Sustainability of Digital Formats: Planning for Library of Congress Collections
Sustainability of Digital Formats: Planning for Library of Congress Collections |
|
|
|
| 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, Amendment 1: Codestream Restrictions, Profile 3 (formal name); JPEG 2000 Profile 3 (common name) |
|---|---|
| Description | Implementation of JPEG 2000 Core Coding (Part 1) that constrains the use of variables in the specification ("restricts the codestream") to serve 2K presentations within the Digital Cinema Initiative's DCP_1_0. The restrictions include image size limited to 2,048 x 1,080 pixels, no more than one tile, 12-bit bit depth per component, no more than 5 decomposition levels, CPRL compression order, and maximum compressed bytes per frame (aggregate of color components) 1,302,083 (24 fps; 651,041 for 48 fps). Additional general information about JPEG 2000 profiles is provided in J2K_C Notes. |
| Production phase | Final-state content distribution by those who follow the Digital Cinema Initiative DCP_1_0 specification. |
| Relationship to other formats | |
| Subtype of | J2K_C, JPEG 2000 Part 1, Core Coding System |
| Used by | MXF_GC_JP2, MXF Generic Container Mapped to JPEG 2000 |
| Used by | JP2_J2K_C_Profile_3, JP2 File with JPEG 2000 Core Coding, Profile 3 |
| LC experience or existing holdings | See J2K_C |
|---|---|
| LC preference | See J2K_C |
| Disclosure | Open standard. |
|---|---|
| Documentation | ISO/IEC 15444-1:2004. Information technology - JPEG 2000 image coding system: Core coding system, Amendment 1: Profiles for digital cinema applications (2006) |
| Adoption | Employed in the Digital Cinema Package (DCP_1_0) for theatrical distribution. |
| Licensing and patents | See J2K_C |
| Transparency | See J2K_C |
| Self-documentation | See JP2_FF |
| External dependencies | See J2K_C |
| Technical protection considerations | See JP2_FF; see also DCDM_1_0 and DCP_1_0. |
| Still Image | |
|---|---|
| Normal rendering | See J2K_C |
| Clarity (high image resolution) | See J2K_C. |
| Color maintenance | See J2K_C |
| Support for vector graphics, including graphic effects and typography | See JP2_FF |
| Support for multispectral bands | Not relevant to this profile. |
| Functionality beyond normal rendering | See J2K_C and JP2_FF; see also DCDM_1_0 and DCP_1_0. |
| Tag | Value | Note |
|---|---|---|
| Filename extension | j2c |
Extension for raw codestreams; see also JP2_FF |
| Internet Media Type | See note. | See JP2_FF |
| Magic numbers | See note. | See JP2_FF |
| Indicator for profile, level, version, etc. | Rsiz=3 |
The profile indicator is the Rsiz value in the SIZ marker segment. |
| General | |
|---|---|
| History |
|
|