In this dissertation , the dvb technology , which is based on mpeg - 2 , and dvb - ci standard are firstly introduced . then the multiplexing of mpeg - 2 transport stream , psi / si and the multicrypt technology in conditional access are described in detail 本文首先介紹了基于mpeg - 2的dvb數(shù)字電視廣播技術(shù),著重闡述了mpeg - 2傳送流復(fù)用, psi和dvb - si信息,以及條件接收技術(shù)中的多密技術(shù)。
According to the complete research on ca system theory and relative technology , paper introduces traditional conditional access realization method : simulcrypt and multicrypt , analyses the localization of simulcrypt and the complexity of multicrypt in terms of the design model of host and module separately 經(jīng)過(guò)對(duì)ca系統(tǒng)原理及相關(guān)技術(shù)的透徹研究后,介紹了傳統(tǒng)條件接收同密和多密的實(shí)現(xiàn)方式,分析了在機(jī)卡分離方面同密接收的局限性及多密接收的復(fù)雜性。