Motion JPEG 2000


Motion JPEG 2000 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

MJ2, first defined by Part 3 of the ISO Standard for JPEG 2000 ISO/IEC 15444 in November 2001 as a standalone document, has later been defined by , , additional profiles for archiving applications, and by 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 .

MPEG vs MJ2

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, but at the expense of increased storage and bandwidth requirements.

History

From 1997 to 2000, the JPEG 2000 image compression standard was developed by a Joint Photographic Experts Group committee chaired by Swiss-Iranian engineer Touradj Ebrahimi. In contrast to the original 1992 JPEG standard, which is a discrete cosine transform based lossy compression format for static digital images, JPEG 2000 is a discrete wavelet transform 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.