高畫質電視傳輸之技術與經濟分析

Abstract

高畫質電視的傳輸介質包括地面廣播、衛星廣播與有線網路傳輸。在日本 及歐洲，由於衛星涵蓋範圍廣且立即可行，故選擇它作為廣播高畫質視訊 的工具；美國基於廣播自由的考量，認為大眾媒體不應由少數傳播業者所 操控，所以決定選用地面廣播的方式，而聯邦通訊委員會 ( Federal Communication Commission, FCC ) 者能因此廣播高畫質電視。 畫質電 視的投資在其開始廣播後的初期幾年不見 o也是為何世界各國的廣播業者 對其持觀望態度之主要原因。 玥e質電視的技術、類比╱數位視訊傳輸技 術及新 尬蝷O。評估不同高畫質電視傳輸介質的技術和經濟可 戽蚴媊釦 痚穇艦峖魚u電視網路作為傳輸高畫質電視的媒介。 The media for delivering HDTV to consumers' homes include terrestrial broadcasting, satellite broadcasting and cable TV networks. In Japan and Europe, satellite was chosen, because it is the most readily available vehicle to deliver HDTV sig- nals to a wide area of receivers. In the U.S., terrestrial broadcasting of HDTV was mandatary. One of the rationales was the concern of Freedom of Press which the U.S. Congress does not think that press controlled by few delivery media will be good for the public. Hence, the FCC would like to see that every existing terrestrial broadcaster gets into HDTV broad- casting. It is common belief that any HDTV investment could justify economically at least in the first several years HDTV broadcasting starts. This is why broadcasters worldwide generally feel lukewarm about HDTV. This research investigates HDTV technologies, analog/digital video delivery technologies, and the potential new video applications and services that can be offered. Af- ter evaluating the technical and economic feasibilities of different HDTV delivery media, this thesis recommends that preferred HDTV delivery medium in Taiwan should be the cable TV network.