看來是有些朋友對規格有點混淆，首先樓主想問的應該是1080i或1080P吧？因為並沒有1920x1080P這樣的規格，目前所謂的“真正“1080P就是1920x1080 pixels（其實還不到1080P(2160x1440)），因此如果是1920x1080P那就要有3840x2160 pixels的銀幕來顯示，這樣的規格已經接近4K了，4K(4,096 x 2,4004)的產品（投影和攝影機）雖然已經有了，但都為專業用(如SONY 4k電影院用投影機）或JVC的實驗機種，要變成家用普及規格還要數年的時間；目前家用平面電視機和投影機的最高規格就設在1920x1080（沒有P喔），理論上有1920x1080規格的攝錄影機，就能拍出目前家用規格下最高的品質。
下面是我從美國Cnet網站抓的一小段說明，僅供各位參考；如果大家還有興趣，我可以整理一下近期家用攝錄影機規格給大家看一下。
1. 1080p defined
1080p resolution--which equates to 1,920x1,080 pixels--is the latest HD Holy Grail. That's because 1080p monitors are theoretically capable of displaying every pixel of the highest-resolution HD broadcasts. On paper, they should offer more than twice the resolution of today's 1,280x720, or 720p, HDTVs, such as Samsung's HL-P5085W. Some companies, such as LG, refer to these super-high-res of sets as ultra-HD, while others prefer to substitute true or full for ultra.
2. Why 1080p is theoretically better than 1080i
1080i, the former king of the HDTV hill, actually boasts an identical 1,920x1,080 resolution but conveys the images in an interlaced format (the i in 1080i). In a tube-based television, otherwise known as a CRT, 1080i sources get "painted" on the screen sequentially: the odd-numbered lines of resolution appear on your screen first, followed by the even-numbered lines--all within 1/30 of a second. Progressive-scan formats such as 480p, 720p, and 1080p convey all of the lines of resolution sequentially in a single pass, which makes for a smoother, cleaner image, especially with sports and other motion-intensive content. As opposed to tubes, microdisplays (DLP, LCoS, and LCD rear-projection) and other fixed-pixel TVs, including plasma and LCD flat-panel, are inherently progressive in nature, so when the incoming source is interlaced, as 1080i is, they convert it to progressive scan for display
Above are from the reviews of CNET.com
若有錯誤還請不吝指正。
[ 本帖最後由 tpe 於 2008-1-26 11:14 編輯 ] |
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