 According to a press release from the Group, in its lossless mode JBIG2 typically generates files 3–5 times smaller than Fax Group 4 and 2–4 times smaller than JBIG, the previous bi-level compression standard released by the Group.JBIG2 was published in 2000 as the international standard ITU T.88, and in 2001 as ISO/IEC 14492.Ideally, a JBIG2 encoder will segment the input page into regions of text, regions of halftone images, and regions of other data.