Design And Implementation Of Digital Television Termial Digital Navigation System

Digital TV value-added service formally enacted today,penetration rate has reached more than 80%,for the user the pain point is how to find their own love to see the channel.So we designed and developed video mosaic navigation service navigation systems.With the development of digital TV business,operators require video mosaic navigation service,to increase the experience of digital TV user to select the video interface quickly.The designs and implements navigation system of this thesis bases on three parts,which is called forward stream server,terminal DVB data analysis and WEB.This paper describes the requirements,design,implementation,and testing of the visual navigation system software.This paper describes form the system front-end streaming server,the front-end streaming server push down the data,video footage from the terminal synthesis,and can be freely combined,position exchanged,move dynamic display,flexible application presentation.Each small video screen is independent SPTS,which is convenient for application development.A front end system that can output multiple sizes of small video at the same time.This paper is based on the idea of easy deployment and easy promotion,and the front-end system uses universal server architecture,which is beneficial to system construction and cost reduction.Video transcoding is a distributed computing system,which is easy to expand and has good fault-tolerant capability.The terminal application is written and implemented in HTML and JAVASCRIPT language,and the application development is simple and fast.Porting,middleware and application layer three terminal software structure,there is no need to modify and upgrade the terminal application software when changing the application,new applications can support the rapid deployment of small video logo overlay,equalization processing,the front end has the advantages of simple operation,good user experience..The video mosaic navigation system has been formally launched in many areas after detailed testing and acceptance.It has been shown in many scenarios of program navigation and video surveillance,and has brought better application experience to users.It has also brought better application and promotion to operators.