基于IP技术的数字电视前端系统优化技术研究

发布时间：2018-09-18 15:25

【摘要】：中国的有线电视经过四十多年的发展已经进入成熟期,四十多年来,有线电视经历了几大重要的发展时期。八十年代的文化大发展,九十年代的国家信息大变革,有线电视跟上了时代的步伐,服务了社会,壮大了自己。电视前端系统从无线传输到有线传输,再从模拟前端到数字前端,每一次变革都使有线电视技术得到了长足的发展。随着科学技术的不断发展,人类社会己经进入了数字化、信息化时代。节目数量越来越多,画面质量越来越清晰,从3D频道的推出,再到时下最火的VR技术,传统的模拟电视已经无法进一步承载有线电视用户的更加丰富多样的业务需求,有线电视前端系统向IP化迈进势在必行。本文介绍了数字电视基本情况和IP前端的优势,依据作者在数字电视前端工作经验,研究了IP化数字前端系统的关键技术,包括IP组播技术、IGMP等相关协议。对数字电视的编码技术做了简要的介绍,并介绍了IP前端的组网方式,以及对设备技术指标与选型进行了详细的说明。本文作者参与了吉林省网中心机房数字前端IP化改造的过程,并参与了县市自办节目IP化改造的过程,根据实际施工中遇到的问题,提出了解决方案。并对建成后IP前端系统的性能进行了测试。IP前端的建成大大减少了整个前端系统的设备,提高了系统的稳定性,使维护更加便捷。IP技术的发展为用户提供了数量更多、质量更好的电视节目,满足了用户观看需求。
[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.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN949.197

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