Joint Bi-level Image Experts Group

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Logo of Joint Bi-level Image Experts Group (as part of Joint Photographic Experts Group) Joint Bi-level Image Experts Group logo.svg
Logo of Joint Bi-level Image Experts Group (as part of Joint Photographic Experts Group)

The Joint Bi-level Image Experts Group (JBIG) was a group of experts nominated by national standards bodies and major companies to work to produce standards for bi-level image coding. The "joint" refers to its status as a committee working on both ISO and ITU-T standards. It was one of two sub-groups of ISO/IEC Joint Technical Committee 1, Subcommittee 29, Working Group 1 (ISO/IEC JTC 1/SC 29/WG 1), whose official title is Coding of still pictures. [1] [2] [3]

Contents

The Joint Bi-level Image Experts Group created the JBIG and JBIG2 standards. [4] The group often meets jointly with the JPEG committee, which typically meets three times annually. [5]

ISO/IEC JTC1 SC29 Working Group 1 (working together with ITU-T Study Group 16 – VCEG [6] and previously also with Study Group 8 – SG8 [7] [8] [9] ) is responsible for both JPEG and JBIG standards. [10] It included two sub-groups: the Joint Photographic Experts Group (JPEG SG) and the Joint Bi-level Image experts Group (JBIG SG). [4] [1] After completing the 2019 edition of the JBIG2 standard, the JBIG subgroup was closed and its maintenance responsibilities were assigned to the general JPEG group.

In the mid-1980s, both CCITT (now ITU-T) and ISO had standardization groups for image coding: CCITT Study Group (SG) VIII (Telematic Services) and ISO TC97 SC2 WG8 (Coding of Audio and Picture Information). [11] They were historically targeted on image communication. In 1986, it was decided to create the Joint (CCITT/ISO) Photographic Expert Group. In 1988, it was decided to create the Joint (CCITT/ISO) Bi-level Image Group – JBIG. [12] [11]

Published standards

JBIG have developed following standards, which were published by ISO/IEC and/or ITU-T:

Joint Photographic Experts Group - developed standards [2] [13]
Common NamePartFirst public release date (First edition)ISO/IEC NumberITU NumberFormal Title
JBIG1 1993 ISO/IEC 11544 ITU-T Recommendations T.82, T.85 Information technology – Coded representation of picture and audio information – Progressive bi-level image compression
JBIG2 2001 ISO/IEC 14492 ITU-T Recommendations T.88, T.89 Information technology – Lossy/lossless coding of bi-level images

Note: The published JBIG2 standard was revised by three later amendments, which were consolidated into the current (2019) edition.

See also

Related Research Articles

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References

  1. 1 2 ISO/IEC JTC 1/SC 29 (2009-05-07). "ISO/IEC JTC 1/SC 29/WG 1 - Coding of Still Pictures (SC 29/WG 1 Structure)". Archived from the original on 2013-12-31. Retrieved 2009-11-11.{{cite web}}: CS1 maint: numeric names: authors list (link)
  2. 1 2 ISO/IEC JTC 1/SC 29. "Programme of Work, (Allocated to SC 29/WG 1)". Archived from the original on 2013-12-31. Retrieved 2009-11-07.{{cite web}}: CS1 maint: numeric names: authors list (link)
  3. ↑ ISO. "JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information" . Retrieved 2009-11-11.
  4. 1 2 JPEG, JBIG (2007). "About our committee". Archived from the original on 2009-10-17. Retrieved 2009-11-11.
  5. ↑ JPEG. "How does JPEG work?". Archived from the original on 2010-06-12. Retrieved 2009-11-09.
  6. ↑ "ITU-T Home : Study Groups : Study Group 16 - Question 6/16 – Visual coding" . Retrieved 2010-03-07.
  7. ↑ JBIG Committee (1999-07-16), ISO/IEC JTC 1/SC 29/WG 1 (ITU-T SG8) - 14492 FCD (PDF), jpeg.org, archived from the original (PDF) on 2010-06-12, retrieved 2010-03-07
  8. ↑ ITU-T, ITU-T Study Group 8 List of Questions under Study (Study Period 1997 - 2000) (DOC), retrieved 2010-03-07
  9. ↑ ITU-T. "ITU-T Study Group 8 (Study Period 1997-2000)" . Retrieved 2010-03-07.
  10. ↑ JPEG. "Joint Photographic Experts Group, JBIG Homepage" . Retrieved 2009-11-08.
  11. 1 2 chiariglione.org (2009-09-06). "Riding the Media Bits, The Faultline". Archived from the original on 2011-01-22. Retrieved 2010-02-09.
  12. ↑ ITU-T (2005-07-21), The First Joint ITU ISO/IEC StillImage Compression Standards (PDF), p. 3, retrieved 2009-11-12
  13. ↑ ISO. "JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information" . Retrieved 2009-11-07.
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