量.针对场景切换所带来的影响,根据人眼对场景切换时图象质量降质不敏感的特性,提出了一改进的码率控制策略,原则是保持正常的码字分配,而降低切换帧的图象质量,从而使得后续帧能较快地恢复图象的正常质量,特别是不影响下一个GOP编码.结果表明,所提出的码率控制策略能够有效地解决场景切换引起编码比特数可能的剧烈变化所带来的困难.

 
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