Abstract
The CCITT Recommendation T.4 was developed by the Consultative Committee on Telephone and Telegraph (CCITT) in 1980 and amended in 1984 and 1988 for digital facsimile transmission on the public switched telephone network (PSTN) and international leased circuits. The aim of this standard was to enable two-tone A4 documents scanned at a normal resolution of 100 dots per inch (DPI) or 3.85 lines per millimeter and sampled at 1728 samples per line to be transmitted at 4800 bits per second in an average time of about 1 minute over the PSTN. It also provided improved image quality at 200 DPI or 7.7 lines per millimeter. This standard led to the success of Group 3 digital facsimile. The coding schemes specified in the CCITT Recommendation T.4 are also widely known as the CCITT Group 3 compression algorithms.
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© 1995 Springer Science+Business Media New York
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Kou, W. (1995). CCITT Facsimile Compression Standards. In: Digital Image Compression. The Springer International Series in Engineering and Computer Science, vol 333. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-2361-8_3
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DOI: https://doi.org/10.1007/978-1-4757-2361-8_3
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4419-5156-4
Online ISBN: 978-1-4757-2361-8
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