Sustainability of Digital Formats: Planning for Library of Congress Collections
Sustainability of Digital Formats: Planning for Library of Congress Collections |
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| Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact | |
| 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) |
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| 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 |
| 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. |
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| LC preference |
| Disclosure | See JP2_FF and J2K_C |
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| 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 |
| Still Image | |
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| 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 |
| Tag | Value | Note |
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| 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 |
| General | |
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| History |
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