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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.cite-ref-sc29-wg1-1-0[1]cite-ref-jpeg-sc29-2-0[2]cite-ref-3[3]

The Joint Bi-level Image Experts Group created the JBIG and JBIG2 standards.cite-ref-jpeg-jbig-4-0[4] The group often meets jointly with the JPEG committee, which typically meets three times annually.cite-ref-jpeg-work-5-0[5]

ISO/IEC JTC1 SC29 Working Group 1 (working together with ITU-T Study Group 16 – VCEGcite-ref-6[6] and previously also with Study Group 8 – SG8cite-ref-7[7]cite-ref-8[8]cite-ref-9[9]) is responsible for both JPEG and JBIG standards.cite-ref-10[10] It included two sub-groups: the Joint Photographic Experts Group (JPEG SG) and the Joint Bi-level Image experts Group (JBIG SG).cite-ref-jpeg-jbig-4-1[4]cite-ref-sc29-wg1-1-1[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).cite-ref-chiariglione-jpeg-history-11-0[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.cite-ref-12[12]cite-ref-chiariglione-jpeg-history-11-1[11]

• Published standards

• See also

• References

• External links

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

| Common Name | Part | First public release date (First edition) | ISO/IEC Number | ITU Number | Formal 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.

• Joint Photographic Experts Group (JPEG)

• Moving Picture Experts Group (MPEG)

cite-note-sc29-wg1-11. ↑ citerefiso-iec-jtc-1-sc-292009ISO/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)

cite-note-jpeg-sc29-22. ↑ citerefiso-iec-jtc-1-sc-29ISO/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)

cite-note-33. ↑ citerefisoISO. "JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information". Retrieved 2009-11-11.

cite-note-jpeg-jbig-44. ↑ citerefjpeg-jbig2007JPEG, JBIG (2007). "About our committee". Archived from the original on 2009-10-17. Retrieved 2009-11-11.

cite-note-jpeg-work-55. ↑ citerefjpegJPEG. "How does JPEG work?". Archived from the original on 2010-06-12. Retrieved 2009-11-09.

cite-note-66. ↑ "ITU-T Home : Study Groups : Study Group 16 - Question 6/16 – Visual coding". Retrieved 2010-03-07.

cite-note-77. ↑ citerefjbig-committee1999JBIG 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

cite-note-88. ↑ citerefitu-tITU-T, ITU-T Study Group 8 List of Questions under Study (Study Period 1997 - 2000) (DOC), retrieved 2010-03-07

cite-note-99. ↑ citerefitu-tITU-T. "ITU-T Study Group 8 (Study Period 1997-2000)". Retrieved 2010-03-07.

cite-note-1010. ↑ citerefjpegJPEG. "Joint Photographic Experts Group, JBIG Homepage". Retrieved 2009-11-08.

cite-note-chiariglione-jpeg-history-1111. ↑ citerefchiariglione-org2009chiariglione.org (2009-09-06). "Riding the Media Bits, The Faultline". Archived from the original on 2011-01-22. Retrieved 2010-02-09.

cite-note-1212. ↑ citerefitu-t2005ITU-T (2005-07-21), The First Joint ITU ISO/IEC StillImage Compression Standards (PDF), p. 3, retrieved 2009-11-12

cite-note-iso-jtc1-sc29-131. citerefisoISO. "JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information". Retrieved 2009-11-07.

• Official JBIG page