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本文介绍了一种具有交互及POS功能的有线数字电视机顶盒的设计。文章首先根据POS和数字电视机顶盒网络接入技术的比较,选择以太网接入技术,并介绍了具有交互及POS功能数字机顶盒的基本组成;介绍了数字机顶盒系统的软硬件结构,并对系统使用的嵌入式实时内核的原理进行了分析和研究。其次,针对设计的目标,综合考虑各方面因素,选择一种最适合的系统解决方案,并在相应的开发平台上展开系统的设计工作。介绍了机顶盒网络接口模块的实现,包括以太网接口芯片的特性、网络模块的软硬件设计,它是实现交互功能及POS功能的基础。再次,介绍了POS功能实现的组成,并对其安全性作了深入的研究,介绍了POS功能实现的通信过程、工作原理及业务处理流程。最后,通过系统的软硬件测试,验证了系统设计的可行性,实现了Internet接入、网页浏览、水电气费用的缴纳等功能。本设计为今后开展更多交互增值业务和家庭银行提供了基础。
This article describes the design of a cable digital TV set-top box with interaction and POS capabilities. According to the comparison between POS and digital TV set-top box network access technology, the article chooses Ethernet access technology and introduces the basic composition of digital set-top box with interaction and POS function. The hardware and software structure of digital set-top box system is introduced, The principle of embedded real-time kernel is analyzed and researched. Secondly, in view of the design goal, considering various factors synthetically, choose the most suitable system solution and carry out systematic design work on the corresponding development platform. The realization of the set-top box network interface module is introduced, including the characteristics of the Ethernet interface chip and the hardware and software design of the network module. It is the basis of realizing the interactive function and POS function. Thirdly, it introduces the composition of POS function implementation, and makes an in-depth study of its security. The communication process, working principle and business process of POS function are introduced. Finally, through the system hardware and software testing, the feasibility of the system design is verified, and the functions such as Internet access, web browsing, water and electricity fee payment and so on are realized. This design provides the foundation for more interactive value-added services and home banking in the future.