Joint Bi-level Image Experts Group
The Joint Bi-level Image Experts Group (JBIG) is 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 is 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), which official title is Coding of still pictures.[1][2][3]
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 (also known as ITU-T SG8) is responsible for both JPEG and JBIG standards.[4] It includes two sub-groups: Joint Photographic Experts Group (JPEG SG) and Joint Bi-level Image experts Group (JBIG SG).[4]
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).[6] 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.[7][6]
Published Standards
The JBIG standards consist of different Parts. Each part covers a certain aspect of the whole specification. The published JBIG2 standard was revised by later amendments.
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 | 2000 | ISO/IEC 14492 | ITU-T Recommendations T.88, T.89 | Information technology – Lossy/lossless coding of bi-level images |
See also
- Joint Photographic Experts Group (JPEG)
- Moving Picture Experts Group (MPEG)
References
- ^ 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)". Retrieved 2009-11-11.
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: CS1 maint: numeric names: authors list (link) - ^ a b ISO/IEC JTC 1/SC 29. "Programme of Work, (Allocated to SC 29/WG 1)". Retrieved 2009-11-07.
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: CS1 maint: numeric names: authors list (link) - ^ ISO. "JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information". Retrieved 2009-11-11.
- ^ a b c JPEG, JBIG (2007). "About our committee". Retrieved 2009-11-11. Cite error: The named reference "jpeg-jbig" was defined multiple times with different content (see the help page).
- ^ JPEG. "How does JPEG work?". Retrieved 2009-11-09.
- ^ a b chiariglione.org (2003-08-03). "Riding the Media Bits, The Faultline". Retrieved 2009-11-12.
- ^ ITU-T (2005-07), The First Joint ITU ISO/IEC StillImage Compression Standards (PDF), p. 3, retrieved 2009-11-12
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(help) - ^ ISO. "JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information". Retrieved 2009-11-07.