Format
JPX (JPEG 2000 part 2)
Summary
- Name
- JPX (JPEG 2000 part 2)
- Identifiers
-
- PUID: fmt/151
- MIME: image/jpx
- Format type
- Image (Raster)
- Family
- JPEG 2000
- Description
- JPX is an image file format extended from JP2, providing the potential for extended colour space support, alternative compression methods, and other features. JPX may be used in applications that require additional functionality or data structures beyond those defined in the JP2 file format.
- Format encoding
- Text
- File extensions
-
jpx,jpf - Submitted by
- Digital Preservation Department / The National Archives
Internal signatures
JPEG 2000 with Extensions
- Description
- BOF: ....jP ..‡.{4}ftypjpx
- Provenance
- self generated test files, http://www.jpeg.org/public/15444-2annexm.pdf
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- None
- Byte Sequence
0000000C6A5020200D0A870A{4}667479706A7078- Endianness
- Big-endian
Changelog
-
V82
- Release date
- 27 March 2015
-
Updated
JPX (JPEG 2000 part 2): MIME type added. Provided by Docuteam.
-
V75
- Release date
- 17 July 2014
-
Updated
JPX (JPEG 2000 part 2): Description amended at the suggestion of Koninklijke Bibliotheek.
-
V65
- Release date
- 25 October 2012
-
Updated
JPX (JPEG 2000 part 2): Renamed from JPEG 2000 Extended for clarity and consistency.
-
V62
- Release date
- 28 August 2012
-
Added signature
JPX (JPEG 2000 Extended): Signature developed through PRONOM Research.