Digital television ( dtv ) is the third generation tv after black and white tv and color tv 數(shù)字電視是繼黑白電視和彩色電視之后的第三代電視。
Technology of digital television ( dtv ) broadcasting is the third revolution in the technical history of tv broadcasting 數(shù)字電視廣播技術(shù)是廣播電視技術(shù)史上的第三次飛躍。
I plunged into the alphabet - soup world of digital television ( dtv ) in 2003 , shortly after i replaced my electron - gun boob tube with a 42 - inch plasma flat panel 2003年,我把映像管電視機(jī)換成42 ?電漿電視后不久,就開始研究數(shù)位電視。
The digital television ( dtv ) will finally replace the analog television to become a new information industry , and it will eventually raise a new high economic tide “數(shù)字電視”將取代模擬電視成為新興的信息產(chǎn)業(yè)之一,將掀起新的經(jīng)濟(jì)浪潮。
This article discusses some interactive services delivered via digital television ( dtv ) system with or without return channels . the method proposed here for the implementation of these services is simple and economical for hybrid dtv system 對數(shù)字電視中的一些交互業(yè)務(wù)進(jìn)行了討論,并針對目前電視系統(tǒng)的特點(diǎn)提出了簡單實用的實現(xiàn)交互數(shù)字廣播的方法。
Conditional access technology ( pay - tv ) has been considered the motivity and trend of the development of digital television ( dtv ) in the globe . but in the common pay - tv system , the key which is used for decoding is stored in the set - top - box ( stb ) 在全球范圍內(nèi),有條件接收(付費(fèi)電視)業(yè)務(wù)已被確認(rèn)是數(shù)字電視發(fā)展的動力和趨勢,但是,在通常的付費(fèi)電視系統(tǒng)中,用戶的解碼解密模塊均被置于機(jī)頂盒中,系統(tǒng)安全性較低。
Conditional access ( ca ) is a technology used to control access to digital television ( dtv ) services to authorized users by encrypting the transmitted programming . an emm provides general information about the subscriber and the status of the subscription . the emm is sent with the ecm 數(shù)字電視用戶管理系統(tǒng)通過對用戶訂購信息的記錄與處理,形成用戶數(shù)據(jù)庫,并經(jīng)由與條件接收系統(tǒng)的接口,向條件接收系統(tǒng)發(fā)送用戶授權(quán)管理信息的基本數(shù)據(jù),條件接收系統(tǒng)據(jù)此實現(xiàn)對用戶收看數(shù)字電視節(jié)目的控制。