...
首页> 外文期刊>Systems Journal, IEEE >Accurate Bitrate Model and Greedy-Based Rate Controller for Low Delay Video Transmission
【24h】

Accurate Bitrate Model and Greedy-Based Rate Controller for Low Delay Video Transmission

机译:低延迟视频传输的精确比特率模型和基于贪婪的速率控制器

获取原文
获取原文并翻译 | 示例
           

摘要

We develop a $q$ -domain characteristic-based rate model for video transmission. Specifically, we extract three characteristics from the quantized discrete cosine transform spectra to construct an accurate rate-quantization (R-Q) model. Moreover, the extraction of the proposed characteristics requires only simple additive operations (additions, subtractions, and comparisons) and few multiplications. Based on the $q$-domain characteristic-based bitrate model, we develop an efficient two-level greedy-based rate controller for low delay video transmission. Extensive experimental results show that due to the efficiency and accurate estimation of both macroblock and frame-level R-Q models, the proposed rate controller better maintains the source bitrate to meet a predefined buffer delay time, and substantially enhances visual quality as compared with other rate controllers.
机译:我们为视频传输开发了基于$ q $域特征的费率模型。具体来说,我们从量化的离散余弦变换谱中提取三个特征,以构建精确的速率量化(R-Q)模型。此外,提出的特征的提取仅需要简单的加法运算(加法,减法和比较),而很少需要乘法运算。基于基于$ q $域的基于特征的比特率模型,我们开发了一种高效的基于两级贪婪的速率控制器,用于低延迟视频传输。大量的实验结果表明,由于宏块和帧级RQ模型的高效和准确估计,与其他速率控制器相比,所提出的速率控制器可以更好地保持源比特率以满足预定的缓冲延迟时间,并显着提高视觉质量。 。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号