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Format

JPEG 2000 Codestream

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Summary

Name
JPEG 2000 Codestream
Identifiers
  • PUID: fmt/1794
  • MIME: image/jp2
Format type
Image (Raster)
Family
JPEG 2000
Description
JPEG 2000 codestream (also known as J2K, J2C, or JPEG 2000 Part 1, Core Coding System) is the wavelet based compressed image format defined in Part 1 of the JPEG 2000 standard. Both lossy and lossless compression as supported. A JPEG 2000 codestream uses a variant of the JPEG format, with a nearly identical system of markers and segments.
File extensions
j2k, jpc, j2c
Source
Preservica / Preservica

Internal signatures

JPEG 2000 Codestream

Note
Based on the specification, start of codestream marker (0xFF4F) followed by image and tile size marker (0xFF51) at BOF, end of codestream marker (0xFFD9) at EOF.

Byte sequences

Min Frag Length
Absolute from BOF
Offset
0
Max offset
None
Byte Sequence
FF4FFF51
Endianness
None
Min Frag Length
Absolute from EOF
Offset
0
Max offset
None
Byte Sequence
FFD9
Endianness
None

Changelog

  • Updated in V118

    Release date
    30 April 2024

    JPEG 2000 Codestream: Added to the Added to the JPEG 2000 family. Submitted by Preservica.

  • Added in V110

    Release date
    14 March 2023

    JPEG 2000 Codestream: Signature researched and samples provided by Preservica.

    JPEG 2000 Codestream: Full entry added. Submitted by Preservica.