嵌入式机顶盒改进Loader系统的设计与实现  

Design and implementation of embedded set top box's improved loader system

作　　者：彭毅弘[1] 

机构地区：[1]福建农林大学金山学院,福州350001

出　　处：《电子测量技术》2017年第3期182-185,共4页Electronic Measurement Technology

摘　　要：针对传统的数字电视机顶盒软件升级系统存在的抗故障能力弱、大文件升级时间过长和对升级数据可靠性检查力度低的问题,设计了一种改进的Loader系统,该系统采用三段Loader框架,和改进的多进程数据接收处理技术,以及使用SHA1+RSA数字签名算法对升级文件进行数字签名。实测结果表明,采用这种改进的Loader系统,大大增强了升级系统的抗故障能力,实现了升级系统的自我修复功能;提高了软件升级效率和数据可靠性,确保了信号衰减和高码率条件下的升级有效性;并实现机顶盒开发商和运营商对软件升级的控制,自动识别和拒绝非法数据的升级。An improved Loader system was designed for the traditional software upgrade system of digital set top box to improve the failure-resistant capability, upgrade efficiency of large files and data reliability check. This Loader system used three section framework, technology of receiving and processing data in multi process, and digital signature of upgrade file using SHA1 q-RSA digital signature algorithm. The actual result indicated that, this improved Loader system can greatly enhance the system＇s failure-resistant capability and realize the self-repair function, raise the upgrade efficiency and the data-s reliability, ensure the effectiveness under the condition of signal attenuation and high bit rate, and achieve the purpose of software upgrade- s controlling by set-top box developers and operators, recognizing and rejecting of illegal data automatically.

关 键 词：数字电视机顶盒 软件升级系统 多进程 数字签名 

分 类 号：TN948.55[电子电信—信号与信息处理]