The Service Information In DTV And The Study On Electronic Program Guide System

Digital TV is the third generation television after the black and white television and the color television. Because of taking digital technical in Video and Audio compressing and coding;DTV take on a new look. It not only provide high definition video and high quality .. audio,but also provide muti-service .Which made the user got the satisfied audio-visual feeling and satisfied service .DTV could make full usev of the present broadcast network .telecom network and computer network. DTV can receive many kinds of services that traditional analog television could not receive,such as receiving EMAIL,shopping by INTERNET,Web browsing,VOD,Tele-medical,tele-school and so on . DTV became the platform by which you can get information,enjoy yourself and buy something in home. The developing direction of DTV is HDTV (high definition television). The industrialization of DTV will force the industry development of microelectronics manufacture,telecommunication,television system,the software and hardware of computer,movie etc . So it can boost the industry of electronic,communication and others .At present,making ourselves DTV specification and owning the right of independence knowledge is of the utmost urgency to our country. Which are the important factors promoting the DTV industrialization of our country.The electronic program guide (EPG) is the important composition of DTV system .It can provide user the friendly-user interface,which can convenient for the user acquiring the service information what they want. And the service of EPG quality can effect on the economic income of the service provider .The EPG system is composite of head-end system and tail-end system .The SI server of head-end system can generate the SI data,and the rail-end system can demux,decode SI data,create SI database at ROM .The technical of DTV is not mature in our country,many technical is on researching,and the specification owning by ourselves is on constituting,In the article,I have a pilot study on the service information and EPG in DTV system. I expatiate the DVB SI (EN 300 468 ) specification and EPG realizing.