Sustainability of Digital Formats
 Planning for Library of Congress Collections

Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact
Format Description Categories >> Browse Alphabetical List

JP2 File Format with JPEG 2000 Core Coding, Lossy

>> Back
Table of Contents
Format Description Properties Explanation of format description terms

Identification and description Explanation of format description terms

Full name ISO/IEC 15444-1:2004. Information technology -- JPEG 2000 image coding system -- Part 1: Core coding system, file format as specified in Annex I, with lossy encoded bitstream (formal name); JPEG 2000 jp2 file format with lossy data (common name)
Description JPEG 2000 core (part 1) wrapper containing lossy encoded data.
Production phase May be used for content in initial, middle, and final states.
Relationship to other formats
    Subtype of JP2_FF, JPEG 2000 Part 1 (Core) jp2 File Format
    Contains J2K_C_LSY, JPEG 2000 Part 1, Core Coding, Lossy

Local use Explanation of format description terms

LC experience or existing holdings JP2_J2K_C_LSY files are being used for the service images of maps in American Memory. Meanwhile, the Library and the National Endowment for the Humanities have specified JP2_J2K_C_NDNP for use as lossy-compressed service images in the National Digital Newspaper Program, launched in 2004. For detail, see the NDNP technical guidelines. These practices feature the use of JP2_J2K_C_LSY for service images. At this writing (January 2012), there are plans to study the applicability of both lossless and lossy JPEG 2000 as master images (in the JPEG 2000 wrapper) for various still-image-based reformatting projects.
LC preference  

Sustainability factors Explanation of format description terms

Disclosure See JP2_FF and J2K_C
    Documentation See JP2_FF and J2K_C
Adoption See JP2_FF
    Licensing and patents See JP2_FF and J2K_C
Transparency See J2K_C
Self-documentation See JP2_FF
External dependencies See JP2_FF and J2K_C
Technical protection considerations See JP2_FF

Quality and functionality factors Explanation of format description terms

Still Image
Normal rendering Good support.
Clarity (high image resolution) See J2K_C
Color maintenance See JP2_FF and J2K_C
Support for vector graphics, including graphic effects and typography See JP2_FF
Support for multispectral bands See JP2_FF
Functionality beyond normal rendering See JP2_FF and J2K_C

File type signifiers Explanation of format description terms

Tag Value Note
Filename extension See related format. 

See JP2_FF

Internet Media Type See related format. 

See JP2_FF

Magic numbers See related format. 

See JP2_FF

File type brand (ISO Base Media File Format) See related format. 

See JP2_FF

Uniform Type Identifier (Mac OS) See related format. 

See JP2_FF


Notes Explanation of format description terms

General  
History  

Format specifications Explanation of format description terms


Useful references

URLs


Last Updated: 12/03/2013