基于IP技術(shù)的數(shù)字電視前端系統(tǒng)優(yōu)化技術(shù)研究
[Abstract]:After more than 40 years of development, CATV in China has entered a mature period. In the past 40 years, CATV has experienced several important periods of development. With the development of culture in 1980's and the great change of national information in 1990s, CATV has kept up with the pace of the times, served the society and strengthened itself. Television front-end system from wireless transmission to cable transmission, and then from analog front-end to digital front-end, each change has made cable television technology has been greatly developed. With the continuous development of science and technology, human society has entered the digital, information age. The number of programs is increasing and the picture quality is becoming clearer. From the launch of 3D channels to the hottest VR technology nowadays, traditional analog television can no longer further support the richer and more diversified business needs of cable television users. It is imperative for CATV front-end system to IP. This paper introduces the basic situation of digital TV and the advantages of IP front-end. Based on the author's working experience in DTV front-end, this paper studies the key technologies of IP digital front-end system, including IP multicast technology and other related protocols. This paper briefly introduces the coding technology of digital TV, and introduces the networking mode of IP front-end, and explains in detail the technical specifications and selection of equipment. The author of this paper has participated in the process of the IP transformation of the digital front end of the central computer room in Jilin Province, and has participated in the process of the transformation of the self-run program IP in the county and city. According to the problems encountered in the actual construction, the author has put forward the solution. The performance of the IP front-end system is tested. The completion of the IP front-end greatly reduces the equipment of the whole front-end system, improves the stability of the system, and makes the maintenance more convenient. The development of .IP technology provides more and more users. Better quality TV programs meet users' viewing needs.
【學(xué)位授予單位】:吉林大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TN949.197
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