视频编码无损传输中帧内多普勒域导频估计算法

Algorithm of Intra Doppler Field Pilot Estimation During Video Coding Lossless Transmission

通过对视频信号的帧内多普勒域导频估计,实现对视频编码无损传输,提高视频图像传输的保真度。传统方法中对视频编码的导频估计算法采用时域亮度均值重叠分块的奇异值分解方法,视频数据进行强制分片和分块重组,视频编码流出现糊分块效应,导致视频纠错效果不好。针对上述问题,提出一种改进的视频编码无损传输中帧内多普勒域导频估计算法。构建视频传输网络结构模型,进行丢包率预测,把实时视频可以看作多幅的彩色图像按一定时间间隔顺序进行刷新显示,使图像数据将其能量的大部分集中于频率域的一个小范围内,采用量化分析方法提取帧内视频压缩特征,进行视频编码无损传输中帧内多普勒域导频估计算法改进。仿真结果表明,该方法计算精度较高,提高了视频通信的图像保真度,降低了视频失真,提高了视频传输质量,具有较好的视频传输纠错性能。展示了优越性和较好的应用价值。

Estimation based on video signal intra Doppler field pilot, realize the lossless transmission of video coding, video image transmission to improve the fidelity of. Method of decomposition algorithm using time domain mean brightness over?lapped block singular value pilot video code to estimate in the traditional method, video data are forced into pieces and block the reorganization, video encoding flow occurs paste block effect, lead to video correction effect is not good. Aiming at the above problems, we proposed an improved video coding lossless intra Doppler field pilot estimation algorithm. Construc?tion of video transmission network structure model of packet loss rate prediction, the real-time video can be seen as the col?or images show according to certain time interval sequential refresh, make the image data will be a small range of most of its energy concentrated in the frequency domain, using quantitative analysis method of frame extraction in video compression characteristics, video coding lossless transmission in frame Doppler field pilot estimation algorithm improvement. The simu?lation results show that the calculation precision of this method is higher, and improve image fidelity video communication, reducing the video distortion, improving the quality of the video transmission, and video transmission has better error cor?rection performance. It shows the superiority and good application value.