本帖最后由 bo_xu_canada 于 2017年12月4日 08:19 编辑
不仅蓝光机,就是新出的DVD很多都带所谓upscaling功能,就是为匹配新的高清电视而对DVD输出的像素进行数学提升,理论上是会提高一点画质的,但基本还是DVD画质。如果是D版,连原来的DVD画质都不能保证,还说啥别的
至于HDMI,现在很多DVD都有这个接口了,和蓝光没有区别
关于upscaling,没能找到中文,下面是英文的说法
The Upscaling ProcessAlthough progressive scan provided improved quality images on compatible TVs, with the introduction of HDTV, it was soon apparent that even though DVDs only provided a 720x480 resolution, the quality of those source images could be improved even further by implementing a process called Upscaling. Upscaling is a process that mathematically matches the pixel count of the output of the DVD signal to the physical pixel count on an HDTV, which is typically 1280x720 (720p), 1920x1080 (1080i or 1080p), and now, many TVs feature 3840x2160 (2160p or 4K). - 720p represents 1,280 pixels displayed across the screen horizontally and 720 pixels down the screen vertically. This arrangement yields 720 horizontal lines on the screen, which are, in turn, displayed progressively, or each line displayed following another.
- 1080i represents 1,920 pixels displayed across a screen horizontally and 1,080 pixels down a screen vertically. This arrangement yields 1,080 horizontal lines, which are, in turn, displayed alternately. In other words, all the odd lines are displayed, followed by all the even lines.
- 1080p, represents 1,080 horizontal lines displayed sequentially. This means all lines are displayed during the same pass.
- 4K (or 2160p), on the other hand, represents 3,480 horizontal lines displayed sequentially. This means all lines are displayed during the same pass. 4K is the highest quality HD display format.
The Practical Effect Of DVD UpscalingVisually, there is very little difference to the eye of the average consumer between 720p and 1080i. However, 720p can deliver a slightly smoother-looking image, due to the fact that lines and pixels are displayed in a consecutive pattern, rather than in an alternate pattern. The upscaling process does a good job of matching the upscaled pixel output of a DVD player to the native pixel display resolution of an HDTV capable television, resulting in better detail and color consistency. However, upscaling, as it is currently implemented, cannot convert standard DVD images into true high-definition (or 4K) images. In fact, although upscaling works well with fixed pixel displays, such as Plasma, LCD, and OLED TVs, results are not always consistent on CRT-based HDTVs (fortunately there aren't too many of those still in use).
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