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文章旨在提出一种无线网络中基于视频报文的不等差错保护方法。文中根据视频分组的帧类型和GOP位置将其按照重要性分级,得到各重要性等级的分组丢失与视频质量衰减之间的关系,建立基于线性编码的冗余带宽分配模型,研究不同冗余带宽条件下不等差错保护方法性能。仿真实验证明,文章所提出的基于帧类型和GOP位置的视频报文重要性分级的方法是有效的,基于线性编码的不等差错保护方法较之均等差错保护、基于帧类型的不等差错保护方法具有更好的性能。
The article aims to propose a method of unequal error protection based on video message in wireless network. According to the frame types and GOP positions of video packets, the paper classifies them according to their importance, and obtains the relationship between packet loss and video quality attenuation for each importance level. A redundant bandwidth allocation model based on linear coding is established, and different redundancy bandwidths Under the conditions of unequal error protection method performance. The simulation results show that the method proposed in this paper is effective in classifying the importance of video packets based on the frame type and GOP position. Compared with the equal error protection, unequal error protection based on linear coding, The method has better performance.