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随着嵌入式和多媒体压缩技术的发展,嵌入式终端在高清媒体领域扮演了愈来愈重要的角色.由于高清媒体的高带宽需求,多采用先下载后播放的方式,因此如何将大型多媒体文件通过网络快速传输到嵌入式终端上,成为一种迫切需求.在研究传统传输协议的基础上,立足于对嵌入式系统特点的分析,提出一种适用于嵌入式终端的大型多媒体文件传输协议EMFTP(Embedded Multimedia File Transfer Protocol,嵌入式媒体文件传输协议).该协议采用统一重传的差错恢复策略,并引入了基于带宽探测的改进的DAIMD速率控制算法.实验表明,与传统的UDT和FTP传输协议相比,EMFTP的数据传输速度更快,系统资源消耗更少.
With the development of embedded and multimedia compression technologies, embedded terminals play an increasingly important role in the field of high definition media.High-definition media, due to the high bandwidth requirements, use the method of first download and play, so how to convert large multimedia files It is an urgent need to transmit it quickly to the embedded terminal through the network.On the basis of studying the traditional transmission protocol and based on the analysis of the characteristics of the embedded system, a large-scale multimedia file transfer protocol EMFTP (Embedded Multimedia File Transfer Protocol), which adopts the error recovery strategy of unified retransmission and introduces an improved DAIMD rate control algorithm based on bandwidth detection.Experiments show that, compared with the traditional UDT and FTP transmission Compared with the protocol, EMFTP data transfer faster, less system resources consumption.