History
The Djvu technology was originally developed by Yann LeCun, Léon Bottou, Patrick Haffner, and Paul G. Howard at AT&T Labs from 1996 to 2001.
Due to its declared higher compression ratio (and thus smaller file size) and the ease of converting large volumes of text into Djvu format, and because it is an open file format, some independent technologists (such as Brewster Kahle) have historically considered it superior to PDF.
The DjVu library distributed as part of the open source package DjVuLibre has become the reference implementation for the DjVu format. DjVuLibre has been maintained and updated by the original developers of DjVu since 2002.
The DjVu file format specification has gone through a number of revisions:
| Support status | Version | Release date | Notes |
|---|---|---|---|
| Unsupported | 1–19 | 1996–1999 | Developmental versions by AT&T labs preceding the sale of the format to LizardTech. |
| Unsupported | Version 20 | April 1999 | DjVu version 3. DjVu changed from a single-page format to a multipage format. |
| Older, still supported | Version 21 | September 1999 | Indirect storage format replaced. The searchable text layer was added. |
| Older, still supported | Version 22 | April 2001 | Page Orientation, Color JB2 |
| Unsupported | Version 23 | July 2002 | CID chunk |
| Unsupported | Version 24 | February 2003 | LTAnno chunk |
| Older, still supported | Version 25 | May 2003 | NAVM chunk. Support for DjVu bookmarks (outlines) was added. Changes made by Versions 23 and 24 were made obsolete. |
| Current | Version 26 | April 2005 | Text / Line annotations |
Read more about this topic: DjVu
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