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原帖由 BBY 于 2005-10-27 13:03 发表
不太同意,至少不能完全同意
即便就从唯像素论的观点来看,720P比1080I的像素仅低11.1%,何来一倍?
720P: 1280x720 = 921,600 像素
1080I:1920x540 = 1,036,800 像素
1,036,800 - 921,600 = 115,200 ...
资料不准确。
1、720p的确是当年ATSC向PC界妥协的产物,而日本NHK从一开始就没有考虑过720P,请注意,日本是从1968年就开始HDTV的研究。
2、日本到目前为止没有任何一家电视台采用720P。
3、美国虽然有720P,但是数量不会超过HD电视台总数的1/3,体育台也不都是采用720P,在美国最用影响的NBA和NFL(橄榄球大联盟)都是采用1080I。以下是已知广播格式的美国HDTV电视台清单:
ABC - broadcasting 720p
CBS - broadcasting 1080i
FOX - broadcasting 720p
PBS HD - broadcasting 1080i
The WB – broadcasting 1080i
UPN - broadcasting 1080i
HDNet - broadcasting 1080i
HDNet Movies – broadcasting 1080i
HBO – broadcasting 1080i
SHOWTIME – broadcasting 1080i
Discovery HD Theater - broadcasting 1080i
ESPN HD - broadcasting 720p
ESPN2 HD - broadcasting 720p
INHD & INHD2 – broadcasting 1080i
Starz! HD – broadcasting 1080i
The Movie Channel HD - broadcasting 1080i
Cinemax HD - broadcasting 1080i
TNT HD - broadcasting 1080i
NBA HDTV - broadcasting 1080i
Universal HD – broadcasting 1080i
Spice Channel - broadcasting 1080i
Dish Network - broadcasting 1080i & 720p
DirecTV - broadcasting 1080i & 720p
NFL Sunday Ticket on DirecTV – broadcasting 1080i and 720p
NFL Network – broadcasting 1080i
USA Network – broadcasting 1080i
E! - broadcasting 1080i
iN Demand – broadcasting 1080i
Outdoor Life Network - broadcasting 1080i
MHD - broadcasting 1080i(2006/01/16开播)
FOX HD - broadcasting 720p(2006年开播)
National Geographic HD - broadcasting 720p(2006年开播)
TCM HD - broadcasting 1080i(即将开播)
SportsNet New York - broadcasting 1080i(2006年秋季开播)
HBO PPV - broadcasting 1080i
ESPN HD VOD - broadcasting 720p
NBC Cable Networks – broadcasting 1080i
HDNet Sports, Entertainment – broadcasting 1080i |
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