翻訳と辞書 Words near each other ・ Professional conduct ・ Professional conference ・ Professional conference organiser ・ Professional Contractors Group ・ Professional Convention Management Association ・ Professional corporation ・ Professional courtesy ・ Professional Cricketers' Association ・ Professional Dart Players Association ・ Professional Darts Corporation ・ Professional degrees of public health ・ Professional Developers Conference ・ Professional development ・ Professional Development League ・ Professional Developmental Football League ・ Professional Disc ・ Professional Disc Golf Association ・ Professional Distortion ・ Professional Distributor Magazine ・ Professional Divers' Association of Australia ・ Professional diving ・ Professional Diving Instructors Corporation ・ Professional Doctor of Diplomacy ・ Professional Doctorate in Engineering ・ Professional Dreamer ・ Professional Dreamers ・ Professional Electrical Apparatus Recyclers League ・ Professional employer organization ・ Professional Engineers in California Government ・ Professional Engineers of Bangladesh Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Professional Disc ： ウィキペディア英語版 Professional Disc Professional Disc (PFD) is a digital recording optical disc format introduced by Sony in 2003 primarily for XDCAM, its new tapeless camcorder system. It was one of the first optical formats to utilize blue laser, which allowed for higher density of data to be stored on optical media compared to infrared laser technology used in the CD and red laser technology used in the DVD format. ==Technology== PFD uses a 405 nm wavelength and a numerical aperture (NA) of 0.85 for the laser, allowing 23 GB of data to be stored on one 12 cm disc – the equivalent to nearly five single-layer DVDs, and a 1x speed data transfer rate of 88 Mbit/s for reading and 72 Mbit/s for writing. After the 23GB disc was released, a dual-layer 50 GB was developed and released. This format is sometimes confused with the Blu-ray Disc format, another optical disc format using blue-violet lasers and supported by Sony. Even the PFD's caddy and Blu-ray's bk prototype caddy (later dropped) looked very similar. Capabilities differ; single-layer PFD discs have a capacity of 23 GB whereas Blu-rays can store 25 GB. However, Blu-ray Discs currently allows a 2x data transfer rate of 72 Mbit/s – lower than PFD. This is because PFD discs use much higher quality media and drives use higher quality components, making them prohibitively expensive for the consumer segment to which Blu-ray is aimed. 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「Professional Disc」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.