digital video effect 中文意思是什麼
digital video effect
解釋
數字特技-
Vod ( video on demand ) system can be widely used in many fields, such as long distance education, digital library, news on demand, tv on demand and etc. video server is the key part of vod system, whose performance has direct effect on the service quality of vod system
視頻點播系統可以廣泛地應用於遠程教學、數字圖書館、新聞點播、電子商貿、電視點播等文化、商業及娛樂的各種領域，具有很高的實用價值。視頻服務器（ videoserver ）是視頻點播系統中最關鍵的組成部分，它的性能直接影響視頻點播系統所提供的服務質量，因此視頻服務器的設計是分散式多媒體領域的重要研究課題。 -
In fact, scaling technology is an essential component in many image / video processing such as to magnify / minify still image, to achieve special effect like picture - in - picture, to compress or transform digital video with spatial scalability etc. in this thesis we mainly employ this technology in video transcoding, which is a powerful but computationally intensive tools to convert one kind of video format into another, meeting different demand such as lower bitrates or various display terminals. in sum, there are two kinds of scaling schemes : one is in spatial domain and the other in transform domain. the scheme in transform domain can provide very good performance, that is, efficient computation and desirable image quality, whereas it has some disadvantage which is impossible or hardly to o vercome, especially some scenarios require arbitrary ratio zoom in horizontal and vertical, and excellent visual effect
兩種方法都各有其利弊：變換域的方法是利用現有常用的視頻壓縮方案都是基於dct這個特點，所以可以直接在變換域做處理，這樣可以節省大量的計算，但其缺點是由於dct是基於塊的變換，如8 8 ，所以很難找到一種方案可以進行任意比例的縮放，尤其是在縱橫縮放比例不一致的情形，但這對諸如hd縮放到sd和空域分級的壓縮方案來說尤為重要，基於空域濾波的方法卻沒有這樣的限制，同時可以保證縮放后的圖像的質量遠高於基於變換域的方法，為了達到高的縮放質量，就不可避免導致計算量過大。 -
Dvs digital video effect
數字視頻特技 -
Dve digital video effect
數字視頻特技 -
The multicenter superwide view reappearance system which based on a technique of digital video composition is a complete set of innovative technological system from photographing and producing to output in partition and then to network synchronous playing and till a integral display. it applys many kinds of modem technique, such as photographing, digital video producing, multimedia, network and display, and on the commonly used platform it has realized a effect through software technique that only expensive and special equipment can achieve
基於數字視頻合成技術的多通道超寬視景再現系統，是一種從拍攝製作到分割輸出再到網路同步播放直至一體化顯示的一整套創新的技術體系，它整合應用攝錄像技術、數字視頻製作技術、多媒體技術、網路技術、顯示技術等多種現代技術，在通用設備平臺上，利用軟體技術實現了昂貴特種設備才能實現的效果。
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