thumb|class=skin-invert-image|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.

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

ISO/IEC JTC1 SC29 Working Group 1 (working together with ITU-T Study Group 16 – VCEG and previously also with Study Group 8 – SG8) is responsible for both JPEG and JBIG standards. It included two sub-groups: the Joint Photographic Experts Group (JPEG SG) and the Joint Bi-level Image experts Group (JBIG SG). 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.

|-

! width="8%" | Common Name || width="8%" | Part || width="8%" | First public release date (First edition) || width="16%" | ISO/IEC Number || width="15%" | 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.

See also

  • Joint Photographic Experts Group (JPEG)
  • Moving Picture Experts Group (MPEG)

References

  • Official JBIG page