JPEG Network Graphics

Name: JPEG Network Graphics


Description: JPEG Network Graphics (JNG) is a JPEG-based graphics file format which is closely related to PNG: it uses the PNG file structure (with a different signature) as a container format to wrap JPEG encoded image data. JNG was created as an adjunct to the MNG animation format, but may be used as a stand-alone format. JNG files embed an 8-bit or 12-bit JPEG datastream in order to store color data, and may embed another datastream (1, 2, 4, 8, 16 bit PNG, or 8 bit JPEG grayscale image) for transparency information. However, a JNG may contain two separate JPEG datastreams for color information (one eight-bit and one twelve-bit) to permit decoders that are unable to (or do not wish to) handle twelve-bit datastreams to display the eight-bit datastream instead, if one is present.

Deprecated: false

MIMEType: image/x-jng

PUID: fmt/529

sameAs : PRONOM:

Extension: jng

Magic: true

Container Magic: false

Binary Magic: true

Signature Priority Over:

See Also (e.g. Wikidata, Library of Congress):

Software that can read the format: