Digital File Formats: The Short Definition of JBIG2
Image compression experts from a variety of companies (including but not limited to Siemens, AT&T, IBM and Xerox) combined their skills to develop the International Telecommunications Union (ITU)-approved JBIG2 standard for compression of black and white (bitonal) scanned documents. Reflecting this reality, "JBIG2" is an acronym for "Joint Bilevel Imaging Group 2."
Advantages of JBIG2
As you're about to see, the power of JBIG2 against its predecessors is its ability to achieve much higher compression rates, meaning that smaller files can retain the same information as the original scanned files in a lot less space. The results are more efficient storage, and greater speed of transmission - sometimes 10x faster - than TIFF G3, G4, or JBIG (also known as JBIG1).