有(you)線數(shu)字電(dian)(dian)(dian)(dian)視(shi)(shi)(shi)(shi)就是用(yong)有(you)線電(dian)(dian)(dian)(dian)視(shi)(shi)(shi)(shi)網(wang)絡(luo)傳(chuan)輸(shu)(shu)數(shu)字電(dian)(dian)(dian)(dian)視(shi)(shi)(shi)(shi)節目(mu)的簡稱。由(you)于數(shu)字信(xin)號在(zai)傳(chuan)輸(shu)(shu)過程中不(bu)易受干(gan)擾，用(yong)戶收(shou)看數(shu)字電(dian)(dian)(dian)(dian)視(shi)(shi)(shi)(shi)時沒有(you)模擬(ni)電(dian)(dian)(dian)(dian)視(shi)(shi)(shi)(shi)信(xin)號常(chang)有(you)的雪(xue)花、重影等現象。有(you)線數(shu)字電(dian)(dian)(dian)(dian)視(shi)(shi)(shi)(shi)可將電(dian)(dian)(dian)(dian)視(shi)(shi)(shi)(shi)臺數(shu)字化攝(she)錄編的電(dian)(dian)(dian)(dian)視(shi)(shi)(shi)(shi)節目(mu)內容(rong)毫無損傷(shang)地傳(chuan)送給用(yong)戶，使用(yong)戶所觀看的節目(mu)更加(jia)清晰(xi)逼真(zhen)。同(tong)時，和原來(lai)模擬(ni)電(dian)(dian)(dian)(dian)視(shi)(shi)(shi)(shi)傳(chuan)輸(shu)(shu)相比，數(shu)字電(dian)(dian)(dian)(dian)視(shi)(shi)(shi)(shi)傳(chuan)輸(shu)(shu)頻(pin)率資源利用(yong)率高，同(tong)樣的帶寬可以傳(chuan)輸(shu)(shu)更多的信(xin)號，從而可以極大(da)豐富用(yong)戶的電(dian)(dian)(dian)(dian)視(shi)(shi)(shi)(shi)節目(mu)。
與傳統模擬電視相比，有(you)線(xian)數字電視有(you)以(yi)下特點(dian)和優勢：
(1)圖像更(geng)清晰：數字電視畫面清晰度(du)可與DVD相媲(pi)美，伴音更(geng)逼(bi)真(zhen)優美。
(2)頻道更豐富：有線(xian)電(dian)視數字(zi)化使頻道資源(yuan)得到充分釋放，網絡傳(chuan)輸(shu)模擬電(dian)視一般只能三十幾套，而傳(chuan)輸(shu)數字(zi)電(dian)視可達幾百套。
(3)收視更(geng)方(fang)(fang)便(bian)：獨特的電(dian)子節目(mu)指南讓您(nin)使用數字電(dian)視更(geng)加方(fang)(fang)便(bian)。
(4)內容更(geng)精(jing)彩：提供(gong)更(geng)多的(de)公共電視、付(fu)費電視、視頻點播、資訊服務和股票實時(shi)行(xing)情等。
(5)節目(mu)更個(ge)性(xing)：大量公(gong)共(gong)電視(shi)頻(pin)(pin)道和專業(ye)化(hua)的付費電視(shi)頻(pin)(pin)道為您量身定做，并(bing)且(qie)具有互動點播功(gong)能，讓您隨(sui)時(shi)欣(xin)賞到喜愛(ai)的電影(ying)、電視(shi)劇及各種專業(ye)頻(pin)(pin)道節目(mu)，滿足您個(ge)性(xing)化(hua)娛(yu)樂需求。
