| WiththedigitalTV technology developing, digitalTV industry in our country hasbeen expandingcontinuously in the past few years.Currently, our country is vigorouslypromoting the policy of replacing analog TV with digital TV.It is expected thatbroadcast TV will be completely digitalized in2015. Therefore, there isa huge marketand a vast business opportunity in digital TV industry.At the same time,with newterminal displaysdevelopingfastly, the methods of receiving TV programs arechanging.We can receive digitalTVwheneverandwherever by laptop,smartphone andtabletPC. Furthermore, the new terminal displayshave the interactiveadvantages.Therefore,more and more peple are beginning to use these methodstowatch TV.This thesis is written on the basis of credible broadband multimedia trial networkproject. The purpose of the project is to develop a TV transmiting and receiving system.In general,the main work that I did in the project could be summarized as follows:(1) Developingthedriver of the USB TV receiver stick in Windows operatingsystem.Traditionally, driver programs of audio and video equipments in Windowsoperating system are based on Stream classarchitecture.There are some defects of thisarchitecture,such as processing audio and vedio respectively and large amount ofcodes.To overcome these shortcomings, driver of the USB TV receiver stick isdesigned to base on AVStream classarchitecture.Finally,sticking points such as deviceinitialization, tuninganddemodulation and transmission of TS are all realized.(2) Developing the TV reception program based on the USB TV receiverstick.Currently, the majority of the TV reception scenarios get the information such asprogram providers and program names by analyzing TS.It costs some time whenparsing these information and that has immediate impct on user experience. We add theVOD module which integrates IP and Cable in the project.VOD communicates withthe server by IP and receives the TV program RF from IP-QAM by cable. |
PDF Full Text Request