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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク High-motion ： ウィキペディア英語版 High-motion High motion is the characteristic of video or film footage displayed possessing a sufficiently high frame rate (or field rate) that moving images do not blur or strobe even when tracked closely by the eye. The most common forms of high motion are NTSC and PAL video (i.e., "normal television") at their native display rates. Movie film (at the standard 24 frame/s) does not portray high motion even when shown on television monitors. Alternate use: In the context of digital video compression, "high motion" is sometimes used to describe footage in which frames change too rapidly for motion prediction techniques to be effective. This article describes only the high frame rate definition. == History == In the early 20th century when 35 mm movie film was developed, producers found that 18–24 frames per second was adequate for portraying motion in a movie theater environment. Flicker was still a problem at these rates, but projectors solved this by projecting each frame twice, thus creating a refresh rate of 36–48 Hz without using excessive amounts of film. However when television was developed, there was no corresponding way to capture a video frame and project it twice. The solution to this was interlace, which had a side effect that 50 to 60 images per second were presented to the viewer. Television producers found that these higher image rates made certain shots possible that were unacceptable on film. Camera pans and text scrolls could be faster. Handheld camera work seemed less objectionable, and most importantly, sports action was much clearer — particularly when following a ball was critical. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「High-motion」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.