This CCITT Recommendation | ISO/IEC International Standard was prepared by CCITT Study Group VIII and the Joint
Photographic Experts Group (JPEG) of ISO/IEC JTC 1/SC 29/WG 10. This Experts Group was formed in 1986 to
establish a standard for the sequential progressive encoding of continuous tone grayscale and colour images.
Digital Compression and Coding of Continuous-tone Still images, is published in two parts:
Requirements and guidelines;
This part, Part 1, sets out requirements and implementation guidelines for continuous-tone still image encoding and
decoding processes, and for the coded representation of compressed image data for interchange between applications.
These processes and representations are intended to be generic, that is, to be applicable to a broad range of applications for
colour and grayscale still images within communications and computer systems. Part 2, sets out tests for determining
whether implementations comply with the requirments for the various encoding and decoding processes specified in Part
The user's attention is called to the possibility that for some of the coding processes specified herein compliance with
this Recommendation | International Standard may require use of an invention covered by patent rights. See Annex L for
The requirements which these processes must satisfy to be useful for specific image communications applications such as
facsimile, Videotex and audiographic conferencing are defined in CCITT Recommendation T.80. The intent is that the
generic processes of Recommendation T.80 will be incorporated into the various CCITT Recommendations for terminal
equipment for these applications.
In addition to the applications addressed by the CCITT and ISO/IEC, the JPEG committee has developped a compression
standard to meet the needs of other applications as well, including desktop publishing, graphic arts, medical imaging and
Annexes A, B, C, D, E, F, G, H and J are normative, and thus form an integral part of this Specification. Annexes K, L
and M are informative and thus do not form an integral part of this Specification.
This Specification aims to follow the guidelines of CCITT and ISO/IEC JTC 1 on Rules for presentation of CCITT |
ISO/IEC common text.