【摘要】 串口软件升级是一种直接升级方式,是较在线升级规模更小且针对性更强的一种升级方式。介绍了地面数字电视机顶盒串口软件升级的实现。首先分析了在DMT-TH地面数字电视发展趋势下,软件升级的必要性,阐述了升级原理;针对无线信道中在线升级稳定性和安全性上的不足,提出了使机顶盒兼具串口升级和在线升级功能;最后,介绍了串口升级的实现方式和升级流程,并分别对服务端和客户端两个部分给予说明。更多还原

【Abstract】 Compared with online upgrade,the serial port software upgrade,one of the direct modes of upgrade,is a smaller-scale and more pertinence mode.This paper introduces the implementation of serial port software upgrade for terrestrial mobile digital TV STB.Firstly,we analyze the necessity of software upgrade in the background of DMB-TH development and expound the upgrading principle.Due to lack of stability and security in wireless channel,we propose that the STB should have both functions of serial port software upgrade and online upgrade.Finally,we present the realization of serial port software upgrade and its upgrading process,and explain the server port and client port respectively.更多还原