From Wikipedia, the free encyclopedia
File format
Motion JPEG 2000
(MJ2 or MJP2) is a file format for motion sequences of
JPEG 2000
images
and associated
audio
, based on the
MP4
and
QuickTime
format. Filename extensions for Motion JPEG 2000 video files are
.mj2
and
.mjp2
, as defined in RFC 3745.
ISO Standards
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]
MJ2, first defined by Part 3 of the ISO Standard for JPEG 2000 ISO/IEC 15444 in November 2001
[2]
(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
.
[3]
MPEG vs MJ2
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Motion 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,
[4]
but at the expense of increased storage and bandwidth requirements.
History
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From 1997 to 2000, the
JPEG 2000
image compression
standard was developed by a
Joint Photographic Experts Group
(JPEG) committee chaired by Swiss-Iranian engineer Touradj Ebrahimi (later the JPEG president).
[5]
In contrast to the original 1992
JPEG
standard, which is a
discrete cosine transform
(DCT) based
lossy compression
format for static
digital images
, JPEG 2000 is a
discrete wavelet transform
(DWT) based compression standard that could be adapted for motion imaging
video compression
with the Motion JPEG 2000 extension. JPEG 2000 technology was later selected as the
video coding standard
for
digital cinema
in 2004.
[6]
See also
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]
References
[
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]
- ^
Motion JPEG 2000 File Format
(Full draft). Sustainability of Digital Formats. Washington, D.C.: Library of Congress. 11 January 2012
. Retrieved
1 December
2021
.
- ^
"Motion JPEG 2000 Part 3"
.
Joint Photographic Experts Group, JPEG, and Joint Bi-level Image experts Group, JBIG
. Archived from
the original
on 5 October 2012
. Retrieved
21 June
2014
.
- ^
"T.802 : Information technology - JPEG 2000 image coding system: Motion JPEG 2000"
. January 2005
. Retrieved
21 June
2014
.
- ^
Hunter, Jill.
"Digital cinema reels from motion JPEG2000 advances"
.
EETimes
. Retrieved
21 June
2014
.
- ^
Taubman, David; Marcellin, Michael (2012).
JPEG2000 Image Compression Fundamentals, Standards and Practice: Image Compression Fundamentals, Standards and Practice
.
Springer Science & Business Media
.
ISBN
9781461507994
.
- ^
Swartz, Charles S. (2005).
Understanding Digital Cinema: A Professional Handbook
.
Taylor & Francis
. p. 147.
ISBN
9780240806174
.
External links
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ISO
standards
by standard number
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20000?29999
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30000+
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