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首页> 外文期刊>Journal of visual communication & image representation >Video transmission using advanced partial backward decodable bit stream (APBDBS)
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Video transmission using advanced partial backward decodable bit stream (APBDBS)

机译：使用高级部分后向可解码比特流（APBDBS）的视频传输

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摘要

An analysis on the error robustness of partial backward decodable bit stream (PBDBS) presented by Gao and Tu shows that bits at both ends of video packets are safer than those in the middle when the PBDBS is used. According to this, a new structure of video packet called advanced partial backward decodable bit stream (APBDBS) is proposed in this paper. First, different types of syntax elements in video packets are reordered according to their syntactical importance. The more important (such as motion vectors) are placed at both ends of video packets, while the less important in the middle. Second, MBs in video packets are reordered according to their spatial importance. MBs near to the centers of images are placed close to both ends of video packets while marginal MBs are placed in the middle. The simulation shows that with the APBDBS used, up to 2 dB luminance peak signal noise ratio (PSNR) improvement can be found compared with the PBDBS.
机译：由Gao和Tu提出的对部分后向可解码比特流（PBDBS）的错误鲁棒性分析表明，使用PBDBS时，视频数据包两端的比特比中间的比特更安全。据此，本文提出了一种新的视频包结构，称为高级部分后向可解码比特流（APBDBS）。首先，根据视频数据包的语法重要性对视频数据包中不同类型的语法元素进行重新排序。越重要（例如运动矢量）放在视频数据包的两端，而越不重要在中间。其次，视频数据包中的MB根据其空间重要性进行重新排序。靠近图像中心的MB放置在视频数据包的两端附近，而边缘MB放置在中间。仿真表明，与PBDBS相比，使用APBDBS可以提高2 dB的亮度峰值信号噪声比（PSNR）。

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