| 词条 | Motion JPEG 2000 |
| 释义 |
| name = Motion JPEG 2000 | icon = | logo = | screenshot = | caption = | extension = .mj2, .mjp2 | mime = video/mj2 | type code = | uniform type = | magic = 12 byte string: X'0000 000C 6A50 2020 0D0A 870A' | owner = Joint Photographic Experts Group | released = | latest release date = | genre = moving image | container for = video, sound | contained by = | extended from = ISO base media file format | extended to = Motion JPEG 2000 Simple Profile, Motion JPEG 2000 Motion Picture Archive Preservation Format Profile, Motion JPEG 2000 Motion Picture Archive Access Format Profile | standard = ISO/IEC 15444-3:2007, ITU-T T.802 | free = | url =http://www.jpeg.org/jpeg2000/j2kpart3.html }} Motion JPEG 2000 (MJ2 or MJP2) is a file format for motion sequences of JPEG 2000 images and associated audio, based on the MP4/QuickTime format. Filename extensions for Motion JPEG 2000 video files are .mj2 and .mjp2, as defined in RFC 3745. ISO Standards{{see also|JPEG 2000#Motion JPEG 2000}}MJ2, first defined by Part 3 of the ISO Standard for JPEG 2000 ISO/IEC 15444 in November 2001[1] (ISO/IEC 15444-3:2002) as a standalone document, has later been defined by ISO/IEC 15444-3:2007, ISO/IEC 15444-3:2007/Amd 1:2010, additional profiles for archiving applications, and by ISO/IEC 15444-12 which defines the JPEG 2000 base media format, which contains the timing, structure, and media information for timed sequences of media data. The standard is available for download from ITU-T as their Recommendation T.802.[2] MPEG vs MJ2Motion JPEG2000 was always intended to coexist with MPEG. Unlike MPEG, MJ2 does not implement inter-frame coding; each frame is coded independently using JPEG 2000. This makes MJ2 more resilient to propagation of errors over time, more scalable, and better suited to networked and point-to-point environments, with additional advantages over MPEG with respect to random frame access,[3] but at the expense of increased storage and bandwidth requirements. See also
References
1. ^{{cite web|title=Motion JPEG 2000 Part 3|url=http://www.jpeg.org/jpeg2000/j2kpart3.html|website=Joint Photographic Experts Group, JPEG, and Joint Bi-level Image experts Group, JBIG|accessdate=21 June 2014|deadurl=yes|archiveurl=https://www.webcitation.org/6ArTdULNs?url=http://www.jpeg.org/jpeg2000/j2kpart3.html|archivedate=22 September 2012|df=}} 2. ^{{cite web | url=http://www.itu.int/rec/T-REC-T.802/en | title=T.802 : Information technology - JPEG 2000 image coding system: Motion JPEG 2000 | date=January 2005 | accessdate=21 June 2014}} 3. ^{{cite web|last1=Hunter|first1=Jill|title=Digital cinema reels from motion JPEG2000 advances|url=http://www.eetimes.com/document.asp?doc_id=1201549|website=EETimes|publisher=EETimes|accessdate=21 June 2014}} External links
4 : JPEG|Graphics file formats|ISO/IEC standards|ITU-T recommendations |
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