Sustainability of Digital Formats
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Profile 4 for JPEG 2000, Part 1, Core Coding

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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, Amendment 1: Codestream Restrictions, Profile 4 (formal name); JPEG 2000 Profile 4 (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 4K presentations within the Digital Cinema Initiative's DCP_1_0. The restrictions include image size limited to 4,096 x 2,160 pixels, no more than one tile, 12-bit bit depth per component, no more than 6 decomposition levels, CPRL compression order, progression order and tile parts to support the scalable decompression of a 2K image as well as the 4K image, and maximum compressed bytes per frame (aggregate of color components) 1,302,083 (24 fps).

Additional general information about JPEG 2000 profiles is provided in the Notes to 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

Local use Explanation of format description terms

LC experience or existing holdings See J2K_C
LC preference See J2K_C

Sustainability factors Explanation of format description terms

Disclosure Open standard. See J2K_C
    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.

Quality and functionality factors Explanation of format description terms

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.

File type signifiers Explanation of format description terms

Tag Value Note
Filename extension j2c
Extension for raw codestreams; see also JP2_FF
Internet Media Type See related format.  See JP2_FF
Magic numbers See related format.  See JP2_FF
Indicator for profile, level, version, etc. Rsiz=4
The profile indicator is the Rsiz value in the SIZ marker segment

Notes Explanation of format description terms

General  
History  

Format specifications Explanation of format description terms


Useful references

URLs


Last Updated: 12/01/2013